docker 学习1

系统：centos7
内核版本：inux localhost.localdomain 3.10.0-327.10.1.el7.x86_64 #1 SMP Tue Feb 16 17:03:50 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
参考：

1. docker 安装

curl -fsSL https://get.docker.com/ | sh
sudo service docker start
ps -ef |grep docker
root      11882      1  1 02:35 ?        00:00:38 /usr/bin/docker daemon -H fd://
lujj      16828  10761  0 03:28 pts/0    00:00:00 grep --color=auto docker
sudo docker run hello-world

2. 镜像和容器
    Docker Engine provides the core Docker technology that enables images and containers. As the last step in your installation, you ran the Engine docker run hello-world command. With this one command, you completed the core tasks to using Engine. The command you ran had three parts.
  

   A container is a stripped-to-basics version of a Linux operating system. An image is software you load into a container. When you ran the command, the Engine software:

• checked to see if you had the hello-world software image
• downloaded the image from the Docker Hub (more about the hub later)
• loaded the image into the container and “ran” it

   A Docker image, though, is capable of much more. An image can start software as complex as a database, wait for you (or someone else) to add data, store the data for later use, and then wait for the next person.

Who built the hello-world software image though? In this case, Docker did but anyone can. Docker Engine lets people (or companies) create and share software through Docker images. Using Docker Engine, you don’t have to worry about whether your computer can run the software in a Docker image — a Docker container can always run it.

3.  查找运行whalesay 镜像   
  docker run docker/whalesay cowsay boo-boo
4. 创建自己的镜像
 

mkdir ~/dockerbuild
cd ~/dockerbuild
touch Dockerfile
cat >Dockerfile1 <
FROM docker/whalesay:latest
RUN apt-get -y update && apt-get install -y fortunes
CMD /usr/games/fortune -a | cowsay
EOF
docker build -t docker-whale .
docker images
REPOSITORY                     TAG                 IMAGE ID            CREATED             SIZE
docker-whale                   latest              8dcf3d51d4dc        2 hours ago         255.7 MB
hello-world                    latest              690ed74de00f        5 months ago        960 B
docker/whalesay                latest              6b362a9f73eb        9 months ago        247 MB
docker run docker-whale

  docker-whale 新建镜像的名称

5. Create a Docker Hub Account & repository
6. 标记、推送、拉取镜像
 

docker images
REPOSITORY                       TAG                     IMAGE ID                 CREATED SIZE
docker-whale                   latest  8dcf3d51d4dc 2 hours ago         255.7 MB
hello-world                    latest              690ed74de00f        5 months ago        960 B
docker/whalesay                latest              6b362a9f73eb        9 months ago        247 MB

  8dcf3d51d4dc 镜像ID
  1）使用镜像ID 和docker tag 命令 标记镜像
 
  docker tag 8dcf3d51d4dc  docker27014/docker-whale:latest
  docker tag imageID hubAccountID/imageName:tags

docker images
REPOSITORY                     TAG                 IMAGE ID            CREATED SIZE
docker-whale                   latest              8dcf3d51d4dc        2 hours ago         255.7 MB
docker27014/docker-whale   latest              8dcf3d51d4dc        2 hours ago         255.7 MB
hello-world                    latest              690ed74de00f        5 months ago        960 B
docker/whalesay                latest              6b362a9f73eb        9 months ago        247 MB

  2）命令行登录docker hub
   

docker login --username=yourhubusername --email=[e-mail]

  3) 推送镜像

docker push docker27014/docker-whale

  推送成功后，删除本地镜像
 

docker rmi -f 8dcf3d51d4dc
docker rmi -f docker-whale

  3） 从本人资源库拉取镜像

docker run docker27014/docker-whale