标签：主从 stop version 平滑 between point poi ping long
互联网金融MySQL高可用架构之-MHA在线平滑切换过程
--切换命令如下：
[root@MHA bin]# masterha_master_switch --conf=/etc/app1.cnf --master_state=alive --orig_master_is_new_slave
--MHA 版本0.56
Mon Sep 10 10:39:03 2018 - [info] MHA::MasterRotate version 0.56.
--启动在线切换
Mon Sep 10 10:39:03 2018 - [info] Starting online master switch..
Mon Sep 10 10:39:03 2018 - [info]
--第一阶段配置检查
Mon Sep 10 10:39:03 2018 - [info] * Phase 1: Configuration Check Phase..
Mon Sep 10 10:39:03 2018 - [info]
--告警不用管，全局配置文件没有找到
Mon Sep 10 10:39:03 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
--读取应用默认配置文件/etc/app1.cnf
Mon Sep 10 10:39:03 2018 - [info] Reading application default configuration from /etc/app1.cnf..
--读取服务器配置
Mon Sep 10 10:39:03 2018 - [info] Reading server configuration from /etc/app1.cnf..
--没有采用GTID
Mon Sep 10 10:39:04 2018 - [info] GTID failover mode = 0
--当前master alive
Mon Sep 10 10:39:04 2018 - [info] Current Alive Master: master(192.168.56.101:3306)
--slave alive
Mon Sep 10 10:39:04 2018 - [info] Alive Slaves:
Mon Sep 10 10:39:04 2018 - [info] slave1(192.168.56.102:3306)
--MariaDB 版本10.1.35
Version=10.1.35-MariaDB (oldest major version between slaves) log-bin:enabled
Mon Sep 10 10:39:04 2018 - [info] Replicating from master(192.168.56.101:3306)
Mon Sep 10 10:39:04 2018 - [info] slave2(192.168.56.103:3306) Version=10.1.35-MariaDB (oldest major version between slaves) log-bin:enabled
Mon Sep 10 10:39:04 2018 - [info] Replicating from 192.168.56.101(192.168.56.101:3306)
It is better to execute FLUSH NO_WRITE_TO_BINLOG TABLES on the master before switching. Is it ok to execute on master(192.168.56.101:3306)?
--输入YES
(YES/no):** yes**
Mon Sep 10 10:42:00 2018 - [info] Executing FLUSH NO_WRITE_TO_BINLOG TABLES. This may take long time..
Mon Sep 10 10:42:00 2018 - [info] ok.
Mon Sep 10 10:42:00 2018 - [info] Checking MHA is not monitoring or doing failover..
--检查slave1、slave2复制健康情况
Mon Sep 10 10:42:00 2018 - [info] Checking replication health on slave1..
Mon Sep 10 10:42:00 2018 - [info] ok.
Mon Sep 10 10:42:00 2018 - [info] Checking replication health on slave2..
Mon Sep 10 10:42:00 2018 - [info] ok.
Mon Sep 10 10:42:00 2018 - [info] Searching new master from slaves..
Mon Sep 10 10:42:00 2018 - [info] Candidate masters from the configuration file:
--没有发现candidate masters
Mon Sep 10 10:42:00 2018 - [info] Non-candidate masters:
Mon Sep 10 10:42:00 2018 - [info]
From:
--主从结构如下，一主两从架构
master(192.168.56.101:3306) (current master)
+--slave1(192.168.56.102:3306)
+--slave2(192.168.56.103:3306)
--主从关系发生变化
To:
slave1(192.168.56.102:3306) (new master)
+--slave2(192.168.56.103:3306)
+--master(192.168.56.101:3306)
Starting master switch from master(192.168.56.101:3306) to
--输入YES，主从关系发生改变
slave1(192.168.56.102:3306)? (yes/NO): yes
Mon Sep 10 10:42:34 2018 - [info] Checking whether slave1(192.168.56.102:3306) is ok for the new master..
Mon Sep 10 10:42:34 2018 - [info] ok.
Mon Sep 10 10:42:34 2018 - [info] master(192.168.56.101:3306): SHOW SLAVE STATUS returned empty result. To check replication filtering rules, temporarily executing CHANGE MASTER to a dummy host.
Mon Sep 10 10:42:34 2018 - [info] master(192.168.56.101:3306): Resetting slave pointing to the dummy host.
Mon Sep 10 10:42:34 2018 - [info] ** Phase 1: Configuration Check Phase completed.
Mon Sep 10 10:42:34 2018 - [info]
Mon Sep 10 10:42:34 2018 - [info] * Phase 2: Rejecting updates Phase..
Mon Sep 10 10:42:34 2018 - [info]
Mon Sep 10 10:42:34 2018 - [info] Executing master ip online change script to disable write on the current master:
Mon Sep 10 10:42:34 2018 - [info] /usr/local/bin/master_ip_online_change --command=stop --orig_master_host=master --orig_master_ip=192.168.56.101 --orig_master_port=3306 --orig_master_user=‘admin‘ --orig_master_password=‘mhaadmin‘ --new_master_host=slave1 --new_master_ip=192.168.56.102 --new_master_port=3306 --new_master_user=‘admin‘ --new_master_password=‘mhaadmin‘ --orig_master_ssh_user=root --new_master_ssh_user=root --orig_master_is_new_slave
ARGS: $VAR1 = [
‘--command=stop‘,
‘--orig_master_host=master‘,
‘--orig_master_ip=192.168.56.101‘,
‘--orig_master_port=3306‘,
‘--orig_master_user=admin‘,
‘--orig_master_password=mhaadmin‘,
‘--new_master_host=slave1‘,
‘--new_master_ip=192.168.56.102‘,
‘--new_master_port=3306‘,
‘--new_master_user=admin‘,
‘--new_master_password=mhaadmin‘,
‘--orig_master_ssh_user=root‘,
‘--new_master_ssh_user=root‘,
‘--orig_master_is_new_slave‘
];
Unknown option: orig_master_ssh_user
Unknown option: new_master_ssh_user
Unknown option: orig_master_is_new_slave
Mon Sep 10 10:42:34 2018 662234 Set read_only on the new master.. ok.
bind: Cannot assign requested address
Mon Sep 10 10:42:34 2018 737217 Set read_only=1 on the orig master.. ok.
Mon Sep 10 10:42:34 2018 739814 Killing all application threads..
Mon Sep 10 10:42:34 2018 739843 done.
STOP ARGS: $VAR1 = [];
Mon Sep 10 10:42:34 2018 - [info] ok.
Mon Sep 10 10:42:34 2018 - [info] Locking all tables on the orig master to reject updates from everybody (including root):
Mon Sep 10 10:42:34 2018 - [info] Executing FLUSH TABLES WITH READ LOCK..
Mon Sep 10 10:42:34 2018 - [info] ok.
Mon Sep 10 10:42:34 2018 - [info] Orig master binlog:pos is mysql-bin.000007:505.
Mon Sep 10 10:42:34 2018 - [info] Waiting to execute all relay logs on slave1(192.168.56.102:3306)..
Mon Sep 10 10:42:34 2018 - [info] master_pos_wait(mysql-bin.000007:505) completed on slave1(192.168.56.102:3306). Executed 0 events.
Mon Sep 10 10:42:34 2018 - [info] done.
Mon Sep 10 10:42:34 2018 - [info] Getting new master‘s binlog name and position..
Mon Sep 10 10:42:34 2018 - [info] mysql-bin.000007:505
Mon Sep 10 10:42:34 2018 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO MASTER_HOST=‘slave1 or 192.168.56.102‘, MASTER_PORT=3306, MASTER_LOG_FILE=‘mysql-bin.000007‘, MASTER_LOG_POS=505, MASTER_USER=‘repl‘, MASTER_PASSWORD=‘xxx‘;
Mon Sep 10 10:42:34 2018 - [info] Executing master ip online change script to allow write on the new master:
Mon Sep 10 10:42:34 2018 - [info] /usr/local/bin/master_ip_online_change --command=start --orig_master_host=master --orig_master_ip=192.168.56.101 --orig_master_port=3306 --orig_master_user=‘admin‘ --orig_master_password=‘mhaadmin‘ --new_master_host=slave1 --new_master_ip=192.168.56.102 --new_master_port=3306 --new_master_user=‘admin‘ --new_master_password=‘mhaadmin‘ --orig_master_ssh_user=root --new_master_ssh_user=root --orig_master_is_new_slave
ARGS: $VAR1 = [
‘--command=start‘,
‘--orig_master_host=master‘,
‘--orig_master_ip=192.168.56.101‘,
‘--orig_master_port=3306‘,
‘--orig_master_user=admin‘,
‘--orig_master_password=mhaadmin‘,
‘--new_master_host=slave1‘,
‘--new_master_ip=192.168.56.102‘,
‘--new_master_port=3306‘,
‘--new_master_user=admin‘,
‘--new_master_password=mhaadmin‘,
‘--orig_master_ssh_user=root‘,
‘--new_master_ssh_user=root‘,
‘--orig_master_is_new_slave‘
];
Unknown option: orig_master_ssh_user
Unknown option: new_master_ssh_user
Unknown option: orig_master_is_new_slave
Mon Sep 10 10:42:34 2018 827330 Set read_only=0 on the new master.
Mon Sep 10 10:42:34 2018 - [info] ok.
Mon Sep 10 10:42:34 2018 - [info]
Mon Sep 10 10:42:34 2018 - [info] * Switching slaves in parallel..
Mon Sep 10 10:42:34 2018 - [info]
Mon Sep 10 10:42:34 2018 - [info] -- Slave switch on host slave2(192.168.56.103:3306) started, pid: 4263
Mon Sep 10 10:42:34 2018 - [info]
Mon Sep 10 10:42:35 2018 - [info] Log messages from slave2 ...
Mon Sep 10 10:42:35 2018 - [info]
Mon Sep 10 10:42:34 2018 - [info] Waiting to execute all relay logs on slave2(192.168.56.103:3306)..
Mon Sep 10 10:42:34 2018 - [info] master_pos_wait(mysql-bin.000007:505) completed on slave2(192.168.56.103:3306). Executed 0 events.
Mon Sep 10 10:42:34 2018 - [info] done.
Mon Sep 10 10:42:34 2018 - [info] Resetting slave slave2(192.168.56.103:3306) and starting replication from the new master slave1(192.168.56.102:3306)..
Mon Sep 10 10:42:34 2018 - [info] Executed CHANGE MASTER.
Mon Sep 10 10:42:35 2018 - [info] Slave started.
Mon Sep 10 10:42:35 2018 - [info] End of log messages from slave2 ...
Mon Sep 10 10:42:35 2018 - [info]
Mon Sep 10 10:42:35 2018 - [info] -- Slave switch on host slave2(192.168.56.103:3306) succeeded.
Mon Sep 10 10:42:35 2018 - [info] Unlocking all tables on the orig master:
Mon Sep 10 10:42:35 2018 - [info] Executing UNLOCK TABLES..
Mon Sep 10 10:42:35 2018 - [info] ok.
Mon Sep 10 10:42:35 2018 - [info] Starting orig master as a new slave..
Mon Sep 10 10:42:35 2018 - [info] Resetting slave master(192.168.56.101:3306) and starting replication from the new master slave1(192.168.56.102:3306)..
--执行change master
Mon Sep 10 10:42:35 2018 - [info] Executed CHANGE MASTER.
--启动slave线程
Mon Sep 10 10:42:36 2018 - [info] Slave started.
--所有新的slave服务器切换成功
Mon Sep 10 10:42:36 2018 - [info] All new slave servers switched successfully.
Mon Sep 10 10:42:36 2018 - [info]
Mon Sep 10 10:42:36 2018 - [info] * Phase 5: New master cleanup phase..
Mon Sep 10 10:42:36 2018 - [info]
--reset master;
Mon Sep 10 10:42:36 2018 - [info] slave1: Resetting slave info succeeded.
Mon Sep 10 10:42:36 2018 - [info] Switching master to slave1(192.168.56.102:3306) completed successfully.
[root@MHA bin]# 标签：主从 stop version 平滑 between point poi ping long
原文地址：http://blog.51cto.com/roidba/2173140
