前言

部署了三个nginx用于前端项目, 并使用keepalived部署好热备, 所以总共有5个nginx

创建好nginx的文件和配置

根据上面的指令创建好目录

mkdir /home/web/nginx01
mkdir /home/web/nginx02
mkdir /home/web/nginx03

• nginx.conf配置文件

这里我配置了三个nginx节点

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    proxy_redirect          off;
    proxy_set_header        Host $host;
    proxy_set_header        X-Real-IP $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
    client_max_body_size    10m;
    client_body_buffer_size   128k;
    proxy_connect_timeout   5s;
    proxy_send_timeout      5s;
    proxy_read_timeout      5s;
    proxy_buffer_size        4k;
    proxy_buffers           4 32k;
    proxy_busy_buffers_size  64k;
    proxy_temp_file_write_size 64k;

    server {
        listen 6501;
        server_name  192.168.0.200;
        location / {
            root   /home/web/nginx/renren-vue;
            index  index.html index.htm;
        }
    }
}

前面的差别不大, 就后面这一点不太一样

server {
    listen 6501;
    server_name  192.168.0.200;
    location / {
        root   /home/web/nginx/renren-vue;
        index  index.html index.htm;
    }
}

server {
    listen 6502;
    server_name  192.168.0.200;
    location / {
        root   /home/web/nginx/renren-vue;
        index  index.html index.htm;
    }
}

server {
    listen 6503;
    server_name  192.168.0.200;
    location / {
        root   /home/web/nginx/renren-vue;
        index  index.html index.htm;
    }
}

docker配置指令

docker run -it -d --name=web01 --net=host \
-v /home/web/nginx01/nginx.conf:/etc/nginx/nginx.conf \
-v /home/web/nginx01:/home/web/nginx/renren-vue \
--user=root --privileged=true nginx

docker run -it -d --name=web02 --net=host \
-v /home/web/nginx02/nginx.conf:/etc/nginx/nginx.conf \
-v /home/web/nginx02:/home/web/nginx/renren-vue \
--user=root --privileged=true nginx

docker run -it -d --name=web03 --net=host \
-v /home/web/nginx03/nginx.conf:/etc/nginx/nginx.conf \
-v /home/web/nginx03:/home/web/nginx/renren-vue \
--user=root --privileged=true nginx

利用keepalived配置热备方案

配置主机keepalived

• 进入容器 docker exec -it bn01 bash
• 更新 apt update
• 安装vim apt install vim
• 安装keepalived apt install keepalived
• 修改配置文件 vi /etc/keepalived/keepalived.conf
• 写入配置文件

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 52
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.0.160
    }
}
virtual_server 192.168.0.160 6701 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.0.200 6601 {
        weight 1
    }
}

• 启动 service keepalived start
• 验证 docker top bn01 看下keepalived进程是否运行, 如果运行再访问 http://192.168.0.160:6701/#/home 看下是否能够访问

配置备机

• 进入容器 docker exec -it bn02 bash
• 更新 apt update
• 安装vim apt install vim
• 安装keepalived apt install keepalived
• 修改配置文件 vi /etc/keepalived/keepalived.conf
• 写入配置文件

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 52
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.0.160
    }
}
virtual_server 192.168.0.160 6701 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.0.200 6602 {
        weight 1
    }
}

• 启动 service keepalived start
• 验证 docker top bn02 看下keepalived进程是否存在, 如果存在则 http://192.168.0.160:6701/#/home 看下是否能够访问

现在停止掉主机, 然后稍等一会儿再看看是否能够运行 exit 退出docker容器 执行docker stop bn01停止掉主机

可能需要判断下, docker logs bn01 和 docker logs bn02 看下最近一次访问是否, 我这里发现是备机在运行, 所以实际上我执行的是docker stop bn02

发现访问http://192.168.0.160:6701/#/home网址还是没问题

这里需要等待几分钟, 可改等待时间

成功部署热备

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