keepalived nginx 主備配置

nginx 不區分主備，在兩台服務上安裝兩個即可。

安裝參考：

keepalived 區分主備、多主多備的。

keepalived 多主多備 是把 單主單備 複製多份，調下優先順序配置即可。

安裝參考：

主備配置參考：

兩台伺服器（已按照1、2教程安裝）

ip.192.168.159.129

nginx 已安裝

keepalived 已安裝

ip.192.168.159.130

nginx 已安裝

keepalived 已安裝

192.168.159.129 （主）keepalived.conf

cd /etc/keepalived/

#進入預設配置目錄

vim keepalived.conf

#編輯配置資訊

謹記：該配置慎用空格，可以使用tab或回車排版，空格會被識別為賦值,導致keepalived執行失敗

修改為如下內容

! configuration file for keepalived

vrrp_script chk_nginx 
vrrp_instance vi_1 
track_script 
virtual_ipaddress 
}

cd /etc/keepalived/

#進入預設配置目錄

vim keepalived.conf

#編輯配置資訊

修改為以下內容

! configuration file for keepalived

vrrp_script chk_nginx 
vrrp_instance vi_1 
track_script 
virtual_ipaddress 
}

cd /etc/keepalived/script/

#無目錄，自己建立

vim nginx_chk.sh

編輯指令碼

新增如下內容

#!/bin/bash

if [ "
$(ps -c nginx --no-heading|wc -l)
" = "
0" ]; then
/usr/local/nginx/sbin/nginx
sleep
2if [ "
$(ps -c nginx --no-heading|wc -l)
" = "
0" ]; then
/etc/init.d/keepalived stop
fifi

192.168.159.130（備） nginx_chk.sh

cd /etc/keepalived/script/

#無目錄，自己建立

vim nginx_chk.sh

編輯指令碼

新增如下內容

#!/bin/bash

if [ "
$(ps -c nginx --no-heading|wc -l)
" = "
0" ]; then
/usr/local/nginx/sbin/nginx
sleep
2if [ "
$(ps -c nginx --no-heading|wc -l)
" = "
0" ]; then
/etc/init.d/keepalived stop
fifi

#賦值執行許可權 

1）停止nginx,nginx自動重啟成功

2）停止主keepalived,虛擬ip自動切換至備keepalived

3）訪問虛擬ip自動跳轉至nginx

4）其他測試不演練了

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