在PXC中重新添加掉线节点
分类:美高梅-数据

 

Preface

 

    When we add a new node into PXC structure,it will estimate the mothed(IST/SST) to transfer data to the new node.It's no wonder that sst will be automatically choosed.What if a dropped node in PXC by accident want to rejoin the cluster?Especially it has been a long period of time after it was dropped out.We should avoid starting up the node directly.As the SST(either xtrabackup-v2 or rsync mode) will be choosed to resynchronize the dropped node instead of IST.Generally speaking,SST may cause to decline the perormance of the whole cluster.It's recommend to use another way to deal with that kind of issue.That is,slave replication.

 

Framework

 

Hostname IP Port OS Version MySQL Version Xtrabackup version
zlm2 192.168.1.101 3308 CentOS 7.0 PXC 5.7.22 2.4.12 Linux (x86_64)
zlm3 192.168.1.102 3308 CentOS 7.0 PXC 5.7.22 2.4.12 Linux (x86_64)
zlm4 192.168.1.103 3308 CentOS 7.0 PXC 5.7.22 2.4.12 Linux (x86_64)

 

Procedure

 

what's show in error log of initiating SST/IST transfer operation on a new added node.

 1 2018-08-09T07:23:32.568794+01:00 0 [Note] WSREP: Initiating SST/IST transfer on JOINER side (wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.1.103' --datadir '/data/mysql/mysql3308/data/' --defaults-file '/data/mysql/mysql3308/my3308.cnf' --defaults-group-suffix '' --parent '4433' --binlog '/data/mysql/mysql3308/logs/mysql-bin' )
 2 2018-08-09T07:23:33.225673+01:00 2 [Note] WSREP: Prepared SST/IST request: xtrabackup-v2|192.168.1.103:4444/xtrabackup_sst//1
 3 2018-08-09T07:23:33.225697+01:00 2 [Note] WSREP: Auto Increment Offset/Increment re-align with cluster membership change (Offset: 1 -> 3) (Increment: 1 -> 3)
 4 2018-08-09T07:23:33.225704+01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
 5 2018-08-09T07:23:33.225721+01:00 2 [Note] WSREP: Assign initial position for certification: 22, protocol version: 3
 6 2018-08-09T07:23:33.225760+01:00 0 [Note] WSREP: Service thread queue flushed.
 7 2018-08-09T07:23:33.226619+01:00 2 [Note] WSREP: Check if state gap can be serviced using IST
 8 2018-08-09T07:23:33.226638+01:00 2 [Note] WSREP: Local UUID: 00000000-0000-0000-0000-000000000000 != Group UUID: bd5525ab-9a15-11e8-aa0f-4b830c783fc7
 9 2018-08-09T07:23:33.226677+01:00 2 [Note] WSREP: State gap can't be serviced using IST. Switching to SST
10 2018-08-09T07:23:33.226683+01:00 2 [Note] WSREP: Failed to prepare for incremental state transfer: Local state UUID (00000000-0000-0000-0000-000000000000) does not match group state UUID (bd5525ab-9a15-11e8-aa0f-4b830c783fc7): 1 (Operation not permitted)
11      at galera/src/replicator_str.cpp:prepare_for_IST():538. IST will be unavailable.
12 2018-08-09T07:23:33.228003+01:00 0 [Note] WSREP: Member 2.0 (zlm4) requested state transfer from '*any*'. Selected 0.0 (zlm2)(SYNCED) as donor.
13 2018-08-09T07:23:33.228029+01:00 0 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 22)
14 2018-08-09T07:23:33.228088+01:00 2 [Note] WSREP: Requesting state transfer: success, donor: 0
15 2018-08-09T07:23:33.228108+01:00 2 [Note] WSREP: GCache history reset: 00000000-0000-0000-0000-000000000000:0 -> bd5525ab-9a15-11e8-aa0f-4b830c783fc7:22
16     2018-08-09T05:23:33.781389Z WSREP_SST: [INFO] Proceeding with SST.........
17     2018-08-09T05:23:33.808866Z WSREP_SST: [INFO] ............Waiting for SST streaming to complete!

 

**Check the PXC status at first.**

 1 (zlm@192.168.1.101 3308)[(none)]>show global status like '%wsrep%';
 2 +----------------------------------+----------------------------------------------------------+
 3 | Variable_name                    | Value                                                    |
 4 +----------------------------------+----------------------------------------------------------+
 5 | wsrep_local_state_uuid           | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
 6 | wsrep_protocol_version           | 8                                                        |
 7 | wsrep_last_applied               | 22                                                       |
 8 | wsrep_last_committed             | 22                                                       |
 9 | wsrep_replicated                 | 0                                                        |
10 | wsrep_replicated_bytes           | 0                                                        |
11 | wsrep_repl_keys                  | 0                                                        |
12 | wsrep_repl_keys_bytes            | 0                                                        |
13 | wsrep_repl_data_bytes            | 0                                                        |
14 | wsrep_repl_other_bytes           | 0                                                        |
15 | wsrep_received                   | 21                                                       |
16 | wsrep_received_bytes             | 2733                                                     |
17 | wsrep_local_commits              | 0                                                        |
18 | wsrep_local_cert_failures        | 0                                                        |
19 | wsrep_local_replays              | 0                                                        |
20 | wsrep_local_send_queue           | 0                                                        |
21 | wsrep_local_send_queue_max       | 1                                                        |
22 | wsrep_local_send_queue_min       | 0                                                        |
23 | wsrep_local_send_queue_avg       | 0.000000                                                 |
24 | wsrep_local_recv_queue           | 0                                                        |
25 | wsrep_local_recv_queue_max       | 2                                                        |
26 | wsrep_local_recv_queue_min       | 0                                                        |
27 | wsrep_local_recv_queue_avg       | 0.047619                                                 |
28 | wsrep_local_cached_downto        | 0                                                        |
29 | wsrep_flow_control_paused_ns     | 0                                                        |
30 | wsrep_flow_control_paused        | 0.000000                                                 |
31 | wsrep_flow_control_sent          | 0                                                        |
32 | wsrep_flow_control_recv          | 0                                                        |
33 | wsrep_flow_control_interval      | [ 173, 173 ]                                             |
34 | wsrep_flow_control_interval_low  | 173                                                      |
35 | wsrep_flow_control_interval_high | 173                                                      |
36 | wsrep_flow_control_status        | OFF                                                      |
37 | wsrep_cert_deps_distance         | 0.000000                                                 |
38 | wsrep_apply_oooe                 | 0.000000                                                 |
39 | wsrep_apply_oool                 | 0.000000                                                 |
40 | wsrep_apply_window               | 0.000000                                                 |
41 | wsrep_commit_oooe                | 0.000000                                                 |
42 | wsrep_commit_oool                | 0.000000                                                 |
43 | wsrep_commit_window              | 0.000000                                                 |
44 | wsrep_local_state                | 4                                                        |
45 | wsrep_local_state_comment        | Synced                                                   |
46 | wsrep_cert_index_size            | 0                                                        |
47 | wsrep_cert_bucket_count          | 22                                                       |
48 | wsrep_gcache_pool_size           | 1712                                                     |
49 | wsrep_causal_reads               | 0                                                        |
50 | wsrep_cert_interval              | 0.000000                                                 |
51 | wsrep_ist_receive_status         |                                                          |
52 | wsrep_ist_receive_seqno_start    | 0                                                        |
53 | wsrep_ist_receive_seqno_current  | 0                                                        |
54 | wsrep_ist_receive_seqno_end      | 0                                                        |
55 | wsrep_incoming_addresses         | 192.168.1.101:3308,192.168.1.102:3308,192.168.1.103:3308 |
56 | wsrep_desync_count               | 0                                                        |
57 | wsrep_evs_delayed                |                                                          |
58 | wsrep_evs_evict_list             |                                                          |
59 | wsrep_evs_repl_latency           | 0/0/0/0/0                                                |
60 | wsrep_evs_state                  | OPERATIONAL                                              |
61 | wsrep_gcomm_uuid                 | 13eae368-9b79-11e8-9053-338307f4c6cc                     |
62 | wsrep_cluster_conf_id            | 11                                                       |
63 | wsrep_cluster_size               | 3                                                        | //It means I've got three nodes in PXC.
64 | wsrep_cluster_state_uuid         | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
65 | wsrep_cluster_status             | Primary                                                  |
66 | wsrep_connected                  | ON                                                       |
67 | wsrep_local_bf_aborts            | 0                                                        |
68 | wsrep_local_index                | 0                                                        |
69 | wsrep_provider_name              | Galera                                                   |
70 | wsrep_provider_vendor            | Codership Oy <info@codership.com>                        |
71 | wsrep_provider_version           | 3.26(r)                                                  |
72 | wsrep_ready                      | ON                                                       |
73 +----------------------------------+----------------------------------------------------------+
74 68 rows in set (0.00 sec)

 

Shutdown MySQL instance on zlm4.

 1 [root@zlm4 09:02:18 /data/mysql/mysql3308]
 2 #!ps
 3 ps aux|grep mysqld
 4 mysql     5367  0.2 21.9 1574708 223476 pts/0  Sl   08:00   0:07 mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf
 5 root      5809  0.0  0.0 112640   960 pts/0    R+   09:02   0:00 grep --color=auto mysqld
 6 
 7 [root@zlm4 09:02:22 /data/mysql/mysql3308]
 8 #pkill mysqld
 9 
10 [root@zlm4 09:02:43 /data/mysql/mysql3308]
11 #!ps
12 ps aux|grep mysqld
13 root      5827  0.0  0.0 112640   960 pts/0    R+   09:02   0:00 grep --color=auto mysqld
14 [1]+  Done                    mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf

 

Check the error log on node zlm3.

 1 [root@zlm3 09:01:42 /data/mysql/mysql3308/data]
 2 #tail -f error.log 
 3 2018-08-09T09:02:44.880772+01:00 0 [Note] WSREP: (23fb8f7a, 'tcp://0.0.0.0:4567') turning message relay requesting on, nonlive peers: tcp://192.168.1.103:4567 
 4 2018-08-09T09:02:44.880866+01:00 0 [Note] WSREP: declaring 13eae368 at tcp://192.168.1.101:4567 stable
 5 2018-08-09T09:02:44.880877+01:00 0 [Note] WSREP: forgetting 74f3db69 (tcp://192.168.1.103:4567)
 6 2018-08-09T09:02:44.880899+01:00 0 [Note] WSREP: (23fb8f7a, 'tcp://0.0.0.0:4567') turning message relay requesting off
 7 2018-08-09T09:02:44.884451+01:00 0 [Note] WSREP: Node 13eae368 state primary
 8 2018-08-09T09:02:44.887086+01:00 0 [Note] WSREP: Current view of cluster as seen by this node
 9 view (view_id(PRIM,13eae368,12)
10 memb {
11     13eae368,0
12     23fb8f7a,0
13     }
14 joined {
15     }
16 left {
17     }
18 partitioned {
19     74f3db69,0
20     }
21 )
22 2018-08-09T09:02:44.887205+01:00 0 [Note] WSREP: Save the discovered primary-component to disk
23 2018-08-09T09:02:44.887402+01:00 0 [Note] WSREP: forgetting 74f3db69 (tcp://192.168.1.103:4567)
24 2018-08-09T09:02:44.887688+01:00 0 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 1, memb_num = 2
25 2018-08-09T09:02:44.887705+01:00 0 [Note] WSREP: STATE EXCHANGE: Waiting for state UUID.
26 2018-08-09T09:02:44.888444+01:00 0 [Note] WSREP: STATE EXCHANGE: sent state msg: 37401cc1-9ba2-11e8-87aa-2f9e83444bbe
27 2018-08-09T09:02:44.889150+01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: 37401cc1-9ba2-11e8-87aa-2f9e83444bbe from 0 (zlm2)
28 2018-08-09T09:02:44.889187+01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: 37401cc1-9ba2-11e8-87aa-2f9e83444bbe from 1 (zlm3)
29 2018-08-09T09:02:44.889198+01:00 0 [Note] WSREP: Quorum results:
30     version    = 4,
31     component  = PRIMARY,
32     conf_id    = 11,
33     members    = 2/2 (primary/total),
34     act_id     = 22,
35     last_appl. = 0,
36     protocols  = 0/8/3 (gcs/repl/appl),
37     group UUID = bd5525ab-9a15-11e8-aa0f-4b830c783fc7
38 2018-08-09T09:02:44.889206+01:00 0 [Note] WSREP: Flow-control interval: [141, 141]
39 2018-08-09T09:02:44.889210+01:00 0 [Note] WSREP: Trying to continue unpaused monitor
40 2018-08-09T09:02:44.889304+01:00 2 [Note] WSREP: REPL Protocols: 8 (3, 2)
41 2018-08-09T09:02:44.889315+01:00 2 [Note] WSREP: New cluster view: global state: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:22, view# 12: Primary, number of nodes: 2, my index: 1, protocol version 3
42 2018-08-09T09:02:44.889319+01:00 2 [Note] WSREP: Setting wsrep_ready to true
43 2018-08-09T09:02:44.889324+01:00 2 [Note] WSREP: Auto Increment Offset/Increment re-align with cluster membership change (Offset: 2 -> 2) (Increment: 3 -> 2)
44 2018-08-09T09:02:44.889328+01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
45 2018-08-09T09:02:44.889336+01:00 2 [Note] WSREP: Assign initial position for certification: 22, protocol version: 3
46 2018-08-09T09:02:44.889355+01:00 0 [Note] WSREP: Service thread queue flushed.
47 2018-08-09T09:02:50.000210+01:00 0 [Note] WSREP:  cleaning up 74f3db69 (tcp://192.168.1.103:4567)

 

**Do some DML operations on node zlm3.**

 1 [root@zlm3 09:07:05 /data/mysql/mysql3308/data]
 2 #mysql -uzlm -pzlmzlm -h192.168.1.102 -P3308
 3 mysql: [Warning] Using a password on the command line interface can be insecure.
 4 Welcome to the MySQL monitor.  Commands end with ; or g.
 5 Your MySQL connection id is 5
 6 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 7 
 8 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 9 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
10 
11 Oracle is a registered trademark of Oracle Corporation and/or its
12 affiliates. Other names may be trademarks of their respective
13 owners.
14 
15 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
16 
17 (zlm@192.168.1.102 3308)[(none)]>show databases;
18 +--------------------+
19 | Database           |
20 +--------------------+
21 | information_schema |
22 | mysql              |
23 | performance_schema |
24 | sys                |
25 +--------------------+
26 4 rows in set (0.01 sec)
27 
28 (zlm@192.168.1.102 3308)[(none)]>create database zlm;
29 Query OK, 1 row affected (0.01 sec)
30 
31 (zlm@192.168.1.102 3308)[(none)]>use zlm;
32 Database changed
33 (zlm@192.168.1.102 3308)[zlm]>create table t1(
34     -> id int,
35     -> name char(10)
36     -> ) engine=innodb charset=utf8mb4;
37 Query OK, 0 rows affected (0.04 sec)
38 
39 (zlm@192.168.1.102 3308)[zlm]>insert into t1 values(1,'MySQL'),(2,'Oracle'),(3,'PostgreSQL');
40 ERROR 1105 (HY000): Percona-XtraDB-Cluster prohibits use of DML command on a table (zlm.t1) without an explicit primary key with pxc_strict_mode = ENFORCING or MASTER //DML of tables need explicit primary key in PXC.
41 (zlm@192.168.1.102 3308)[zlm]>alter table t1 add primary key(id);
42 Query OK, 0 rows affected (0.08 sec)
43 Records: 0  Duplicates: 0  Warnings: 0
44 
45 (zlm@192.168.1.102 3308)[zlm]>insert into t1 values(1,'MySQL'),(2,'Oracle'),(3,'PostgreSQL');
46 Query OK, 3 rows affected (0.01 sec)
47 Records: 3  Duplicates: 0  Warnings: 0
48 
49 (zlm@192.168.1.102 3308)[zlm]>select * from t1;
50 +----+------------+
51 | id | name       |
52 +----+------------+
53 |  1 | MySQL      |
54 |  2 | Oracle     |
55 |  3 | PostgreSQL |
56 +----+------------+
57 3 rows in set (0.00 sec)

 

**Check the table on node zlm2.**

 1 [root@zlm2 09:08:15 ~]
 2 #mysql -uzlm -pzlmzlm -h192.168.1.101 -P3308
 3 mysql: [Warning] Using a password on the command line interface can be insecure.
 4 Welcome to the MySQL monitor.  Commands end with ; or g.
 5 Your MySQL connection id is 9
 6 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 7 
 8 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 9 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
10 
11 Oracle is a registered trademark of Oracle Corporation and/or its
12 affiliates. Other names may be trademarks of their respective
13 owners.
14 
15 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
16 
17 (zlm@192.168.1.101 3308)[(none)]>select * from zlm.t1;
18 +----+------------+
19 | id | name       |
20 +----+------------+
21 |  1 | MySQL      |
22 |  2 | Oracle     |
23 |  3 | PostgreSQL |
24 +----+------------+
25 3 rows in set (0.00 sec)
26 
27 //The PXC is working normally now.

 

**Generate a backup set by Xtrabackup on node zlm3.**

 1 [root@zlm3 09:25:44 ~]
 2 #innobackupex --defaults-file=/data/mysql/mysql3308/my3308.cnf --user=root --password=Passw0rd --host=localhost -S /tmp/mysql3308.sock --port=3308 /data/backup
 3 xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3308/data --server-id=1023308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
 4 xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3308/data --server-id=1023308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
 5 180809 09:26:05 innobackupex: Starting the backup operation
 6 
 7 ... //Omitted.
 8 
 9 180809 09:26:17 Finished backing up non-InnoDB tables and files
10 180809 09:26:17 Executing LOCK BINLOG FOR BACKUP... //Here's the difference of lock mode between community and percona version of MySQL.
11 180809 09:26:17 [00] Writing /data/backup/2018-08-09_09-26-05/xtrabackup_binlog_info
12 180809 09:26:17 [00]        ...done
13 180809 09:26:17 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
14 xtrabackup: The latest check point (for incremental): '2626843'
15 xtrabackup: Stopping log copying thread.
16 .180809 09:26:17 >> log scanned up to (2626852)
17 
18 180809 09:26:17 Executing UNLOCK BINLOG
19 180809 09:26:17 Executing UNLOCK TABLES
20 180809 09:26:17 All tables unlocked
21 180809 09:26:17 [00] Copying ib_buffer_pool to /data/backup/2018-08-09_09-26-05/ib_buffer_pool
22 180809 09:26:17 [00]        ...done
23 180809 09:26:17 Backup created in directory '/data/backup/2018-08-09_09-26-05/'
24 MySQL binlog position: filename 'mysql-bin.000023', position '1107', GTID of the last change '42aada54-65ea-ee17-55f0-b47cf387c038:1-23'
25 180809 09:26:17 [00] Writing /data/backup/2018-08-09_09-26-05/backup-my.cnf
26 180809 09:26:17 [00]        ...done
27 180809 09:26:17 [00] Writing /data/backup/2018-08-09_09-26-05/xtrabackup_info
28 180809 09:26:17 [00]        ...done
29 xtrabackup: Transaction log of lsn (2626827) to (2626852) was copied.
30 180809 09:26:17 completed OK!

 

**Copy the backup set to node zlm4.**

1 [root@zlm3 09:31:07 ~]
2 #scp -r /data/backup/2018-08-09_09-26-05/ zlm4:/data/backup/
3 root@zlm4's password: 
4 xtrabackup_logfile                                                                                                 100% 2560     2.5KB/s   00:00    
5 ibdata1                                                                                                            100%  100MB  33.3MB/s   00:03    
6 plugin.ibd                                                                                                         100%   96KB  96.0KB/s   00:00    
7 servers.ibd                                                                                                        100%   96KB  96.0KB/s   00:00
8 ... //Omitted.

 

**Restore backup on node zlm4.**

 

 1 [root@zlm4 09:43:26 /data/backup]
 2 #innobackupex --apply-log /data/backup/2018-08-09_09-26-05/
 3 xtrabackup: recognized server arguments: --innodb_checksum_algorithm=crc32 --innodb_log_checksum_algorithm=strict_crc32 --innodb_data_file_path=ibdata1:100M:autoextend --innodb_log_files_in_group=3 --innodb_log_file_size=104857600 --innodb_fast_checksum=0 --innodb_page_size=16384 --innodb_log_block_size=512 --innodb_undo_directory=./ --innodb_undo_tablespaces=0 --server-id=1023308 --redo-log-version=1 --innodb_buffer_pool_filename=ib_buffer_pool 
 4 xtrabackup: recognized client arguments: --innodb_checksum_algorithm=crc32 --innodb_log_checksum_algorithm=strict_crc32 --innodb_data_file_path=ibdata1:100M:autoextend --innodb_log_files_in_group=3 --innodb_log_file_size=104857600 --innodb_fast_checksum=0 --innodb_page_size=16384 --innodb_log_block_size=512 --innodb_undo_directory=./ --innodb_undo_tablespaces=0 --server-id=1023308 --redo-log-version=1 --innodb_buffer_pool_filename=ib_buffer_pool 
 5 180809 09:45:56 innobackupex: Starting the apply-log operation
 6 
 7 ... //Omitted.
 8 
 9 InnoDB: Waiting for purge to start
10 InnoDB: 5.7.19 started; log sequence number 2627605
11 xtrabackup: starting shutdown with innodb_fast_shutdown = 1
12 InnoDB: page_cleaner: 1000ms intended loop took 17036ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.)
13 InnoDB: FTS optimize thread exiting.
14 InnoDB: Starting shutdown...
15 InnoDB: Shutdown completed; log sequence number 2627624
16 180809 09:46:17 completed OK!
17 
18 [root@zlm4 09:52:44 /data/mysql/mysql3308/data]
19 #ls -l
20 total 540792
21 -rw-r----- 1 mysql mysql        56 Aug  9 08:00 auto.cnf
22 -rw------- 1 mysql mysql      1680 Aug  9 08:00 ca-key.pem
23 -rw-r--r-- 1 mysql mysql      1120 Aug  9 08:00 ca.pem
24 -rw-r--r-- 1 mysql mysql      1120 Aug  9 08:00 client-cert.pem
25 -rw------- 1 mysql mysql      1680 Aug  9 08:00 client-key.pem
26 -rw-r----- 1 mysql mysql     38775 Aug  9 09:02 error.log
27 -rw-r----- 1 mysql mysql 134219048 Aug  9 09:02 galera.cache
28 -rw-r----- 1 mysql mysql       113 Aug  9 09:02 grastate.dat
29 -rw-r----- 1 mysql mysql       280 Aug  9 09:02 ib_buffer_pool
30 -rw-r----- 1 mysql mysql 104857600 Aug  9 09:02 ibdata1
31 -rw-r----- 1 mysql mysql 104857600 Aug  9 09:02 ib_logfile0
32 -rw-r----- 1 mysql mysql 104857600 Aug  9 08:00 ib_logfile1
33 -rw-r----- 1 mysql mysql 104857600 Aug  9 08:00 ib_logfile2
34 drwxr-x--- 2 mysql mysql      4096 Aug  9 08:00 mysql
35 drwxr-x--- 2 mysql mysql      8192 Aug  9 08:00 performance_schema
36 -rw------- 1 mysql mysql      1676 Aug  9 08:00 private_key.pem
37 -rw-r--r-- 1 mysql mysql       452 Aug  9 08:00 public_key.pem
38 -rw-r--r-- 1 mysql mysql      1120 Aug  9 08:00 server-cert.pem
39 -rw------- 1 mysql mysql      1676 Aug  9 08:00 server-key.pem
40 -rw-r----- 1 mysql mysql       227 Aug  9 08:00 slow.log
41 drwxr-x--- 2 mysql mysql      8192 Aug  9 08:00 sys
42 
43 [root@zlm4 09:57:51 /data/mysql/mysql3308/data]
44 #rm -rf *
45 
46 [root@zlm4 09:59:35 /data/mysql/mysql3308/data]
47 #innobackupex --defaults-file=/data/mysql/mysql3308/my3308.cnf --copy-back /data/backup/2018-08-09_09-26-05/
48 xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3308/data --server-id=1033308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
49 xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3308/data --server-id=1033308 --open_files_limit=65536 --log_bin=/data/mysql/mysql3308/logs/mysql-bin --innodb_data_file_path=ibdata1:100M:autoextend --innodb_buffer_pool_filename=ib_buffer_pool --innodb_log_files_in_group=3 --innodb_log_file_size=100M --innodb_file_per_table=1 --innodb_open_files=65535 --innodb_page_size=16k --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --innodb_doublewrite=1 --innodb_log_buffer_size=128M --innodb_flush_log_at_trx_commit=1 --innodb_buffer_pool_size=100M --innodb_flush_method=O_DIRECT 
50 180809 10:00:09 innobackupex: Starting the copy-back operation
51 
52 [root@zlm4 10:01:16 /data/mysql/mysql3308/data]
53 #ls -l
54 total 421936
55 -rw-r----- 1 root root       293 Aug  9 10:00 ib_buffer_pool
56 -rw-r----- 1 root root 104857600 Aug  9 10:00 ibdata1
57 -rw-r----- 1 root root 104857600 Aug  9 10:00 ib_logfile0
58 -rw-r----- 1 root root 104857600 Aug  9 10:00 ib_logfile1
59 -rw-r----- 1 root root 104857600 Aug  9 10:00 ib_logfile2
60 -rw-r----- 1 root root  12582912 Aug  9 10:00 ibtmp1
61 drwxr-x--- 2 root root      4096 Aug  9 10:00 mysql
62 drwxr-x--- 2 root root      8192 Aug  9 10:00 performance_schema
63 drwxr-x--- 2 root root      8192 Aug  9 10:00 sys
64 -rw-r----- 1 root root        22 Aug  9 10:00 xtrabackup_binlog_pos_innodb
65 -rw-r----- 1 root root        39 Aug  9 10:00 xtrabackup_galera_info
66 -rw-r----- 1 root root       650 Aug  9 10:00 xtrabackup_info
67 -rw-r----- 1 root root         1 Aug  9 10:00 xtrabackup_master_key_id
68 drwxr-x--- 2 root root        45 Aug  9 10:00 zlm
69 
70 [root@zlm4 10:02:23 /data/mysql/mysql3308/data]
71 #chown -R mysql.mysql *

 

Modify the my3308.cnf to omit the PXC relevant parameter and startup mysqld.

 1 [root@zlm4 10:05:33 /data/mysql/mysql3308]
 2 #cat my3308.cnf |grep wsrep
 3 #loose-wsrep_cluster_name=pxc_wubx 
 4 #loose-wsrep_cluster_address=gcomm://192.168.1.101,192.168.1.102,192.168.1.103
 5 #loose-wsrep_node_address=192.168.1.103
 6 #loose-wsrep_provider=/usr/local/mysql/lib/libgalera_smm.so
 7 #loose-wsrep_sst_method=xtrabackup-v2
 8 #loose-wsrep_sst_method=rsync
 9 #loose-wsrep_sst_auth=sst:zlmzlm
10 #loose-wsrep_debug=on
11 #loose-wsrep_provider_options="debug=on"
12 
13 [root@zlm4 10:08:04 /data/mysql/mysql3308]
14 #mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf &
15 [1] 6094
16 
17 [root@zlm4 10:08:07 /data/mysql/mysql3308]
18 #!ps
19 ps aux|grep mysqld
20 mysql     6094 24.3 17.9 1238476 182592 pts/0  Sl   10:08   0:00 mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf
21 root      6128  0.0  0.0 112640   956 pts/0    R+   10:08   0:00 grep --color=auto mysqld

 

Implement a master-slave structure between node zlm3 and zlm4.

  1 //Create a replication user on node zlm3.
  2 (zlm@192.168.1.102 3308)[zlm]>grant all privileges on *.* to repl@'192.168.1.%' identified by 'repl4slave';
  3 ERROR 1045 (28000): Access denied for user 'zlm'@'192.168.1.%' (using password: YES)
  4 (zlm@192.168.1.102 3308)[zlm]>q
  5 Bye
  6 
  7 [root@zlm3 10:11:28 /data/mysql/mysql3308/data]
  8 #mysql -uroot -pPassw0rd -hlocalhost -P3308
  9 mysql: [Warning] Using a password on the command line interface can be insecure.
 10 ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql3306.sock' (2)
 11 
 12 [root@zlm3 10:11:48 /data/mysql/mysql3308/data]
 13 #mysql -uroot -pPassw0rd -hlocalhost -P3308 -S /tmp/mysql3308.sock
 14 mysql: [Warning] Using a password on the command line interface can be insecure.
 15 Welcome to the MySQL monitor.  Commands end with ; or g.
 16 Your MySQL connection id is 8
 17 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 18 
 19 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 20 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 21 
 22 Oracle is a registered trademark of Oracle Corporation and/or its
 23 affiliates. Other names may be trademarks of their respective
 24 owners.
 25 
 26 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
 27 
 28 (root@localhost mysql3308.sock)[(none)]>grant all privileges on *.* to repl@'192.168.1.%' identified by 'repl4slave';
 29 Query OK, 0 rows affected, 1 warning (0.00 sec)
 30 
 31 (root@localhost mysql3308.sock)[(none)]>select user,host from mysql.user;
 32 +---------------+-------------+
 33 | user          | host        |
 34 +---------------+-------------+
 35 | repl          | 192.168.1.% |
 36 | zlm           | 192.168.1.% |
 37 | mysql.session | localhost   |
 38 | mysql.sys     | localhost   |
 39 | root          | localhost   |
 40 | sst           | localhost   |
 41 +---------------+-------------+
 42 6 rows in set (0.01 sec)
 43 
 44 //Execute "change master to ... " on node zlm4.
 45 [root@zlm4 10:14:37 /data/mysql/mysql3308]
 46 #mysql -uzlm -pzlmzlm -h192.168.1.103 -P3308
 47 mysql: [Warning] Using a password on the command line interface can be insecure.
 48 Welcome to the MySQL monitor.  Commands end with ; or g.
 49 Your MySQL connection id is 2
 50 Server version: 5.7.22-22-29.26-log Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
 51 
 52 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 53 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 54 
 55 Oracle is a registered trademark of Oracle Corporation and/or its
 56 affiliates. Other names may be trademarks of their respective
 57 owners.
 58 
 59 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
 60 
 61 (zlm@192.168.1.103 3308)[(none)]>change master to master_host='192.168.1.102',master_port=3308,master_user='repl',master_password='repl4slave',master_auto_position=1;
 62 Query OK, 0 rows affected, 1 warning (0.02 sec)
 63 
 64 (zlm@192.168.1.103 3308)[(none)]>start slave;
 65 Query OK, 0 rows affected (0.02 sec)
 66 
 67 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
 68 *************************** 1. row ***************************
 69                Slave_IO_State: Waiting for master to send event
 70                   Master_Host: 192.168.1.102
 71                   Master_User: repl
 72                   Master_Port: 3308
 73                 Connect_Retry: 60
 74               Master_Log_File: mysql-bin.000023
 75           Read_Master_Log_Pos: 1397
 76                Relay_Log_File: zlm4-relay-bin.000002
 77                 Relay_Log_Pos: 367
 78         Relay_Master_Log_File: mysql-bin.000023
 79              Slave_IO_Running: Yes
 80             Slave_SQL_Running: No
 81               Replicate_Do_DB: 
 82           Replicate_Ignore_DB: 
 83            Replicate_Do_Table: 
 84        Replicate_Ignore_Table: 
 85       Replicate_Wild_Do_Table: 
 86   Replicate_Wild_Ignore_Table: 
 87                    Last_Errno: 1007
 88                    Last_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
 89                  Skip_Counter: 0
 90           Exec_Master_Log_Pos: 194
 91               Relay_Log_Space: 1776
 92               Until_Condition: None
 93                Until_Log_File: 
 94                 Until_Log_Pos: 0
 95            Master_SSL_Allowed: No
 96            Master_SSL_CA_File: 
 97            Master_SSL_CA_Path: 
 98               Master_SSL_Cert: 
 99             Master_SSL_Cipher: 
100                Master_SSL_Key: 
101         Seconds_Behind_Master: NULL
102 Master_SSL_Verify_Server_Cert: No
103                 Last_IO_Errno: 0
104                 Last_IO_Error: 
105                Last_SQL_Errno: 1007
106                Last_SQL_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.
107   Replicate_Ignore_Server_Ids: 
108              Master_Server_Id: 1023308
109                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
110              Master_Info_File: /data/mysql/mysql3308/data/master.info
111                     SQL_Delay: 0
112           SQL_Remaining_Delay: NULL
113       Slave_SQL_Running_State: 
114            Master_Retry_Count: 86400
115                   Master_Bind: 
116       Last_IO_Error_Timestamp: 
117      Last_SQL_Error_Timestamp: 180809 10:18:58
118                Master_SSL_Crl: 
119            Master_SSL_Crlpath: 
120            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-24
121             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-19
122                 Auto_Position: 1
123          Replicate_Rewrite_DB: 
124                  Channel_Name: 
125            Master_TLS_Version: 
126 1 row in set (0.00 sec)
127 
128 //The error log shows below.
129 2018-08-09T10:15:45.368412+01:00 2 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=zlm4-relay-bin' to avoid this problem.
130 2018-08-09T10:15:45.382500+01:00 2 [Note] 'CHANGE MASTER TO FOR CHANNEL '' executed'. Previous state master_host='', master_port= 3306, master_log_file='', master_log_pos= 4, master_bind=''. New state master_host='192.168.1.102', master_port= 3308, master_log_file='', master_log_pos= 4, master_bind=''.
131 2018-08-09T10:18:58.164370+01:00 3 [Warning] Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information.
132 2018-08-09T10:18:58.173589+01:00 3 [Note] Slave I/O thread for channel '': connected to master 'repl@192.168.1.102:3308',replication started in log 'FIRST' at position 4
133 2018-08-09T10:18:58.180721+01:00 4 [Warning] Slave SQL for channel '': If a crash happens this configuration does not guarantee that the relay log info will be consistent, Error_code: 0
134 2018-08-09T10:18:58.180761+01:00 4 [Note] Slave SQL thread for channel '' initialized, starting replication in log 'FIRST' at position 0, relay log './zlm4-relay-bin.000001' position: 4
135 2018-08-09T10:18:58.202347+01:00 5 [ERROR] Slave SQL for channel '': Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350; Error 'Can't create database 'zlm'; database exists' on query. Default database: 'zlm'. Query: 'create database zlm', Error_code: 1007
136 2018-08-09T10:18:58.202651+01:00 4 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.000023' position 194
137 
138 //Check the "replication_applier_status_by_worker" table for detail.
139 (zlm@192.168.1.103 3308)[(none)]>select * from performance_schema.replication_applier_status_by_workerG
140 *************************** 1. row ***************************
141          CHANNEL_NAME: 
142             WORKER_ID: 1
143             THREAD_ID: NULL
144         SERVICE_STATE: OFF
145 LAST_SEEN_TRANSACTION: 42aada54-65ea-ee17-55f0-b47cf387c038:20
146     LAST_ERROR_NUMBER: 1007
147    LAST_ERROR_MESSAGE: Worker 1 failed executing transaction '42aada54-65ea-ee17-55f0-b47cf387c038:20' at master log mysql-bin.000023, end_log_pos 350; Error 'Can't create database 'zlm'; database exists' on query. Default database: 'zlm'. Query: 'create database zlm'
148  LAST_ERROR_TIMESTAMP: 2018-08-09 16:18:58
149 *************************** 2. row ***************************
150          CHANNEL_NAME: 
151             WORKER_ID: 2
152             THREAD_ID: NULL
153         SERVICE_STATE: OFF
154 LAST_SEEN_TRANSACTION: 
155     LAST_ERROR_NUMBER: 0
156    LAST_ERROR_MESSAGE: 
157  LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00
158 *************************** 3. row ***************************
159          CHANNEL_NAME: 
160             WORKER_ID: 3
161             THREAD_ID: NULL
162         SERVICE_STATE: OFF
163 LAST_SEEN_TRANSACTION: 
164     LAST_ERROR_NUMBER: 0
165    LAST_ERROR_MESSAGE: 
166  LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00
167 *************************** 4. row ***************************
168          CHANNEL_NAME: 
169             WORKER_ID: 4
170             THREAD_ID: NULL
171         SERVICE_STATE: OFF
172 LAST_SEEN_TRANSACTION: 
173     LAST_ERROR_NUMBER: 0
174    LAST_ERROR_MESSAGE: 
175  LAST_ERROR_TIMESTAMP: 0000-00-00 00:00:00
176 4 rows in set (0.00 sec)
177 
178 //Check the target database and table.
179 (zlm@192.168.1.103 3308)[(none)]>show databases;
180 +--------------------+
181 | Database           |
182 +--------------------+
183 | information_schema |
184 | mysql              |
185 | performance_schema |
186 | sys                |
187 | zlm                |
188 +--------------------+
189 5 rows in set (0.00 sec)
190 
191 (zlm@192.168.1.103 3308)[(none)]>use zlm
192 Reading table information for completion of table and column names
193 You can turn off this feature to get a quicker startup with -A
194 
195 Database changed
196 (zlm@192.168.1.103 3308)[zlm]>show tables;
197 +---------------+
198 | Tables_in_zlm |
199 +---------------+
200 | t1            |
201 +---------------+
202 1 row in set (0.00 sec)
203 
204 (zlm@192.168.1.103 3308)[zlm]>select * from t1;
205 +----+------------+
206 | id | name       |
207 +----+------------+
208 |  1 | MySQL      |
209 |  2 | Oracle     |
210 |  3 | PostgreSQL |
211 +----+------------+
212 3 rows in set (0.01 sec)
213 
214 //The changes on node zlm3 has been replicated to zlm4.
215 
216 [root@zlm4 10:35:51 /data/mysql/mysql3308/logs]
217 #ls -l
218 total 16
219 -rw-r----- 1 mysql mysql 194 Aug  9 08:00 mysql-bin.000024
220 -rw-r----- 1 mysql mysql 217 Aug  9 09:02 mysql-bin.000025
221 -rw-r----- 1 mysql mysql 194 Aug  9 10:08 mysql-bin.000026
222 -rw-r----- 1 mysql mysql 132 Aug  9 10:08 mysql-bin.index
223 
224 //No mysql-bin.000023 was found.Check the relay-log file.
225 [root@zlm4 10:38:16 /data/mysql/mysql3308/data]
226 #ls -l|grep relay
227 -rw-r----- 1 mysql mysql        58 Aug  9 10:18 relay-log.info
228 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.1
229 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.2
230 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.3
231 -rw-r----- 1 mysql mysql        84 Aug  9 10:18 worker-relay-log.info.4
232 -rw-r----- 1 mysql mysql       206 Aug  9 10:18 zlm4-relay-bin.000001
233 -rw-r----- 1 mysql mysql      1570 Aug  9 10:18 zlm4-relay-bin.000002
234 -rw-r----- 1 mysql mysql        48 Aug  9 10:18 zlm4-relay-bin.index
235 
236 [root@zlm4 10:38:30 /data/mysql/mysql3308/data]
237 #mysqlbinlog -v --base64-output=decode-rows zlm4-relay-bin.000002 > ~/02.log
238 
239 [root@zlm4 10:38:46 /data/mysql/mysql3308/data]
240 #cd
241 
242 [root@zlm4 10:38:49 ~]
243 #cat 02.log 
244 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
245 /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
246 DELIMITER /*!*/;
247 # at 4
248 #180809 10:18:58 server id 1033308  end_log_pos 123 CRC32 0x4367bb3e     Start: binlog v 4, server v 5.7.22-22-29.26-log created 180809 10:18:58
249 # This Format_description_event appears in a relay log and was generated by the slave thread.
250 # at 123
251 #180809 10:18:58 server id 1033308  end_log_pos 154 CRC32 0xf3605911     Previous-GTIDs
252 # [empty]
253 # at 154
254 #700101  1:00:00 server id 1023308  end_log_pos 0 CRC32 0xb5bcfbb7     Rotate to mysql-bin.000023  pos: 4
255 # at 201
256 #180809  4:09:22 server id 1023308  end_log_pos 123 CRC32 0x6f7e8565     Start: binlog v 4, server v 5.7.22-22-29.26-log created 180809  4:09:22 at startup
257 ROLLBACK/*!*/;
258 # at 320
259 #180809 10:18:58 server id 0  end_log_pos 367 CRC32 0xa757553d     Rotate to mysql-bin.000023  pos: 194
260 # at 367
261 #180809  9:07:52 server id 1023308  end_log_pos 259 CRC32 0x531076d3     GTID    last_committed=0    sequence_number=1    rbr_only=no
262 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:20'/*!*/;
263 # at 432
264 #180809  9:07:52 server id 1023308  end_log_pos 350 CRC32 0x9acb4e3f     Query    thread_id=5    exec_time=0    error_code=0
265 SET TIMESTAMP=1533798472/*!*/;
266 SET @@session.pseudo_thread_id=5/*!*/;
267 SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
268 SET @@session.sql_mode=1436549152/*!*/;
269 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
270 /*!C utf8 *//*!*/;
271 SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
272 SET @@session.lc_time_names=0/*!*/;
273 SET @@session.collation_database=DEFAULT/*!*/;
274 create database zlm
275 /*!*/;
276 # at 523
277 #180809  9:08:36 server id 1023308  end_log_pos 415 CRC32 0xde316a34     GTID    last_committed=1    sequence_number=2    rbr_only=no
278 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:21'/*!*/;
279 # at 588
280 #180809  9:08:36 server id 1023308  end_log_pos 557 CRC32 0xb29bd4ab     Query    thread_id=5    exec_time=0    error_code=0
281 use `zlm`/*!*/;
282 SET TIMESTAMP=1533798516/*!*/;
283 create table t1(
284 id int,
285 name char(10)
286 ) engine=innodb charset=utf8mb4
287 /*!*/;
288 # at 730
289 #180809  9:13:42 server id 1023308  end_log_pos 622 CRC32 0x2a5f6414     GTID    last_committed=2    sequence_number=3    rbr_only=no
290 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:22'/*!*/;
291 # at 795
292 #180809  9:13:42 server id 1023308  end_log_pos 728 CRC32 0xa803e3aa     Query    thread_id=5    exec_time=0    error_code=0
293 SET TIMESTAMP=1533798822/*!*/;
294 alter table t1 add primary key(id)
295 /*!*/;
296 # at 901
297 #180809  9:13:46 server id 1023308  end_log_pos 793 CRC32 0xfd677245     GTID    last_committed=3    sequence_number=4    rbr_only=yes
298 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;
299 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:23'/*!*/;
300 # at 966
301 #180809  9:13:46 server id 1023308  end_log_pos 869 CRC32 0x7b568d5a     Query    thread_id=5    exec_time=0    error_code=0
302 SET TIMESTAMP=1533798826/*!*/;
303 SET @@session.auto_increment_increment=2, @@session.auto_increment_offset=2/*!*/;
304 BEGIN
305 /*!*/;
306 # at 1042
307 # at 1128
308 #180809  9:13:46 server id 1023308  end_log_pos 1002 CRC32 0x8b4e5e6b     Table_map: `zlm`.`t1` mapped to number 110
309 # at 1175
310 #180809  9:13:46 server id 1023308  end_log_pos 1076 CRC32 0x51750bc0     Write_rows: table id 110 flags: STMT_END_F
311 ### INSERT INTO `zlm`.`t1`
312 ### SET
313 ###   @1=1
314 ###   @2='MySQL'
315 ### INSERT INTO `zlm`.`t1`
316 ### SET
317 ###   @1=2
318 ###   @2='Oracle'
319 ### INSERT INTO `zlm`.`t1`
320 ### SET
321 ###   @1=3
322 ###   @2='PostgreSQL'
323 # at 1249
324 #180809  9:13:46 server id 1023308  end_log_pos 1107 CRC32 0x6033f0ee     Xid = 26
325 COMMIT/*!*/;
326 # at 1280
327 #180809 10:12:07 server id 1023308  end_log_pos 1172 CRC32 0x66f4de8c     GTID    last_committed=4    sequence_number=5    rbr_only=no
328 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:24'/*!*/;
329 # at 1345
330 #180809 10:12:07 server id 1023308  end_log_pos 1397 CRC32 0x86665c03     Query    thread_id=8    exec_time=0    error_code=0
331 SET TIMESTAMP=1533802327/*!*/;
332 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
333 GRANT ALL PRIVILEGES ON *.* TO 'repl'@'192.168.1.%' IDENTIFIED WITH 'mysql_native_password' AS '*872ECE72A7EBAC6A183C90D7043D5F359BD85A9E'
334 /*!*/;
335 SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/;
336 DELIMITER ;
337 # End of log file
338 /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
339 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
340 
341 //Clean the value of variable "gtid_purged".
342 (zlm@192.168.1.103 3308)[(none)]>reset master;
343 Query OK, 0 rows affected (0.03 sec)
344 
345 (zlm@192.168.1.103 3308)[(none)]>set @@global.gtid_purged='42aada54-65ea-ee17-55f0-b47cf387c038:1-24';
346 Query OK, 0 rows affected (0.01 sec)
347 
348 (zlm@192.168.1.103 3308)[(none)]>start slave sql_thread;
349 Query OK, 0 rows affected (0.00 sec)
350 
351 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
352 *************************** 1. row ***************************
353                Slave_IO_State: Waiting for master to send event
354                   Master_Host: 192.168.1.102
355                   Master_User: repl
356                   Master_Port: 3308
357                 Connect_Retry: 60
358               Master_Log_File: mysql-bin.000023
359           Read_Master_Log_Pos: 1397
360                Relay_Log_File: zlm4-relay-bin.000002
361                 Relay_Log_Pos: 1570
362         Relay_Master_Log_File: mysql-bin.000023
363              Slave_IO_Running: Yes
364             Slave_SQL_Running: Yes
365               Replicate_Do_DB: 
366           Replicate_Ignore_DB: 
367            Replicate_Do_Table: 
368        Replicate_Ignore_Table: 
369       Replicate_Wild_Do_Table: 
370   Replicate_Wild_Ignore_Table: 
371                    Last_Errno: 0
372                    Last_Error: 
373                  Skip_Counter: 0
374           Exec_Master_Log_Pos: 1397
375               Relay_Log_Space: 1776
376               Until_Condition: None
377                Until_Log_File: 
378                 Until_Log_Pos: 0
379            Master_SSL_Allowed: No
380            Master_SSL_CA_File: 
381            Master_SSL_CA_Path: 
382               Master_SSL_Cert: 
383             Master_SSL_Cipher: 
384                Master_SSL_Key: 
385         Seconds_Behind_Master: 0
386 Master_SSL_Verify_Server_Cert: No
387                 Last_IO_Errno: 0
388                 Last_IO_Error: 
389                Last_SQL_Errno: 0
390                Last_SQL_Error: 
391   Replicate_Ignore_Server_Ids: 
392              Master_Server_Id: 1023308
393                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
394              Master_Info_File: /data/mysql/mysql3308/data/master.info
395                     SQL_Delay: 0
396           SQL_Remaining_Delay: NULL
397       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
398            Master_Retry_Count: 86400
399                   Master_Bind: 
400       Last_IO_Error_Timestamp: 
401      Last_SQL_Error_Timestamp: 
402                Master_SSL_Crl: 
403            Master_SSL_Crlpath: 
404            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-24
405             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-24
406                 Auto_Position: 1
407          Replicate_Rewrite_DB: 
408                  Channel_Name: 
409            Master_TLS_Version: 
410 1 row in set (0.00 sec)

 

Insert a new record in table "t1" on node zlm3.

 1 (root@localhost mysql3308.sock)[(none)]>use zlm
 2 Reading table information for completion of table and column names
 3 You can turn off this feature to get a quicker startup with -A
 4 
 5 Database changed
 6 (root@localhost mysql3308.sock)[zlm]>insert into t1 values(4,'Redis');
 7 Query OK, 1 row affected (0.01 sec)
 8 
 9 (root@localhost mysql3308.sock)[zlm]>select * from t1;
10 +----+------------+
11 | id | name       |
12 +----+------------+
13 |  1 | MySQL      |
14 |  2 | Oracle     |
15 |  3 | PostgreSQL |
16 |  4 | Redis      |
17 +----+------------+
18 4 rows in set (0.00 sec)

 

**Stop slave and check the value of  "Relay_Master_Log_File**","**Exec_Master_Log_Pos**" and "**Retrieved_Gtid_Set*美高梅4858官方网站,美高梅网站是多少,*".**

 

 1 (zlm@192.168.1.103 3308)[(none)]>stop slave;
 2 Query OK, 0 rows affected (0.01 sec)
 3 
 4 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
 5 *************************** 1. row ***************************
 6                Slave_IO_State: 
 7                   Master_Host: 192.168.1.102
 8                   Master_User: repl
 9                   Master_Port: 3308
10                 Connect_Retry: 60
11               Master_Log_File: mysql-bin.000023
12           Read_Master_Log_Pos: 1718
13                Relay_Log_File: zlm4-relay-bin.000003
14                 Relay_Log_Pos: 775
15         Relay_Master_Log_File: mysql-bin.000023 //This binlog file is which one we need to analyze later on master node zlm3.
16              Slave_IO_Running: No
17             Slave_SQL_Running: No
18               Replicate_Do_DB: 
19           Replicate_Ignore_DB: 
20            Replicate_Do_Table: 
21        Replicate_Ignore_Table: 
22       Replicate_Wild_Do_Table: 
23   Replicate_Wild_Ignore_Table: 
24                    Last_Errno: 0
25                    Last_Error: 
26                  Skip_Counter: 0
27           Exec_Master_Log_Pos: 1718 //This position is where we need to set the Xid.
28               Relay_Log_Space: 2397
29               Until_Condition: None
30                Until_Log_File: 
31                 Until_Log_Pos: 0
32            Master_SSL_Allowed: No
33            Master_SSL_CA_File: 
34            Master_SSL_CA_Path: 
35               Master_SSL_Cert: 
36             Master_SSL_Cipher: 
37                Master_SSL_Key: 
38         Seconds_Behind_Master: NULL
39 Master_SSL_Verify_Server_Cert: No
40                 Last_IO_Errno: 0
41                 Last_IO_Error: 
42                Last_SQL_Errno: 0
43                Last_SQL_Error: 
44   Replicate_Ignore_Server_Ids: 
45              Master_Server_Id: 1023308
46                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
47              Master_Info_File: /data/mysql/mysql3308/data/master.info
48                     SQL_Delay: 0
49           SQL_Remaining_Delay: NULL
50       Slave_SQL_Running_State: 
51            Master_Retry_Count: 86400
52                   Master_Bind: 
53       Last_IO_Error_Timestamp: 
54      Last_SQL_Error_Timestamp: 
55                Master_SSL_Crl: 
56            Master_SSL_Crlpath: 
57            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-25
58             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-25
59                 Auto_Position: 1
60          Replicate_Rewrite_DB: 
61                  Channel_Name: 
62            Master_TLS_Version: 
63 1 row in set (0.00 sec)

 

Analyze the binlog file we get above(here is mysql-bin.000023).

  1 [root@zlm3 10:54:51 /data/mysql/mysql3308/logs]
  2 #mysqlbinlog -v --base64-output=decode-rows mysql-bin.000023 > ~/23.log
  3 
  4 [root@zlm3 10:55:27 /data/mysql/mysql3308/logs]
  5 #cat ~/23.log
  6 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
  7 /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
  8 DELIMITER /*!*/;
  9 # at 4
 10 #180809  4:09:22 server id 1023308  end_log_pos 123 CRC32 0x6f7e8565     Start: binlog v 4, server v 5.7.22-22-29.26-log created 180809  4:09:22 at startup
 11 # Warning: this binlog is either in use or was not closed properly.
 12 ROLLBACK/*!*/;
 13 # at 123
 14 #180809  4:09:22 server id 1023308  end_log_pos 194 CRC32 0x43a7c3b7     Previous-GTIDs
 15 # 42aada54-65ea-ee17-55f0-b47cf387c038:1-19
 16 # at 194
 17 #180809  9:07:52 server id 1023308  end_log_pos 259 CRC32 0x531076d3     GTID    last_committed=0    sequence_number=1    rbr_only=no
 18 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:20'/*!*/;
 19 # at 259
 20 #180809  9:07:52 server id 1023308  end_log_pos 350 CRC32 0x9acb4e3f     Query    thread_id=5    exec_time=0    error_code=0
 21 SET TIMESTAMP=1533798472/*!*/;
 22 SET @@session.pseudo_thread_id=5/*!*/;
 23 SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
 24 SET @@session.sql_mode=1436549152/*!*/;
 25 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 26 /*!C utf8 *//*!*/;
 27 SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
 28 SET @@session.lc_time_names=0/*!*/;
 29 SET @@session.collation_database=DEFAULT/*!*/;
 30 create database zlm
 31 /*!*/;
 32 # at 350
 33 #180809  9:08:36 server id 1023308  end_log_pos 415 CRC32 0xde316a34     GTID    last_committed=1    sequence_number=2    rbr_only=no
 34 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:21'/*!*/;
 35 # at 415
 36 #180809  9:08:36 server id 1023308  end_log_pos 557 CRC32 0xb29bd4ab     Query    thread_id=5    exec_time=0    error_code=0
 37 use `zlm`/*!*/;
 38 SET TIMESTAMP=1533798516/*!*/;
 39 create table t1(
 40 id int,
 41 name char(10)
 42 ) engine=innodb charset=utf8mb4
 43 /*!*/;
 44 # at 557
 45 #180809  9:13:42 server id 1023308  end_log_pos 622 CRC32 0x2a5f6414     GTID    last_committed=2    sequence_number=3    rbr_only=no
 46 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:22'/*!*/;
 47 # at 622
 48 #180809  9:13:42 server id 1023308  end_log_pos 728 CRC32 0xa803e3aa     Query    thread_id=5    exec_time=0    error_code=0
 49 SET TIMESTAMP=1533798822/*!*/;
 50 alter table t1 add primary key(id)
 51 /*!*/;
 52 # at 728
 53 #180809  9:13:46 server id 1023308  end_log_pos 793 CRC32 0xfd677245     GTID    last_committed=3    sequence_number=4    rbr_only=yes
 54 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;
 55 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:23'/*!*/;
 56 # at 793
 57 #180809  9:13:46 server id 1023308  end_log_pos 869 CRC32 0x7b568d5a     Query    thread_id=5    exec_time=0    error_code=0
 58 SET TIMESTAMP=1533798826/*!*/;
 59 SET @@session.auto_increment_increment=2, @@session.auto_increment_offset=2/*!*/;
 60 BEGIN
 61 /*!*/;
 62 # at 869
 63 # at 955
 64 #180809  9:13:46 server id 1023308  end_log_pos 1002 CRC32 0x8b4e5e6b     Table_map: `zlm`.`t1` mapped to number 110
 65 # at 1002
 66 #180809  9:13:46 server id 1023308  end_log_pos 1076 CRC32 0x51750bc0     Write_rows: table id 110 flags: STMT_END_F
 67 ### INSERT INTO `zlm`.`t1`
 68 ### SET
 69 ###   @1=1
 70 ###   @2='MySQL'
 71 ### INSERT INTO `zlm`.`t1`
 72 ### SET
 73 ###   @1=2
 74 ###   @2='Oracle'
 75 ### INSERT INTO `zlm`.`t1`
 76 ### SET
 77 ###   @1=3
 78 ###   @2='PostgreSQL'
 79 # at 1076
 80 #180809  9:13:46 server id 1023308  end_log_pos 1107 CRC32 0x6033f0ee     Xid = 26
 81 COMMIT/*!*/;
 82 # at 1107
 83 #180809 10:12:07 server id 1023308  end_log_pos 1172 CRC32 0x66f4de8c     GTID    last_committed=4    sequence_number=5    rbr_only=no
 84 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:24'/*!*/;
 85 # at 1172
 86 #180809 10:12:07 server id 1023308  end_log_pos 1397 CRC32 0x86665c03     Query    thread_id=8    exec_time=0    error_code=0
 87 SET TIMESTAMP=1533802327/*!*/;
 88 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 89 GRANT ALL PRIVILEGES ON *.* TO 'repl'@'192.168.1.%' IDENTIFIED WITH 'mysql_native_password' AS '*872ECE72A7EBAC6A183C90D7043D5F359BD85A9E'
 90 /*!*/;
 91 # at 1397
 92 #180809 10:50:26 server id 1023308  end_log_pos 1462 CRC32 0x9e027e44     GTID    last_committed=5    sequence_number=6    rbr_only=yes
 93 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/;
 94 SET @@SESSION.GTID_NEXT= '42aada54-65ea-ee17-55f0-b47cf387c038:25'/*!*/;
 95 # at 1462
 96 #180809 10:50:26 server id 1023308  end_log_pos 1538 CRC32 0xe5d003cf     Query    thread_id=8    exec_time=0    error_code=0
 97 SET TIMESTAMP=1533804626/*!*/;
 98 SET @@session.auto_increment_increment=2, @@session.auto_increment_offset=2/*!*/;
 99 BEGIN
100 /*!*/;
101 # at 1538
102 # at 1594
103 #180809 10:50:26 server id 1023308  end_log_pos 1641 CRC32 0x81684c91     Table_map: `zlm`.`t1` mapped to number 110
104 # at 1641
105 #180809 10:50:26 server id 1023308  end_log_pos 1687 CRC32 0x19b42ee8     Write_rows: table id 110 flags: STMT_END_F
106 ### INSERT INTO `zlm`.`t1`
107 ### SET
108 ###   @1=4
109 ###   @2='Redis'
110 # at 1687
111 #180809 10:50:26 server id 1023308  end_log_pos 1718 CRC32 0x3429fa99     Xid = 28
112 COMMIT/*!*/;
113 SET @@SESSION.GTID_NEXT= 'AUTOMATIC' /* added by mysqlbinlog */ /*!*/;
114 DELIMITER ;
115 # End of log file
116 /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
117 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
118 
119 [root@zlm3 11:00:48 /data/mysql/mysql3308/logs]
120 #ls -l
121 total 12
122 -rw-r----- 1 mysql mysql  194 Aug  9 04:09 mysql-bin.000022
123 -rw-r----- 1 mysql mysql 1718 Aug  9 10:50 mysql-bin.000023 //The 1718 bytes is right the position we need to decide which Xid we should set.
124 -rw-r----- 1 mysql mysql   88 Aug  9 04:09 mysql-bin.index
125 
126 //As there're no other transactions found in mysql-bin.000023.The last "Xid = 28" is what we need to set on node zlm4.

 

Modify the grastate.dat file on node zlm4(if not exist,touch a new file of it).

 1 [root@zlm4 11:07:38 /data/mysql/mysql3308/data]
 2 #vim grastate.dat
 3 
 4 [root@zlm4 11:08:01 /data/mysql/mysql3308/data]
 5 #cat grastate.dat 
 6 #cat grastate.dat
 7 # GALERA saved state
 8 version: 2.1
 9 uuid:    bd5525ab-9a15-11e8-aa0f-4b830c783fc7
10 seqno:   28
11 safe_to_bootstrap: 0
12 
13 [root@zlm4 11:08:42 /data/mysql/mysql3308/data]
14 #ls -l|grep grastate.dat 
15 -rw-r--r-- 1 root  root        131 Aug  9 11:08 grastate.dat
16 
17 [root@zlm4 11:08:03 /data/mysql/mysql3308/data]
18 #chown mysql.mysql grastate.dat 
19 
20 [root@zlm4 11:08:11 /data/mysql/mysql3308/data]
21 #ls -l|grep grastate.dat 
22 -rw-r--r-- 1 mysql mysql       131 Aug  9 11:08 grastate.dat

 

Modify the my3308.cnf file to restore the parameter of PXC.

 1 [root@zlm4 11:10:28 /data/mysql/mysql3308]
 2 #vim my3308.cnf 
 3 
 4 [root@zlm4 11:11:03 /data/mysql/mysql3308]
 5 #cat my3308.cnf |grep wsrep
 6 loose-wsrep_cluster_name=pxc_wubx 
 7 loose-wsrep_cluster_address=gcomm://192.168.1.101,192.168.1.102,192.168.1.103
 8 loose-wsrep_node_address=192.168.1.103
 9 loose-wsrep_provider=/usr/local/mysql/lib/libgalera_smm.so
10 #loose-wsrep_sst_method=xtrabackup-v2
11 loose-wsrep_sst_method=rsync
12 loose-wsrep_sst_auth=sst:zlmzlm
13 #loose-wsrep_debug=on
14 #loose-wsrep_provider_options="debug=on"

 

**Startup the mysqld on node zlm4.**

  1 [root@zlm4 11:17:09 /data/mysql/mysql3308]
  2 #!ps
  3 ps aux|grep mysqld
  4 mysql     6514 12.0 19.1 1256144 194664 pts/3  Dl   11:17   0:00 mysqld --defaults-file=/data/mysql/mysql3308/my3308.cnf
  5 root      6539  0.0  0.0 112640   960 pts/3    R+   11:17   0:00 grep --color=auto mysqld
  6 
  7 //Check the error log for detail.
  8 [root@zlm4 11:17:01 /data/mysql/mysql3308/data]
  9 #tail -f error.log 
 10 
 11 2018-08-09T11:17:09.518383+01:00 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
 12 2018-08-09T11:17:09.519740+01:00 0 [Warning] Insecure configuration for --secure-file-priv: Location is accessible to all OS users. Consider choosing a different directory.
 13 2018-08-09T11:17:09.519805+01:00 0 [Note] mysqld (mysqld 5.7.22-22-29.26-log) starting as process 6514 ...
 14 2018-08-09T11:17:09.522792+01:00 0 [Note] WSREP: Setting wsrep_ready to false
 15 2018-08-09T11:17:09.522812+01:00 0 [Note] WSREP: No pre-stored wsrep-start position found. Skipping position initialization.
 16 2018-08-09T11:17:09.522818+01:00 0 [Note] WSREP: wsrep_load(): loading provider library '/usr/local/mysql/lib/libgalera_smm.so'
 17 2018-08-09T11:17:09.528196+01:00 0 [Note] WSREP: wsrep_load(): Galera 3.26(r) by Codership Oy <info@codership.com> loaded successfully.
 18 2018-08-09T11:17:09.528328+01:00 0 [Note] WSREP: CRC-32C: using hardware acceleration.
 19 2018-08-09T11:17:09.528860+01:00 0 [Note] WSREP: Found saved state: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28, safe_to_bootstrap: 0
 20 2018-08-09T11:17:09.534206+01:00 0 [Note] WSREP: Passing config to GCS: base_dir = /data/mysql/mysql3308/data/; base_host = 192.168.1.103; base_port = 4567; cert.log_conflicts = no; debug = no; evs.auto_evict = 0; evs.delay_margin = PT1S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT0.5S; evs.inactive_timeout = PT15S; evs.join_retrans_period = PT1S; evs.max_install_timeouts = 3; evs.send_window = 10; evs.stats_report_period = PT1M; evs.suspect_timeout = PT5S; evs.user_send_window = 4; evs.view_forget_timeout = PT24H; gcache.dir = /data/mysql/mysql3308/data/; gcache.freeze_purge_at_seqno = -1; gcache.keep_pages_count = 0; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /data/mysql/mysql3308/data//galera.cache; gcache.page_size = 128M; gcache.recover = no; gcache.size = 128M; gcomm.thread_prio = ; gcs.fc_debug = 0; gcs.fc_factor = 1; gcs.fc_limit = 100; gcs.fc_master_slave = no; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = no; gmcast.segment = 0; gmcast.version = 0; pc.announce_timeout = PT3S; pc.checksum = false; pc.ignore_quorum = false; pc.ignore_sb = false; pc.npvo = false; pc.recovery = 1; pc.version = 0; pc.wait_prim = true; pc.wait_prim_timeout = PT30S; pc.weight = 1; protonet.backend = asio; protonet.version = 0; repl.causal_read_timeout = PT30S; repl.commit_order = 3; repl.key_format = FLAT8; repl.max_ws_size = 2147483647; repl.proto_max = 8; socket.checksum = 2; socket.recv_buf_size = 212992; 
 21 2018-08-09T11:17:09.547103+01:00 0 [Note] WSREP: GCache history reset: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:0 -> bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28
 22 2018-08-09T11:17:09.551477+01:00 0 [Note] WSREP: Assign initial position for certification: 28, protocol version: -1
 23 2018-08-09T11:17:09.551517+01:00 0 [Note] WSREP: Preparing to initiate SST/IST
 24 2018-08-09T11:17:09.551524+01:00 0 [Note] WSREP: Starting replication
 25 2018-08-09T11:17:09.551542+01:00 0 [Note] WSREP: Setting initial position to bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28
 26 2018-08-09T11:17:09.551666+01:00 0 [Note] WSREP: Using CRC-32C for message checksums.
 27 2018-08-09T11:17:09.551752+01:00 0 [Note] WSREP: gcomm thread scheduling priority set to other:0 
 28 2018-08-09T11:17:09.551861+01:00 0 [Warning] WSREP: Fail to access the file (/data/mysql/mysql3308/data//gvwstate.dat) error (No such file or directory). It is possible if node is booting for first time or re-booting after a graceful shutdown
 29 2018-08-09T11:17:09.551870+01:00 0 [Note] WSREP: Restoring primary-component from disk failed. Either node is booting for first time or re-booting after a graceful shutdown
 30 2018-08-09T11:17:09.552488+01:00 0 [Note] WSREP: GMCast version 0
 31 2018-08-09T11:17:09.553245+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') listening at tcp://0.0.0.0:4567
 32 2018-08-09T11:17:09.553297+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') multicast: , ttl: 1
 33 2018-08-09T11:17:09.553883+01:00 0 [Note] WSREP: EVS version 0
 34 2018-08-09T11:17:09.554031+01:00 0 [Note] WSREP: gcomm: connecting to group 'pxc_wubx', peer '192.168.1.101:,192.168.1.102:,192.168.1.103:'
 35 2018-08-09T11:17:09.555884+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') connection established to fe2c0efc tcp://192.168.1.103:4567
 36 2018-08-09T11:17:09.555917+01:00 0 [Warning] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') address 'tcp://192.168.1.103:4567' points to own listening address, blacklisting
 37 2018-08-09T11:17:09.557320+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') connection established to 13eae368 tcp://192.168.1.101:4567
 38 2018-08-09T11:17:09.557398+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') turning message relay requesting on, nonlive peers: 
 39 2018-08-09T11:17:09.558019+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') connection established to 23fb8f7a tcp://192.168.1.102:4567
 40 2018-08-09T11:17:09.789760+01:00 0 [Note] WSREP: declaring 13eae368 at tcp://192.168.1.101:4567 stable
 41 2018-08-09T11:17:09.789795+01:00 0 [Note] WSREP: declaring 23fb8f7a at tcp://192.168.1.102:4567 stable
 42 2018-08-09T11:17:10.791694+01:00 0 [Note] WSREP: Node 13eae368 state primary
 43 2018-08-09T11:17:10.793677+01:00 0 [Note] WSREP: Current view of cluster as seen by this node
 44 view (view_id(PRIM,13eae368,15)
 45 memb {
 46     13eae368,0
 47     23fb8f7a,0
 48     fe2c0efc,0
 49     }
 50 joined {
 51     }
 52 left {
 53     }
 54 partitioned {
 55     }
 56 )
 57 2018-08-09T11:17:10.793720+01:00 0 [Note] WSREP: Save the discovered primary-component to disk
 58 2018-08-09T11:17:11.055114+01:00 0 [Note] WSREP: gcomm: connected
 59 2018-08-09T11:17:11.055201+01:00 0 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)
 60 2018-08-09T11:17:11.055278+01:00 0 [Note] WSREP: Waiting for SST/IST to complete.
 61 2018-08-09T11:17:11.055571+01:00 0 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 2, memb_num = 3
 62 2018-08-09T11:17:11.055600+01:00 0 [Note] WSREP: STATE EXCHANGE: Waiting for state UUID.
 63 2018-08-09T11:17:11.055637+01:00 0 [Note] WSREP: STATE EXCHANGE: sent state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99
 64 2018-08-09T11:17:11.055645+01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99 from 0 (zlm2)
 65 2018-08-09T11:17:11.055653+01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99 from 1 (zlm3)
 66 2018-08-09T11:17:11.061999+01:00 0 [Note] WSREP: STATE EXCHANGE: got state msg: fee39480-9bb4-11e8-a6f3-7b3d75fc5b99 from 2 (zlm4)
 67 2018-08-09T11:17:11.062036+01:00 0 [Note] WSREP: Quorum results:
 68     version    = 4,
 69     component  = PRIMARY,
 70     conf_id    = 14,
 71     members    = 3/3 (primary/total),
 72     act_id     = 28,
 73     last_appl. = -1,
 74     protocols  = 0/8/3 (gcs/repl/appl),
 75     group UUID = bd5525ab-9a15-11e8-aa0f-4b830c783fc7
 76 2018-08-09T11:17:11.062046+01:00 0 [Note] WSREP: Flow-control interval: [173, 173]
 77 2018-08-09T11:17:11.062050+01:00 0 [Note] WSREP: Trying to continue unpaused monitor
 78 2018-08-09T11:17:11.062055+01:00 0 [Note] WSREP: Restored state OPEN -> JOINED (28)
 79 2018-08-09T11:17:11.062282+01:00 2 [Note] WSREP: REPL Protocols: 8 (3, 2)
 80 2018-08-09T11:17:11.062308+01:00 2 [Note] WSREP: New cluster view: global state: bd5525ab-9a15-11e8-aa0f-4b830c783fc7:28, view# 15: Primary, number of nodes: 3, my index: 2, protocol version 3
 81 2018-08-09T11:17:11.062314+01:00 2 [Note] WSREP: Setting wsrep_ready to true
 82 2018-08-09T11:17:11.062329+01:00 0 [Note] WSREP: SST complete, seqno: 28
 83 2018-08-09T11:17:11.063803+01:00 0 [Note] WSREP: Member 2.0 (zlm4) synced with group.
 84 2018-08-09T11:17:11.063831+01:00 0 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 28)
 85 2018-08-09T11:17:11.066318+01:00 0 [Warning] InnoDB: Using innodb_locks_unsafe_for_binlog is DEPRECATED. This option may be removed in future releases. Please use READ COMMITTED transaction isolation level instead; Please refer to http://dev.mysql.com/doc/refman/5.7/en/set-transaction.html
 86 2018-08-09T11:17:11.066413+01:00 0 [Note] InnoDB: PUNCH HOLE support available
 87 2018-08-09T11:17:11.066426+01:00 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
 88 2018-08-09T11:17:11.066439+01:00 0 [Note] InnoDB: Uses event mutexes
 89 2018-08-09T11:17:11.066444+01:00 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
 90 2018-08-09T11:17:11.066448+01:00 0 [Note] InnoDB: Compressed tables use zlib 1.2.7
 91 2018-08-09T11:17:11.066453+01:00 0 [Note] InnoDB: Using Linux native AIO
 92 2018-08-09T11:17:11.066471+01:00 0 [Note] InnoDB: Adjusting innodb_buffer_pool_instances from 4 to 1 since innodb_buffer_pool_size is less than 1024 MiB
 93 2018-08-09T11:17:11.067081+01:00 0 [Note] InnoDB: Number of pools: 1
 94 2018-08-09T11:17:11.067235+01:00 0 [Note] InnoDB: Using CPU crc32 instructions
 95 2018-08-09T11:17:11.068926+01:00 0 [Note] InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M
 96 2018-08-09T11:17:11.071673+01:00 0 [Note] InnoDB: Completed initialization of buffer pool
 97 2018-08-09T11:17:11.074414+01:00 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
 98 2018-08-09T11:17:11.093895+01:00 0 [Note] InnoDB: Crash recovery did not find the parallel doublewrite buffer at /data/mysql/mysql3308/data/xb_doublewrite
 99 2018-08-09T11:17:11.095767+01:00 0 [Note] InnoDB: Highest supported file format is Barracuda.
100 2018-08-09T11:17:11.229162+01:00 0 [Note] InnoDB: Created parallel doublewrite buffer at /data/mysql/mysql3308/data/xb_doublewrite, size 3932160 bytes
101 2018-08-09T11:17:11.369285+01:00 0 [Note] InnoDB: Creating shared tablespace for temporary tables
102 2018-08-09T11:17:11.369369+01:00 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
103 2018-08-09T11:17:11.773899+01:00 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
104 2018-08-09T11:17:11.774714+01:00 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
105 2018-08-09T11:17:11.774734+01:00 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
106 2018-08-09T11:17:11.775107+01:00 0 [Note] InnoDB: Waiting for purge to start
107 2018-08-09T11:17:11.845618+01:00 0 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.7.22-rel22 started; log sequence number 2641145
108 2018-08-09T11:17:11.845884+01:00 0 [Note] Plugin 'FEDERATED' is disabled.
109 2018-08-09T11:17:11.848626+01:00 0 [Note] InnoDB: Loading buffer pool(s) from /data/mysql/mysql3308/data/ib_buffer_pool
110 2018-08-09T11:17:11.882535+01:00 0 [Note] InnoDB: Buffer pool(s) load completed at 180809 11:17:11
111 2018-08-09T11:17:11.907836+01:00 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
112 2018-08-09T11:17:11.907856+01:00 0 [Note] Skipping generation of SSL certificates as certificate files are present in data directory.
113 2018-08-09T11:17:11.908353+01:00 0 [Warning] CA certificate ca.pem is self signed.
114 2018-08-09T11:17:11.908405+01:00 0 [Note] Skipping generation of RSA key pair as key files are present in data directory.
115 2018-08-09T11:17:11.908482+01:00 0 [Note] Server hostname (bind-address): '*'; port: 3308
116 2018-08-09T11:17:11.908505+01:00 0 [Note] IPv6 is available.
117 2018-08-09T11:17:11.908513+01:00 0 [Note]   - '::' resolves to '::';
118 2018-08-09T11:17:11.908527+01:00 0 [Note] Server socket created on IP: '::'.
119 2018-08-09T11:17:11.910446+01:00 0 [Warning] 'user' entry 'root@localhost' ignored in --skip-name-resolve mode.
120 2018-08-09T11:17:11.910481+01:00 0 [Warning] 'user' entry 'mysql.session@localhost' ignored in --skip-name-resolve mode.
121 2018-08-09T11:17:11.910489+01:00 0 [Warning] 'user' entry 'mysql.sys@localhost' ignored in --skip-name-resolve mode.
122 2018-08-09T11:17:11.910495+01:00 0 [Warning] 'user' entry 'sst@localhost' ignored in --skip-name-resolve mode.
123 2018-08-09T11:17:11.910512+01:00 0 [Warning] 'db' entry 'performance_schema mysql.session@localhost' ignored in --skip-name-resolve mode.
124 2018-08-09T11:17:11.910516+01:00 0 [Warning] 'db' entry 'sys mysql.sys@localhost' ignored in --skip-name-resolve mode.
125 2018-08-09T11:17:11.910522+01:00 0 [Warning] 'proxies_priv' entry '@ root@localhost' ignored in --skip-name-resolve mode.
126 2018-08-09T11:17:11.911126+01:00 0 [Warning] 'tables_priv' entry 'user mysql.session@localhost' ignored in --skip-name-resolve mode.
127 2018-08-09T11:17:11.911142+01:00 0 [Warning] 'tables_priv' entry 'sys_config mysql.sys@localhost' ignored in --skip-name-resolve mode.
128 2018-08-09T11:17:11.913579+01:00 0 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=zlm4-relay-bin' to avoid this problem.
129 2018-08-09T11:17:11.925857+01:00 0 [Note] Event Scheduler: Loaded 0 events
130 2018-08-09T11:17:11.926371+01:00 0 [Note] mysqld: ready for connections.
131 Version: '5.7.22-22-29.26-log'  socket: '/tmp/mysql3308.sock'  port: 3308  Percona XtraDB Cluster binary (GPL) 5.7.22-29.26, Revision da86071, wsrep_29.26
132 2018-08-09T11:17:11.930200+01:00 2 [Note] WSREP: Initialized wsrep sidno 2
133 2018-08-09T11:17:11.930223+01:00 2 [Note] WSREP: Auto Increment Offset/Increment re-align with cluster membership change (Offset: 1 -> 3) (Increment: 1 -> 3)
134 2018-08-09T11:17:11.930233+01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
135 2018-08-09T11:17:11.930250+01:00 2 [Note] WSREP: Assign initial position for certification: 28, protocol version: 3
136 2018-08-09T11:17:11.930317+01:00 0 [Note] WSREP: Service thread queue flushed.
137 2018-08-09T11:17:11.930499+01:00 2 [Note] WSREP: Synchronized with group, ready for connections
138 2018-08-09T11:17:11.930505+01:00 2 [Note] WSREP: Setting wsrep_ready to true
139 2018-08-09T11:17:11.930507+01:00 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
140 2018-08-09T11:17:13.056460+01:00 0 [Note] WSREP: (fe2c0efc, 'tcp://0.0.0.0:4567') turning message relay requesting off

 

**Check the status of PXC and the data of table t1.**

 1 (zlm@192.168.1.103 3308)[(none)]>show global status like '%wsrep%';
 2 +----------------------------------+----------------------------------------------------------+
 3 | Variable_name                    | Value                                                    |
 4 +----------------------------------+----------------------------------------------------------+
 5 | wsrep_local_state_uuid           | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
 6 | wsrep_protocol_version           | 8                                                        |
 7 | wsrep_last_applied               | 28                                                       |
 8 | wsrep_last_committed             | 28                                                       |
 9 | wsrep_replicated                 | 0                                                        |
10 | wsrep_replicated_bytes           | 0                                                        |
11 | wsrep_repl_keys                  | 0                                                        |
12 | wsrep_repl_keys_bytes            | 0                                                        |
13 | wsrep_repl_data_bytes            | 0                                                        |
14 | wsrep_repl_other_bytes           | 0                                                        |
15 | wsrep_received                   | 2                                                        |
16 | wsrep_received_bytes             | 279                                                      |
17 | wsrep_local_commits              | 0                                                        |
18 | wsrep_local_cert_failures        | 0                                                        |
19 | wsrep_local_replays              | 0                                                        |
20 | wsrep_local_send_queue           | 0                                                        |
21 | wsrep_local_send_queue_max       | 1                                                        |
22 | wsrep_local_send_queue_min       | 0                                                        |
23 | wsrep_local_send_queue_avg       | 0.000000                                                 |
24 | wsrep_local_recv_queue           | 0                                                        |
25 | wsrep_local_recv_queue_max       | 1                                                        |
26 | wsrep_local_recv_queue_min       | 0                                                        |
27 | wsrep_local_recv_queue_avg       | 0.000000                                                 |
28 | wsrep_local_cached_downto        | 0                                                        |
29 | wsrep_flow_control_paused_ns     | 0                                                        |
30 | wsrep_flow_control_paused        | 0.000000                                                 |
31 | wsrep_flow_control_sent          | 0                                                        |
32 | wsrep_flow_control_recv          | 0                                                        |
33 | wsrep_flow_control_interval      | [ 173, 173 ]                                             |
34 | wsrep_flow_control_interval_low  | 173                                                      |
35 | wsrep_flow_control_interval_high | 173                                                      |
36 | wsrep_flow_control_status        | OFF                                                      |
37 | wsrep_cert_deps_distance         | 0.000000                                                 |
38 | wsrep_apply_oooe                 | 0.000000                                                 |
39 | wsrep_apply_oool                 | 0.000000                                                 |
40 | wsrep_apply_window               | 0.000000                                                 |
41 | wsrep_commit_oooe                | 0.000000                                                 |
42 | wsrep_commit_oool                | 0.000000                                                 |
43 | wsrep_commit_window              | 0.000000                                                 |
44 | wsrep_local_state                | 4                                                        |
45 | wsrep_local_state_comment        | Synced                                                   |
46 | wsrep_cert_index_size            | 0                                                        |
47 | wsrep_cert_bucket_count          | 22                                                       |
48 | wsrep_gcache_pool_size           | 1320                                                     |
49 | wsrep_causal_reads               | 0                                                        |
50 | wsrep_cert_interval              | 0.000000                                                 |
51 | wsrep_ist_receive_status         |                                                          |
52 | wsrep_ist_receive_seqno_start    | 0                                                        |
53 | wsrep_ist_receive_seqno_current  | 0                                                        |
54 | wsrep_ist_receive_seqno_end      | 0                                                        |
55 | wsrep_incoming_addresses         | 192.168.1.101:3308,192.168.1.102:3308,192.168.1.103:3308 |
56 | wsrep_desync_count               | 0                                                        |
57 | wsrep_evs_delayed                |                                                          |
58 | wsrep_evs_evict_list             |                                                          |
59 | wsrep_evs_repl_latency           | 0/0/0/0/0                                                |
60 | wsrep_evs_state                  | OPERATIONAL                                              |
61 | wsrep_gcomm_uuid                 | fe2c0efc-9bb4-11e8-82b0-6b01a1a0030d                     |
62 | wsrep_cluster_conf_id            | 15                                                       |
63 | wsrep_cluster_size               | 3                                                        | //The size of PXC turned out to be three again.
64 | wsrep_cluster_state_uuid         | bd5525ab-9a15-11e8-aa0f-4b830c783fc7                     |
65 | wsrep_cluster_status             | Primary                                                  |
66 | wsrep_connected                  | ON                                                       |
67 | wsrep_local_bf_aborts            | 0                                                        |
68 | wsrep_local_index                | 2                                                        |
69 | wsrep_provider_name              | Galera                                                   |
70 | wsrep_provider_vendor            | Codership Oy <info@codership.com>                        |
71 | wsrep_provider_version           | 3.26(r)                                                  |
72 | wsrep_ready                      | ON                                                       |
73 +----------------------------------+----------------------------------------------------------+
74 68 rows in set (0.00 sec)
75 
76 (zlm@192.168.1.103 3308)[(none)]>select * from zlm.t1;
77 +----+------------+
78 | id | name       |
79 +----+------------+
80 |  1 | MySQL      |
81 |  2 | Oracle     |
82 |  3 | PostgreSQL |
83 |  4 | Redis      |
84 +----+------------+
85 4 rows in set (0.01 sec)
86 
87 //The fourth record of "Redis" has been shown correctly on node zlm4.

 

**Reset slave replication information on node zlm4.(optional)**

 1 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
 2 *************************** 1. row ***************************
 3                Slave_IO_State: 
 4                   Master_Host: 192.168.1.102
 5                   Master_User: repl
 6                   Master_Port: 3308
 7                 Connect_Retry: 60
 8               Master_Log_File: mysql-bin.000023
 9           Read_Master_Log_Pos: 1718
10                Relay_Log_File: zlm4-relay-bin.000003
11                 Relay_Log_Pos: 775
12         Relay_Master_Log_File: mysql-bin.000023
13              Slave_IO_Running: No
14             Slave_SQL_Running: No
15               Replicate_Do_DB: 
16           Replicate_Ignore_DB: 
17            Replicate_Do_Table: 
18        Replicate_Ignore_Table: 
19       Replicate_Wild_Do_Table: 
20   Replicate_Wild_Ignore_Table: 
21                    Last_Errno: 0
22                    Last_Error: 
23                  Skip_Counter: 0
24           Exec_Master_Log_Pos: 1718
25               Relay_Log_Space: 2831
26               Until_Condition: None
27                Until_Log_File: 
28                 Until_Log_Pos: 0
29            Master_SSL_Allowed: No
30            Master_SSL_CA_File: 
31            Master_SSL_CA_Path: 
32               Master_SSL_Cert: 
33             Master_SSL_Cipher: 
34                Master_SSL_Key: 
35         Seconds_Behind_Master: NULL
36 Master_SSL_Verify_Server_Cert: No
37                 Last_IO_Errno: 0
38                 Last_IO_Error: 
39                Last_SQL_Errno: 0
40                Last_SQL_Error: 
41   Replicate_Ignore_Server_Ids: 
42              Master_Server_Id: 0
43                   Master_UUID: 3ba41aa7-9b79-11e8-ad75-080027de0e0e
44              Master_Info_File: /data/mysql/mysql3308/data/master.info
45                     SQL_Delay: 0
46           SQL_Remaining_Delay: NULL
47       Slave_SQL_Running_State: 
48            Master_Retry_Count: 86400
49                   Master_Bind: 
50       Last_IO_Error_Timestamp: 
51      Last_SQL_Error_Timestamp: 
52                Master_SSL_Crl: 
53            Master_SSL_Crlpath: 
54            Retrieved_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:20-25
55             Executed_Gtid_Set: 42aada54-65ea-ee17-55f0-b47cf387c038:1-25
56                 Auto_Position: 1
57          Replicate_Rewrite_DB: 
58                  Channel_Name: 
59            Master_TLS_Version: 
60 1 row in set (0.00 sec)
61 
62 (zlm@192.168.1.103 3308)[(none)]>reset slave all;
63 Query OK, 0 rows affected (0.03 sec)
64 
65 (zlm@192.168.1.103 3308)[(none)]>show slave statusG
66 Empty set (0.00 sec)
67 
68 //This step is merely used to make the environment clean and tidy.It's not necessary.

 

本文由美高梅网站是多少发布于美高梅-数据,转载请注明出处:在PXC中重新添加掉线节点

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