Mysql Percona XtraDB群集SST使用rsync不工作：wsrep_sstu rsync

我相信有一个简单的解决办法，但请原谅我，我是PXC的新手。我使用rsync将引导节点的状态传输到node2。node2是我要加入集群的节点。我最初尝试了Xtrabackup，但遇到了一些问题，我将在下次探讨。现在我正在使用rsync，因为我认为它很简单。如果向下滚动到[ERROR]，您将看到导致状态传输中断的问题所在。这可能是什么原因造成的

*WSREP_SST: **[ERROR]** find/rsync returned code 123: (20141228 02:24:40.505)
2014-12-28 02:24:40 9446 **[ERROR]** WSREP: Failed to read from: **wsrep_sst_rsync** --role 'donor' --address '192.168.70.2:4444/rsync_sst' --auth 'sst:sst' --socket*    

2014-12-28 02:24:24 9446 [Note] WSREP: (2861d1d7, 'tcp://0.0.0.0:4567') turning message relay requesting on, nonlive peers: 
2014-12-28 02:24:24 9446 [Note] WSREP: declaring 41f79045 at tcp://192.168.70.2:4567 stable
2014-12-28 02:24:24 9446 [Note] WSREP: Node 2861d1d7 state prim
2014-12-28 02:24:24 9446 [Note] WSREP: save pc into disk
2014-12-28 02:24:24 9446 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 0, memb_num = 2
2014-12-28 02:24:24 9446 [Note] WSREP: STATE_EXCHANGE: sent state UUID: 42495aba-8e30-11e4-9596-c702faf22ad0
2014-12-28 02:24:24 9446 [Note] WSREP: STATE EXCHANGE: sent state msg: 42495aba-8e30-11e4-9596-c702faf22ad0
2014-12-28 02:24:24 9446 [Note] WSREP: STATE EXCHANGE: got state msg: 42495aba-8e30-11e4-9596-c702faf22ad0 from 0 (node3)
2014-12-28 02:24:24 9446 [Note] WSREP: STATE EXCHANGE: got state msg: 42495aba-8e30-11e4-9596-c702faf22ad0 from 1 (node2)
2014-12-28 02:24:24 9446 [Note] WSREP: Quorum results:
    version    = 3,
    component  = PRIMARY,
    conf_id    = 1,
    members    = 1/2 (joined/total),
    act_id     = 0,
    last_appl. = 0,
    protocols  = 0/6/3 (gcs/repl/appl),
    group UUID = 48ec9889-8ddc-11e4-9efd-da6610fd24da
2014-12-28 02:24:24 9446 [Note] WSREP: Flow-control interval: [23, 23]
2014-12-28 02:24:24 9446 [Note] WSREP: New cluster view: global state: 48ec9889-8ddc-11e4-9efd-da6610fd24da:0, view# 2: Primary, number of nodes: 2, my index: 0, protocol version 3
2014-12-28 02:24:24 9446 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2014-12-28 02:24:24 9446 [Note] WSREP: REPL Protocols: 6 (3, 2)
2014-12-28 02:24:24 9446 [Note] WSREP: Service thread queue flushed.
2014-12-28 02:24:24 9446 [Note] WSREP: Assign initial position for certification: 0, protocol version: 3
2014-12-28 02:24:24 9446 [Note] WSREP: Service thread queue flushed.
2014-12-28 02:24:25 9446 [Note] WSREP: Member 1.0 (node2) requested state transfer from '*any*'. Selected 0.0 (node3)(SYNCED) as donor.
2014-12-28 02:24:25 9446 [Note] WSREP: Shifting SYNCED -> DONOR/DESYNCED (TO: 0)
2014-12-28 02:24:25 9446 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2014-12-28 02:24:25 9446 [Note] WSREP: Running: 'wsrep_sst_rsync --role 'donor' --address '192.168.70.2:4444/rsync_sst' --auth 'sst:sst' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf'  --binlog 'mysql-bin' --gtid '48ec9889-8ddc-11e4-9efd-da6610fd24da:0''
2014-12-28 02:24:25 9446 [Note] WSREP: sst_donor_thread signaled with 0
2014-12-28 02:24:25 9446 [Note] WSREP: Flushing tables for SST...
2014-12-28 02:24:25 9446 [Note] WSREP: Provider paused at 48ec9889-8ddc-11e4-9efd-da6610fd24da:0 (5)
2014-12-28 02:24:25 9446 [Note] WSREP: Tables flushed.
WSREP_SST: [INFO] Preparing binlog files for transfer: (20141228 02:24:26.201)
mysql-bin.000015
2014-12-28 02:24:27 9446 [Note] WSREP: (2861d1d7, 'tcp://0.0.0.0:4567') turning message relay requesting off
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest1.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest2.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest3.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest4.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest5.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest6.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest7.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest8.ibd": Permission denied (13)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1039) [sender=3.0.6]
rsync: send_files failed to open "/var/lib/mysql/mysql/innodb_index_stats.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/mysql/innodb_table_stats.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/mysql/slave_master_info.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/mysql/slave_relay_log_info.ibd": Permission denied (13)
rsync: send_files failed to open "/var/lib/mysql/mysql/slave_worker_info.ibd": Permission denied (13)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1039) [sender=3.0.6]
WSREP_SST: **[ERROR]** find/rsync returned code 123: (20141228 02:24:40.505)
2014-12-28 02:24:40 9446 **[ERROR]** WSREP: Failed to read from: **wsrep_sst_rsync** --role 'donor' --address '192.168.70.2:4444/rsync_sst' --auth 'sst:sst' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf'  --binlog 'mysql-bin' --gtid '48ec9889-8ddc-11e4-9efd-da6610fd24da:0'
2014-12-28 02:24:40 9446 **[ERROR]** WSREP: Process completed with error: wsrep_sst_rsync --role 'donor' --address '192.168.70.2:4444/rsync_sst' --auth 'sst:sst' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf'  --binlog 'mysql-bin' --gtid '48ec9889-8ddc-11e4-9efd-da6610fd24da:0': 255 (Unknown error 255)
2014-12-28 02:24:40 9446 [Note] WSREP: resuming provider at 5
2014-12-28 02:24:40 9446 [Note] WSREP: Provider resumed.
2014-12-28 02:24:40 9446 **[ERROR]** WSREP: Command did not run: wsrep_sst_rsync --role 'donor' --address '192.168.70.2:4444/rsync_sst' --auth 'sst:sst' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf'  --binlog 'mysql-bin' --gtid '48ec9889-8ddc-11e4-9efd-da6610fd24da:0'
2014-12-28 02:24:40 9446 [Warning] WSREP: 0.0 (node3): State transfer to 1.0 (node2) failed: -255 (Unknown error 255)
2014-12-28 02:24:40 9446 [Note] WSREP: Shifting DONOR/DESYNCED -> JOINED (TO: 0)
2014-12-28 02:24:40 9446 [Note] WSREP: Member 0.0 (node3) synced with group.
2014-12-28 02:24:40 9446 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 0)
2014-12-28 02:24:40 9446 [Note] WSREP: Synchronized with group, ready for connections
2014-12-28 02:24:40 9446 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2014-12-28 02:24:41 9446 [Note] WSREP: forgetting 41f79045 (tcp://192.168.70.2:4567)
2014-12-28 02:24:41 9446 [Note] WSREP: Node 2861d1d7 state prim
2014-12-28 02:24:41 9446 [Note] WSREP: save pc into disk
2014-12-28 02:24:41 9446 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 0, memb_num = 1
2014-12-28 02:24:41 9446 [Note] WSREP: forgetting 41f79045 (tcp://192.168.70.2:4567)
2014-12-28 02:24:41 9446 [Note] WSREP: STATE_EXCHANGE: sent state UUID: 4c2e3544-8e30-11e4-a0dc-d280b597b8d2
2014-12-28 02:24:41 9446 [Note] WSREP: STATE EXCHANGE: sent state msg: 4c2e3544-8e30-11e4-a0dc-d280b597b8d2
2014-12-28 02:24:41 9446 [Note] WSREP: STATE EXCHANGE: got state msg: 4c2e3544-8e30-11e4-a0dc-d280b597b8d2 from 0 (node3)
2014-12-28 02:24:41 9446 [Note] WSREP: Quorum results:
    version    = 3,
    component  = PRIMARY,
    conf_id    = 2,
    members    = 1/1 (joined/total),
    act_id     = 0,
    last_appl. = 0,
    protocols  = 0/6/3 (gcs/repl/appl),
    group UUID = 48ec9889-8ddc-11e4-9efd-da6610fd24da
2014-12-28 02:24:41 9446 [Note] WSREP: Flow-control interval: [16, 16]
2014-12-28 02:24:41 9446 [Note] WSREP: New cluster view: global state: 48ec9889-8ddc-11e4-9efd-da6610fd24da:0, view# 3: Primary, number of nodes: 1, my index: 0, protocol version 3
2014-12-28 02:24:41 9446 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2014-12-28 02:24:41 9446 [Note] WSREP: REPL Protocols: 6 (3, 2)
2014-12-28 02:24:41 9446 [Note] WSREP: Service thread queue flushed.
2014-12-28 02:24:41 9446 [Note] WSREP: Assign initial position for certification: 0, protocol version: 3
2014-12-28 02:24:41 9446 [Note] WSREP: Service thread queue flushed.
2014-12-28 02:24:46 9446 [Note] WSREP:  cleaning up 41f79045 (tcp://192.168.70.2:4567)

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从以下错误中可以看出，您对datadirectory的权限有问题：

rsync: send_files failed to open "/var/lib/mysql/sbtest/sbtest7.ibd": Permission denied (13)

我要检查的事项：

/var/lib/mysql中的所有数据文件是否都归mysql用户所有？ 你们有SELinux或AppArmor吗？它可能配置不正确。 请注意，使用rsync SST方法的施主将在其作为施主时阻止读/写操作。这可能会导致停机。

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我建议调查Percona XtraBackup您遇到的问题可能类似

是；查看my.cnf中的rsync配置—很可能运行rsync的用户没有/var/lib/mysql文件的读取权限。或者，考虑移动到使用XTrabkUpv2而不是RSyc，因为这不需要给供体数据库静默。