镜像的备份与恢复

备份镜像（导出镜像）

• docker save 镜像名称：镜像标签 -o 备份文件名（tar格式）

  [root@kube-node1 ~]# docker save docker.io/busybox:latest -o busybox.tar
  [root@kube-node1 ~]# ls
  anaconda-ks.cfg  ansible  busybox.tar  mydocker  newdicker
  [root@kube-node1 ~]#

恢复镜像（导入镜像）

• docker load -i 备份文件名称

  [root@kube-node1 ~]# docker images
  REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
  myos/httpd          latest              72b99379fd04        3 days ago          326 MB
  newcentos8          latest              24a296bc0a65        3 days ago          276 MB
  mycentos8           latest              6b81ea733ac4        3 days ago          276 MB
  docker.io/redis     latest              2e50d70ba706        11 days ago         117 MB
  docker.io/nginx     latest              55f4b40fe486        11 days ago         142 MB
  docker.io/centos    latest              5d0da3dc9764        9 months ago        231 MB
  [root@kube-node1 ~]# ls
  anaconda-ks.cfg  ansible  busybox.tar  mydocker  newdicker
  [root@kube-node1 ~]# docker load -i busybox.tar
  7ad00cd55506: Loading layer [==================================================>] 1.463 MB/1.463 MB
  Loaded image: docker.io/busybox:latest
  [root@kube-node1 ~]# docker images
  REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
  myos/httpd          latest              72b99379fd04        3 days ago          326 MB
  newcentos8          latest              24a296bc0a65        3 days ago          276 MB
  mycentos8           latest              6b81ea733ac4        3 days ago          276 MB
  docker.io/redis     latest              2e50d70ba706        11 days ago         117 MB
  docker.io/nginx     latest              55f4b40fe486        11 days ago         142 MB
  docker.io/busybox   latest              62aedd01bd85        3 weeks ago         1.24 MB
  docker.io/centos    latest              5d0da3dc9764        9 months ago        231 MB
  [root@kube-node1 ~]#