LINUX下haproxy+keepalived的配置

前面记录了HAProxy的简单配置，这次配置haproxy+keepalived，实现对haproxy的容错

系统环境：

193.168.120.71 HAPROXY服务器 keepalived主节点

193.168.120.72 HAPROXY服务器 keepalived备份节点

193.168.120.91 WEB服务器

193.168.120.60 WEB服务器

分别在193.168.120.71， 193.168.120.72 安装haproxy,

使用脚本安装：

[root@racnode2 shell]# cat 1.sh
yun install gcc -y
tar -zxvf /shared/soft/tar.gz/haproxy-1.8.3.tar.gz -C /tmp
cd /tmp/haproxy-1.8.3
a=`uname -a`
c=`echo $a|cut -d " " -f3`
d=`echo $c|cut -d "." -f1`
e=`echo $c|cut -d "." -f2`
f=`echo $c|cut -d "." -f3`
g=`echo $f|cut -d "-" -f1`
h=$d$e$g #此处得到了四位的LINUX内核版本号
make TARGET=$h PREFIX=/data/haproxy
make install PREFIX=/data/haproxy
cp -r /data/haproxy/sbin/haproxy /usr/sbin/
cp -r ./examples/haproxy.init /etc/init.d/haproxy
chmod 755 /etc/init.d/haproxy
egrep "^haproxy" /etc/passwd >& /dev/null
if [ $? -ne 0 ]
then
useradd -r haproxy
fi

接下来修改/etc/rsyslog.conf、创建/etc/haproxy/haproxy.cfg ,并启动服务，如上一篇文章所示

再接下来安装配置keepalived，仍然是在193.168.120.71， 193.168.120.72 安装

[root@racnode2 shell]# cat 3.sh
#!/bin/bash
yum install -y wget make gcc openssl-devel popt-devel
tar -zxvf /shared/soft/tar.gz/keepalived-1.2.8.tar.gz -C /tmp/
cd /tmp/keepalived-1.2.8
./configure --prefix=/usr/local/keepalived
make
make install
cp -r /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp -r /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp -r /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
mkdir -p /etc/keepalived/
chmod +x /etc/init.d/keepalived

此处两台机器相同

keepalived主节点的配置文件如下：

[root@racnode1 keepalived]# cat /etc/keepalived/keepalived.conf
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "/etc/keepalived/chk_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100 #BACKUP 99
advert_int 1
mcast_src_ip 193.168.120.71 #MASTER SERVER IP
authentication {
auth_type PASS
auth_pass 111111
}
track_script {
chk_haproxy
}
virtual_ipaddress {
193.168.120.70 #VIP
}
}

keepalived备份节点的配置文件如下：

[root@racnode2 shell]# cat /etc/keepalived/keepalived.conf
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "/etc/keepalived/chk_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 99 #BACKUP 99
advert_int 1
mcast_src_ip 193.168.120.72 #BACKUP SERVER IP
authentication {
auth_type PASS
auth_pass 111111
}
track_script {
chk_haproxy
}
virtual_ipaddress {
193.168.120.70 #VIP
}
}

两台机器的/etc/keepalived/chk_haproxy.sh一致，

chmod a+x /etc/keepalived/chk_haproxy.sh

[root@racnode2 shell]# cat /etc/keepalived/chk_haproxy.sh
#!/bin/bash
if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then
/etc/init.d/haproxy start
fi
sleep 2
if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then
/etc/init.d/keepalived stop
fi

此时再分别启动两台机器的服务：

service haproxy start

service keepalived start

访问测试：

LINUX下haproxy+keepalived的配置

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