准备工作： 准备5台虚拟机
classroom 用来做yum源 NTP
nodea 172.24.1.6 172.24.16.6
nodeb 172.24.1.7 172.24.16.7
nodec 172.24.1.8 172.24.16.8
storage 172.24.1.5 172.24.16.5
安装好系统，配好yum源，NTP，写好hosts
172.25.254.254 classroom
172.25.254.250 provision.example.com
172.25.0.10 nodea
172.25.0.11 nodeb
172.25.0.12 nodec
192.168.0.10 nodea.private.example.com
192.168.0.11 nodeb.private.example.com
192.168.0.12 nodec.private.example.com
开始搭建集群
1. 在nodea nodeb nodec 执行以下命令：
# yum list all
# firewall-cmd --permanent --add-service=high-availability
# firewall-cmd --reload
# yum install -y pcs fence-agents-all.x86_64 fence-agents-rht.x86_64
# systemctl start pcsd && systemctl enable pcsd
以下命令在nodea nodeb nodec 任意一个节点执行即可：
# id hacluster
# echo flectrag |passwd --stdin hacluster
# exit
# pcs cluster auth nodea.private.example.com nodeb.private.example.com nodec.private.example.com
# pcs cluster setup --name cluster0 nodea.private.example.com nodeb.private.example.com nodec.private.example.com
# pcs cluster start --all
#pcs cluster enable --all
# pcs status
若看到如下信息，则集群创建成功
[root@nodeb ~]# pcs status
Cluster name: cluster0
WARNING: no stonith devices and stonith-enabled is not false
Last updated: Wed Jun 2 17:16:42 2021
Last change: Wed Jun 2 17:16:26 2021
Stack: corosync
Current DC: nodeb.private.example.com (2) - partition with quorum
Version: 1.1.12-a14efad
3 Nodes configured
0 Resources configured
Online: [ nodea.private.example.com nodeb.private.example.com nodec.private.example.com ]
Full list of resources:
PCSD Status:
nodea.private.example.com: Online
nodeb.private.example.com: Online
nodec.private.example.com: Online
Daemon Status:
corosync: active/enabled
pacemaker: active/enabled
pcsd: active/enabled
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