db_ha集群所有节点重新开机的操作步骤

Posted 2023-03-02 瀚高PG实验室

瀚高数据库
目录
环境
文档用途
详细信息

环境
系统平台：Linux x86-64 Red Hat Enterprise Linux 7
版本：4.5.7
文档用途
本文档用于db_ha集群所有节点重新开机操作步骤。

详细信息
1、查看集群状态streamingType=NONE为主库，ASYNC为异步流复制，SYNC为同步流复制，healthy=t节点状态正常。

/usr/local/db_ha/bin/db_ha select -f /usr/local/db_ha/conf/db_ha.conf

connect monitor success

cluster num = 3         secondary monitor is normal

nodeip=192.168.80.228,nodetype=PRIMARY,replicationName=ha228 streamingType=NONE streamingState=none healthy=t agentState=NORMAL

nodeip=192.168.80.229,nodetype=STANDBY,replicationName=ha229 streamingType=ASYNC streamingState=streaming healthy=t agentState=NORMAL

nodeip=192.168.80.230,nodetype=STANDBY,replicationName=ha230 streamingType=ASYNC streamingState=streaming healthy=t agentState=NORMAL

2、查看主监控节点

ps -ef | grep -v grep|grep primary_monitor

root     16238     1  5 17:42 ?        00:00:26 /usr/local/db_ha/bin/primary_monitor /usr/local/db_ha/conf/primary_monitor.conf Come_from_secondary

root     16239 16238  0 17:42 ?        00:00:00 /usr/local/db_ha/bin/primary_monitor /usr/local/db_ha/conf/primary_monitor.conf Come_from_secondary

3、关机步骤，先关闭备节点，最后关闭主节点；关闭系统前先关闭本节点agent服务。

ha_ctl -a -f /usr/local/db_ha/conf/agent.conf stop

4、开机步骤，先开机主节点，再开机备节点和主监控节点。（主备监控不会开机自启，所以顺序不受影响）

5、主节点检查流复制状态

ps -ef | grep -v grep |grep walsend

root     18264 17608  0 17:42 ?        00:00:00 postgres: walsender sysdba 192.168.80.229(44074) streaming 0/1D001158

root     18267 17608  0 17:42 ?        00:00:00 postgres: walsender sysdba 192.168.80.230(33520) streaming 0/1D001158

6、备节点检查流复制状态

ps -ef | grep -v grep |grep receiver
root      3718  3711  0 5月24 ?       00:08:50 postgres: walreceiver   streaming 0/1D0016C8

7、流复制状态正常之后，启动主监控。

/usr/local/db_ha/bin/primary_monitor  /usr/local/db_ha/conf/primary_monitor.conf

8、检查集群状态

/usr/local/db_ha/bin/db_ha select -f /usr/local/db_ha/conf/db_ha.conf

connect monitor success

cluster num = 3         WARNING : secondary monitor is lost

nodeip=192.168.80.228,nodetype=PRIMARY,replicationName=ha228 streamingType=NONE streamingState=none healthy=t agentState=NORMAL

nodeip=192.168.80.229,nodetype=STANDBY,replicationName=ha229 streamingType=ASYNC streamingState=streaming healthy=t agentState=NORMAL

nodeip=192.168.80.230,nodetype=STANDBY,replicationName=ha230 streamingType=ASYNC streamingState=streaming healthy=t agentState=NORMAL

注意：

主监控配置文件设置了备监控自启动，备监控无需手动启动

auto_start_new_secondary = on