MHA自动切换步骤及过程剖析(八)
及决定新的master
Mon Apr 20 14:30:24 2015 - [info] Candidate masters from the configuration file:
Mon Apr 20 14:30:24 2015 - [info] Non-candidate masters:
Mon Apr 20 14:30:24 2015 - [info] New master is vdbsrv2(192.168.1.7:3306)
Mon Apr 20 14:30:24 2015 - [info] Starting master failover.. ###执行failover
Mon Apr 20 14:30:24 2015 - [info]
From:
vdbsrv1(192.168.1.6:3306) (current master)
+--vdbsrv2(192.168.1.7:3306)
+--vdbsrv3(192.168.1.8:3306)
To:
vdbsrv2(192.168.1.7:3306) (new master)
+--vdbsrv3(192.168.1.8:3306)
Mon Apr 20 14:30:24 2015 - [info]
Mon Apr 20 14:30:24 2015 - [info] * Phase 3.3: New Master Diff Log Generation Phase..
Mon Apr 20 14:30:24 2015 - [info]
Mon Apr 20 14:30:24 2015 - [info] This server has all relay logs. No need to generate diff files from the latest slave.
Mon Apr 20 14:30:24 2015 - [info] Sending binlog..
Mon Apr 20 14:30:25 2015 - [info] scp from local:/var/log/masterha/app1/saved_master_binlog_from_vdbsrv1_3306_20150420143022.binlog to
root@vdbsrv2:/var/tmp/saved_master_binlog_from_vdbsrv1_3306_20150420143022.binlog succeeded.
Mon Apr 20 14:30:25 2015 - [info]
Mon Apr 20 14:30:25 2015 - [info] * Phase 3.4: Master Log Apply Phase..
Mon Apr 20 14:30:25 2015 - [info]
Mon Apr 20 14:30:25 2015 - [info] *NOTICE: If any error happens from this phase, manual recovery is needed.
Mon Apr 20 14:30:25 2015 - [info] Starting recovery on vdbsrv2(192.168.1.7:3306)..
Mon Apr 20 14:30:25 2015 - [info] Generating diffs succeeded.
Mon Apr 20 14:30:25 2015 - [info] Waiting until all relay logs are applied.
Mon Apr 20 14:30:36 2015 - [info] done.
Mon Apr 20 14:30:36 2015 - [info] Getting slave status..
Mon Apr 20 14:30:36 2
015 - [info] This slave(vdbsrv2)'s Exec_Master_Log_Pos equals to Read_Master_Log_Pos(mysql-bin.000020:315514388).
No need to recover from Exec_Master_Log_Pos.
Mon Apr 20 14:30:36 2015 - [info] Connecting to the target slave host vdbsrv2, running recover script.. ###基于新主库Apply差量日志
Mon Apr 20 14:30:36 2015 - [info] Executing command: apply_diff_relay_logs --command=apply --slave_user='mha' --slave_host=vdbsrv2
--slave_ip=192.168.1.7 --slave_port=3306 --apply_files=/var/tmp/saved_master_binlog_from_vdbsrv1_3306_20150420143022.binlog
--workdir=/var/tmp --target_version=5.6.22-log --timestamp=20150420143022 --handle_raw_binlog=1 --disable_log_bin=0
--manager_version=0.56 --slave_pass=xxx
Mon Apr 20 14:30:36 2015 - [info]
Applying differential binary/relay log files /var/tmp/saved_master_binlog_from_vdbsrv1_3306_20150420143022.binlog on vdbsrv2:3306.
This may take long time...
Applying log files succeeded.
Mon Apr 20 14:30:36 2015 - [info] All relay logs were successfully applied.
Mon Apr 20 14:30:36 2015 - [info] Getting new master's binlog name and position..
Mon Apr 20 14:30:36 2015 - [info] mysql-bin.000011:241926689
Mon Apr 20 14:30:36 2015 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO
MASTER_HOST='vdbsrv2 or 192.168.1.7', MASTER_PORT=3306, MASTER_LOG_FILE='mysql-bin.000011', MASTER_LOG_POS=241926689, MASTER_USER='repl',
MASTER_PASSWORD='xxx';
Mon Apr 20 14:30:36 2015 - [info] Executing master IP activate script: ###IP漂移
Mon Apr 20 14:30:36 2015 - [info] /tmp/master_ip_failover --command=start --ssh_user=root --orig_master_host=vdbsrv1 --orig_master_ip=192.168.1.6
--orig_master_por