pacemaker搭建HTTP集群

5645re · 发表于 2017-9-13 10:20:20

#以node01为例修改主机名
#node02需要同样的配置
[iyunv@node01 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1       localhost localhost.localdomain localhost6 localhost6.localdomain6
10.10.10.5 node01
10.10.10.6 node02
#关闭防火墙以及SElinux
#node02需要同样配置

[iyunv@node01 ~]# systemctl stop firewalld
[iyunv@node01 ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
[iyunv@node01 ~]# setenforce 0
[iyunv@node01 ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
#配置pacemaker的EPEL源
#node02需要同样配置
[iyunv@node01 ~]# cat /etc/yum.repos.d/pacemaker.repo
[pacemaker]
name=pacemaker
baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=0
#下载pacemaker安装包
#node02需要同样配置

[iyunv@node01 ~]#  yum install pacemaker pcs resource-agents -y
#配置节点之间认证
#node02需要同样配置

[iyunv@node01 ~]# ssh-keygen -t rsa -P ''
[iyunv@node01 ~]# ssh-copy-id node02
#修改pacemaker的用户密码（pacemaker使用的用户是hacluster，软件安装完后用户以添加）
#node02需要同样配置
[iyunv@node01 ~]# passwd hacluster

#启动pcs服务
#node02需要同样配置
[iyunv@node01 ~]# systemctl restart pcsd
#设置节点认证
#只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]# pcs cluster auth node01 node02
Username: hacluster
Password:
node02: Authorized
node01: Authorized
#创建一个名为mycluster的集群，并将node01和node02加入到集群节点上
#只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]# pcs cluster setup --force --name mycluster node01 node02
Destroying cluster on nodes: node01, node02...
node01: Stopping Cluster (pacemaker)...
node02: Stopping Cluster (pacemaker)...
node01: Successfully destroyed cluster
node02: Successfully destroyed cluster

Sending cluster config files to the nodes...
node01: Succeeded
node02: Succeeded

Synchronizing pcsd certificates on nodes node01, node02...
node02: Success
node01: Success

Restarting pcsd on the nodes in order to reload the certificates...
node02: Success
node01: Success

[iyunv@node01 ~]# pcs cluster start --all
node01: Starting Cluster...
node02: Starting Cluster...
#查看集群状态
[iyunv@node01 ~]# pcs status
Cluster name: mycluster
WARNING: no stonith devices and stonith-enabled is not false
Stack: corosync
Current DC: node02 (version 1.1.15-11.el7_3.5-e174ec8) - partition with quorum
Last updated: Mon Sep 11 22:54:14 2017       Last change: Mon Sep 11 22:53:39 2017 by hacluster via crmd on node02

2 nodes and 0 resources configured

Online: [ node01 node02 ]

No resources

Daemon Status:
  corosync: active/disabled
  pacemaker: active/disabled
  pcsd: active/disabled

#查看corosync的状态

[iyunv@node01 ~]# pcs status corosync

Membership information
----------------------
Nodeid    Votes Name
      1       1 node01 (local)
      2       1 node02

#查看状态是否正常
[iyunv@node01 ~]#  crm_verify -L -V
error: unpack_resources: Resource start-up disabled since no STONITH resources have been defined
error: unpack_resources: Either configure some or disable STONITH with the stonith-enabled option
error: unpack_resources: NOTE: Clusters with shared data need STONITH to ensure data integrity
Errors found during check: config not valid
**发现报错了

#关闭报错信息
[iyunv@node01 ~]#  pcs property set stonith-enabled=false

#设置VIP
#只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]# pcs  resource create ClusterIP ocf:heartbeat:IPaddr2 nic=ens34 ip=10.10.10.8 cidr_netmask=32  op monitor interval=30s

#安装http服务
#node02需要同样配置
[iyunv@node01 ~]#  yum  -y install  httpd

#编辑apache首页
#node02需要同样配置（node2上把node01改为node02）

[iyunv@node01 ~]# vi /var/www/html/index.html
<html>
<body>welcome to  node 1 </body>
</html>

#配置apache的URL；
#为了监视您的Apache实例的健康和恢复它如果失败,起搏器假设所使用的资源代理服务器状态的URL。

#node02需要同样配置

[iyunv@node01 ~]# vi /etc/httpd/conf/httpd.conf
<Location /server-status>
SetHandler server-status
Order deny,allow
Deny from all
Allow from 127.0.0.1
</Location>

#将apache加入集群
#只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]# pcs resource create Web ocf:heartbeat:apache  configfile=/etc/httpd/conf/httpd.conf    statusurl="http://localhost/server-status" op monitor interval=1min

#设置apache的超时时间
##只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]#  pcs resource op defaults timeout=240s

#将VIP和apache捆绑在一起
##只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]# pcs constraint colocation add Web ClusterIP INFINITY

#设置启动顺序
##只在node01操作，所有操作会自动同步到node02
[iyunv@node01 ~]#  pcs constraint order ClusterIP then Web
Adding ClusterIP Web (kind: Mandatory) (Options: first-action=start then-action=start)

#查看集群状态

[iyunv@node01 ~]# pcs status
Cluster name: mycluster
Stack: corosync
Current DC: node01 (version 1.1.15-11.el7_3.5-e174ec8) - partition with quorum
Last updated: Tue Sep 12 16:06:59 2017       Last change: Tue Sep 12 16:06:49 2017 by root via cibadmin on node01

2 nodes and 2 resources configured

Online: [ node01 node02 ]

Full list of resources:

ClusterIP (ocf::heartbeat:IPaddr2): Started node01
Web (ocf::heartbeat:apache): Started node01

Daemon Status:
  corosync: active/disabled
  pacemaker: active/disabled
  pcsd: active/disabled
#此时集群都在node01上。

#我们宕掉node01，在node02上查看集群状态
[iyunv@node02 ~]# pcs status
Cluster name: mycluster
Stack: corosync
Current DC: node02 (version 1.1.15-11.el7_3.5-e174ec8) - partition with quorum
Last updated: Tue Sep 12 17:02:24 2017       Last change: Tue Sep 12 17:01:57 2017 by root via cibadmin on node01

2 nodes and 2 resources configured

Online: [ node02 ]
OFFLINE: [ node01 ]

Full list of resources:

ClusterIP (ocf::heartbeat:IPaddr2): Started node02
Web (ocf::heartbeat:apache): Started node02

Daemon Status:
  corosync: active/disabled
  pacemaker: active/disabled
  pcsd: active/disabled

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