Haproxy + Pacemaker 实现高可用负载均衡（二）
Pacemaker
server1 和 server2 均安装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.conf
34 service {
35 name: pacemaker
36 ver: 0
37 }
8 yum install -y pacemaker corosync
9 cp /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf
10 vim /etc/corosync/corosync.conf
# Please read the corosync.conf.5 manual page
compatibility: whitetank
totem {
version: 2
secauth: off
threads: 0
interface {
ringnumber: 0
bindnetaddr: 172.25.54.0
mcastaddr: 226.94.1.54
mcastport: 5405
ttl: 1
}
}
logging {
fileline: off
to_stderr: no
to_logfile: yes
to_syslog: yes
logfile: /var/log/cluster/corosync.log
debug: off
timestamp: on
logger_subsys {
subsys: AMF
debug: off
}
}
amf {
mode: disabled
}
service {
name: pacemaker
ver: 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安装管理工具，链接：crmsh and pssh
[root@server1 ~]# crm //进入管理界面
crm(live)# configure
crm(live)configure# show //查看默认配置
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#
在另一台服务器上我们也可以实施监控查看
Server2:
[root@server1 ~]# crm_mon //调出监控
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退出监控
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须保存一下，否则不生效
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 configured
Online: [ server1 server2 ][root@server2 rpmbuild]# crm_verify -VL //检查语法
- 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 ##设置为ignore做实验，这时即使一个节点挂掉了，另一个节点也会正常工作
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 //创建集群
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"删除资源时，要到resource层下查看该资源是否在工作，若在工作，停掉资源，再到configure层删除
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 //启用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 //内核崩溃
此时server2会自动接替server1的工作，而server1则会后台自动重启
待server1重启成功后，再重启corosync服务
