docker镜像保存、导入和docker的操作（运行，停止，删除，进入和查看日志等操作）

#第一种方法

#导出
docker save -o centos.tar centos
#导入
docker load --input centos.tar

#第二种方法

######################################################################################

#-d后台启动，如果没有这个镜像，会自动帮你pull

#-t分配个伪终端，可以登录进去；-i 伪终端可以保持打开状态

[root@centos7-5-01 ~]# docker run --name mydocker -i -t centos /bin/bash

#-d启动容器，让他在后台运行，如果你本机没有nginx镜像，他会自动去获取nginx镜像

[root@centos7-5-01 ~]# docker run -d --name mynginx nginx

Unable to find image 'nginx:latest' locally

latest: Pulling from nginx

1cb018da208f: Pull complete

c1a0d2b79b3f: Pull complete

0aec54b378f5: Pull complete

b599d18a520b: Pull complete

a1cfc1b806a4: Pull complete

c2504687d157: Pull complete

a00416541f84: Pull complete

6adf11c406b6: Pull complete

9daddd1b8b0f: Pull complete

036477bc0d5a: Pull complete

Digest: sha256:248f3c1a01b35a098c85b31c356787068b1c1adbbd2f902fb2d6f49b95fd380f

Status: Downloaded newer image for nginx:latest

0c0c2a5e9f665e0a662177ce3d52a7907346ea66ab40a53d66e067511f7ca5a9

#查看运行的容器

[root@centos7-5-01 ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

0c0c2a5e9f66 nginx "nginx -g 'daemon of 7 seconds ago Up 7 seconds 80/tcp mynginx

481b2fa0cf72 centos "/bin/bash" 2 minutes ago Exited (0) 2 minutes ago mydocker2

0fd35d91742b centos "/bin/bash" 7 minutes ago Exited (127) 6 minutes ago mydocker

#删除运行的容器

[root@centos7-5-01 ~]# docker rm mydocker

mydocker

[root@centos7-5-01 ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

0c0c2a5e9f66 nginx "nginx -g 'daemon of About a minute ago Up About a minute 80/tcp mynginx

481b2fa0cf72 centos "/bin/bash" 3 minutes ago Exited (0) 3 minutes ago mydocker2

#停止运行的容器

[root@centos7-5-01 ~]# docker stop 0c0c2a5e9f66

0c0c2a5e9f66

[root@m68en-s000 game]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

0c0c2a5e9f66 nginx "nginx -g 'daemon of 2 minutes ago Exited (0) 29 seconds ago mynginx

481b2fa0cf72 centos "/bin/bash" 4 minutes ago Exited (0) 4 minutes ago mydocker2

######################进入运行中的容器#############################

#这个进去容器的命令不好用，有的时候进不去，只能Ctrl+C强制终止，这样容器的状态会自动退出了

[root@centos7-5-01 ~]# docker attach mynginx

######exec也可以进去，但有时会出现问题

docker exec -it mydocker /bin/bash

#最后容器的状态

[root@centos7-5-01 ~]# docker ps -l

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

cd15d1249f8f nginx "nginx -g 'daemon of 3 minutes ago Exited (0) About a minute ago mynginx

[root@centos7-5-01 ~]# docker ps -l

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

cd15d1249f8f nginx "nginx -g 'daemon of 3 minutes ago Exited (0) About a minute ago mynginx

#启动容器，推荐使用下面的命令进入容器

[root@centos7-5-01 ~]# docker start cd15d1249f8f

cd15d1249f8f

[root@centos7-5-01 ~]# docker ps -l

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

cd15d1249f8f nginx "nginx -g 'daemon of 5 minutes ago Up 1 seconds 80/tcp mynginx

#util-linux包有这个命令nsenter

#获取容器的pid，使用nsenter命令进入容器

[root@centos7-5-01 ~]# docker ps -l

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

cd15d1249f8f nginx "nginx -g 'daemon of 5 minutes ago Up 1 seconds 80/tcp mynginx

[root@centos7-5-01 ~]# docker inspect --format "{{.State.Pid}}" cd15d1249f8f

3451

[root@centos7-5-01 ~]# nsenter --target 3451 --mount --uts --ipc --net --pid

#脚本进入，脚本如下

#!/bin/bash

docker ps -l

read -p "请输入你要进去的容器：" CNAME

#CNAME=$1

CPID=$(docker inspect --format "{{.State.Pid}}" $CNAME)

nsenter --target "$CPID" --mount --uts --ipc --net --pid

###全部杀死容器

docker kill $(docker ps -a -q)

docker镜像保存、导入和docker的操作（运行，停止，删除，进入和查看日志等操作）

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