这篇文章主要介绍了nginx高可用集群的实现过程,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下 1、配置: (1)需要两台nginx服务器 (2)需要keepalived (3)需要虚拟ip 2、配置高可用的准备工作 (1)需要两台服务器192.168.180.113和192.168.180.112 (2)在两台服务器安装nginx (3)在两台服务器安装keepalived 3、在两台服务器安装keepalived (1)使用yum命令进行安装 (2)安装之后,在etc里面生成目录keepalived,有文件keepalived.conf [root@it.net.cn dev]# yum install keepalived -y 已加载插件:fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cn99.com * epel: ftp.riken.jp * extras: mirrors.cn99.com * updates: mirror.lzu.edu.cn gitlab_gitlab-ce/x86_64/signature | 836 B 00:00:00 gitlab_gitlab-ce/x86_64/signature | 1.0 kB 00:00:00 !!! gitlab_gitlab-ce-source/signature | 836 B 00:00:00 gitlab_gitlab-ce-source/signature | 951 B 00:00:00 !!! 正在解决依赖关系 --> 正在检查事务 ---> 软件包 keepalived.x86_64.0.1.3.5-16.el7 将被 安装 --> 正在处理依赖关系 libnetsnmpmibs.so.31()(64bit),它被软件包 keepalived-1.3.5-16.el7.x86_64 需要 --> 正在处理依赖关系 libnetsnmpagent.so.31()(64bit),它被软件包 keepalived-1.3.5-16.el7.x86_64 需要 --> 正在检查事务 ---> 软件包 net-snmp-agent-libs.x86_64.1.5.7.2-43.el7 将被 安装 --> 解决依赖关系完成 依赖关系解决 ========================================================================================================================================== Package 架构 版本 源 大小 ========================================================================================================================================== 正在安装: keepalived x86_64 1.3.5-16.el7 base 331 k 为依赖而安装: net-snmp-agent-libs x86_64 1:5.7.2-43.el7 base 706 k 事务概要 ========================================================================================================================================== 安装 1 软件包 (+1 依赖软件包) 总下载量:1.0 M 安装大小:3.0 M Downloading packages: (1/2): net-snmp-agent-libs-5.7.2-43.el7.x86_64.rpm | 706 kB 00:00:00 (2/2): keepalived-1.3.5-16.el7.x86_64.rpm | 331 kB 00:00:00 ------------------------------------------------------------------------------------------------------------------------------------------ 总计 1.8 MB/s | 1.0 MB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction 正在安装 : 1:net-snmp-agent-libs-5.7.2-43.el7.x86_64 1/2 正在安装 : keepalived-1.3.5-16.el7.x86_64 2/2 验证中 : keepalived-1.3.5-16.el7.x86_64 1/2 验证中 : 1:net-snmp-agent-libs-5.7.2-43.el7.x86_64 2/2 已安装: keepalived.x86_64 0:1.3.5-16.el7 作为依赖被安装: net-snmp-agent-libs.x86_64 1:5.7.2-43.el7 完毕! 4 、修改配置文件 2台都要换,一个主机,一个从机 [root@it.net.cn keepalived]# cat keepalived.conf global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.180.113 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_http_port { script "/usr/local/src/nginx_check.sh" interval 2 #(检测脚本执行的间隔) weight 2 } vrrp_instance VI_1 { state BACKUP # 备份服务器上将 MASTER 改为 BACKUP interface ens33 //网卡 virtual_router_id 51 # 主、备机的 virtual_router_id 必须相同 priority 40 # 主、备机取不同的优先级,主机值较大,备份机值较小 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.180.114 // VRRP H 虚拟地址 } } 脚本: [root@it.net.cn src]# cat nginx_check.sh #!/bin/bash A=`ps -C nginx ▒Cno-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 fi fi[root@it.net.cn src]# 把两台服务器上nginx和keepalived启动 启动nginx:./nginx 由于我112上安装了gitlab自带nginx,就不要启动了 启动keepalived:systemctl start keepalived.service 5、测试 把113的nginx和keepalived关掉,发现会切换到112上 (责任编辑:IT) |