KeepAlived+Nginx 安裝

yum install -y gcc gcc-c++ openssl openssl-devel

目前keepalived最新版本下載：
[root@rhel ~]#wget -c http://www.keepalived.org/software/keepalived-1.2.12.tar.gz
[root@rhel ~]# tar zxvf keepalived-1.2.12.tar.gz
[root@rhel ~]# cd keepalived-1.2.12
安裝編譯環境：
[root@rhel ~]# yum install -y gcc gcc-c++ openssl openssl-devel
1

//指定安裝路徑
[root@rhel keepalived-1.2.12]# ./configure --prefix=/usr/local/keepalived --sysconf=/etc 

[root@rhel keepalived-1.2.12]# make && make install //安裝
將keepalived命令軟鏈接到/usr/bin下
[root@rhel keepalived-1.2.12]# ln -s /usr/local/keepalived/sbin/keepalived /usr/bin/keepalived

添加啓動腳本且方便用service keepalived start/stop/restart管理(若是沒有init.d/keepalived則從源碼目錄拷貝)
[root@rhel keepalived-1.2.12]# cp /keepalived/keepalived-2.0.8/keepalived/etc/init.d/keepalived /etc/init.d/keepalived
[root@rhel keepalived-1.2.12]# chmod 755 /etc/init.d/keepalived //添加執行權限
[root@rhel keepalived-1.2.12]# chkconfig keepalived on //開機啓動

修改/etc/init.d/keepalived中的程序路徑
# Source configuration file (we set KEEPALIVED_OPTIONS there)
. /etc/sysconfig/keepalived

改成：
# Source configuration file (we set KEEPALIVED_OPTIONS there)
. /keepalived/keepalived-2.0.8/keepalived/etc/sysconfig/keepalived

默認狀況下，keepalived 會讀取 /etc/keepalived 下keepalived.conf 文件
若是沒有創建這個文件，keepalived也不會報錯，可是會發現，所建立的關於keepalived的相關參數根本就沒有生效。
[root@rhel keepalived-1.2.12]# mkdir /etc/keepalived
[root@rhel keepalived-1.2.12]# ln -s /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

 

keepalived.conf

! Configuration File for keepalived

global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}

vrrp_script Monitor_Nginx {
script "/monitor_nginx.sh"
interval 2
weight 2
}

vrrp_instance VI_1 {
state MASTER
interface ens192
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}

track_script {
Monitor_Nginx #(調用nginx進程檢測腳本)
}

virtual_ipaddress {
172.16.9.30
}

}

 

monitor_nginx.sh

#!/bin/bash

if [ "$(ps -ef | grep "nginx: master process"| grep -v grep )" == "" ]

then

killall keepalived

fi

 

chmod 777 /monitor_nginx.sh

sed -i 's/\r$//' /monitor_nginx.sh

啓動測試：
[root@rhel keepalived-1.2.12]# service keepalived restart
中止 keepalived： [肯定]
啓動 keepalived： [肯定]

安裝完成

service keepalived restart
service keepalived stop
service keepalived start

systemctl start keepalivedsystemctl restart keepalivedsystemctl stop keepalived