一、corosync+pacemaker集群前提准备
集群前提准备 --> HA-web
承接上文 --> corosync+pacemaker使用crmsh构建高可用集群
二、准备pcs
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[root@node1 ~]
# yum install pcs
禁用stonith设备
[root@node1 ~]
# pcs property set stonith-enable=false
[root@node1 ~]
# pcs property set no-quorum-policy=ignore
查看集群状态
[root@node1 ~]
# pcs status
Cluster name:
Last updated: Tue Nov 22 12:20:59 2016 Last change: Tue Nov 22 11:57:08 2016 by root via cibadmin on node1
Stack: classic openais (with plugin)
Current DC: node1 (version 1.1.14-8.el6_8.2-70404b0) - partition with quorum
2 nodes and 0 resources configured, 2 expected votes
Online: [ node1 node2 ]
Full list of resources:
PCSD Status:
Error: Unable to
read
/etc/cluster/cluster
.conf: No such
file
or directory
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这里有一个报错,提示为没有集群配置文件。但此处的配置文件需要cman插件提供,所以,暂不理会。
三、配置corosync+pacemaker+pcs高可用web
1、查看pcs支持的资源代理类型
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[root@node1 ~]
# pcs resource standards
ocf
lsb
service
stonith
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2、查看ocf资源代理类型的子类型
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[root@node1 ~]
# pcs resource providers
heartbeat
pacemaker
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3、查看可以被代理的资源
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[root@node1 ~]
# pcs resource agents
[root@node1 ~]
# pcs resource agents lsb
[root@node1 ~]
# pcs resource agents ocf:heartbeat
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4、查看资源代理的详细信息
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[root@node1 ~]
# pcs resource describ ocf:heartbeat:IPaddr
[root@node1 ~]
# pcs resource describ ocf:heartbeat:httpd
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5、定义ip httpd 资源(接上文,httpd提供页面,禁止开机启动)
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[root@node1 ~]
# pcs resource create webip ocf:heartbeat:IPaddr params ip=192.168.0.17 op monitor interval=20s timeout=40s
[root@node1 ~]
# pcs resource create webserver lsb:httpd op monitor interval=20s timeout=40s
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6、查看资源运行情况
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[root@node1 ~]
# pcs status
Cluster name:
Last updated: Tue Nov 22 13:07:16 2016 Last change: Tue Nov 22 13:06:45 2016 by root via cibadmin on node1
Stack: classic openais (with plugin)
Current DC: node1 (version 1.1.14-8.el6_8.2-70404b0) - partition with quorum
2 nodes and 2 resources configured, 2 expected votes
Online: [ node1 node2 ]
Full list of resources:
webip (ocf::heartbeat:IPaddr): Started node1
webserver (lsb:httpd): Started node2
PCSD Status:
Error: Unable to
read
/etc/cluster/cluster
.conf: No such
file
or directory
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7、定义排列约束
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[root@node1 ~]
# pcs constraint colocation add webserver with webip
[root@node1 ~]
# pcs status
Cluster name:
Last updated: Tue Nov 22 13:13:18 2016 Last change: Tue Nov 22 13:12:28 2016 by root via cibadmin on node1
Stack: classic openais (with plugin)
Current DC: node1 (version 1.1.14-8.el6_8.2-70404b0) - partition with quorum
2 nodes and 2 resources configured, 2 expected votes
Online: [ node1 node2 ]
Full list of resources:
webip (ocf::heartbeat:IPaddr): Started node2
webserver (lsb:httpd): Started node2
Failed Actions:
* webserver_start_0 on node1
'unknown error'
(1): call=20, status=complete, exitreason=
'none'
,
last-rc-change=
'Tue Nov 22 13:12:29 2016'
, queued=0ms,
exec
=508ms
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测试
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[root@node1 ~]
# curl 192.168.0.17
This is node2
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8、定义顺序约束
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[root@node1 ~]
# pcs constraint order webip then webserver
Adding webip webserver (kind: Mandatory) (Options: first-action=start
then
-action=start)
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9、定义位置约束
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[root@node1 ~]
# pcs constraint location webip prefers node2=100
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本文转自 元婴期 51CTO博客,原文链接:http://blog.51cto.com/jiayimeng/1875369