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docker - 迁移和备份

article 2024/11/20 19:24:50

文章目录

1、docker commit
- 1.1、查询容器 docker ps
- 1.2、docker commit zookeeper zookeeper:3.4.13
2、docker save -o
- 2.1、宿主机切换到 /opt 目录下
- 2.2、将镜像保存到宿主机/opt目录下
3、docker load -i

对某一个容器修改完毕以后，我们可以把最新的容器部署到其他的环境中。具体的流程操作如下所示：
在这里插入图片描述

涉及的docker命令：

docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]
docker commit 容器名称/容器的id 镜像名称			  # 把docker容器保存成一个镜像

docker save -o 镜像tar文件名称 镜像名称/镜像id		 # 把镜像保存为tar文件

docker load -i 镜像名称							  # 把tar文件恢复成为一个镜像

1、docker commit

[root@localhost ~]# docker commit --help

Usage:  docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

Create a new image from a container's changes

Aliases:
  docker container commit, docker commit

Options:
  -a, --author string    Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
  -c, --change list      Apply Dockerfile instruction to the created image
  -m, --message string   Commit message
  -p, --pause            Pause container during commit (default true)

1.1、查询容器 docker ps

[root@localhost ~]# docker ps
CONTAINER ID   IMAGE                    COMMAND                   CREATED          STATUS          PORTS                                                                   NAMES
903246a96cb1   portainer/portainer      "/portainer"              32 minutes ago   Up 32 minutes   8000/tcp, 9443/tcp, 0.0.0.0:10010->9000/tcp, :::10010->9000/tcp         portainer
8c71efe9dca7   wurstmeister/zookeeper   "/bin/sh -c '/usr/sb…"   4 weeks ago      Up 7 hours      22/tcp, 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, :::2181->2181/tcp   zookeeper
c14772057ab8   redis                    "docker-entrypoint.s…"   9 months ago     Up 7 hours      0.0.0.0:6379->6379/tcp, :::6379->6379/tcp                               spzx-redis
ab66508d9441   mysql:8                  "docker-entrypoint.s…"   9 months ago     Up 7 hours      0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp                    spzx-mysql

1.2、docker commit zookeeper zookeeper:3.4.13

在这里插入图片描述

[root@localhost ~]# docker commit zookeeper zookeeper:3.4.13
sha256:b95c1d54c7b222f8c57b43ed9aa00e04182cc2907e4c904ede25636afb4f6153

在这里插入图片描述

2、docker save -o

[root@localhost opt]# docker save --help

Usage:  docker save [OPTIONS] IMAGE [IMAGE...]

Save one or more images to a tar archive (streamed to STDOUT by default)

Aliases:
  docker image save, docker save

Options:
  -o, --output string   Write to a file, instead of STDOUT

2.1、宿主机切换到 /opt 目录下

[root@localhost ~]# cd /opt
[root@localhost opt]# ls
apache-tomcat-10.1.10         kibana                                                  mysql-community-devel-8.0.30-1.el7.x86_64.rpm            mysql-community-test-8.0.30-1.el7.x86_64.rpm
apache-tomcat-10.1.10.tar.gz  mongo                                                   mysql-community-embedded-compat-8.0.30-1.el7.x86_64.rpm  redis-7.0.10
containerd                    mysql-8.0.30-1.el7.x86_64.rpm-bundle.tar                mysql-community-icu-data-files-8.0.30-1.el7.x86_64.rpm   redis-7.0.10.tar.gz
elasticsearch                 mysql-community-client-8.0.30-1.el7.x86_64.rpm          mysql-community-libs-8.0.30-1.el7.x86_64.rpm             rh
jdk-17.0.7                    mysql-community-client-plugins-8.0.30-1.el7.x86_64.rpm  mysql-community-libs-compat-8.0.30-1.el7.x86_64.rpm      tool
jdk-17_linux-x64_bin.tar.gz   mysql-community-common-8.0.30-1.el7.x86_64.rpm          mysql-community-server-8.0.30-1.el7.x86_64.rpm
kafka                         mysql-community-debuginfo-8.0.30-1.el7.x86_64.rpm       mysql-community-server-debug-8.0.30-1.el7.x86_64.rpm
[root@localhost opt]#

2.2、将镜像保存到宿主机/opt目录下

[root@localhost opt]# docker save -o z3.tar zookeeper:3.4.13 
[root@localhost opt]#

[root@localhost opt]# ls
apache-tomcat-10.1.10         kibana                                                  mysql-community-devel-8.0.30-1.el7.x86_64.rpm            mysql-community-test-8.0.30-1.el7.x86_64.rpm
apache-tomcat-10.1.10.tar.gz  mongo                                                   mysql-community-embedded-compat-8.0.30-1.el7.x86_64.rpm  redis-7.0.10
containerd                    mysql-8.0.30-1.el7.x86_64.rpm-bundle.tar                mysql-community-icu-data-files-8.0.30-1.el7.x86_64.rpm   redis-7.0.10.tar.gz
elasticsearch                 mysql-community-client-8.0.30-1.el7.x86_64.rpm          mysql-community-libs-8.0.30-1.el7.x86_64.rpm             rh
jdk-17.0.7                    mysql-community-client-plugins-8.0.30-1.el7.x86_64.rpm  mysql-community-libs-compat-8.0.30-1.el7.x86_64.rpm      tool
jdk-17_linux-x64_bin.tar.gz   mysql-community-common-8.0.30-1.el7.x86_64.rpm          mysql-community-server-8.0.30-1.el7.x86_64.rpm           z3.tar
kafka                         mysql-community-debuginfo-8.0.30-1.el7.x86_64.rpm       mysql-community-server-debug-8.0.30-1.el7.x86_64.rpm

在这里插入图片描述
备份成功。

3、docker load -i

[root@localhost opt]# docker load --help

Usage:  docker load [OPTIONS]

Load an image from a tar archive or STDIN

Aliases:
  docker image load, docker load

Options:
  -i, --input string   Read from tar archive file, instead of STDIN
  -q, --quiet          Suppress the load output

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