Pacemaker+Haproxy实现高可用和负载均衡_emq pacemaker+haproxy-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44846409/article/details/93873721

本文详细介绍如何在server1和server2上配置Red Hat Enterprise Linux的高级yum源，通过使用pssh, crmsh和pacemaker等工具，实现双机集群的心跳同步与负载均衡。文章深入讲解了corosync配置文件的编辑，以及通过crm命令行接口设置集群资源，如VIP和Apache服务，确保在一台服务器宕机时，另一台能无缝接管服务。

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配置高级的yum源(server1、server2)
[root@server1 yum.repos.d]# vim rhel-source.repo

 name=Red Hat Enterprise Linux $releasever - $basearch - Source
 baseurl=http://172.25.61.250/rhel6.5
 enabled=1
 gpgcheck=1
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
 
 [LoadBalancer]
 name=Red Hat Enterprise Linux $releasever - $basearch - Source
 baseurl=http://172.25.61.250/rhel6.5/LoadBalancer
 enabled=1
 gpgcheck=0
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
 
 [HighAvailability]
 name=Red Hat Enterprise Linux $releasever - $basearch - Source
 baseurl=http://172.25.61.250/rhel6.5/HighAvailability
 enabled=1
 gpgcheck=0
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
 
 [ResilientStorage]
 name=Red Hat Enterprise Linux $releasever - $basearch - Source
 baseurl=http://172.25.61.250/rhel6.5/ResilientStorage
 enabled=1
 gpgcheck=0
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
 
 [ScalableFileSystem]
 name=Red Hat Enterprise Linux $releasever - $basearch - Source
 baseurl=http://172.25.61.250/rhel6.5/ScalableFileSystem
 enabled=1
 gpgcheck=0
 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[root@server1 yum.repos.d]# yum clean all
[root@server1 yum.repos.d]# yum repolist
[root@server1 yum.repos.d]# scp rhel-source.repo server2:/etc/yum.repos.d/

下软件，提供crm命令行接口，配置心跳节点，同时启动
[root@server1 yum.repos.d]# yum clean all
[root@server1 yum.repos.d]# yum repolist
[root@server1 yum.repos.d]# scp rhel-source.repo server2:/etc/yum.repos.d/

安装软件
server1：

 yum install pssh-2.3.1-2.1.x86_64.rpm  crmsh-1.2.6-0.rc2.2.1.x86_64.rpm -y
 yum install pacemaker -y
  cd /etc/corosync/
  [root@server1 corosync]# cp corosync.conf.example corosync.conf
 [root@server1 corosync]# vim corosync.conf
                   bindnetaddr: 172.25.61.0	#同网段
                   mcastaddr: 226.94.1.1	
                   mcastport: 5413		
                   ttl: 1
   service {
           name:pacemaker
           ver:0
   }
 
 [root@server1 corosync]# scp /etc/corosync/corosync.conf server2:/etc/corosync/
 
 [root@server1 corosync]# scp /etc/corosync/corosync.conf server2:/etc/corosync/
 ##给sever2发一份

4.server1和server2开启服务

	[root@server2 corosync]# /etc/init.d/corosync start
	Starting Corosync Cluster Engine (corosync): [ OK ]
	[root@server1 corosync]# /etc/init.d/corosync start
	Starting Corosync Cluster Engine (corosync): [ OK ]

设置集群资源

 [root@server2 corosync]# crm
 crm(live)# configure
 crm(live)configure# show
 node server1
 node server2
 property $id="cib-bootstrap-options" \
 	dc-version="1.1.10-14.el6-368c726" \
 	cluster-infrastructure="classic openais (with plugin)" \
 	expected-quorum-votes="2"ww
 crm(live)configure# 				####初始化
 
 crm(live)configure# verify 
    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
 
 01.将fence设备关闭
 crm(live)configure# property stonith-enabled=false
 crm(live)configure# verify
 crm(live)configure# commit
 
 02.先设置集群资源VIP，再设置apache服务
 crm(live)configure# primitive vip ocf:heartbeat:IPaddr2 params ip=172.25.61.100 nic=eth0 cidr_netmask=24
 crm(live)configure# verify 
 crm(live)configure# commit

server1和server2安装http，撰写默认发布页

[root@server1 corosync]# cd /var/www/html/
[root@server1 html]# vim index.html
[root@server1 html]# cat index.html
server1

启动脚本

 crm(live)configure# primitive apache lsb:httpd op monitor interval=10s
 crm(live)configure# verify 
 crm(live)configure# commit

注意：动态监控下看到此时的VIP在server1上，httpd在server2上

设置资源组

 crm(live)configure# group website vip apache 
 crm(live)configure# verify 
 crm(live)configure# commit

测试

 [root@foundation61 Desktop]# curl 172.25.61.100
 server1
 [root@foundation61 Desktop]# curl 172.25.61.100
 server1
 [root@foundation61 Desktop]# curl 172.25.61.100
 server1
 [root@foundation61 Desktop]# curl 172.25.61.100
 server2
 [root@foundation61 Desktop]# curl 172.25.61.100
 server2
 [root@foundation61 Desktop]# curl 172.25.61.100
 server2

用客户主机访问，server1的corosyna服务停掉之后，有访问到了server2节点