Coreosync传递信息
pacemaker高可用资源管理器
操作系统：CENTOS7
1、两台机分别关闭防火墙和SELINUX
setenforce 0
systemctl disable firewalld.service
systemctl stop firewalld.service
[root@centos7s ~]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three two values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
2、同步时间，SSH双机互信（略）
ntpdate 193.168.120.60
3、双机安装corosync和pacemaker
yum install -y pacemaker pcs psmisc policycoreutils-pythonsystemctl enable pcsd.service
systemctl enable pcsd.service
systemctl restart pcsd.service
双机设好密码一致 passwd hacluster
在其中一台执行群集认证即可：pcs cluster auth centos7s cons7s
输入上面的帐号和密码
pcs cluster setup --start --name mycluster centos7s cons7s 执行此群集同步命令后，会修改如下文件
[root@centos7s ~]# cat /etc/corosync/corosync.conf
totem {
version: 2
cluster_name: mycluster
secauth: off
transport: udpu
}
nodelist {
node {
ring0_addr: centos7s
nodeid: 1
}
node {
ring0_addr: cons7s
nodeid: 2
}
}
quorum {
provider: corosync_votequorum
two_node: 1
}
logging {
to_logfile: yes
logfile: /var/log/cluster/corosync.log
to_syslog: yes
开机启动群集
pcs cluster enable --all
pcs property set no-quorum-policy=ignore 双节点忽略quorum功能
pcs property set stonith-enabled=false 禁用stonith设备
pcs resource create VIP ocf:heartbeat:IPaddr2 ip=193.168.120.125 cidr_netmask=24 op monitor interval=30s 配置共享IP
修改APACHE配置文件：
[root@centos7s ~]# tail -n 20 /etc/httpd/conf/httpd.conf
# Defaults if commented: EnableMMAP On, EnableSendfile Off
#
#EnableMMAP off
EnableSendfile on
<Location /server-status>
SetHandler server-status
Order deny,allow
allow from all
</Location>
# Supplemental configuration
#
# Load config files in the "/etc/httpd/conf.d" directory, if any.
IncludeOptional conf.d/*.conf
pcs resource create web-server1 apache configfile="/etc/httpd/conf/httpd.conf" statusurl="http://127.0.0.1/server-status"
pcs constraint colocation add web-server1 VIP INFINITY
pcs constraint order VIP then web-server1
pcs status 查看状态
此时关闭正在运行http服务的主机，http服务自动在另一台机启动，可以用群集的VIP访问测试
