05-docker 镜像导入导出

1.拉取镜像，默认是从官网docker拉取

[root@docker03 ~]# docker pull centos
Using default tag: latest
latest: Pulling from library/centos
5e35d10a3eba: Pull complete 
Digest: sha256:dcbc4e5e7052ea2306eed59563da1fec09196f2ecacbe042acbdcd2b44b05270
Status: Downloaded newer image for centos:latest

 2.查看本地镜像

[root@docker03 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
centos              latest              2d194b392dd1        2 weeks ago         195MB
hello-world         latest              f2a91732366c        3 months ago        1.85kB

 3.镜像导出及导入

# 导出容器镜像
[root@docker03 ~]# docker save centos > /opt/centos.tar.gz
[root@docker03 ~]# 

# 查看容器镜像
[root@docker03 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
centos              latest              2d194b392dd1        2 weeks ago         195MB
hello-world         latest              f2a91732366c        3 months ago        1.85kB

# 删除容器镜像
[root@docker03 ~]# docker rmi centos
Untagged: centos:latest
Untagged: centos@sha256:dcbc4e5e7052ea2306eed59563da1fec09196f2ecacbe042acbdcd2b44b05270
Deleted: sha256:2d194b392dd16955847a14f969b2dd319251471ffa6356be6d8f16c5bf53db9b
Deleted: sha256:b03095563b7956c62ae5a6d20e5959a950e3b1a96d4404c00b7da7393847494a

# 查看已经删除了centos容器镜像
[root@docker03 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
hello-world         latest              f2a91732366c        3 months ago        1.85kB

# 导入centos容器镜像(2种方式)
[root@docker03 ~]# docker load < /opt/centos.tar.gz 
[root@docker03 ~]# docker load --input /opt/centos.tar.gz
b03095563b79: Loading layer [==================================================>]    204MB/204MB
Loaded image: centos:latest

# centos容器镜像导入了
[root@docker03 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
centos              latest              2d194b392dd1        2 weeks ago         195MB
hello-world         latest              f2a91732366c        3 months ago        1.85kB