起风网列举
列出本地主机上的镜像
[running]jihite@:~$ docker imagesREPOSITORY TAG IMAGE ID CREATED SIZEtest/ubuntu v1 80e674d9a004 18 minutes ago 64.2MB
参数：
repository: 镜像仓库源
TAG: 标签，版本概念，同一个镜像可以对应多个tag
REPOSITORY:TAG 来定义不同的镜像
获取一个镜像
docker pull ubuntu:13.10
下载到本地后，可以用这个镜像来创建容器
问题： 必须把镜像下载到本地才可以在本地执行容器？
查找
方式2：命令
[running]jihite@:~$ docker search ubuntuNAME DESCRIPTION STARS OFFICIAL AUTOMATEDubuntu Ubuntu is a Debian-based Linux operating sys… 10712 [OK] dorowu/ubuntu-desktop-lxde-vnc Docker image to provide HTML5 VNC interface … 411 [OK]rastasheep/ubuntu-sshd Dockerized SSH service, built on top of offi… 245 [OK]consol/ubuntu-xfce-vnc Ubuntu container with "headless" VNC session… 212 [OK]。。。
参数：STARTS 类似 Github 里面的 star, AUTOMATED: 自动构建
删除
docker rmi hello-world
创建
方式1：更新
使用已有镜像来创建一个容器
[running]jihite@:~$ docker run -t -i ubuntu:15.10 /bin/bash
root@8d4479f6e4b4:/#
上面的8d4479f6e4b4是容器的id
在运行的容器内使用 apt-get update 命令进行更新
docker commit -m="has update" -a="jihite" 8d4479f6e4b4 test/ubuntu:v2
此时在看镜像列表，已添加v2
[running]jihite@:~$ docker imagesREPOSITORY TAG IMAGE ID CREATED SIZEtest/ubuntu v2 c5535f23fb9e 5 minutes ago 137MBtest/ubuntu v1 80e674d9a004 55 minutes ago 64.2MB
方式2：构建
创建一个Dockerfile文件，内容
FROM centos:6.7MAINTAINER Fisher "fisher@sudops.com"RUN /bin/echo 'root:123456' |chpasswdRUN useradd runoobRUN /bin/echo 'runoob:123456' |chpasswdRUN /bin/echo -e "LANG=\"en_US.UTF-8\"" >/etc/default/localEXPOSE 22EXPOSE 80CMD /usr/sbin/sshd -D
每一个指令都会在镜像上创建一个新的层，每一个指令的前缀都必须是大写的
第一条FROM，指定使用哪个镜像源
RUN 指令告诉docker 在镜像内执行命令，安装了什么
CMD类似RUN命令，用于运行程序；RUN在docker build时执行，CMD在docker run时执行
然后，我们使用 Dockerfile 文件，通过 docker build 命令来构建一个镜像
[running]jihite@:~/soft/DOCKER$ docker build -t jihite/centos:6.7 .Sending build context to Docker daemon 2.048kBStep 1/9 : FROM centos:6.76.7: Pulling from library/centoscbddbc0189a0: Pull complete Digest: sha256:4c952fc7d30ed134109c769387313ab864711d1bd8b4660017f9d27243622df1Status: Downloaded newer image for centos:6.7 ---> 9f1de3c6ad53Step 2/9 : MAINTAINER Fisher "jihite@163.com" ---> Running in 89692984b2d9Removing intermediate container 89692984b2d9 ---> 7877c81fcad7Step 3/9 : RUN /bin/echo 'root:123456' |chpasswd ---> Running in 0045a6808289Removing intermediate container 0045a6808289 ---> e69b720625a7Step 4/9 : RUN useradd runoob ---> Running in d6922cef70ffRemoving intermediate container d6922cef70ff ---> 34126187e790Step 5/9 : RUN /bin/echo 'runoob:123456' |chpasswd ---> Running in 66ae11b70d74Removing intermediate container 66ae11b70d74 ---> 1910f1148a66Step 6/9 : RUN /bin/echo -e "LANG=\"en_US.UTF-8\"" >/etc/default/local ---> Running in e3af343f786fRemoving intermediate container e3af343f786f ---> 1dde7508d315Step 7/9 : EXPOSE 22 ---> Running in bdb74d714320Removing intermediate container bdb74d714320 ---> cb9d1e155251Step 8/9 : EXPOSE 80 ---> Running in 5458130fc48aRemoving intermediate container 5458130fc48a ---> 8ed17c39c39eStep 9/9 : CMD /usr/sbin/sshd -D ---> Running in a8133ae92d3aRemoving intermediate container a8133ae92d3a ---> f9f4b6664e1dSuccessfully built f9f4b6664e1dSuccessfully tagged jihite/centos:6.7
设置标签
docker tag f9f4b6664e1d jihite/centos:dev
再看
[running]jihite@:~/soft/DOCKER$ docker imagesREPOSITORY TAG IMAGE ID CREATED SIZEjihite/centos 6.7 f9f4b6664e1d 2 hours ago 191MBjihite/centos dev f9f4b6664e1d 2 hours ago 191MB
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