三、docker镜像管理
一、docker镜像管理
1.1、镜像搜索-search
从docker镜像仓库模糊搜索镜像
用法：
docker search 镜像关键字
[root@zutuanxue ~]# docker search centos
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
centos The official build of CentOS. 5674 [OK]
#字段说明：
NAME:镜像名称
DESCRIPTION:镜像描述
STARS：镜像星级，数字越大表示用的人越多
OFFICIAL:是否为官方 跟[OK]说明是官方
AUTOMATED: 是否为自动化构建的镜像1.2、镜像下载-pull命令
从docker指定的仓库下载镜像到本地
用法:
docker pull 镜像名称
[root@zutuanxue ~]# docker pull centos
Using default tag: latest
latest: Pulling from library/centos
729ec3a6ada3: Pull complete
Digest: sha256:f94c1d992c193b3dc09e297ffd54d8a4f1dc946c37cbeceb26d35ce1647f88d9
Status: Downloaded newer image for centos:latest
docker.io/library/centos:latest1.3、本地镜像查看-images命令
查看本地存储的镜像
[root@zutuanxue ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/gitlab/gitlab-ce latest 515ad1a75677 7 weeks ago 1.9 GB
docker.io/redis latest 1319b1eaa0b7 7 weeks ago 104 MB
#字段说明：
REPOSITORY:镜像的名字
TAG：镜像的标签
IMAGE ID：镜像的ID号
CREATED：镜像建立时间
SIZE: 镜像大小1.4、镜像详细信息-inspect命令
显示镜像的详细导入由save保存出来的压缩文件镜像
用法:
docker load -i 镜像压缩文件名称 [镜像名称或者ID]
[root@zutuanxue ~]# docker load -i centos_base.tar
Loaded image: centos:latest信息
用法:
docker inspect [镜像名称或者ID]
[root@zutuanxue ~]# docker inspect 0f3e07c0138f
[
{
"Id": "sha256:0f3e07c0138fbe05abcb7a9cc7d63d9bd4c980c3f61fea5efa32e7c4217ef4da",
"RepoTags": [
"centos:latest"
],
"RepoDigests": [
"centos@sha256:f94c1d992c193b3dc09e297ffd54d8a4f1dc946c37cbeceb26d35ce1647f88d9"
],
"Parent": "",
"Comment": "",
"Created": "2019-10-01T23:19:57.105928163Z",
"Container": "711572e3c0c1ac06d5c13c4e668ec170b8ad8786b5f0949f884a5f7fd350d856",
"ContainerConfig": {
"Hostname": "711572e3c0c1",
"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:c0bda62fdbad65a3c6a1843d293a3a47d8233115cc6d384e3cb07c53580a2b43",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20190927",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.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:c0bda62fdbad65a3c6a1843d293a3a47d8233115cc6d384e3cb07c53580a2b43",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20190927",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"Architecture": "amd64",
"Os": "linux",
"Size": 219583055,
"VirtualSize": 219583055,
"GraphDriver": {
"Data": {
"MergedDir": "/var/lib/docker/overlay2/e84fb0b30e3f1cd4a40d2ee6ed522736aedad13fcfce3571075ebbbd665aab4a/merged",
"UpperDir": "/var/lib/docker/overlay2/e84fb0b30e3f1cd4a40d2ee6ed522736aedad13fcfce3571075ebbbd665aab4a/diff",
"WorkDir": "/var/lib/docker/overlay2/e84fb0b30e3f1cd4a40d2ee6ed522736aedad13fcfce3571075ebbbd665aab4a/work"
},
"Name": "overlay2"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:9e607bb861a7d58bece26dd2c02874beedd6a097c1b6eca5255d5eb0d2236983"
]
},
"Metadata": {
"LastTagTime": "0001-01-01T00:00:00Z"
}
}
]1.5、本地镜像删除-rmi命令
删除本地镜像库中的某个镜像
用法:
docker rmi [镜像名称或者ID]
[root@zutuanxue ~]# docker rmi centos
Untagged: centos:latest
Untagged: centos@sha256:f94c1d992c193b3dc09e297ffd54d8a4f1dc946c37cbeceb26d35ce1647f88d9
Deleted: sha256:0f3e07c0138fbe05abcb7a9cc7d63d9bd4c980c3f61fea5efa32e7c4217ef4da
Deleted: sha256:9e607bb861a7d58bece26dd2c02874beedd6a097c1b6eca5255d5eb0d22369831.6、镜像保存-save命令
保存镜像为压缩文件
用法:
docker save -o 压缩文件名称 [镜像名称或者ID]
[root@zutuanxue ~]# docker save -o centos_base.tar centos
[root@zutuanxue ~]# ls
anaconda-ks.cfg centos_base.tar1.7、镜像载入-load命令
导入由save保存出来的压缩文件镜像
用法:
docker load -i 镜像压缩文件名称 [镜像名称或者ID]
[root@zutuanxue ~]# docker load -i centos_base.tar
Loaded image: centos:latest1.8、镜像管理命令-image命令
镜像管理命令，和上面的命令相似
[root@zutuanxue ~]# docker image --help
Usage: docker image COMMAND
Manage images
Commands:
build Build an image from a Dockerfile
history Show the history of an image
import Import the contents from a tarball to create a filesystem image
inspect Display detailed information on one or more images
load Load an image from a tar archive or STDIN
ls List images
prune Remove unused images
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rm Remove one or more images
save Save one or more images to a tar archive (streamed to STDOUT by default)
tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
