Docker安装略
运行环境centos7
先创建一个本地的目录
[root@localhost /]# mkdir nginx &&cd nginx
下载示例的配置文件留着备用
[root@localhostnginx]# wget http://raw.githubusercontent.com/jamtur01/dockerbook-code/master/code/5/sample/nginx/global.conf
[root@localhostnginx]# wget http://raw.githubusercontent.com/jamtur01/dockerbook-code/master/code/5/sample/nginx/nginx.conf
创建一个Dockerfile
注意文件名一定要写正确
[root@localhostnginx]# vi Dockerfile
输入下面的内容
FROMubuntu:14.04
MAINTAINERlilei "[email protected]"
ENVREFRESHED_AT 2018-2-2
RUNapt-get update
RUNapt-get -y -q install nginx
RUNmkdir -p /var/www/html
ADDglobal.conf /etc/nginx/conf.d/
ADDnginx.conf /etc/nginx/nginx.conf
EXPOSE80
制作镜像
然后执行docker build进行镜像的制作，这里注意后面的/nginx文件夹，如果有加，可能会报push image denied requested access to the resource is denied错误
[root@localhostnginx]# docker build -t lilei/nginx /nginx
Sendingbuild context to Docker daemon 5.12 kB
Step 1/9: FROM ubuntu:14.04
---> 8cef1fa16c77
Step 2/9: MAINTAINER lilei "[email protected]"
---> Using cache
---> 7013e02dde1c
Step 3/9: ENV REFRESHED_AT 2018-2-2
---> Using cache
---> a4cdf457c1b2
Step 4/9: RUN apt-get update
---> Using cache
---> e87bf1be2cc2
Step 5/9: RUN apt-get -y -q install nginx
---> Using cache
---> fef2d696c4bc
Step 6/9: RUN mkdir -p /var/www/html
---> Using cache
---> 838bdc0fafb0
Step 7/9: ADD global.conf /etc/nginx/conf.d/
---> b6f6d5de2a9f
Removingintermediate container e14a54a0cb76
Step 8/9: ADD nginx.conf /etc/nginx/nginx.conf
---> b52578fa9810
Removingintermediate container 2203a47feb23
Step 9/9: EXPOSE 80
---> Running in a938db4b48d1
---> 5e3141e91571
Removingintermediate container a938db4b48d1
Successfullybuilt 5e3141e91571
创建完成后，用docker images查看所有镜像
[root@localhostwebsite]# docker images
运行镜像
执行命令docker run运行此镜像
[root@localhostnginx]# docker run -d -p 80 --name website \
> -v$PWD/website:/var/www/html/website \
>lilei123/nginx nginx
执行docker ps –l查看网站的端口，可以看到对外映射的端口是32768。
[root@localhostnginx]# docker ps -l
CONTAINERID IMAGE COMMAND CREATED STATUS PORTS NAMES
60f9f90b1f87 lilei/nginx "nginx" 2 minutes ago Up 2 minutes 0.0.0.0:32768->80/tcp website
在宿主机的/nginx/website目录下添加index.html文件，输入helloworld。
发布镜像
先在https://hub.docker.com上注册一个帐号，然后在本地登录到hub上
如果未登录，会报denied: requested access to the resource is denied错误
[root@localhostwebsite]# docker login
Login withyour Docker ID to push and pull images from Docker Hub. If you don't have aDocker ID, head over to https://hub.docker.com to create one.
Username:lilei123
Password:
LoginSucceeded
然后执行push操作，注意镜像的名称要符合格式：注册用户名/镜像名
可以用docker tag IMAGEID(镜像id) REPOSITORY:TAG（仓库：标签）修改镜像名称
[root@localhostwebsite]# docker push lilei123/nginx
The pushrefers to a repository [docker.io/lilei123/nginx]
7f92bc2c1763:Pushed
4348d854faed:Pushed
b10190830b1e:Pushed
f1f90a01ed71:Pushed
7d48d55701f7:Pushed
98bb41f25d33:Pushed
0404d129c384:Pushed
5081cf9eb266:Pushed
f9dfc87a2e75:Pushed
ed9fd767a1ff:Pushed
0fea3c8895d3:Pushed
d626a8ad97a1:Pushed
1.0:digest: sha256:7a33a8bd719ff0fed4f75ba9f0b6e4963c88f6547039a92070ca5ff4ddc4289fsize: 2828
Push完成后可以在页面上看到push上来的镜像
用docker pull 可以下载我们上传的镜像
[root@localhostwebsite]# docker pull lilei123/nginx:1.0
Tryingto pull repository docker.io/lilei123/nginx ...
1.0:Pulling from docker.io/lilei123/nginx
如果本地存在会报已存在的错误，不过也可以证明我们的镜像是可以用的。
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