一、搜索镜像的两种方式

1.1网页搜索

https://hub.docker.com/search?q=&type=image

1.2 命令搜索

二、使用国内源加速

由于国外源下载慢，使用国内源加速。

curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://04be47cf.m.daocloud.io

其余方式参考：

https://www.cnblogs.com/happy4java/p/11206839.html

三、镜像管理命令

3.1 获取镜像

1.不指定TAG标签默认选择latest标签就会下载最新镜像，镜像内容会随着最新版本变更而变化，生产环境中需要指定标签。

[ ~]# docker pull ubuntu:18.04
18.04: Pulling from library/ubuntu
Image docker.io/library/ubuntu:18.04 uses outdated schema1 manifest format. Please upgrade to a schema2 image for better future compatibility. More information at https://docs.docker.com/registry/spec/deprecated-schema-v1/
5c939e3a4d10: Already exists
c63719cdbe7a: Already exists
19a861ea6baf: Already exists
651c9d2d6c4f: Already exists
Digest: sha256:f7addb415fe10cac22288733482875be44e65cc7b913de0a6c0ec0b5fde01ccd

2.从非官方仓库下载需要指定完整的仓库地址。

PS：知道有这命令就好，报错不重要，有什么问题憋着

[ ~]# docker pull hub.c.163.com/public/ubuntu:18.04
Error response from daemon: manifest for hub.c.163.com/public/ubuntu:18.04 not found: manifest unknown: manifest unknown

3.下完后，利用镜像创建容器，运行bash命令执行打印Hello World

[ ~]# docker run -it ubuntu:18.04 bash
WARNING: IPv4 forwarding is disabled. Networking will not work.
:/# echo "Hello World"
Hello World
:/# exit
exit

3.2 查看镜像信息

images命令

[ ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              18.04               ccc6e87d482b        9 days ago          64.2MB
mysql               latest              3a5e53f63281        10 days ago         465MB
hello-world         latest              fce289e99eb9        12 months ago       1.84kB
[ ~]# docker image ls
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              18.04               ccc6e87d482b        9 days ago          64.2MB
mysql               latest              3a5e53f63281        10 days ago         465MB
hello-world         latest              fce289e99eb9        12 months ago       1.84kB

images子命令

列出所有镜像文件，默认否

[ ~]# docker images --all=true
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              18.04               ccc6e87d482b        9 days ago          64.2MB
mysql               latest              3a5e53f63281        10 days ago         465MB
hello-world         latest              fce289e99eb9        12 months ago       1.84kB

列出镜像数字摘要值，默认否

[ ~]# docker images --digests=true
REPOSITORY          TAG                 DIGEST                                                                    IMAGE ID            CREATED             SIZE
ubuntu              18.04               sha256:8d31dad0c58f552e890d68bbfb735588b6b820a46e459672d96e585871acc110   ccc6e87d482b        9 days ago          64.2MB
ubuntu              18.04               sha256:f7addb415fe10cac22288733482875be44e65cc7b913de0a6c0ec0b5fde01ccd   ccc6e87d482b        9 days ago          64.2MB
mysql               latest              sha256:f1df505c4c6e8eae599a0482e3bde3e761cd700c00cbc371a8161648a26817c0   3a5e53f63281        10 days ago         465MB
hello-world         latest              sha256:9572f7cdcee8591948c2963463447a53466950b3fc15a247fcad1917ca215a2f   fce289e99eb9        12 months ago       1.84kB

过滤列出的镜像，如dangling=true只显示没有被使用的镜像

[ ~]# docker images --filter=dangling=true
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE

对输入结果中太长的部分是否进行截断，默认是

仅输出ID信息，默认否

[ ~]# docker images -q=true
ccc6e87d482b
3a5e53f63281
fce289e99eb9
[ ~]# docker images -q=false
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              18.04               ccc6e87d482b        9 days ago          64.2MB
mysql               latest              3a5e53f63281        10 days ago         465MB
hello-world         latest              fce289e99eb9        12 months ago       1.84kB