环境：
数据库服务器 2台
服务器一 操作系统：CentOS 6.8 x86_64
IP(eth0):192.168.11.61
主机名：node1
服务器二 操作系统：CentOS 6.8 x86_64
IP_1(eth0):192.168.11.62
主机名：node2
存储服务器 操作系统：CentOS 6.8 x86_64
IP_1(eth0):192.168.11.63
主机名：disk
共享盘:/dev/sdb（30G、LVM）
虚拟IP 192.168.11.69
1、共享磁盘的设置
[root@disk ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xa5927bb4.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-2610, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610): +10G
Command (m for help): w
The partition table has been altered!
[root@node1 /]# fdisk -l
Disk /dev/sda: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007f236
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 6528 51915776 8e Linux LVM
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x2eb7246b
Device Boot Start End Blocks Id System
/dev/sdb1 1 1305 10482381 83 Linux
Disk /dev/mapper/VolGroup-lv_root: 51.1 GB, 51078234112 bytes
255 heads, 63 sectors/track, 6209 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-lv_swap: 2080 MB, 2080374784 bytes
255 heads, 63 sectors/track, 252 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
格式化磁盘
[root@node1 ~]# mkfs.ext3 /dev/sdb
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
655360 inodes, 2620506 blocks
131025 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2684354560
80 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 39 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
2、用户及目录（两台数据库服务上都执行）：
创建 postgres用户
[root@node1 ~]# useradd postgres
创建数据库的data目录，并配置目录的权限
[root@node1 ~]# mkdir -p /home/postgres/pgsql9.6
[root@node1 ~]# mkdir -p /home/postgres/data
[root@node1 ~]# chown -R postgres:postgres /home/postgres
在postgres 用户下设置环境变量
export PATH=/home/postgres/pgsql9.6/bin:$PATH
export PGDATA=/home/postgres/data
export LD_LIBRARY_PATH=/home/postgres/pgsql9.6/lib
3、网络配置（三台机器都执行）：
root用户配置/etc/hosts文件，最终内容如下：
127.0.0.1 localhost.localdomain localhost.localdomain localhost4 localhost4.localdomain4 localhost
::1 localhost.localdomain localhost.localdomain localhost6 localhost6.localdomain6 localhost
192.168.11.61 node1
192.168.11.62 node2
192.168.11.63 disk
root用户关闭防火墙，命令如下：
[root@node1 ~]# chkconfig iptables off
[root@node1 ~]# service iptables stop
root用户编辑文件/etc/sysconfig/selinux，关闭selinux，命令如下：
[root@node1 ~]# vi /etc/sysconfig/selinux
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
4、SSH互信
root用户互信
[root@node1 ~]# ssh-keygen -t rsa -P ' '
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@node1
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@node2
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@disk
postgres用户互信
[root@node1 ~]# su - postgres
[postgres@node1 ~]$ ssh-keygen -t rsa -P ' '
[postgres@node1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub postgres@node1
[postgres@node1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub postgres@node2
[postgres@node1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pubpostgres@disk
root用户与postgres用户互信
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub postgres@node1
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub postgres@node2
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub postgres@disk
[postgres@node1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@node1
[postgres@node1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@node2
[postgres@node1 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@disk
5、安装共享存储
共享存储采用icsci + multipath的形式。
ISCSI
存储服务器
服务器端安装scsi-target-utils包。
编辑/etc/tgt/targets.conf文件添加存储分区，添加内容如下：
<target iqn.2017-04-05.dev:server.target1>
backing-store /dev/sdb1
</target>
配置服务，命令如下：
[root@disk ~]# service tgtd start
[root@disk ~]# chkconfig tgtd on
节点服务器（两台都安装）
客户端安装iscsi-initiator-utils包。
编辑/etc/iscsi/initiatorname.iscsi文件添加存储目标，文件内容如下：
InitiatorName=iqn.2017-04-05.dev:server.target1
配置服务：
[root@node1 ~]# chkconfig iscsi on
[root@node1 ~]# chkconfig iscsid on
[root@node1 ~]# service iscsi restart
[root@node1 ~]# service iscsid restart
创建目录，联机iscsi共享盘，命令如下：
[root@node1 ~]# iscsiadm -m discovery -t sendtargets -p 192.168.11.63:3260
[root@node1 ~]# iscsiadm -m node -T iqn.2017-04-05.dev:server.target1 -l
[root@node1 ~]# mount /dev/sdb /home/postgres/data
[root@node1 ~]# chown -R postgres:postgres /home/postgres/data
6、安装postgresql数据库
安装过程：
节点一
[postgres@node1 ~]$ tar -xvf postgresql-9.6.1.tar.bz2
[postgres@node1 ~]$ cd postgresql-9.6.1
[postgres@node1 postgresql-9.6.1]$ ./configure --prefix=/home/postgres/pgsql9.6/
[postgres@node1 postgresql-9.6.1]$ make
[postgres@node1 postgresql-9.6.1]$ make install
[postgres@node1 postgresql-9.6.1]$ /home/postgres/pgsql9.6/initdb -D /home/postgres/data (注意要确保你的/dev/sdb /挂载到了/home/postgres/data 可以df -h查看一下)
节点一关闭数据库服务，umount共享盘
在节点二安装数据库，将共享盘至/home/postgres/data目录下，删除data目录下的所有文件，之后安装数据库（重复节点一安装数据库的过程）。
节点二关闭数据库服务，umount共享盘
将共享盘挂载至节点一，重启数据库服务，进行检查
7、HA软件安装配置
安装事项
存储服务器：yum安装luci
节点服务器：yum安装ricci、cman、rgmanager
这四个软件均设置为开机自启
[root@disk ~]# chkconfig luci on
[root@node1 ~]# chkconfig ricci on
[root@node1 ~]# chkconfig cman on
[root@node1 ~]# chkconfigrgmanager on
所有服务器关闭NetworkManager服务并设置为开机不启动（否则无法启动cman）
[root@node1 ~]# serviceNetworkManager stop
[root@node1 ~]# chkconfigNetworkManager off
节点服务器：passwd ricci设置密码
存储服务器以操作系统root用户及其密码登录web管理界面：https://localhost:8084
1.登陆
2.创建集群
- 点击面板左侧的“Manage Clusters”
- 点击“Create”
3.、添加失效域
添加完集群之后，会自动重启节点服务器。
重新登录管理界面，点击刚创建的集群
点击“Failover Domains”，添加失效域
4.添加资源
点击“Resource”，添加资源
在下拉菜单中选择“Fielsystem”，添加共享盘资源（data）
在下拉菜单中选择“Ip Addres”，添加虚拟ip
在下拉菜单中选择“Script”，添加数据库服务脚本，注意脚本的可执行权限
5.集群状态
6.数据库服务脚本（注意脚本权限）
[root@node1 postgres]# cat service.sh
#!/bin/bash
# environment.
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
export PGDATA=/home/postgres/data
export PGUSER=postgres
export PGDATABASE=postgres
export PGHOST=localhost
export PGPORT=5432
export PATH=$PATH:$HOME/bin:/home/postgres/pgsql9.6/bin
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/postgres/pgsql9.6/lib
function start {
su - ${PGUSER} -c "pg_ctl start"
return 0
}
function stop {
su - ${PGUSER} -c "pg_ctl stop -m fast"
return 0
}
function reload {
su - ${PGUSER} -c "pg_ctl reload"
return 0
}
function status {
su - ${PGUSER} -c "pg_ctl status"
return $?
}
# See how we were called.
case "$1" in
"start")
start
exit $?
;;
"stop")
stop
exit $?
;;
"restart")
stop
start
exit $?
;;
"reload")
reload
exit $?
;;
"status")
status
exit $?
;;
*)
echo $"Usage: $prog {start|stop|restart|reload|status}"
exit 0
esac
7.服务器切换测试
将阶段一的服务器关闭，查看是否能切换到节点二上
[root@node2 postgres]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_node1-lv_root
37G 4.6G 31G 14% /
tmpfs 491M 26M 466M 6% /dev/shm
/dev/sda1 477M 35M 418M 8% /boot
/dev/sdb 20G 83M 19G 1% /home/postgres/data
[root@node2 postgres]# su - postgres
[postgres@node2 ~]$ psql
psql (9.6.1)
Type "help" for help.
postgres=#
服务器正常切换，数据库能正常使用
可以看出节点一掉了 ，服务运行中在节点二上
