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HG_REPMGR Virtual IP虚拟IP配置参考
详细信息
Hg_Repmgr Virtual IP使用说明示例
当前环境IP地址
| [highgo@dbrs conf]$ cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.6.16 dbrs 192.168.6.17 dbrs2 [highgo@dbrs conf]$ |
1. 系统配置
hg_repmgr的virtual IP功能是使用系统命令进行virtual ip的漂移，所以需要给highgo
户配置免密sudo权限。## Allow root to run any commands anywhere
| vi /etc/sudoers root ALL=(ALL) ALL highgo ALL=(ALL) NOPASSWD:ALL %highgo ALL=(ALL) NOPASSWD:ALL 测试： [highgo@dbrs2 ~]$ sudo tail -n 50 /var/log/messages |
下面可以利用repmgr进行流复制环境的搭配
2. 配置各个节点的hg_repmgr.conf配置文件。
新建：
新建repmgr
| # cus node_id=1 node_name=dbrs conninfo='host=dbrs user=hgrepmgr dbname=hgrepmgr connect_timeout=2' data_directory='/opt/highgo/5.6.1/data' pg_bindir='/opt/highgo/5.6.1/bin' passfile='/home/highgo/.pgpass' failover=automatic promote_command='repmgr -f /opt/highgo/5.6.1/conf/hg_repmgr.conf standby promote' follow_command='repmgr -f /opt/highgo/5.6.1/conf/hg_repmgr.conf standby follow --upstream-node-id=%n' log_file='/opt/highgo/5.6.1/data/log/hg_repmgr.log' virtual_ip = '192.168.6.201' network_card = 'enp0s3' gateway = '192.168.6.254' |
以上是primary节点的配置，standby节点配置类似（需要改变一下node_id和node_name）
3. 生成primary节点数据库后，执行repmgr primary register进行注册。
执行repmgr cluster show查看：
具体命令参考HG_REPMGR配置章节
在注册primary成功后，virtual IP会自动绑定到该节点的网卡上。可通过ip addr查看。
| [highgo@dbrs ~]$ ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 08:00:27:65:b4:93 brd ff:ff:ff:ff:ff:ff inet 192.168.6.16/24 brd 192.168.6.255 scope global noprefixroute enp0s3 valid_lft forever preferred_lft forever inet 192.168.6.201/32 scope global enp0s3 valid_lft forever preferred_lft forever inet6 fe80::72b4:e379:e445:51bb/64 scope link noprefixroute valid_lft forever preferred_lft forever inet6 fe80::600:efed:eea6:3304/64 scope link tentative noprefixroute dadfailed valid_lft forever preferred_lft forever |
4. 对standby进行clone，并启动注册。
具体命令参考HG_REPMGR配置章节
repmgr cluster show查看注册信息：
| [highgo@dbrs conf]$ repmgr -f /opt/highgo/5.6.1/conf/hg_repmgr.conf cluster show ID | Name | Role | Status | Upstream | Location | Connection string ----+-------+---------+----------------------+----------+----------+------------------------------------------------------------ 1 | dbrs | primary | * running | | default | host=dbrs user=hgrepmgr dbname=hgrepmgr connect_timeout=2 2 | dbrs2 | standby | ! running as primary | dbrs | default | host=dbrs2 user=hgrepmgr dbname=hgrepmgr connect_timeout=2 |
5. 对每个节点启动repmgrd 监控进程。
通过执行以下命令启动：
| repmgrd -d |
6. 利用下面shell脚本，模拟向流复制集群中写入数据，指定VIP
| [highgo@dbrs conf]$ cat /tmp/b.sh #!/bin/bash DATE=`date +%Y-%m-%d-%H` . ~/.bash_profile psql -h 192.168.6.201 -d highgo -p 5866 -U highgo << EOF insert into test values(10001,'张强'); \q EOF Sh b.sh 显示插入成功，检查数据表test， 已经插入了一条数据。 highgo=# select * from test; n | t -------+------ 10001 | 张强 (1 行记录) |
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