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在 Debian 安裝 Percona Xtradb Cluster 5.5.34 注意事項

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最近幫公司安裝新的三台機器,全部上 Debian 7.5 Server 版本,統一安裝 Percona Xtradb Cluster 最新版本 5.5.37。設定完第一台 Node,並且透過底下指令 boot up 成第一台 PXC。

$ /etc/init.d/mysql bootstrap-pxc

後續第二台要啟動跟第一台進行 SST,寫到一半直接噴底下錯誤訊息

WSREP_SST: [ERROR] Cleanup after exit with status:32 (20140702 10:57:28.004) WSREP_SST: [INFO] Removing the sst_in_progress file (20140702 10:57:28.006) 140702 10:57:28 [ERROR] WSREP: Process completed with error: wsrep_sst_xtrabackup –role ‘joiner’ –address ’192.168.1.101′ –auth ‘xxxxx:xxxxxx’ –datadir ‘/var/lib/mysql/’ –defaults-file ‘/etc/mysql/my.cnf’ –parent ’16042′: 32 (Broken pipe) 140702 10:57:28 [ERROR] WSREP: Failed to read uuid:seqno from joiner script. 140702 10:57:28 [ERROR] WSREP: SST failed: 32 (Broken pipe)

MySQL Performance Blog 找到一篇 5.5.34 Release Note,裡面提到在 5.5.34 版本以後,請使用 xtrabackup-v2 這是之前的 xtrabackup 重新命名過來的。如果重新啟動,還是持續出現此問題的話,請將系統的 MySQL Data 目錄清空,重新跑 SST 拉資料。

$ rm -rf /var/lib/mysql/* $ /etc/init.d/mysql restart

基本上這樣就可以了,另外 MySQL 裝好時,預設都沒有開啟任何 Log 紀錄,請務必將 Log 打開,不然怎麼 Debug,底下附上 Debian 的 my.cnf 設定

innodb_log_file_size = 64M
server-id               = 2
log_bin                 = /var/log/mysql/mysql-bin.log
log_error                      = /var/log/mysql/mysql-error.log
log_queries_not_using_indexes  = 1
slow_query_log                 = 1
slow_query_log_file            = /var/log/mysql/mysql-slow.log
long_query_time                = 1
default_storage_engine=InnoDB
binlog_format=ROW
log_slave_updates

另外 /etc/mysql/conf.d/wsrep.cnf

[MYSQLD]
wsrep_provider=/usr/lib/galera2/libgalera_smm.so
wsrep_cluster_address=gcomm://192.168.1.100,192.168.1.102
wsrep_sst_auth=xxxxx:xxxxx
wsrep_provider_options="gcache.size=2G"
wsrep_cluster_name=Percona
wsrep_sst_method=xtrabackup-v2
wsrep_node_name=db_02
wsrep_slave_threads=4
log_slave_updates
innodb_locks_unsafe_for_binlog=1
innodb_autoinc_lock_mode=2

注意 wsrep_sst_method 務必使用 xtrabackup-v2,如果是 CentOS 系統無此 xtrabackup-v2 指令時,請透過 ln 指令 Link 過去即可。結論就是沒事別亂升級系統,另外第二台要啟動進行 SST 時,可以打開看 innobackupex.backup.log 內是否有錯誤訊息,後續 Node 無法啟動的原因也會紀錄在此。


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