Docker安装Nginx并配置多域名站点

#### 官方镜像仓库

[https://hub.docker.com/](https://hub.docker.com/)

在镜像仓库中搜索nginx镜像,在TAGS处可以找到nginx镜像的诸多版本

#### 从仓库拉取对应版本镜像

（方法一）拉取最新版本的镜像
```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker pull nginx
```

（方法二）拉取对应版本的镜像，后面加上冒号版本号，如:1.14.2

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker pull nginx:1.14.2
```
#### 如下我已经把镜像拉下来了

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker pull nginx:1.14.2
1.14.2: Pulling from library/nginx
f7e2b70d04ae: Pull complete 
8ea93d21cb9d: Pull complete 
a74f30594b35: Pull complete 
Digest: sha256:1102570fde8b2cd20034357e1fb59266e8ea23185f8c7ea2ab563d586c1d81dc
Status: Downloaded newer image for nginx:1.14.2

```

#### 查看已有的镜像
```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker images
```
#### 如下返回结果可以看出我这已经拉有多个镜像下来了

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker images
REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
nginx                     1.14.2              e706cb01fa6b        12 days ago         109MB
mysql                     5.6                 a876cc5d29e4        4 months ago        256MB
elasticsearch             5.6.12              de05e10fa879        4 months ago        486MB
elasticsearch             latest              5acf0e8da90b        5 months ago        486MB
hello-world               latest              4ab4c602aa5e        6 months ago        1.84kB
elasticsearch             2.4.6               5e9d896dc62c        6 months ago        479MB
mobz/elasticsearch-head   5                   b19a5c98e43b        2 years ago         824MB

```
#### 先创建一个临时的Nginx容器

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker run --name nginx20190317 -d nginx:1.14.2
```
然后再将容器中的/etc/nginx/nginx.conf 配置文件复制一份到宿主服务器中，这里我复制的是到我的/usr/local/nginx/nginx.conf 目录中，如果/usr/local目录中没有nginx这个目录的话先手动创建这个目录，在/usr/local目录下执行创建目录命令：mkdir nginx

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker cp nginx20190317:/etc/nginx/nginx.conf /usr/local/nginx/nginx.conf

```
执行完上面的命令可以看到/usr/local/nginx/目录下已经有了nginx.conf这个配置文件

#### 查看正在运行的容器

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker ps 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                            NAMES
8e8b1cbd4a34        nginx:1.14.2        "nginx -g 'daemon of…"   3 seconds ago       Up 3 seconds        80/tcp                                           nginx20190317
54695bd7dbbe        de05e10fa879        "/docker-entrypoint.…"   3 months ago        Up 3 months         0.0.0.0:9200->9200/tcp, 0.0.0.0:9300->9300/tcp   ES20181209
c158ba6c451d        mysql:5.6           "docker-entrypoint.s…"   3 months ago        Up 3 months         0.0.0.0:3306->3306/tcp                           mysql

```
#### 把正在运行的Nginx容器删除掉，因为这个是没有挂载文件和映射端口号的，我们需要重新运行一个

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker rm -f 8e8b1cbd4a34
```
#### 重新运行一个新的Nginx容器

```
[root@izwz90ajic0vbwm6zwdw5dz /]# docker run -p 80:80 --name nginx20190317 -v /usr/local/nginx/nginx.conf:/etc/nginx/nginx.conf:ro -d nginx:1.14.2

```
#### 然后我们修改宿主机/usr/local/nginx/nginx.conf配置文件
可以看到nginx.conf文件内容是这样的

```
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;

include /etc/nginx/conf.d/*.conf;
}
```
#### 我们在后面添加自己的配置，注：先把最后默认的配置注释掉

```
#include /etc/nginx/conf.d/*.conf;
```
#### 最终配置文件是这样的

```
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;

#include /etc/nginx/conf.d/*.conf;

server {
        listen       80;
        server_name  www.java7788.com;

location / {
		proxy_pass http://宿主机的ip:8080;
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }

server {
        listen       80;
        server_name  blog.java7788.com;

location / {
		proxy_pass http://宿主机的ip:8081;
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}
```
#### 这里我配置了两个站点
一个是 www.java7788.com ;另一是 blog.java7788.com
如果还需要更多站点复制server改一下就好了