corosync, pacemaker，nfs高可用mariadb
实验环境：
4台CentOS 7 的主机，并关闭的iptalbes和selinux功能
主机1：10.1.43.101 node1 corosync+pacemaker+amp
主机2：10.1.43.102 node2 corosync+pacemaker+amp
主机3：10.1.43.103 node3 corosync+pacemaker+amp
主机4：10.1.43.104 node4 nfs服务器
第一步：
在主机1上修改/etc/hosts配置文件，生成ssh公钥，把私钥发送给node2，node3，node4主机
[root@node1 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 10.1.43.101node1 10.1.43.102node2 10.1.43.103node3 10.1.43.104node4 [root@node1 ~]# ssh-keygen [root@node1 ~]# ssh-copy-id nodeX #X=2-4 [root@node1 ~]# scp /etc/hosts nodeX:/etc/hosts #X=2-4
第二步：
在node1-3主机上安装软件包，并把httpd和mariadb-server服务设置为开机启动
[root@node1 ~]# yum -y install httpd php php-mysql mariadb-server corosync pacemaker [root@node1 ~]# systemctl enable httpd [root@node1 ~]# systemctl enable mariadb
第三步：
配置node4主机的nfs服务器
[root@node4 ~]# cat /etc/exports /www 10.1.43.0/24(rw) /mysql10.1.43.0/24(rw,no_root_squash) [root@node4 ~]# setfacl -m u:apache:rwx /www #注意此处的apache帐号的uid和gid应该同node1-3主机上的apache帐号 [root@node4 ~]# chown mysql:mysql /mysql #注意此处的mysql帐号的uid和gid应该同node1-3主机上的mysql帐号 [root@node4 ~]# setfacl -m u:mysql:rwx /mysql #注意此处的mysql帐号的uid和gid应该同node1-3主机上的mysql帐号 [root@node4 ~]# ll -d /www /mysql drwxr-xr-x+ 6 mysql mysql 4096 Nov 24 19:05 /mysql drwxrwxr-x+ 6 root root 102 Nov 24 16:30 /www [root@node4 ~]# cat /www/index.html <h1>nfs Node</h1> [root@node4 ~]# systemctl start rpcbind [root@node4 ~]# systemctl start nfs
第四步：
配置/etc/corosync/corosync.conf配置文件，并生成authkey认证文件,并启动corosync和pacemeker服务
[root@node1 ~]# corosync-keygen #生成authkey认证文件 [root@node1 ~]# cat /etc/corosync/corosync.conf totem { version: 2 crypto_cipher: aes256 crypto_hash: sha1 interface { ringnumber: 0 bindnetaddr: 10.1.0.0 mcastaddr: 239.255.43.43 mcastport: 5405 ttl: 1 } } logging { fileline: off to_stderr: no to_logfile: yes logfile: /var/log/cluster/corosync.log to_syslog: yes timestamp: on logger_subsys { subsys: QUORUM debug: off } } quorum { provider: corosync_votequorum } nodelist { node { ring0_addr: node1 nodeid: 1 } node { ring0_addr: node2 nodeid: 2 } node { ring0_addr: node3 nodeid: 3 } } [root@node1 ~]# scp -p /etc/corosync/corocsync.conf nodeX:/etc/corosync #X=2-3 [root@node1 ~]# scp -p /etc/corosync/authkey nodeX:/etc/corosync #X=2-3 [root@node1 ~]# systemctl start corosync.service pacemaker.service注意：此处可以使用crm_mon、corosync-cfgtool、corosync-cmapctl | grep members等命令来查看corosync服务的运行状态
第五步：
在node1-3主机上配置crmsh软件，通过交互式的方式来配置corosync的高可用功能
注意：以下安装的软件包，来自教学的ftp服务器，没有的请自行百度下载安装
crmsh-2.1.4-1.1.x86_64.rpm
pssh-2.3.1-4.2.x86_64.rpm
python-pssh-2.3.1-4.2.x86_64.rpm
[root@node1 ~]# yum -y install ./crmsh-2.1.4-1.1.x86_64.rpm ./pssh-2.3.1-4.2.x86_64.rpm ./python-pssh-2.3.1-4.2.x86_64.rpm crmsh的配置： [root@node1 ~]# crm crm(live)# configure crm(live)configure# property stonith-enabled=false crm(live)configure# primitive webip ocf:IPaddr params ip="10.1.43.100" nic="eno16777736" cidr_netmask="16" \ broadcast="10.1.255.255" crm(live)configure# primitive webserver systemd:httpd op monitor interval=60s timeout=40s crm(live)configure# primitive mariadb systemd:mariadb op monitor interval=60s timeout=40s crm(live)configure# primitive webstore ocf:heartbeat:Filesystem params device="10.1.43.104:/www" \ directory="/var/www/html" fstype="nfs" op start timeout=60s op stop timeout=60s op monitor interval=60s timeout=40s crm(live)configure# primitive webmysql ocf:heartbeat:Filesystem params device="10.1.43.104:/mysql" \ directory="/var/lib/mysql" fstype="nfs" op start timeout=60s op stop timeout=60s op monitor interval=60s timeout=40s crm(live)configure# group webservice webstore webmysql mariadb webserver webip crm(live)configure# verity crm(live)configure# commitcrmsh的最终配置如下： crm(live)configure# show node 1: node1 \ attributes standby=on node 2: node2 \ attributes standby=off node 3: node3 \ attributes standby=off primitive mariadb systemd:mariadb \ op monitor interval=60s timeout=40s primitive webip IPaddr \ params ip=10.1.43.100 nic=eno16777736 cidr_netmask=16 broadcast=10.1.255.255 primitive webmysql Filesystem \ params device="10.1.43.104:/mysql" directory="/var/lib/mysql" fstype=nfs \ op start timeout=60s interval=0 \ op stop timeout=60s interval=0 \ op monitor interval=60s timeout=40s primitive webserver systemd:httpd \ op monitor interval=60s timeout=40s primitive webstore Filesystem \ params device="10.1.43.104:/www" directory="/var/www/html" fstype=nfs \ op start timeout=60s interval=0 \ op stop timeout=60s interval=0 \ op monitor interval=60s timeout=40s group webservice webstore webmysql mariadb webserver webip property cib-bootstrap-options: \ have-watchdog=false \ dc-version=1.1.13-10.el7-44eb2dd \ cluster-infrastructure=corosync \ stonith-enabled=false \ last-lrm-refresh=1479987027
第六步
安装好discuz软件，测试corosync的高可用
[root@node2 ~]# crm status Every 1.0s: crm status Thu Nov 24 21:33:34 2016 Last updated: Thu Nov 24 21:33:35 2016 Last change: Thu Nov 24 21:31:36 2016 by root via cibadmin on node1 Stack: corosync Current DC: node1 (version 1.1.13-10.el7-44eb2dd) - partition with quorum 3 nodes and 5 resources configured Online: [ node1 node2 node3 ] Resource Group: webservice webstore (ocf::heartbeat:Filesystem): Started node1 webmysql (ocf::heartbeat:Filesystem): Started node1 mariadb (systemd:mariadb):Started node1 webserver (systemd:httpd): Started node1 webip(ocf::heartbeat:IPaddr): Started node1访问网站
[root@node1 ~]# crm node standby #把node1节点手动设置为不可用 [root@node1 ~]# crm status #过段时候后，所有资源都转移到了node2节点，此实验成功 Every 1.0s: crm status Thu Nov 24 21:35:18 2016 Last updated: Thu Nov 24 21:35:21 2016 Last change: Thu Nov 24 21:34:50 2016 by root via crm_attribute on node1 Stack: corosync Current DC: node1 (version 1.1.13-10.el7-44eb2dd) - partition with quorum 3 nodes and 5 resources configured Node node1: standby Online: [ node2 node3 ] Resource Group: webservice webstore (ocf::heartbeat:Filesystem): Started node2 webmysql (ocf::heartbeat:Filesystem): Started node2 mariadb (systemd:mariadb):Started node2 webserver (systemd:httpd): Started node2 webip(ocf::heartbeat:IPaddr): Started node2刷新网站后，依旧可以访问
原创文章，作者：megedugao，如若转载，请注明出处：http://www.178linux.com/60703
