keepalived+nginx+tomcat搭建高效能web伺服器叢集

標籤：keepalived+nginx+tomcat 高效能 高可用 web伺服器叢集

使用keepalived+nginx+tomcat搭建高效能web伺服器叢集，系統採用centos6.9，前端用nginx做反向 Proxy實現負載平衡，同時結合keepalived對nginx實現高可用，後端使用兩台tomcat做動態jsp解析，實現了動靜分離。

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搭建環境

準備四台伺服器 
vip: 192.168.75.130
master: 192.168.75.131 (安裝nginx做反向 Proxy實現負載勻衡，結合keepalived實現高可用）
backup: 192.168.75.132 (同上)
web1: 192.168.75.151 (安裝nginx和tomcat實現動靜分離)
web2: 192.168.75.152 (同上)
這裡為節省服器，nginx和tomcat和裝在了一台服務上，也可以分開配置。

配置步驟如下：

四台伺服器分別安裝好nginx
安裝方法參見：LNMP環境搭建

web1，web2上分別安裝好tomcat

安裝方法參見：Tomcat8.5的安裝配置

web1, web2上分別啟動nginx和tomcat
service nginx start
service tomcat start

在master和backup上配置nginx：

vi /usr/local/nginx/conf/nginx.conf

加入或修改以下內容：

    upstream web_nginx {
        #ip_hash;
        server 192.168.75.151;
        server 192.168.75.152;
    }

upstream web_tomcat {
    server 192.168.75.151:8080;
    server 192.168.75.152:8080;
}

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            proxy_pass      http://web_nginx/;
            proxy_set_header Host   $host;
            proxy_set_header X-Real-IP      $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location ~ \.jsp$ {
            proxy_pass   http://web_tomcat;
        }

分別在master和backup上啟動nginx服務

service nginx start

在master和backup上分別安裝keepalived
yum install -y keepalived

配置master
vi /etc/keepalived/keepalived.conf
清空原文，加入如下內容：
! Configuration File for keepalived

global_defs {
   notification_email {
     #[email protected]
     #[email protected]
     #[email protected]
   }
   #notification_email_from [email protected]
   #smtp_server 192.168.200.1
   #smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_script chk_http_port {
    script "</dev/tcp/127.0.0.1/80"
    interval 1
    weight -2
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.75.130
    }
    track_script {
        chk_http_port
    }
}

配置backup
scp 192.168.75.131:/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

vi /etc/keepalived/keepalived.conf
backup的設定檔只需要修改
state MASTER  -> state BACKUP
priority 100 -> priority 99

最後，分別在master和backup上啟動keepalived服務，先主後備
/etc/init.d/keepalived start

keepalived+nginx+tomcat搭建高效能web伺服器叢集