Nginx是一个高性能的Web和反向代理服务器，它具有很多非常优越的特性：
1、作为Web服务器。
2、作为负载均衡服务器。
3、作为邮件代理服务器。
4、安装及配置简单。
接下来我们介绍在docker构建nginx镜像：
Docker镜像构建分为两种方式：
- 手动构建
- Dockerfile（自动构建）
一、Docker镜像手动构建实例
基于centos镜像进行构建nginx镜像 #下载镜像 [root@compute ~]# docker pull centos [root@compute ~]# docker pull nginx [root@compute ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE docker.io/centos latest ff426288ea90 13 days ago 207.2 MB docker.io/nginx latest 3f8a4339aadd 3 weeks ago 108.5 MB #先创建centos镜像 [root@compute ~]# docker run --name nginxdocker -ti centos [root@10859f0ffd78 /]# yum install -y wget [root@10859f0ffd78 /]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo #安装nginx [root@10859f0ffd78 /]# yum install -y nginx [root@10859f0ffd78 /]# sed -i '3a daemon off;' /etc/nginx/nginx.conf [root@10859f0ffd78 /]# exit [root@compute ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 10859f0ffd78 centos "/bin/bash" 7 minutes ago Exited (0) 19 seconds ago nginxdocker #构建镜像 [root@compute ~]# docker commit -m "test Nginx" 10859f0ffd78 nginxdocker/nginxdocker:v1 sha256:616e9d624b9a1db8e23491db331228ca56dd60c04356da14ab6d7e4cf821d415 You have new mail in /var/spool/mail/root [root@compute ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginxdocker/nginxdocker v1 616e9d624b9a 10 seconds ago 383.9 MB #启动容器 [root@compute ~]# docker run --name nginxserver -d -p 82:80 nginxdocker/nginxdocker:v1 nginx c2ded9ce8af76c3b4862ca54478d39429879c856a2751957c9287df077dfcf17 [root@compute ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c2ded9ce8af7 nginxdocker/nginxdocker:v1 "nginx" 21 seconds ago Up 19 seconds 0.0.0.0:82->80/tcp nginxserver #测试 [root@compute ~]# curl -I 192.168.128.165:82 HTTP/1.1 200 OK Server: nginx/1.12.2 Date: Mon, 22 Jan 2018 08:15:39 GMT Content-Type: text/html Content-Length: 3700 Last-Modified: Wed, 18 Oct 2017 08:08:18 GMT Connection: keep-alive ETag: "59e70bf2-e74" Accept-Ranges: bytes
二、Docker镜像自动构建实例
Dockerfile是一个文本格式的配置文件，用户可以使用Dockerfile快速创建自定义的镜像。
Dockerfile由一行行命令语句组成，#号注释。分为：基础镜像信息、维护者信息、镜像操作指令和容器启动时执行指令。
#创建目录 [root@compute ~]# mkdir /dokerfile [root@compute ~]# cd /dokerfile/ [root@compute dokerfile]# mkdir nginx [root@compute dokerfile]# cd nginx/ #添加Dockerfile文件注意D大写 [root@compute nginx]# vim Dockerfile #This dockerfile uses the centos image #VERSION 2 - EDITION 1 #Author:jianlaihe #Command format: # 指定基于的基础镜像 FROM centos #维护者信息 MAINTAINER jianlaihe hejianlai@dnion.com #镜像的操作指令 RUN yum install -y wget RUN wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/re po/epel-7.repo RUN yum install -y nginx RUN echo "daemon off;" >>/etc/nginx/nginx.conf #添加文件需存在当前目录下 ADD index.html /usr/share/nginx/html/index.html EXPOSE 80 #容器启动时执行命令 CMD /usr/sbin/nginx [root@compute nginx]# echo "hello docker" >index.html #docker build命令构建镜像名为nginx版本v2 [root@compute nginx]# docker build -t nginx:v2 . Complete! ---> 5e37422db8b2 Removing intermediate container 87fa82c1173a Step 6 : RUN echo "daemon off;" >>/etc/nginx/nginx.conf ---> Running in a03da9a96436 ---> 236590c11b39 Removing intermediate container a03da9a96436 Step 7 : ADD index.html /usr/share/nginx/html/index.html ---> ac28fc354cad Removing intermediate container 5c2d9944e6f3 Step 8 : EXPOSE 80 ---> Running in 0b598a0680b8 ---> d4addb2c20ba Removing intermediate container 0b598a0680b8 Step 9 : CMD /usr/sbin/nginx ---> Running in d1feaede849f ---> 4905d9869aa7 Removing intermediate container d1feaede849f Successfully built 4905d9869aa7 [root@compute nginx]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx v2 4905d9869aa7 53 seconds ago 404.1 MB #启动容器 [root@compute nginx]# docker run --name testnginx -d -p 83:80 nginx:v2 b2cd72936465464bb8a88e9b3c5df0015241c7d17cb74062433ef79582c58908 #测试 [root@compute nginx]# curl 192.168.128.165:83 hello docker