docker容器操作

docker容器创建

查看当前镜像信息

# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
cenots/centos7-mysql57   latest              d46f0eee5c07        4 hours ago         7.94GB
centos                   version7.1          babd2f913fc9        24 hours ago        262MB
centos                   version7            0f3e07c0138f        2 weeks ago         220MB

创建方式一：docker create

# docker create --name mysql-container --hostname mysql -it cenots/centos7-mysql57 /bin/bash
16986e9a0743c1f856a1ef3d02412793577777b4dde331fad9c611757fcb01d0

[root@sht-sgmhadoopnn-01 ~]# docker ps -a
CONTAINER ID        IMAGE                    COMMAND             CREATED             STATUS              PORTS               NAMES
16986e9a0743        cenots/centos7-mysql57   "/bin/bash"         23 seconds ago      Created                                 mysql-container

通过create命令创建的容器处于stop状态，启动该容器

# docker start mysql-container
mysql-container

# docker ps -a
CONTAINER ID        IMAGE                    COMMAND             CREATED              STATUS              PORTS               NAMES
16986e9a0743        cenots/centos7-mysql57   "/bin/bash"         About a minute ago   Up 3 seconds        3306/tcp            mysql-container

 创建方式二：docker run

# docker run --name mysql7-container --hostname mysql7 -it cenots/centos7-mysql57 /bin/bash

# docker ps
CONTAINER ID        IMAGE                    COMMAND             CREATED             STATUS              PORTS               NAMES
f73cf71d3e8e        cenots/centos7-mysql57   "/bin/bash"         11 seconds ago      Up 9 seconds        3306/tcp            mysql7-container
16986e9a0743        cenots/centos7-mysql57   "/bin/bash"         4 minutes ago       Up 2 minutes        3306/tcp            mysql-container

 通过run命令创建的容器处于running状态

 进入docker容器

# docker exec -it mysql-container /bin/bash
bash-4.4$ hostname
mysql

 容器的导出和导入

导出容器

# docker ps
CONTAINER ID        IMAGE                    COMMAND             CREATED             STATUS              PORTS               NAMES
f73cf71d3e8e        cenots/centos7-mysql57   "/bin/bash"         16 hours ago        Up 16 hours         3306/tcp            mysql7-container
16986e9a0743        cenots/centos7-mysql57   "/bin/bash"         16 hours ago        Up 16 hours         3306/tcp            mysql-container

# docker export --output mysql7-container.tar mysql7-container

# ls -lh
total 4.6G
-rw-------  1 root root 4.3G Oct 20 15:29 mysql7-container.tar

 导入容器

注意：导入容器实际上是导入到镜像，并不是根据导出的tar包产生一个新的容器

# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
cenots/centos7-mysql57   latest              d46f0eee5c07        21 hours ago        7.94GB
centos                   version7.1          babd2f913fc9        40 hours ago        262MB
centos                   version7            0f3e07c0138f        2 weeks ago         220MB

# docker import mysql7-container.tar centos/mysql:version7
sha256:b7138378001a6331fc7df1fe07fde0ba42b3a363d3be351a383b04f13082ddbc


# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
centos/mysql             version7            b7138378001a        49 seconds ago      4.57GB
cenots/centos7-mysql57   latest              d46f0eee5c07        21 hours ago        7.94GB
centos                   version7.1          babd2f913fc9        41 hours ago        262MB
centos                   version7            0f3e07c0138f        2 weeks ago         220MB