heartbeat+ipvs+keepalived
1.高可用Heartbeat
Server1和server4安装资源包
heartbeat-3.0.4-2.el6.x86_64.rpm
heartbeat-devel-3.0.4-2.el6.x86_64.rpm
heartbeat-libs-3.0.4-2.el6.x86_64.rpm
ldirectord-3.9.5-3.1.x86_64.rpm
yum install -y heartbeat-*
[root@server1 ha.d]# cd /usr/share/doc/heartbeat-3.0.4/
[root@server1 heartbeat-3.0.4]# cp ha.cf authkeys haresources /etc/ha.d/
[root@server1 heartbeat-3.0.4]# cd /etc/ha.d
[root@server1 ha.d]# vim ha.cf
[root@server1 ha.d]# vim authkeys
[root@server1 ha.d]# chmod 600 authkeys
[root@server1 ha.d]# vim haresources
[root@server1 ha.d]# scp ha.cf authkeys haresources server4:/etc/ha.d
[root@server1 ha.d]# /etc/init.d/heartbeat start
Server4做相同的操作
[root@server4 ha.d]# /etc/init.d/heartbeat start
测试：
[root@server1 ha.d]# /etc/init.d/heartbeat stop
[root@server1 ha.d]# /etc/init.d/heartbeat start
1.ipvs负载均衡
首先停掉server1和server4上的heartbeat
Server1上的操作,并且server1做调度器
[root@server1 ~]# yum install -y ldirectord-3.9.5-3.1.x86_64.rpm
[root@server1 ~]# cd /usr/share/doc/ldirectord-3.9.5/
[root@server1 ldirectord-3.9.5]# cp ldirectord.cf /etc/ha.d
[root@server1 ~]# yum install -y ipvsadm
[root@server1 ~]# ipvsadm -L
[root@server1 ~]# ipvsadm -C ##清除规则
[root@server1 ~]# ipvsadm -A -t 172.25.6.100:80 -s rr ##rr表示采用轮询调度算法，添加新的虚拟ip
[root@server1 ~]# ip addr add 172.25.6.100/24 dev eth0
[root@server1 ~]# ip addr
[root@server1 ~]# ipvsadm -a -t 172.25.6.100:80 -r 172.25.6.2:80 -g ##添加新规则
[root@server1 ~]# ipvsadm -a -t 172.25.6.100:80 -r 172.25.6.3:80 -g
[root@server1 ~]# /etc/init.d/ipvsadm save ##保存添加的规则
[root@server1 ~]# ipvsadm -L ##显示内核中虚拟服务器列表
[root@server1 ~]# /etc/init.d/httpd restart
Server2上的操作
[root@server2 ~]# ip addr add 172.25.6.100/32 dev eth0
[root@server2 ~]# ip addr
[root@server2 ~]# yum install -y arptables_jf
[root@server2 html]# arptables -A IN -d 172.25.6.100 -j DROP
[root@server2 html]# arptables -A OUT -s 172.25.6.200 -j mangle --mangle-ip-s 172.25.6.2
[root@server2 html]# /etc/init.d/arptables_jf save
[root@server2 html]# /etc/init.d/httpd restart
Server3上的操作
[root@server3 ~]# /etc/init.d/httpd start
[root@server3 ~]# ip addr add 172.25.6.100/32 dev eth0 ##给内网网卡添加ip
[root@server3 ~]# ip addr
[root@server3 ~]# yum install -y arptables_jf
[root@server3 html]# arptables -A IN -d 172.25.6.100 -j DROP ##给这个地址追加策略
[root@server3 html]# arptables -A OUT -s 172.25.6.100 -j mangle --mangle-ip-s 172.25.6.3 ##追加策略，由100源地址跳到3上
[root@server3 ~]# /etc/init.d/arptables_jf save ##保存添加的策略
[root@server3 ~]# /etc/init.d/arptables_jf start
[root@server3 ~]# /etc/init.d/httpd restart
测试：
2.高可用与负载均衡
[root@server1 ~]# yum install -y ldirectord-3.9.5-3.1.x86_64.rpm
[root@server1 ~]# cd /etc/ha.d/
[root@server1 ha.d]# vim ldirectord.cf
[root@server1 ha.d]# ipvsadm -C ##清除策略
[root@server1 ha.d]# ipvsadm -L ##查看策略
[root@server1 ha.d]# ip addr del 172.25.6.100/24 dev eth0 ##删除内网网卡上的ip
[root@server1 ha.d]# vim haresources
[root@server1 ha.d]# scp haresources ldirectord.cf 172.25.6.4:/etc/ha.d/ ##server4上做与server1相同的操作
打开server4上的heartbeat替代server1的heartbeat
[root@server1 html]# /etc/init.d/httpd restart
测试：
如果server2和server3的httpd打开
如果server2和server3 httpd关闭，则访问heartbeat所在的主机
4.keepalived
关闭server1和server4的heartbeat，打开server2和server3的httpd
Server1上的操作
[root@server1 ~]# tar zxf keepalived-1.2.20.tar.gz
[root@server1 ~]#cd keepalived-1.2.20/
[root@server1 keepalived-1.2.20]# ./configure --prefix=/usr/local/keepalived/ ##解译到指定路径
[root@server1 keepalived-1.2.20]# make && make install
[root@server1 keepalived-1.2.20]# cd /usr/local/keepalived/
[root@server1 local]# scp -r keepalived/ 172.25.6.4:/usr/local/
[root@server1 sbin]#
ln -s /usr/local/keepalived/sbin/keepalived /sbin/
[root@server1 etc]# ln -s /usr/local/keepalived/etc/keepalived/ /etc/
[root@server1 sysconfig]#
ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@server1 sysconfig]#
ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[root@server1 init.d]# chmod +x keepalived
[root@server1 init.d]# cd /etc/keepalived/
[root@server1 keepalived]# ls
keepalived.conf samples
[root@server1 keepalived]# vim keepalived.conf
[root@server1 keepalived]# /etc/init.d/keepalived start
将修改的配置文件发送到server4同位置
Server4上的操作
[root@server4 keepalived]#
ln -s /usr/local/keepalived/sbin/keepalived /sbin/
[root@server4 keepalived]#
ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d
[root@server4 keepalived]#
chmod +x /usr/local/keepalived/etc/rc.d/init.d/keepalived
[root@server4 keepalived]#
ln -s /usr/local/keepalived/etc/sysconfig/keepalived /
etc/sysconfig/
[root@server4 keepalived]# /etc/init.d/keepalived start
[root@server4 keepalived]# mkdir /etc/keepalived/
将文件中的server1改为server4，state改为backup，
两者的virtual_router_id一定不同，server4的priority值小于server1的值
将keepalived进行重启
测试：
