1、Docker体系结构
Docker体系结构
2、获取镜像
[root@server ~]# docker search centos
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
centos The official build of CentOS. 5944 [OK]
ansible/centos7-ansible Ansible on Centos7 128 [OK]
jdeathe/centos-ssh OpenSSH / Supervisor / EPEL/IUS/SCL Repos - … 114 [OK]
consol/centos-xfce-vnc Centos container with "headless" VNC session… 114 [OK]
centos/mysql-57-centos7 MySQL 5.7 SQL database server 74
imagine10255/centos6-lnmp-php56 centos6-lnmp-php56 58 [OK]
tutum/centos Simple CentOS docker image with SSH access 45
centos/postgresql-96-centos7 PostgreSQL is an advanced Object-Relational … 43
kinogmt/centos-ssh CentOS with SSH 29 [OK]
pivotaldata/centos-gpdb-dev CentOS image for GPDB development. Tag names… 11
guyton/centos6 From official centos6 container with full up… 10 [OK]
centos/tools Docker image that has systems administration… 6 [OK]
drecom/centos-ruby centos ruby 6 [OK]
pivotaldata/centos Base centos, freshened up a little with a Do… 4
darksheer/centos Base Centos Image -- Updated hourly 3 [OK]
pivotaldata/centos-mingw Using the mingw toolchain to cross-compile t… 3
mamohr/centos-java Oracle Java 8 Docker image based on Centos 7 3 [OK]
pivotaldata/centos-gcc-toolchain CentOS with a toolchain, but unaffiliated wi… 3
miko2u/centos6 CentOS6 日本語環境 2 [OK]
mcnaughton/centos-base centos base image 1 [OK]
blacklabelops/centos CentOS Base Image! Built and Updates Daily! 1 [OK]
indigo/centos-maven Vanilla CentOS 7 with Oracle Java Developmen… 1 [OK]
pivotaldata/centos7-dev CentosOS 7 image for GPDB development 0
pivotaldata/centos6.8-dev CentosOS 6.8 image for GPDB development 0
smartentry/centos centos with smartentry 0 [OK]
[root@Server ~]# vi list_img_tags.sh
#!/bin/sh
repo_url=https://registry.hub.docker.com/v1/repositories
image_name=$1
curl -s ${repo_url}/${image_name}/tags | json_reformat | grep name | awk '{print $2}' | sed -e 's/"//g'
[root@Server ~]# sh list_img_tags.sh centos
latest
5
5.11
6
6.10
6.6
6.7
6.8
6.9
7
7.0.1406
7.1.1503
7.2.1511
7.3.1611
7.4.1708
7.5.1804
7.6.1810
7.7.1908
8
8.1.1911
centos5
centos5.11
centos6
centos6.10
centos6.6
centos6.7
centos6.8
centos6.9
centos7
centos7.0.1406
centos7.1.1503
centos7.2.1511
centos7.3.1611
centos7.4.1708
centos7.5.1804
centos7.6.1810
centos7.7.1908
centos8
centos8.1.1911
[root@Server ~]# docker pull centos
Using default tag: latest
latest: Pulling from library/centos
8a29a15cefae: Pull complete
Digest: sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700
Status: Downloaded newer image for centos:latest
docker.io/library/centos:latest
[root@server ~]# docker pull centos:7.7.1908
7.7.1908: Pulling from library/centos
f34b00c7da20: Pull complete
Digest: sha256:50752af5182c6cd5518e3e91d48f7ff0cba93d5d760a67ac140e2d63c4dd9efc
Status: Downloaded newer image for centos:7.7.1908
docker.io/library/centos:7.7.1908
[root@Server ~]# docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
123275d6e508: Pull complete
9a5d769f04f8: Pull complete
faad4f49180d: Pull complete
Digest: sha256:4a1f25606ce84be14bb5b4a4e11825d9ce78affeec62545d0a027dc8a1b2ce76
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
3、查看镜像基本信息
[root@Server ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 5a8dfb2ca731 15 hours ago 127MB
centos latest 470671670cac 3 months ago 237MB
centos 7.7.1908 08d05d1d5859 5 months ago 204MB
[root@Server ~]# docker image ls --no-trunc
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest sha256:5a8dfb2ca7312ee39433331b11d92f45bb19d7809f7c0ff19e1d01a2c131e959 15 hours ago 127MB
centos latest sha256:470671670cac686c7cf0081e0b37da2e9f4f768ddc5f6a26102ccd1c6954c1ee 3 months ago 237MB
centos 7.7.1908 sha256:08d05d1d5859ebcfb3312d246e2082e46cb307f0e896c9ac097185f0b0b19e56 5 months ago 204MB
标识镜像唯一性的方法：
a）REPOSITORY:TAG
比如：centos:latest、centos:8.1.1911
b）IMAGE ID（sha256：64位的号码，默认只截取12位）
比如：sha256:470671670cac686c7cf0081e0b37da2e9f4f768ddc5f6a26102ccd1c6954c1ee，截取后的IMAGE ID为470671670cac。
4、查看镜像详细信息
[root@Server ~]# docker image inspect centos:latest
[
{
"Id": "sha256:470671670cac686c7cf0081e0b37da2e9f4f768ddc5f6a26102ccd1c6954c1ee",
"RepoTags": [
"centos:latest"
],
"RepoDigests": [
"centos@sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700"
],
"Parent": "",
"Comment": "",
"Created": "2020-01-18T00:26:46.850750902Z",
"Container": "57333b28d93d47fedc0cc5c995092b9266fa4b73b64f3f88d42a08e46f1aab48",
"ContainerConfig": {
"Hostname": "57333b28d93d",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"/bin/bash\"]"
],
"ArgsEscaped": true,
"Image": "sha256:0fff7846fd29d8959680f5c1ed8ee2f30197a479c0f73a88dedc0f0755d3277d",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20200114",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS",
"org.opencontainers.image.created": "2020-01-14 00:00:00-08:00",
"org.opencontainers.image.licenses": "GPL-2.0-only",
"org.opencontainers.image.title": "CentOS Base Image",
"org.opencontainers.image.vendor": "CentOS"
}
},
"DockerVersion": "18.06.1-ce",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
"ArgsEscaped": true,
"Image": "sha256:0fff7846fd29d8959680f5c1ed8ee2f30197a479c0f73a88dedc0f0755d3277d",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20200114",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS",
"org.opencontainers.image.created": "2020-01-14 00:00:00-08:00",
"org.opencontainers.image.licenses": "GPL-2.0-only",
"org.opencontainers.image.title": "CentOS Base Image",
"org.opencontainers.image.vendor": "CentOS"
}
},
"Architecture": "amd64",
"Os": "linux",
"Size": 237117212,
"VirtualSize": 237117212,
"GraphDriver": {
"Data": {
"MergedDir": "/var/lib/docker/overlay2/7fdf0a9f17d326c175d105694d59a839c57a25f4f16647d2630596d2f0a442e5/merged",
"UpperDir": "/var/lib/docker/overlay2/7fdf0a9f17d326c175d105694d59a839c57a25f4f16647d2630596d2f0a442e5/diff",
"WorkDir": "/var/lib/docker/overlay2/7fdf0a9f17d326c175d105694d59a839c57a25f4f16647d2630596d2f0a442e5/work"
},
"Name": "overlay2"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:0683de2821778aa9546bf3d3e6944df779daba1582631b7ea3517bb36f9e4007"
]
},
"Metadata": {
"LastTagTime": "0001-01-01T00:00:00Z"
}
}
]
[root@Server ~]# docker image ls -q
5a8dfb2ca731
470671670cac
08d05d1d5859
5、镜像的导入和导出
[root@Server ~]# docker image save centos:7.7.1908 > /mnt/ubuntu7.7.19008.tar
[root@Server ~]# ls -l /mnt/ubuntu7.7.19008.tar
-rw-r--r-- 1 root root 211785728 Apr 17 09:05 /mnt/ubuntu7.7.19008.tar
[root@Server ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 5a8dfb2ca731 15 hours ago 127MB
centos latest 470671670cac 3 months ago 237MB
centos 7.7.1908 08d05d1d5859 5 months ago 204MB
[root@Server ~]# docker image rm centos:7.7.1908
Untagged: centos:7.7.1908
Untagged: centos@sha256:50752af5182c6cd5518e3e91d48f7ff0cba93d5d760a67ac140e2d63c4dd9efc
Deleted: sha256:08d05d1d5859ebcfb3312d246e2082e46cb307f0e896c9ac097185f0b0b19e56
Deleted: sha256:034f282942cd6c3abf9384601a57f080f8f75cc7f58527db8e07573d9d14ab46
[root@Server ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 5a8dfb2ca731 15 hours ago 127MB
centos latest 470671670cac 3 months ago 237MB
[root@Server ~]# docker image load -i /mnt/ubuntu7.7.19008.tar
034f282942cd: Loading layer 211.8MB/211.8MB
Loaded image: centos:7.7.1908
[root@Server ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 5a8dfb2ca731 15 hours ago 127MB
centos latest 470671670cac 3 months ago 237MB
centos 7.7.1908 08d05d1d5859 5 months ago 204MB
6、删除镜像
[root@Server ~]# docker image rm centos:7.7.1908
Untagged: centos:7.7.1908
Untagged: centos@sha256:50752af5182c6cd5518e3e91d48f7ff0cba93d5d760a67ac140e2d63c4dd9efc
Deleted: sha256:08d05d1d5859ebcfb3312d246e2082e46cb307f0e896c9ac097185f0b0b19e56
Deleted: sha256:034f282942cd6c3abf9384601a57f080f8f75cc7f58527db8e07573d9d14ab46
[root@Server ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 5a8dfb2ca731 15 hours ago 127MB
centos latest 470671670cac 3 months ago 237MB
[root@Server ~]# docker image rm -f `docker image ls -q`
Untagged: nginx:latest
Untagged: nginx@sha256:4a1f25606ce84be14bb5b4a4e11825d9ce78affeec62545d0a027dc8a1b2ce76
Deleted: sha256:5a8dfb2ca7312ee39433331b11d92f45bb19d7809f7c0ff19e1d01a2c131e959
Deleted: sha256:eede83f79a434879440e1f6f6f98a135b38057a35ddcdace715ae1bddcd7a884
Deleted: sha256:fa994cfd7aeedcd46b70cf30fea0ccf9f59f990bbb86bfa9b7c02d7ff2a833eb
Deleted: sha256:b60e5c3bcef2f42ec42648b3acf7baf6de1fa780ca16d9180f3b4a3f266fe7bc
Untagged: centos:latest
Untagged: centos@sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700
Deleted: sha256:470671670cac686c7cf0081e0b37da2e9f4f768ddc5f6a26102ccd1c6954c1ee
Deleted: sha256:0683de2821778aa9546bf3d3e6944df779daba1582631b7ea3517bb36f9e4007
Untagged: centos:7.7.1908
Deleted: sha256:08d05d1d5859ebcfb3312d246e2082e46cb307f0e896c9ac097185f0b0b19e56
Deleted: sha256:034f282942cd6c3abf9384601a57f080f8f75cc7f58527db8e07573d9d14ab46
[root@Server ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
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