RHCS套件实现web的高可用（ricci+luci）

RHCS(Red Hat Cluster Suite)也就是红帽集群套件，RHCS是一个能够提供高可用性、高可靠性、负载均衡、存储共享且经济廉价的集群工具集合，它将集群系统中三大集群架构融合一体，可以给web应用、数据库应用等提供安全、稳定的运行环境。
RHCS提供了集群系统中三种集群构架，分别是高可用性集群、负载均衡集群、存储集群。

1.配置更高级的yum源

在rhcs1上配置

vim /etc/yum.repos.d/rhel-source.repo

[HighAvailability]
name=HighAvailability
baseurl=http://172.25.80.250/rhel6.5/HighAvailability
gpgcheck=0

[LoadBalancer]
name=LoadBalancer
baseurl=http://172.25.80.250/rhel6.5/LoadBalancer
gpgcheck=0

[ResilientStorage]
name=ResilientStorage
baseurl=http://172.25.80.250/rhel6.5/ResilientStorage
gpgcheck=0

[ScalableFileSystem]
name=ScalableFileSystem
baseurl=http://172.25.80.250/rhel6.5/ScalableFileSystem
gpgcheck=0

scp /etc/yum.repos.d/rhel-source.repo root@172.25.80.2:/etc/yum.repos.d/		#再把yum配置传给另一台rhcs2

2.在rhcs1上安装ricci、luci,并设置开机自启

yum install ricci luci -y

设置ricci用户密码为redhat

[root@rhcs1 ~]# id ricci
uid=140(ricci) gid=140(ricci) groups=140(ricci)
[root@rhcs1 ~]# passwd ricci
Changing password for user ricci.
New password: 
BAD PASSWORD: it is based on a dictionary word
BAD PASSWORD: is too simple
Retype new password: 
passwd: all authentication tokens updated successfully.

开启服务，设置开机自启

/etc/init.d/ricci start
/etc/init.d/luci start
chkconfig ricci on
chkconfig luci on
chkconfig --list		#查询自启列表

3.在rhcs2上安装ricci并设置自启

yum install ricci luci -y
[root@rhcs2 ~]# id ricci
uid=140(ricci) gid=140(ricci) groups=140(ricci)
[root@rhcs2 ~]# passwd ricci
Changing password for user ricci.
New password: 
BAD PASSWORD: it is based on a dictionary word
BAD PASSWORD: is too simple
Retype new password: 
passwd: all authentication tokens updated successfully.
/etc/init.d/ricci start
chkconfig ricci on

4.测试

在浏览器中输入https://172.25.80.1:8084
需要添加证书

登陆后添加集群


创建时rhcs1和rhcs2会重启

5.在rhcs1和2上查看文件是否生成

[root@rhcs1 ~]# cd /etc/cluster/
[root@rhcs1 cluster]# ls                                                        
cluster.conf  cman-notify.d
cat cluster.conf
clustat			##查看集群

6.在真机上下载软件，制作钥匙

yum search fence
yum install fence-virtd.x86_64 fence-virtd-libvirt.x86_64 fence-virtd-multicast.x86_64 -y
mkdir /etc/cluster/
cd /etc/cluster/
dd if=/dev/urandom of=/etc/cluster/fence_xvm.key bs=128 count=1		#制作钥匙
[root@foundation80 cluster]# ls
fence_xvm.key

7.将生成的钥匙发送给rhcs1和rhcs2

scp fence_xvm.key root@172.25.80.1:/etc/cluster/
scp fence_xvm.key root@172.25.80.2:/etc/cluster/

8.开启服务

systemctl start fence_virtd.service
systemctl status fence_virtd.service

9.在浏览器进行配置

10.在真机重启服务

systemctl restart fence_virtd.service

测试：在rhcs1

fence_node rhcs2				#server2会重启

11.rhcs1和2打开httpd服务

yum install httpd -y
/etc/init.d/httpd start
vim /var/www/html/index.html
rhcs1

12.在浏览器设置脚本

13.测试

此时rhcs1和rhcs2都正常，但rhcs1优先级高，所以httpd在rhcs1开启

测试1：模拟rhcs1内核故障

 echo c >/proc/sysrq-triggerWrite

测试2：将rhcs2的httpd服务关闭

.测试3：将rhcs1的网络关闭，模拟网络故障