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| 环境准备：
[Jack@test101 base]$ docker run -d --name app1 -p 10023:22 pcnk/base:v2
[Jack@test101 base]$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c10446ab9620 pcnk/base:v2 "/usr/bin/supervisor 9 seconds ago Up 7 seconds 0.0.0.0:10023->22/tcp app1
[Jack@test101 base]$ docker commit -m "ssh,supervisor" -a "pcnk" c10446ab9620 base:latest
29e0b4550969220103e7179df62f31f3f1345a364c4fb103f73a5ba3b6f8fc5d
[Jack@test101 base]$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
base latest 29e0b4550969 About a minute ago 251.3 MB
一、container的导入导出
保存：
[Jack@test101 base]$ docker export app1 >/home/datacenter/docker/containers/app1.tar
删除：
[Jack@test101 base]$ docker stop app1
app1
[Jack@test101 base]$ docker rm app1
app1
恢复：
[Jack@test101 base]$ cat /home/datacenter/docker/containers/app1.tar |docker import - base_import
c9761ff46cf1ff3e0f1de04ed2fcf52b0b591b6fd0ea943611f2066046a17aae
[Jack@test101 base]$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
base_import latest c9761ff46cf1 15 seconds ago 228.1 MB
website/sync latest 1bda5d872bf7 About an hour ago 508 MB
pcnk/base v2 064aa35dfcef 7 hours ago 251.3 MB
centos centos7 fd44297e2ddb 2 weeks ago 215.7 MB
centos latest fd44297e2ddb 2 weeks ago 215.7 MB
centos 7 fd44297e2ddb 2 weeks ago 215.7 MB
[Jack@test101 base]$ docker images -tree
Warning: '-tree' is deprecated, it will be removed soon. See usage.
├─c9761ff46cf1 Virtual Size: 228.1 MB Tags: base_import:latest
└─6941bfcbbfca Virtual Size: 0 B
└─41459f052977 Virtual Size: 215.7 MB
└─fd44297e2ddb Virtual Size: 215.7 MB Tags: centos:7, centos:centos7, centos:latest
└─751a85a0d00b Virtual Size: 215.7 MB
└─19b009f08542 Virtual Size: 228.1 MB
└─420cb9e73c70 Virtual Size: 251.3 MB
└─e97f94a79de0 Virtual Size: 251.3 MB
└─fde06c761bde Virtual Size: 251.3 MB
└─dbfae1099999 Virtual Size: 251.3 MB
└─064aa35dfcef Virtual Size: 251.3 MB Tags: pcnk/base:v2
└─b41b76b51e1a Virtual Size: 505.9 MB
└─1bda5d872bf7 Virtual Size: 508 MB Tags: website/sync:latest
没有之前的层的信息，变成了独立的一层：
├─c9761ff46cf1 Virtual Size: 228.1 MB Tags: base_import:latest
二、images的导入导出
注：据文档解释，这种方式，不会丢失提交历史和层，可以回滚，但，目前尚未操作过回滚。
保存：
[Jack@test101 base]$ docker save base > /home/datacenter/docker/images/base.tar
删除：
[Jack@test101 base]$ docker rmi 29e0b4550969
Untagged: base:latest
Deleted: 29e0b4550969220103e7179df62f31f3f1345a364c4fb103f73a5ba3b6f8fc5d
恢复：
[Jack@test101 base]$ docker load </home/datacenter/docker/images/base.tar
[Jack@test101 base]$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
base_import latest c9761ff46cf1 About a minute ago 228.1 MB
base latest 29e0b4550969 17 minutes ago 251.3 MB
website/sync latest 1bda5d872bf7 About an hour ago 508 MB
pcnk/base v2 064aa35dfcef 7 hours ago 251.3 MB
centos 7 fd44297e2ddb 2 weeks ago 215.7 MB
centos centos7 fd44297e2ddb 2 weeks ago 215.7 MB
centos latest fd44297e2ddb 2 weeks ago 215.7 MB
[Jack@test101 base]$ docker images --tree
Warning: '--tree' is deprecated, it will be removed soon. See usage.
├─c9761ff46cf1 Virtual Size: 228.1 MB Tags: base_import:latest
└─6941bfcbbfca Virtual Size: 0 B
└─41459f052977 Virtual Size: 215.7 MB
└─fd44297e2ddb Virtual Size: 215.7 MB Tags: centos:latest, centos:7, centos:centos7
└─751a85a0d00b Virtual Size: 215.7 MB
└─19b009f08542 Virtual Size: 228.1 MB
└─420cb9e73c70 Virtual Size: 251.3 MB
└─e97f94a79de0 Virtual Size: 251.3 MB
└─fde06c761bde Virtual Size: 251.3 MB
└─dbfae1099999 Virtual Size: 251.3 MB
└─064aa35dfcef Virtual Size: 251.3 MB Tags: pcnk/base:v2
├─29e0b4550969 Virtual Size: 251.3 MB Tags: base:latest
└─b41b76b51e1a Virtual Size: 505.9 MB
└─1bda5d872bf7 Virtual Size: 508 MB Tags: website/sync:latest
恢复出来的image，还是有原来的层的信息：
├─29e0b4550969 Virtual Size: 251.3 MB Tags: base:latest
三、查看history可以观察到这个image的build过程
[Jack@test101 base]$ docker history base_import
IMAGE CREATED CREATED BY SIZE
c9761ff46cf1 41 minutes ago 228.1 MB
[Jack@test101 base]$ docker history base
IMAGE CREATED CREATED BY SIZE
29e0b4550969 57 minutes ago 699 B
064aa35dfcef 8 hours ago /bin/sh -c #(nop) ENTRYPOINT [/usr/bin/superv 0 B
dbfae1099999 8 hours ago /bin/sh -c #(nop) COPY file:b96e75ea47b2d1c16 41 B
fde06c761bde 8 hours ago /bin/sh -c set -x && /bin/sed -i 's/. 12.99 kB
e97f94a79de0 8 hours ago /bin/sh -c #(nop) ADD file:0cce39ed9dc5d31da4 807 B
420cb9e73c70 8 hours ago /bin/sh -c rpm -ivh http://dl.fedoraproject.o 23.25 MB
19b009f08542 8 hours ago /bin/sh -c yum -y update; yum clean all 12.41 MB
751a85a0d00b 8 hours ago /bin/sh -c #(nop) MAINTAINER pcnk 0 B
fd44297e2ddb 2 weeks ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0 B
41459f052977 2 weeks ago /bin/sh -c #(nop) ADD file:be2a22bb15fbbbf24b 215.7 MB
6941bfcbbfca 2 weeks ago /bin/sh -c #(nop) MAINTAINER The CentOS Proje 0 B
[Jack@test101 base]$ docker history --help
Usage: docker history [OPTIONS] IMAGE
Show the history of an image
--help=false Print usage
--no-trunc=false Don't truncate output
-q, --quiet=false Only show numeric IDs
[Jack@test101 base]$ docker history --no-trunc=true base
IMAGE CREATED CREATED BY SIZE
29e0b4550969220103e7179df62f31f3f1345a364c4fb103f73a5ba3b6f8fc5d 58 minutes ago 699 B
064aa35dfcef778713ad1b4cc02add4e8e48425741768595d7b5909961f74cee 8 hours ago /bin/sh -c #(nop) ENTRYPOINT [/usr/bin/supervisord] 0 B
dbfae1099999316cc130ac467768e6c957a98682076b659642d0d8c5ec7587e2 8 hours ago /bin/sh -c #(nop) COPY file:b96e75ea47b2d1c1601aecc355cf21eb6f80d043f512fcedec81a4018d2776a1 in /etc/supervisor.d/sshd.ini 41 B
fde06c761bde092a37890e94c8d68e16ef0ced5f1c70357a2cc3c4aab51cbe3d 8 hours ago /bin/sh -c set -x && /bin/sed -i 's/.*session.*required.*pam_loginuid.so.*/session optional pam_loginuid.so/g' /etc/pam.d/sshd && ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N '' && mkdir /var/run/sshd /etc/supervisor.d && /usr/bin/echo_supervisord_conf >/etc/supervisord.conf && sed -i 's/nodaemon=false/nodaemon=true/' /etc/supervisord.conf && echo -e '[include]\nfiles=/etc/supervisor.d/*.ini' >>/etc/supervisord.conf && grep ^[^\;] /etc/supervisord.conf && chmod 755 /root/start.sh && ./root/start.sh 12.99 kB
e97f94a79de0fa89a437ace2a2d14d3cfbba83f8d2f0528660e9028832735d6e 8 hours ago /bin/sh -c #(nop) ADD file:0cce39ed9dc5d31da4c1112794629d4bab2f82e18e7a5bcabdf6defeae4e0657 in /root/start.sh 807 B
420cb9e73c70c2e7d20af40d66cae68ed32362072a9aae53e1855c700dc79718 8 hours ago /bin/sh -c rpm -ivh http://dl.fedoraproject.org/pub/ ... ease-7-5.noarch.rpm && yum -y install openssh-server passwd python-pip && yum clean all && /usr/bin/pip install supervisor 23.25 MB
19b009f08542bcd1e8a5e17e4b1bd60e3e1cadbafcf4eaae914a3ba67784b73e 8 hours ago /bin/sh -c yum -y update; yum clean all 12.41 MB
751a85a0d00bcbc6fac2051f79a978c9091ed03b6fa451ab4bfff53d28c1f40d 8 hours ago /bin/sh -c #(nop) MAINTAINER pcnk 0 B
fd44297e2ddb050ec4fa9752b7a4e3a8439061991886e2091e7c1f007c906d75 2 weeks ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0 B
41459f052977938b824dd011e1f2bec2cb4d133dfc7e1aa0e90f7c5d337ca9c4 2 weeks ago /bin/sh -c #(nop) ADD file:be2a22bb15fbbbf24b5f13830d9ec31fad7e8bdf251906c79b05ad52cb4eef61 in / 215.7 MB
6941bfcbbfca7f4f48becd38f2639157042b5cf9ab8c080f1d8b6d047380ecfc 2 weeks ago /bin/sh -c #(nop) MAINTAINER The CentOS Project <cloud-ops@centos.org> 0 B
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