【Docker】-NO.131.Docker.1 -【Docker】

【Docker】-NO.131.Docker.1 -【Docker】
Style：Mac

Series：Java

Since：2018-09-10

End：2018-09-10

Total Hours：1

Degree Of Diffculty：5

Degree Of Mastery：5

Practical Level：5

Desired Goal：5

Archieve Goal：3

Gerneral Evaluation：3

Writer:kingdelee

Related Links：

http://www.cnblogs.com/kingdelee/

1.

centos6.8安装：

yum install -y epel-release

安装出现问题：

Error: docker-ce conflicts with 2:docker-1.13.1-75.git8633870.el7.centos.x86_64

yum remove -y docker-ce.x86_64 docker-ce-cli.x86_64 containerd.io.x86_64

根据文档描述的去做

https://yq.aliyun.com/articles/110806?spm=5176.8351553.0.0.2e381991PnZGy9

1. 安装／升级Docker客户端

推荐安装1.10.0以上版本的Docker客户端，参考文档 docker-ce
2. 配置镜像加速器

其他io版本的，是有/etc/sysconfig/docker，需要在里边修改镜像，最新版的，只需要按照下面的方式修改就行了，不需要管那个docker以及其他多余的修改

针对Docker客户端版本大于 1.10.0 的用户

您可以通过修改daemon配置文件/etc/docker/daemon.json来使用加速器
```
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://mm9zx6r4.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
```
https://docs.docker.com/install/linux/docker-ce/centos/#install-docker-ce

yum install -y yum-utils device-mapper-persistent-data lvm2
```
yum-config-manager --enable docker-ce-edge
```
启动docker

sudo systemctl start docker

通过服务启动docker
```
sudo systemctl restart docker
```
安装后，出现启动问题，可以重新删除后，再次安装

rm: cannot remove ‘/var/lib/docker/containers’: Device or resource busy

rm -rf /var/lib/docker

提示：

rm: cannot remove ‘/var/lib/docker/aufs’: Device or resource busy

原因：

在建立容器的时候做了相应目录的挂载，没有卸载，所以Device or resource busy

解决方法：

查找挂载的目录cat /proc/mounts | grep "docker"

卸载umount /var/lib/docker/aufs

rm -rf /var/lib/docke

如果无法删除，就重启再删

https://www.cnblogs.com/anliven/p/6218741.html

https://success.docker.com/article/using-systemd-to-control-the-docker-daemon

vim /etc/systemd/system/docker.service

ExecStart=/usr/bin/dockerd --config-file=/etc/docker/daemon.json -H unix://

重载配置

sudo systemctl daemon-reload

重启镜像

sudo systemctl restart docker

查看

ps -ef | grep docker

拉镜像：

docker run hello-world

docker命令

docker images 列出本地主机上的景象

各个选项说明:

REPOSITORY：表示镜像的仓库源

TAG：镜像的标签

IMAGE ID：镜像ID

CREATED：镜像创建时间

SIZE：镜像大小

同一仓库源可以有多个 TAG，代表这个仓库源的不同个版本，我们使用 REPOSITORY:TAG 来定义不同的镜像。

如果你不指定一个镜像的版本标签，例如你只使用 ubuntu，docker 将默认使用 ubuntu:latest 镜像

docker search 搜索某个镜像

docker pull mysql 下载mysql镜像

docker rmi mysql 删除某个镜像

docker rmi -f hello-world

docker rmi -f $(docker images -qa) 级联删除所有镜像
- docker run -it 镜像id，运行镜像
OPTIONS说明（常用）：有些是一个减号，有些是两个减号



--name="容器新名字": 为容器指定一个名称；

-d: 后台运行容器，并返回容器ID，也即启动守护式容器；

-i：以交互模式运行容器，通常与 -t 同时使用；

-t：为容器重新分配一个伪输入终端，通常与 -i 同时使用；

-P: 随机端口映射；

-p: 指定端口映射，有以下四种格式

      ip:hostPort:containerPort

      ip::containerPort

      hostPort:containerPort

      containerPort

指定容器名字

docker run --name centos -it 75835a67d134
- docker ps，列出正在运行的容器
- docker ps -a 列出正在运行+历史上运行过的容器
在容器内

exit，退出并停止容器

ctrl+p+g，退出但不终止容器，如果是iterm下，可以直接关闭标签即可
- docker attach 进入已经启动的容器
通过 docker ps -n 10，找到前10个创建的容器

尽管是用的同一个镜像，但是每个容器都是独立的，这些独立的容器，是通过刚刚docker run -it 创建的：

centos，admiring_kalam

可以通过docker的启动命令将其启动

修改容器名字，容器不能重名

docker 容器（服务）重命名只要一个命令就可以：
docker rename 原容器名新容器名

docker top 容器id，查看容器内正在运行的进程

docker inspect 6647e43f5912，查看容器内部细节
```
[
    {
        "Id": "6647e43f5912ce8945e29143f4059afaf3c50f1853a67ca6833bdc2a8da10202",
        "Created": "2018-10-27T04:07:38.596144727Z",
        "Path": "/bin/bash",
        "Args": [],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 9554,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2018-10-27T05:22:04.957537315Z",
            "FinishedAt": "2018-10-27T05:19:02.144550316Z"
        },
        "Image": "sha256:75835a67d1341bdc7f4cc4ed9fa1631a7d7b6998e9327272afea342d90c4ab6d",
        "ResolvConfPath": "/var/lib/docker/containers/6647e43f5912ce8945e29143f4059afaf3c50f1853a67ca6833bdc2a8da10202/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/6647e43f5912ce8945e29143f4059afaf3c50f1853a67ca6833bdc2a8da10202/hostname",
        "HostsPath": "/var/lib/docker/containers/6647e43f5912ce8945e29143f4059afaf3c50f1853a67ca6833bdc2a8da10202/hosts",
        "LogPath": "/var/lib/docker/containers/6647e43f5912ce8945e29143f4059afaf3c50f1853a67ca6833bdc2a8da10202/6647e43f5912ce8945e29143f4059afaf3c50f1853a67ca6833bdc2a8da10202-json.log",
        "Name": "/centos",
        "RestartCount": 0,
        "Driver": "devicemapper",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": null,
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "default",
            "PortBindings": {},
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "AutoRemove": false,
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "shareable",
            "Cgroup": "",
            "Links": null,
            "OomScoreAdj": 0,
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": null,
            "UTSMode": "",
            "UsernsMode": "",
            "ShmSize": 67108864,
            "Runtime": "runc",
            "ConsoleSize": [
                0,
                0
            ],
            "Isolation": "",
            "CpuShares": 0,
            "Memory": 0,
            "NanoCpus": 0,
            "CgroupParent": "",
            "BlkioWeight": 0,
            "BlkioWeightDevice": [],
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "DeviceCgroupRules": null,
            "DiskQuota": 0,
            "KernelMemory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,
            "OomKillDisable": false,
            "PidsLimit": 0,
            "Ulimits": null,
            "CpuCount": 0,
            "CpuPercent": 0,
            "IOMaximumIOps": 0,
            "IOMaximumBandwidth": 0,
            "MaskedPaths": [
                "/proc/acpi",
                "/proc/kcore",
                "/proc/keys",
                "/proc/latency_stats",
                "/proc/timer_list",
                "/proc/timer_stats",
                "/proc/sched_debug",
                "/proc/scsi",
                "/sys/firmware"
            ],
            "ReadonlyPaths": [
                "/proc/asound",
                "/proc/bus",
                "/proc/fs",
                "/proc/irq",
                "/proc/sys",
                "/proc/sysrq-trigger"
            ]
        },
        "GraphDriver": {
            "Data": {
                "DeviceId": "25",
                "DeviceName": "docker-253:0-34571929-ac887ffa3045a9e8c0146009778996bb55a34e2e730e2baa6ad71dd1cc1f666f",
                "DeviceSize": "10737418240"
            },
            "Name": "devicemapper"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "6647e43f5912",
            "Domainname": "",
            "User": "",
            "AttachStdin": true,
            "AttachStdout": true,
            "AttachStderr": true,
            "Tty": true,
            "OpenStdin": true,
            "StdinOnce": true,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "Cmd": [
                "/bin/bash"
            ],
            "ArgsEscaped": true,
            "Image": "75835a67d134",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "org.label-schema.build-date": "20181006",
                "org.label-schema.license": "GPLv2",
                "org.label-schema.name": "CentOS Base Image",
                "org.label-schema.schema-version": "1.0",
                "org.label-schema.vendor": "CentOS"
            }
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "d23327c79fd6c87969d0aa190f2e465f5be2fd6a0179a70d7e7c70ef0f13b71d",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/d23327c79fd6",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "03e81113086826176c03190b95513cf19860b3dee30f4b340831630a24ca6baf",
            "Gateway": "172.17.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.17.0.2",
            "IPPrefixLen": 16,
            "IPv6Gateway": "",
            "MacAddress": "02:42:ac:11:00:02",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "ca2d34924a01911c8bde199f3850427b3973b6fce3c00fc0ee47f79285c35c80",
                    "EndpointID": "03e81113086826176c03190b95513cf19860b3dee30f4b340831630a24ca6baf",
                    "Gateway": "172.17.0.1",
                    "IPAddress": "172.17.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:11:00:02",
                    "DriverOpts": null
                }
            }
        }
    }
]
```
　　
- docker run -d 镜像名，创建镜像，并在后台运行
- docker logs -tf --tail 10 6647e43f5912，查看logs日志，即history
- docker exec -it 容器id ls，不进入容器，直接交互
docker cp 6647e43f5912:t1/a.txt . ，docker cp 容器ID:容器内路径目的主机路径，将容器的文件拷贝到主机上

 

attach Attach to a running container # 当前 shell 下 attach 连接指定运行镜像

build Build an image from a Dockerfile # 通过 Dockerfile 定制镜像

commit Create a new image from a container changes # 提交当前容器为新的镜像

cp Copy files/folders from the containers filesystem to the host path #从容器中拷贝指定文件或者目录到宿主机中

create Create a new container # 创建一个新的容器，同 run，但不启动容器

diff Inspect changes on a container's filesystem # 查看 docker 容器变化

events Get real time events from the server # 从 docker 服务获取容器实时事件

exec Run a command in an existing container # 在已存在的容器上运行命令

export Stream the contents of a container as a tar archive # 导出容器的内容流作为一个 tar 归档文件[对应 import ]

history Show the history of an image # 展示一个镜像形成历史

images List images # 列出系统当前镜像

import Create a new filesystem image from the contents of a tarball # 从tar包中的内容创建一个新的文件系统映像[对应export]

info Display system-wide information # 显示系统相关信息

inspect Return low-level information on a container # 查看容器详细信息

kill Kill a running container # kill 指定 docker 容器

load Load an image from a tar archive # 从一个 tar 包中加载一个镜像[对应 save]

login Register or Login to the docker registry server # 注册或者登陆一个 docker 源服务器

logout Log out from a Docker registry server # 从当前 Docker registry 退出

logs Fetch the logs of a container # 输出当前容器日志信息

port Lookup the public-facing port which is NAT-ed to PRIVATE_PORT # 查看映射端口对应的容器内部源端口

pause Pause all processes within a container # 暂停容器

ps List containers # 列出容器列表

pull Pull an image or a repository from the docker registry server # 从docker镜像源服务器拉取指定镜像或者库镜像

push Push an image or a repository to the docker registry server # 推送指定镜像或者库镜像至docker源服务器

restart Restart a running container # 重启运行的容器

rm Remove one or more containers # 移除一个或者多个容器

rmi Remove one or more images # 移除一个或多个镜像[无容器使用该镜像才可删除，否则需删除相关容器才可继续或 -f 强制删除]

run Run a command in a new container # 创建一个新的容器并运行一个命令

save Save an image to a tar archive # 保存一个镜像为一个 tar 包[对应 load]

search Search for an image on the Docker Hub # 在 docker hub 中搜索镜像

start Start a stopped containers # 启动容器

stop Stop a running containers # 停止容器

tag Tag an image into a repository # 给源中镜像打标签

top Lookup the running processes of a container # 查看容器中运行的进程信息

unpause Unpause a paused container # 取消暂停容器

version Show the docker version information # 查看 docker 版本号

wait Block until a container stops, then print its exit code # 截取容器停止时的退出状态值



-------------------------------------------

attach    Attach to a running container                 # 当前 shell 下 attach 连接指定运行镜像

build     Build an image from a Dockerfile              # 通过 Dockerfile 定制镜像

commit    Create a new image from a container changes # 提交当前容器为新的镜像

cp        Copy files/folders from the containers filesystem to the host path #从容器中拷贝指定文件或者目录到宿主机中

create    Create a new container                        # 创建一个新的容器，同 run，但不启动容器

diff      Inspect changes on a container's filesystem # 查看 docker 容器变化

events    Get real time events from the server          # 从 docker 服务获取容器实时事件

exec      Run a command in an existing container        # 在已存在的容器上运行命令

export    Stream the contents of a container as a tar archive # 导出容器的内容流作为一个 tar 归档文件[对应 import ]

history Show the history of an image                  # 展示一个镜像形成历史

images    List images                                   # 列出系统当前镜像

import    Create a new filesystem image from the contents of a tarball # 从tar包中的内容创建一个新的文件系统映像[对应export]

info      Display system-wide information               # 显示系统相关信息

inspect Return low-level information on a container # 查看容器详细信息

kill      Kill a running container                      # kill 指定 docker 容器

load      Load an image from a tar archive              # 从一个 tar 包中加载一个镜像[对应 save]

login     Register or Login to the docker registry server    # 注册或者登陆一个 docker 源服务器

logout    Log out from a Docker registry server          # 从当前 Docker registry 退出

logs      Fetch the logs of a container                 # 输出当前容器日志信息

port      Lookup the public-facing port which is NAT-ed to PRIVATE_PORT    # 查看映射端口对应的容器内部源端口

pause     Pause all processes within a container        # 暂停容器

ps        List containers                               # 列出容器列表

pull      Pull an image or a repository from the docker registry server # 从docker镜像源服务器拉取指定镜像或者库镜像

push      Push an image or a repository to the docker registry server    # 推送指定镜像或者库镜像至docker源服务器

restart Restart a running container                   # 重启运行的容器

rm        Remove one or more containers                 # 移除一个或者多个容器

rmi       Remove one or more images             # 移除一个或多个镜像[无容器使用该镜像才可删除，否则需删除相关容器才可继续或 -f 强制删除]

run       Run a command in a new container              # 创建一个新的容器并运行一个命令

save      Save an image to a tar archive                # 保存一个镜像为一个 tar 包[对应 load]

search    Search for an image on the Docker Hub         # 在 docker hub 中搜索镜像

start     Start a stopped containers                    # 启动容器

stop      Stop a running containers                     # 停止容器

tag       Tag an image into a repository                # 给源中镜像打标签

top       Lookup the running processes of a container # 查看容器中运行的进程信息

unpause Unpause a paused container                    # 取消暂停容器

version Show the docker version information           # 查看 docker 版本号

wait      Block until a container stops, then print its exit code # 截取容器停止时的退出状态值



1.run和start的关系：

实践中需要注意的几个地方，创建并启动容器时候，通过docker run -it -p 主机端口:容器端口，这个端口一旦指定，容器就无法再去修改。

如果想换端口，就必须重新再run一遍。

每次run都会创建新的容器，所以，如果不需要修改端口的情况下，想再次开启容器，需要执行start而不是run。

如果是tomcat，在主机情况下，通过 localhost:主机端口可以访问到docker的容器端口

比如：指定 docker run -it -p 8088:8080 tomcat，那么就可以通过 localhost:8088访问tomcat，因为docker中tomcat的默认端口是8080

删除nginx相关的容器

docker rm -f $(docker ps -a | grep nginx | awk '{print $1}')

尝试改了ip

来源：https://www.cnblogs.com/zhangzeyu/p/6427249.html

进入后修改 nginx.conf

没有vim时要安装vim

vim /etc/nginx/nginx.conf

镜像操作实验---------------------------
```
[root@localhost vagrant]# docker exec -it 5475cb7c3fa1 /bin/bash

root@5475cb7c3fa1:/usr/local/tomcat/webapps# rm -rf docs/

[root@localhost vagrant]# docker commit -a "lee"  -m "remove a docs" 5475cb7c3fa1 tomcat:v1
sha256:bbfa74687c1f9161fcfbe14ee8247445f7ac1a52fc47df46065c625ea8797069

[root@localhost vagrant]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED              SIZE
tomcat              v1                  bbfa74687c1f        About a minute ago   463MB
tomcat              latest              05af71dd9251        10 days ago          463MB
nginx               latest              dbfc48660aeb        11 days ago          109MB
centos              latest              75835a67d134        2 weeks ago          200MB
[root@localhost vagrant]#
```
　　

nginx启动-------------------------------------------

参考：https://blog.csdn.net/kim_weir/article/details/80403805

里边docker映射nginx时，出现无法映射的情况

解决思路

1.自己创建映射的目录及文件，并拷贝conf

2.修改文件访问权限

3.修改文件所有者权限

docker run -p 80:80 --name nginx_80_80 -v $PWD/www:/www -v $PWD/conf/nginx.conf:/etc/nginx/nginx.conf -v $PWD/logs:/wwwlogs -d nginx

删除技巧：docker rm -f $(docker ps -a | grep nginx | awk '{print $1}')

设置共享目录------------------

本质上是创建数据卷进行共享通信

docker run -it -v /宿主机绝对路径目录:/容器内目录镜像名

docker run -it -v /home/vagrant/test/myfile:/myfile centos

查看容器卷，docker inspect 容器id

-----------------------

可在Dockerfile中使用VOLUME指令来给镜像添加一个或多个数据卷

VOLUME["/dataVolumeContainer","/dataVolumeContainer2","/dataVolumeContainer3"]

构建镜像

# volume test
FROM centos
VOLUME ["/dataVolumeContainer1","/dataVolumeContainer2"]
CMD echo "finished,--------success1"
CMD /bin/bash

docker build -f 镜像文件 -t 新的镜像名

docker build -f /home/vagrant/test/myfile/dockerfile -t centos_v1

通过docker inspect 容器id查看

构建继承关系-----------

以这个为镜像centos_v1为模板，构建容器centos_t1,centos_t2,centos_t3

docker run -it --name centos_t1 centos_v1 /bin/bash
exit
```
[root@localhost myfile]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS                NAMES
9be7c0facf42        centos_v1           "/bin/bash"              6 minutes ago       Exited (0) 25 seconds ago                        centos_t1
```
　　

启动

进入确认有这两个容器卷　

在卷1里边添加 centos_t1.txt

创建容器继承， centos_t2 继承 centos_t1 通过同一个镜像centos_v1

docker run -it --name centos_t2 --volumes-from centos_t1 centos_v1
```
[root@localhost myfile]# docker run -it --name centos_t2 --volumes from centos_t1 centos_v1
unknown flag: --volumes
See 'docker run --help'.
[root@localhost myfile]# docker run -it --name centos_t2 --volumes-from centos_t1 centos_v1
[root@612a7e2a951a /]# exit
exit
[root@localhost myfile]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS                NAMES
612a7e2a951a        centos_v1           "/bin/sh -c /bin/bash"   12 seconds ago      Exited (0) 2 seconds ago                         centos_t2
9be7c0facf42        centos_v1           "/bin/bash"              12 minutes ago      Exited (0) 6 minutes ago                         centos_t1
32943e151a0d        centos              "/bin/bash"              6 hours ago         Exited (0) 31 minutes ago                        modest_boyd
10ffd9d1d69d        nginx               "nginx -g 'daemon of…"   8 hours ago         Up 8 hours                  0.0.0.0:80->80/tcp   nginx_80_80
977213f8852b        tomcat:v1           "catalina.sh run"        22 hours ago        Exited (143) 11 hours ago                        tomcat_v1
d78bf34cd7c9        tomcat              "catalina.sh run"        30 hours ago        Exited (143) 13 hours ago                        tomcat8088
1a9337aa387e        centos              "/bin/bash"              34 hours ago        Exited (0) 34 hours ago                          awesome_benz
e2e9ba157f7b        centos              "/bin/bash"              34 hours ago        Exited (0) 34 hours ago                          relaxed_bardeen
6647e43f5912        75835a67d134        "/bin/bash"              37 hours ago        Exited (255) 31 hours ago                        centos
dc14127dd454        75835a67d134        "/bin/bash"              37 hours ago        Exited (137) 36 hours ago                        centos2
46db1d72bb6e        4ab4c602aa5e        "/hello"                 3 days ago          Exited (0) 3 days ago                            naughty_nash
[root@localhost myfile]# docker start 612a7e2a951a
612a7e2a951a
[root@localhost myfile]# docker attach 612a7e2a951a
[root@612a7e2a951a /]# cd /
.dockerenv            dataVolumeContainer1/ etc/                  lib64/                opt/                  run/                  sys/                  var/
anaconda-post.log     dataVolumeContainer2/ home/                 media/                proc/                 sbin/                 tmp/
bin/                  dev/                  lib/                  mnt/                  root/                 srv/                  usr/
[root@612a7e2a951a /]# cd /dataVolumeContainer1
[root@612a7e2a951a dataVolumeContainer1]# ls
centos_t1.txt
[root@612a7e2a951a dataVolumeContainer1]#
```
关于继承，容器间的信息传递，数据卷的生命周期是持续到没有容器使用它为止

------------------------------------

　　
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原文地址：https://www.cnblogs.com/kingdelee/p/9853516.html

【Docker】-NO.131.Docker.1 -【Docker】

1. 安装／升级Docker客户端

2. 配置镜像加速器

rm: cannot remove ‘/var/lib/docker/containers’: Device or resource busy