Linux for CentOS 下的 keepalived 安裝與卸載以及相關命令操作之詳細教程

百度百科解釋：

        keepalived 是一個類似於 layer3, 4 & 7 交換機制的軟件，也就是我們平時說的第 3 層、第 4 層和第 7 層交換。Keepalived 的作用是檢測 web 服務器的狀態，如果有一台 web服務器死機，或工作出現故障，keepalived 將檢測到，並將有故障的 web 服務器從系統中剔除，當web服務器工作正常后 keepalived 自動將 web 服務器加入到服務器群中，這些工作全部自動完成，不需要人工干涉，需要人工做的只是修復故障的 web 服務器。

1、安裝

• 方法一：yum 方式
  1. yum 安裝

     #安裝依賴包
      yum install -y curl gcc openssl-devel libnl3-devel net-snmp-devel
     #yum安裝軟件
      yum install -y keepalived

• 2. 初始化及啟動

     systemctl start keepalived   //啟動 keepalived
     systemctl enable keepalived  //加入開機啟動 keepalived
     systemctl restart keepalived  //重新啟動 keepalived
     systemctl status keepalived   //查看 keepalived 狀態

   方法二：源碼包

1.mkdir /opt/software    #建立一個目錄，用來存放軟件包

2.cd /opt/software        #切換到該目錄下

3.wget https://www.keepalived.org/software/keepalived-2.0.20.tar.gz   #聯網下載，也可以windows下載好，上傳進來

4.tar xvf keepalived-2.0.20.tar.gz

5.mv keepalived-2.0.20.tar.gz   /usr/local/src

6.cd /usr/local/src/keepalived-2.0.20 

 7. 

      yum install -y curl gcc openssl-devel libnl3-devel net-snmp-devel

      yum -y install openssl openssl-devel

      yum -y install libnl libnl-devel

      yum -y install libnfnetlink-devel

8.完成后會在以下路徑生成：

/usr/local/keepalived/
/usr/local/keepalived/bin /usr/local/keepalived/etc /usr/local/keepalived/sbin /usr/local/keepalived/share ---------------
---------------
/usr/local/keepalived/etc/keepalived/keepalived.conf /usr/local/keepalived/etc/sysconfig/
/usr/local/keepalived/sbin/keepalived

9.初始化啟動   

# keepalived 啟動腳本變量引用文件，默認文件路徑是 /etc/sysconfig/，也可以不做軟鏈接，直接修改啟動腳本中文件路徑即可（安裝目錄下）
[root@localhost /]# cp /usr/local/keepalived/etc/sysconfig/keepalived  /etc/sysconfig/keepalived 
 
# 將keepalived 主程序加入到環境變量（安裝目錄下）
[root@localhost /]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/keepalived
 
# keepalived 啟動腳本（源碼目錄下），放到 /etc/init.d/ 目錄下就可以使用 service 命令便捷調用
[root@localhost /]# cp /usr/local/src/keepalived-2.0.20/keepalived/etc/init.d/keepalived  /etc/init.d/keepalived
 
# 將配置文件放到默認路徑下
[root@localhost /]# mkdir /etc/keepalived
[root@localhost /]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

 

                              

• 加為系統服務：           chkconfig   --add keepalived
• 開機啟動：                  chkconfig keepalived on
• 查看開機啟動的服務：chkconfig --list
• 啟動、關閉、重啟 :      service keepalived start|stop|restart

 

卸載

 卸載keeplived工作路徑

[root@localhost /]# cd /usr/local/src/keepalived      #源碼所在目錄（根據實際情況進入對應目錄）
[root@localhost keepalived]#make uninstall 

刪除相關文件，有時系統版本差異，刪除的時候，先查看該路徑是否存在文件，以免刪除錯誤，要仔細了。不要復制我的路徑

                     

#刪除keepalived
[root@localhost /]# rm -f /usr/local/keepalived/sbin/keepalived
[root@localhost /]# rm -f /usr/local/keepalived/etc/rc.d/init.d/keepalived
[root@localhost /]# rm -f /usr/local/keepalived/etc/sysconfig/keepalived
[root@localhost /]# rm -rf /usr/local/keepalived/etc/keepalived
[root@localhost /]# rm -f /usr/local/keepalived/bin/genhash
[root@localhost /]# rm -rf /usr/local/keepalived
[root@localhost /]# rm -rf /etc/keepalived
[root@localhost /]# rm -f /etc/rc.d/init.d/keepalived
[root@localhost /]# rm -f /usr/sbin/keepalived 
[root@localhost /]# rm -f /etc/sysconfig/keepalived
[root@localhost /]# rm -f /etc/systemd/system/multi-user.target.wants/keepalived.service

測試是否卸載成功

[root@localhost /]# serive keepalived satrt
[root@localhost /]# systemctl start keepalived

當命令無效時，證明卸載成功。


相關操作命令

centOs：

          [root@localhost /]# systemctl start keepalived   -- 啟動
          [root@localhost /]# systemctl stop keepalived   --關閉
          [root@localhost /]# ps aux|grep keepalived   --查看進程          



linux：
          [root@localhost /]# service  keepalived start  -- 啟動
          [root@localhost /]# service keepalived stop    --關閉
          [root@localhost /]# ps aux|grep keepalived   --查看進程