Docker学习笔记1
Docker安装略运行环境centos7
先创建一个本地的目录
# mkdir nginx && cd nginx
下载示例的配置文件留着备用
# wget http://raw.githubusercontent.com/jamtur01/dockerbook-code/master/code/5/sample/nginx/global.conf
# 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
# vi Dockerfile
输入下面的内容
FROM ubuntu:14.04
MAINTAINER lilei "448117472@qq.com"
ENV REFRESHED_AT 2018-2-2
RUN apt-get update
RUN apt-get -y -q install nginx
RUN mkdir -p /var/www/html
ADD global.conf /etc/nginx/conf.d/
ADD nginx.conf /etc/nginx/nginx.conf
EXPOSE 80
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
# docker build -t lilei/nginx /nginx
Sending build context to Docker daemon 5.12 kB
Step 1/9 : FROM ubuntu:14.04
---> 8cef1fa16c77
Step 2/9 : MAINTAINER lilei "448117472@qq.com"
---> 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
Removing intermediate container e14a54a0cb76
Step 8/9 : ADD nginx.conf /etc/nginx/nginx.conf
---> b52578fa9810
Removing intermediate container 2203a47feb23
Step 9/9 : EXPOSE 80
---> Running in a938db4b48d1
---> 5e3141e91571
Removing intermediate container a938db4b48d1
Successfully built 5e3141e91571
创建完成后，用docker images查看所有镜像
# docker images
运行镜像
执行命令docker run运行此镜像
# 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。
# docker ps -l
CONTAINER ID 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hello world。
访问http://宿主IP:32768
http://i2.运维网.com/images/blog/201805/30/310ba7b8f8a43b64559c36fd2b284446.png
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
# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: lilei123
Password:
Login Succeeded
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
# docker push lilei123/nginx
The push refers to a repository
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: sha256:7a33a8bd719ff0fed4f75ba9f0b6e4963c88f6547039a92070ca5ff4ddc4289f size: 2828
Push完成后可以在页面上看到push上来的镜像
http://i2.运维网.com/images/blog/201805/30/75fd28dddf1da6c1f3afb6b41d7f8223.jpg
用docker pull 可以下载我们上传的镜像
# docker pull lilei123/nginx:1.0
Trying to 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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http://i2.运维网.com/images/blog/201805/30/55d145629cdd1bb4953929a03096816c.png
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