3.Docker - 镜像管理

一、使用容器生成镜像

1.进入容器,安装软件包(任意包)

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bash-3.2# docker ps -a CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                   PORTS               NAMES 96d50d4ae5e4        centos              "/bin/bash"         2 hours ago         Exited (0) 2 hours ago                       desperate_hopper bash-3.2# docker start 96d50d4ae5e4     #启动容器 bash-3.2# docker exec -it 96d50d4ae5e4 /bin/bash       #进入容器 96d50d4ae5e4# yum -y install net-tools wget vim 96d50d4ae5e4# exit

2.提交新的镜像

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bash-3.2# docker commit -m "centos_with_nettools_and_wget_vim" -a "90root" 96d50d4ae5e4 new_centos:01 b064581f65d5c5e21ae10568c274804a12ff59bce4e8c7c740274e3f432f938a ### -m: 改动信息     -a: 作者信息     96d50d4ae5e4: 这一串为容器ID     new_centos:01 新镜像的名字 bash-3.2# docker images REPOSITORY          TAG                 IMAGE ID            CREATED              VIRTUAL SIZE new_centos          01                  b064581f65d5        About a minute ago   279.3 MB 90root              90root              2a332da70fd1        2 weeks ago          196.7 MB centos              latest              2a332da70fd1        2 weeks ago          196.7 MB

二、基于本地模块创建镜像

1.模版获取,直接到openva官网下载(https://openvz.org/Download/template/precreated)

1	bash-3.2# wget http://download.openvz.org/template/precreated/centos-6-x86_64-minimal.tar.gz

2.导入模版

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bash-3.2# cat centos-6-x86_64-minimal.tar.gz |docker import - centos-6-x86_minimal bash-3.2# docker images REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE centos-6-x86_minimal   latest              4cc6c9327f19        16 seconds ago      326.3 MB

3.镜像导出/导入

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bash-3.2# docker save -o new_centos.tar b064581f65d5        #导出 bash-3.2# docker load --input new_centos.tar    #导入 bash-3.2# docker load < new_centos.tar      #导入 ### 以上两种导入方法,二选一. ### 演示镜像导入 bash-3.2# docker images REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE centos-6-x86_minimal   latest              4cc6c9327f19        12 minutes ago      326.3 MB new_centos             01                  b064581f65d5        42 minutes ago      279.3 MB bash-3.2# docker rmi b064581f65d5 Untagged: new_centos:01 Deleted: b064581f65d5c5e21ae10568c274804a12ff59bce4e8c7c740274e3f432f938a bash-3.2# docker load < new_centos.tar bash-3.2# docker images <none>                 <none>              b064581f65d5    9 months ago        0 B bash-3.2# docker tag b064581f65d5 new_centos:01     #改名

4.将镜像上传到dockerhub官网(需要注册用户)

1	bash-3.2# docker push image_name