Nginx keepalived（實現高可用）

這個是利用nginx+keepalived實現監聽nginx（也可以監聽其他服務）每台nginx伺服器都需要安裝keealived，有主有備，主nginx就安裝主keealived。具體安裝步驟後面有

yum install -y openssl openssl-devel（需要安裝乙個軟體包）

cd keepalived-1.2.18

./configure --prefix=/usr/local/keepalived

make

make install

第二步配置為開機啟動將keepalived安裝成linux系統服務，因為沒有使用keepalived的預設安裝路徑（預設路徑：/usr/local）,安裝完成之後，需要做一些修改工作：首先建立資料夾，將keepalived配置檔案進行複製：

mkdir /etc/keepalived cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ ln -s /usr/local/sbin/keepalived /usr/sbin/ ln -s /usr/local/keepalived/sbin/keepalived /sbin/ chkconfig keepalived on #設定開機啟動

第三步配置keealived

! configuration file for keepalived vrrp_script chk_nginx # 定義虛擬路由，vi_1 為虛擬路由的標示符，自己定義名稱 vrrp_instance vi_1 # 將 track_script 塊加入 instance 配置塊 track_script virtual_ipaddress

}

#!/bin/bash
a=`ps -c nginx –no-header |wc -l`
if [ $a -eq 0 ];then
/usr/local/nginx/sbin/nginx
sleep 2
if [ `ps -c nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fifi

chmod u+x nginx_check.sh

說明：到這裡所有的配置都進行完畢了，keepalived也加入了開機自啟動，開機時不用再去啟動nginx。測試時可以直接關閉nginx，然後發現nginx被keepalived通過指令碼自動啟動成功了，把主的伺服器關掉（或者keeppalived關掉），也可以通過虛擬ip進行訪問到從機，這就配置成功了

後面就可以結合負載均衡在centos上進行了

server location / .......

這樣配置過後，在nginx裡面通過keepalived的虛擬ip就可以實現負載均衡，實際環境中就是這樣執行的

Nginx keepalived（實現高可用）

nginx keepalived學習目錄

Nginx Keepalived 負載均衡

nginx keepalived雙機熱備

Nginx keepalived（實現高可用）

nginx keepalived學習目錄

Nginx Keepalived 負載均衡

nginx keepalived雙機熱備

相關推薦