1、安裝依賴包
yum -y install libnl libnl-devel yum install -y libnfnetlink libnfnetlink-devel rpm -ivhlibnfnetlink-1.0.0-1.el6.x86_64.rpm libnfnetlink-devel-1.0.0-1.el6.x86_64.rpm
2、安裝Keepalived
cd /app tar -zxfkeepalived-1.3.5.tar.gz cd/app/keepalived-1.3.5 ./configure make && makeinstall
3、安裝後配置開啓自啓動
cp /usr/local/etc/sysconfig/keepalived/etc/sysconfig/keepalived cp -r /usr/local/etc/keepalived/ /etc/ cp /app/keepalived-1.3.5/keepalived/etc/init.d/keepalived/etc/init.d/keepalived chkconfig --add keepalived chkconfig keepalived on
4、配置Keepalived
/etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected] #發生郵件目標地址
[email protected]
[email protected]
}
notification_email_from [email protected] #發生郵件源地址
smtp_server 192.168.200.1 #smtp服務器
smtp_connect_timeout 30
router_id LVS_DEVEL #機器標識，通常可設爲hostname。故障發生時，郵件通知會用到
## --------------------------------------------------
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script chk_http_port {
script "/usr/local/src/check_nginx_pid.sh" #監控服務腳步
interval 2 #檢測時間間隔(執行腳步間隔),每2s檢測一次
weight 2 #檢測失敗（腳本返回非0）則優先級 2,增減優先級
fall 2 #檢測連續 2 次失敗纔算確定是真失敗。會用weight減少優先級（1-255之間）
rise 1 #檢測 1 次成功就算成功。但不修改優先級
}
vrrp_instance VI_1 {
state MASTER #主備的區別點，標識 MASTER BACKUP
interface eth0 #對應的網卡
# mcast_src_ip 172.29.88.224 #發送多播數據包時的源IP地址,默認綁定網卡的IP
virtual_router_id 51 #主、備機的virtual_router_id必須相同
priority 100 #優先級，誰做主(值越大，優先級越高)
advert_int 2 #檢查間隔，默認爲1秒。這就是VRRP的定時器，MASTER每隔這樣一個時間間隔，就會發送一個advertisement報文以通知組內其他路由器自己工作正常
authentication { #定義認證方式和密碼，主從必須一樣
auth_type PASS
auth_pass 1111
}
track_interface { #監控的網卡。如果只監控服務，這裏可以不填
eth1
}
track_script { #以腳本爲監控chk_http_port是前面填寫的
chk_http_port
}
virtual_ipaddress { #虛擬IP地址,可以設置多個IP地址
10.252.3.165/24 dev eth0 label eth0:1
# 192.168.200.16
# 192.168.200.17
# 192.168.200.18
}
}/usr/local/src/check_nginx_pid.sh
## -----------------------------
# 該腳本檢測ngnix的運行狀態，並在nginx進程不存在時嘗試重新啓動ngnix，如果啓動失敗則停止keepalived，準備讓其它機器接管。
## -----------------------------
#!/bin/bash
counter=$(ps -C nginx --no-heading|wc -l)
if [ "${counter}" = "0" ]; then
/usr/local/bin/nginx
sleep 2
counter=$(ps -C nginx --no-heading|wc -l)
if [ "${counter}" = "0" ]; then
/etc/init.d/keepalived stop
fi
fi5、管理Keepalived
停止：
service keepalived stop
啓動：
service keepalived start
重啓：
service keepalived restart
重新加載配置文件：
service keepalived reload