Pacemaker

• server1 和 server2 均安裝pacemaker 和 corosync

server1 和 server2 作相同配置

[root@server1 ~]# yum install -y pacemaker corosync [root@server1 ~]# cp /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf [root@server1 ~]# vim /etc/corosync/corosync.conf34 service {35 name: pacemaker36 ver: 037 }8 yum install -y pacemaker corosync9 cp /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf10 vim /etc/corosync/corosync.conf # Please read the corosync.conf.5 manual page compatibility: whitetanktotem {version: 2secauth: offthreads: 0interface {ringnumber: 0bindnetaddr: 172.25.54.0mcastaddr: 226.94.1.54mcastport: 5405ttl: 1} }logging {fileline: offto_stderr: noto_logfile: yesto_syslog: yeslogfile: /var/log/cluster/corosync.logdebug: offtimestamp: onlogger_subsys {subsys: AMFdebug: off} }amf {mode: disabled } service {name: pacemakerver: 0 }

[root@server1 ~]# yum install -y crmsh-1.2.6-0.rc2.2.1.x86_64.rpm pssh-2.3.1-2.1.x86_64.rpm安裝管理工具，鏈接：crmsh and pssh

[root@server1 ~]# crm //進入管理界面 crm(live)# configure crm(live)configure# show //查看默認配置 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" crm(live)configure# 在另一臺服務器上我們也可以實施監控查看 Server2: [root@server1 ~]# crm_mon //調出監控 Last updated: Sat Aug 4 15:07:13 2018 Last change: Sat Aug 4 15:00:04 2018 via crmd on server1 Stack: classic openais (with plugin) Current DC: server1 - partition with quorum Version: 1.1.10-14.el6-368c726 2 Nodes configured, 2 expected votes 0 Resources configured //ctrl+c退出監控server1 crm(live)configure# property stonith-enabled=false //禁掉fence crm(live)configure# commit //保存

注意：每次修改完策略都必須保存一下，否則不生效

server2 Last updated: Sat Aug 4 15:09:55 2018 Last change: Sat Aug 4 15:09:27 2018 via cibadmin on server1 Stack: classic openais (with plugin) Current DC: server1 - partition with quorum Version: 1.1.10-14.el6-368c726 2 Nodes configured, 2 expected votes 0 Resources configuredOnline: [ server1 server2 ]

[root@server2 rpmbuild]# crm_verify -VL //檢查語法

• 添加VIP

crm(live)configure# primitive vip ocf:heartbeat:IPaddr2 params ip=172.25.54.100 cidr_netmask=24 op monitor interval=1min crm(live)configure# commit

[root@server1 ~]# /etc/init.d/corosync stop Signaling Corosync Cluster Engine (corosync) to terminate: [ OK ] Waiting for corosync services to unload:.. [ OK ] [root@server1 ~]#

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

[root@server1 ~]# crm crm(live)# configure crm(live)configure# show node server1 node server2 primitive vip ocf:heartbeat:IPaddr2 \params ip="172.25.54.100" cidr_netmask="24" \op monitor interval="1min" property $id="cib-bootstrap-options" \dc-version="1.1.10-14.el6-368c726" \cluster-infrastructure="classic openais (with plugin)" \expected-quorum-votes="2" \stonith-enabled="false" crm(live)configure# property no-quorum-policy=ignore ##設置為ignore做實驗，這時即使一個節點掛掉了，另一個節點也會正常工作 crm(live)configure# commit crm(live)configure# bye bye [root@server1 ~]# [root@server1 ~]# /etc/init.d/corosync stop Signaling Corosync Cluster Engine (corosync) to terminate: [ OK ] Waiting for corosync services to unload:. [ OK ] [root@server1 ~]#

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

[root@server1 ~]# crm crm(live)# configure crm(live)configure# primitive haproxy lsb:haproxy op monitor interval=1min crm(live)configure# commit crm(live)configure#

crm(live)configure# group hagroup vip haproxy //創建集群 crm(live)configure# commit crm(live)configure#

[root@server2 ~]# crm configure show node server1 node server2 \attributes standby="off" primitive haproxy lsb:haproxy \op monitor interval="1min" primitive vip ocf:heartbeat:IPaddr2 \params ip="172.25.54.100" cidr_netmask="24" \op monitor interval="1min" group hagroup vip haproxy property $id="cib-bootstrap-options" \dc-version="1.1.10-14.el6-368c726" \cluster-infrastructure="classic openais (with plugin)" \expected-quorum-votes="2" \stonith-enabled="false" \no-quorum-policy="ignore"

刪除資源時，要到resource層下查看該資源是否在工作，若在工作，停掉資源，再到configure層刪除

Fence

• server1 和 server2
  yum install fence-virt-0.2.3-15.el6.x86_64 -y

[root@server1 ~]# ll /etc/cluster/ total 4 -rw-r--r-- 1 root root 128 Aug 4 16:18 fence_xvm.key [root@server1 ~]# [root@server2 ~]# ll /etc/cluster/ total 4 -rw-r--r-- 1 root root 128 Aug 4 16:20 fence_xvm.key [root@server2 ~]# crm crm(live)# configure crm(live)configure# property stonith-enabled=true //啟用fence crm(live)configure# primitive vmfence stonith:fence_xvm params pcmk_host_map="server1:vm1;server2:vm2" op monitor interval=1min crm(live)configure# commit crm(live)configure# bye bye [root@server2 ~]#

[root@server1 ~]# [root@server1 ~]# echo c >/proc/sysrq-trigger //內核崩潰

此時server2會自動接替server1的工作，而server1則會后臺自動重啟
待server1重啟成功后，再重啟corosync服務

總結

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