HG_REPMGR Virtual IP虚拟IP配置

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目录

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详细信息

文档用途

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: 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: 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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