docker安裝和配置nginx

配置nginx

docker配置nginx

本機ip是192.168.0.200
docker pull nginx

配置nginx主機

vi /root/docker/nginx/nginx01.conf

寫入

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;
	
	upstream tomcat {
		server 192.168.0.200:8080;
		server 192.168.0.200:8081;
		server 192.168.0.200:8082;
	}
	server {
        listen       5050;
        server_name  192.168.0.200;
        location / {
            proxy_pass   http://tomcat;
            index  index.html index.htm;
        }
    }
}

docker運行:

docker run -d --net=host -v /root/docker/nginx/nginx01.conf:/etc/nginx/nginx.conf --name=n1 --privileged nginx

配置nginx備機

vi /root/docker/nginx/nginx02.conf

寫入

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;
	
	upstream tomcat {
		server 192.168.0.200:8080;
		server 192.168.0.200:8081;
		server 192.168.0.200:8082;
	}
	server {
        listen       5051;
        server_name  192.168.0.200;
        location / {
            proxy_pass   http://tomcat;
            index  index.html index.htm;
        }
    }
}

運行:

docker run -d --net=host -v /root/docker/nginx/nginx02.conf:/etc/nginx/nginx.conf --name=n2 --privileged nginx

配置 keepalived實現雙機熱備

配置前環境了解

• 虛擬ip: 192.168.0.201
• nginx主機ip: 192.168.0.200:5050
• nginx備機ip: 192.168.0.200:5051

配置主機

• 進入 docker 容器虛擬機

docker exec -it n1 bash

• 更新下apt

apt update

• 下載 keepalived

apt-get install keepalived -y

• 下載 vim

apt-get install vim -y

• 修改keepalived配置

vi /etc/keepalived/keepalived.conf

寫入配置

global_defs {
   # 路由id：當前安裝keepalived的節點主機標識符，保證全局唯一
   router_id keep_104
}

vrrp_instance VI_1 {
    # 表示狀態是MASTER主機還是備用機BACKUP
    state MASTER
    # 該實例綁定的網卡名稱
    interface ens33
    # 保證主備節點一致即可
    virtual_router_id 51
    # 權重，master權重一般高於backup，如果有多個，那就是選舉，誰的權重高，誰就當選
    priority 100
    # 主備之間同步檢查時間間隔，單位秒
    advert_int 2
    # 認證權限密碼，防止非法節點進入
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    # 虛擬出來的ip，可以有多個（vip）
    virtual_ipaddress {
        192.168.0.199
    }
}

virtual_server 192.168.0.199 5000 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.0.200 5050 {
        weight 1
    }
}

• 啟動keepalived

root@centOS:/# service keepalived start
[ ok ] Starting keepalived: keepalived.

配置備機

• 進入 docker 容器虛擬機

docker exec -it n2 bash

• 更新下apt

apt update

• 下載 keepalived

apt-get install keepalived -y

• 下載 vim

apt-get install vim -y

• 修改keepalived配置

vi /etc/keepalived/keepalived.conf

global_defs {
   router_id keep_105
}

vrrp_instance VI_1 {
    # 備用機設置為BACKUP
    state BACKUP
    interface ens33
    virtual_router_id 51
    # 權重低於MASTER
    priority 80
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        # 注意：主備兩台的vip都是一樣的，綁定到同一個vip
        192.168.0.199
    }
}

virtual_server 192.168.0.199 5000 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.0.200 5051 {
        weight 1
    }
}

• 啟動keepalived

root@centOS:/# service keepalived start
[ ok ] Starting keepalived: keepalived.

記得退出
exit

開啟docker容器內的ps指令: apt-get install procps -y

接下來我們可以知道
nginx配置的ip地址:

http://192.168.0.200:5050/renren-fast/swagger/index.html
http://192.168.0.200:5051/renren-fast/swagger/index.html

此時keepalivedIP地址和端口
192.168.0.199:5000
一主一備