Haproxy+Keepalive服務器

Haproxy+Keepalive服務器

1. 環境準備，具體內容如下
   a) Haproxy版本：Haproxy-1.4.21
   b) keepalived版本：keepalived v1.2.1
   c) Haproxy:10.206.35.251（master）
   d) Haproxy:10.206.35.251（backup）
2. Haproxy安裝，master和backup服務器安裝Haproxy
   a) 安裝Haproxy
   cd /usr/src
   wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.21.tar.gz
   
   cd haproxy-1.4.21
   make TARGET=linux26 PREFIX=/usr/local/haproxy/
   
   make install PREFIX=/usr/local/haproxy
   
   b) 配置haproxy
   cd /usr/local/haproxy/
   mkdir -p etc/
   
   touch /usr/local/haproxy/etc/haproxy.cfg
   vi /usr/local/haproxy/etc/haproxy.cfg
   haproxy.cfg配置信息如下
   global
   log 127.0.0.1 local0
   log 127.0.0.1 local1 notice
   chroot /usr/local/haproxy
   uid 99
   gid 99
   daemon
   pidfile /usr/local/haproxy/haproxy.pid
   defaults
   log 127.0.0.1 local3
   mode http
   option httplog
   option httpclose
   option dontlognull
   option forwardfor
   retries 2
   option redispatch
   balance source
   stats uri /web-status
   contimeout 5000
   clitimeout 50000
   srvtimeout 50000
   listen jfe.com
   bind *:80
   mode http
   option httplog
   log global
   option httpchk HEAD /index.htmp HTTP/1.0
   server web1 10.206.35.251:80 weight 5 check inter 2000 rise 2 fall 3
   server web1 10.206.35.251:80 weight 5 check inter 2000 rise 2 fall 3
   c) 啓動Haproxy服務，代碼如下
   /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/etc/haproxy.cfg
   報錯提示
   
   停掉nginx
   
   
3. Haproxy配置文件詳解
   

3. 安裝Keepalived安裝配置
   下載安裝包
   wget http://www.keepalived.org/software/keepalived-1.2.1.tar.gz
   解壓安裝包
   tar -zxvf keepalived-1.2.1.tar.gz
   進入安裝目錄
   cd keepalived-1.2.1
   報錯提示
   configure: error: Popt libraries is required
   解決辦法
   yum install popt-devel -y
   
   make編譯
   
   make install
   
   設置安裝目錄變量
   DIR=/usr/local/
   拷備啓動文件到自動啓動
   cp $DIR/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
   cp $DIR/etc/sysconfig/keepalived /etc/sysconfig/
   創建目錄
   mkdir -p /etc/keepalived
   cp $DIR/sbin/keepalived /usr/sbin/
4. 配置Keepalived，兩臺服務器keepalived.conf內容都配置如下 ，
   vi /usr/local/etc/keepalived/keepalived.conf
   添加以下內容
   vrrp_script chk_haproxy{
   script "/data/sh/check_haproxy.sh"
   interval 2
   weight 2
   }
   修改以下內容
   
   #VIP1
   vrrp_instance VI_1 {
   state MASTER
   interface eth0
   lvs_sync_daemon_inteface eth0
   virtual_router_id 151
   priority 100
   advert_int 5
   authentication {
   auth_type PASS
   auth_pass 1111
   }
   virtual_ipaddress {
   10.206.35.253
   }
   trackscript {
   chk haproxy
   }
   }
   BACKUP:
   global_defs {
   notification_email {br/>[email protected]
   [email protected]br/>[email protected]
   }
   notification_email_from [email protected]
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   }
   vrrp_script chk_haproxy {
   script "/data/sh/check_haproxy.sh"
   interval 2
   weight 2
   }
   #VIP1
   vrrp_instance VI_1 {
   state BACKUP
   interface eth0
   lvs_sync_daemon_inteface eth0
   virtual_router_id 151
   priority 90
   advert_int 5
   authentication {
   auth_type PASS
   auth_pass 1111
   }
   virtual_ipaddress {
   10.206.35.253
   }
   track_script {
   chk_haproxy
   }
   
5. 創建check_ haproxy腳本
   haproxy.sh腳本內容如下：
   創建目錄
   mkdir -p /data/sh/
   創建腳本文件
   touch /data/sh/check_haproxy.sh
   chmod +x check_haproxy.sh
   vi /data/sh/check_haproxy.sh
   #!/bin/bash
   #auto check nginx process
   #2019.9.3
   #by author jay
   killall -0 haproxy
   if
   [[ $? -ne 0 ]]; then
   /etc/init.d/keepalived stop
   fi
6. 檢查相應服務是否啓動
   a)
   b)
7. 在兩臺haproxy+keepalived服務器發佈目錄分別新建index.html測試頁面，然後啓動Nginx服務器測試，訪問VIP地址：http://10.206.35.188
8. 檢查主備服務器Haproxy服務是否啓用
   Master
   http://10.206.35.251/web-status
   
   Backup
   http://10.206.35.252/web-status
   
9. 測試keepalive自動切換功能
   手動kill其中一臺的Haproxy進程，另一臺後臺日誌顯示如下，並且訪問VIP正常訪問，證明Haproxy+keepalived高可用架構配置完畢。