4. Docker

一、Docker容器管理

1. 查看启动的容器

bash-3.2# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
96d50d4ae5e4        centos              "/bin/bash"         22 hours ago        Up 19 hours                             desperate_hopper

2. 查看所有的容器(包括启动、停止)

bash-3.2# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                    PORTS               NAMES
4711aa1104b4        centos              "/bin/bash"         18 hours ago        Exited (0) 18 hours ago                       loving_fermi
96d50d4ae5e4        centos              "/bin/bash"         22 hours ago        Up 19 hours                                   desperate_hopper

3. 创建容器(create、run)、进入容器

### 用create创建容器.
bash-3.2# docker images
REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
new_centos             01                  c492c1644918        2 hours ago         279.3 MB
centos-6-x86_minimal   latest              4cc6c9327f19        2 hours ago         326.3 MB
90root                 90root              2a332da70fd1        2 weeks ago         196.7 MB
centos                 latest              2a332da70fd1        2 weeks ago         196.7 MB
bash-3.2# docker create -it centos-6-x86_minimal /bin/bash
9e3281c1e756ea7c67aa7ec404b16e3483b4e2be26b7f15548f116b5c86c0aaa
bash-3.2# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                    PORTS               NAMES
9e3281c1e756        centos              "/bin/bash"       25 seconds ago                                                    goofy_bohr
bash-3.2# docker exec -it 9e3281c1e756 /bin/bash      #进入容器
9e3281c1e756# exit
bash-3.2# docker attach 9e3281c1e756
9e3281c1e756# exit
docker ps
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS              PORTS               NAMES
b527af0824ae        centos-6-x86_minimal   "/bin/bash"         8 minutes ago       Up 8 minutes                            cocky_darwin
96d50d4ae5e4        centos                 "/bin/bash"         22 hours ago        Up 19 hours                             desperate_hopper
# exec和attach总结: attach登陆容器后,退出时容器会关闭. 推荐使用exec进入容器
### 用run创建容器
bash-3.2# docker run -it centos-6-x86_minimal /bin/bash
80b9fd653f14# cat /etc/redhat-release
CentOS release 6.7 (Final)
80b9fd653f14# uname -r
2.6.32-573.26.1.el6.x86_64

4. 启动停止容器

bash-3.2# docker ps
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS                     PORTS               NAMES
80b9fd653f14        centos-6-x86_minimal   "/bin/bash"         5 minutes ago       Exited (0) 2 minutes ago                       serene_darwin
bash-3.2# docker start 80b9fd653f14
bash-3.2# docker ps
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS              PORTS               NAMES
80b9fd653f14        centos-6-x86_minimal   "/bin/bash"         5 minutes ago       Up 1 seconds                            serene_darwin
bash-3.2# docker stop 80b9fd653f14
bash-3.2# docker ps -a
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS                       PORTS               NAMES
80b9fd653f14        centos-6-x86_minimal   "/bin/bash"         6 minutes ago       Exited (137) 6 seconds ago                       serene_darwin

5. 创建容器,指定容器名

bash-3.2# docker run -itd -h 90root --name 90root centos:latest bash
9c6686180ab82b21f3153251e81b4c5848c5e8162d03d57e8e08b630ff30f12c
bash-3.2# docker ps
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS              PORTS               NAMES
9c6686180ab8        centos:latest          "bash"              3 seconds ago       Up 2 seconds                            90root
### -d: 容器退出后不关闭容器.    -h:指定容器主机名.

6. 删除容器/镜像

### 删除容器
bash-3.2# docker ps -a
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS                        PORTS               NAMES
d2ef72ac1353        centos-6-x86_minimal   "/bin/bash"         46 minutes ago                                                        desperate_yonath
bash-3.2# docker rm d2ef72ac1353        #删除一个关闭的容器
bash-3.2# docker rm -f 96d50d4ae5e4     #删除一个启动的容器
### 删除镜像
bash-3.2# docker images
REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
registry               latest              07d93e41c370        4 months ago        234.9 MB
bash-3.2# docker rmi registry:latest        #删除一个镜像

7. 导出容器(可迁移到其它机器)/导入容器

###导出容器
bash-3.2#  docker ps
CONTAINER ID        IMAGE                  COMMAND             CREATED             STATUS              PORTS               NAMES
9c6686180ab8        centos:latest          "bash"              9 minutes ago       Up 9 minutes                            90root
bash-3.2# docker export 9c6686180ab8 > 90root_centos.tar
###导入容器(恢复的只是一个镜像,需要通过新镜像创建新的容器)
bash-3.2# docker rm -f 9c6686180ab8
bash-3.2# cat 90root_centos.tar | docker import - 90root_centos
345cf4e7d1a6a9747719d3bb873e6354417cc6322c06368b6c556b83b506c717
bash-3.2# docker images
REPOSITORY             TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
90root_centos          latest              345cf4e7d1a6        15 seconds ago      196.7 MB
bash-3.2# docker run -itd 90root_centos bash
4db99c957051af65a9fe19810752a10fe7da3e2462f67734149f4c416b58f725