docker可以说是目前非常流行的容器技术,很多应用及环境搭建在docker上可以完美支持运行,并且环境打包非常方便,今天给大家整理了20个docker常用命令。

安装完成docker容器服务之后,需要了解如何操作它?在shell命令行下直接输入docker就可以查看帮助信息,如下。
[root@server ~]# docker
Usage: docker [OPTIONS] COMMAND [arg...]

A self-sufficient runtime for linux containers.

Options:

  --api-cors-header=                   Set CORS headers in the remote API
  -b, --bridge=                        Attach containers to a network bridge
  --bip=                               Specify network bridge IP
  -D, --debug=false                    Enable debug mode
  -d, --daemon=false                   Enable daemon mode
  --default-gateway=                   Container default gateway IPv4 address
  --default-gateway-v6=                Container default gateway IPv6 address
  --default-ulimit=[]                  Set default ulimits for containers
  --dns=[]                             DNS server to use
  --dns-search=[]                      DNS search domains to use
  -e, --exec-driver=native             Exec driver to use
  --exec-opt=[]                        Set exec driver options
  --exec-root=/var/run/docker          Root of the Docker execdriver
  --fixed-cidr=                        IPv4 subnet for fixed IPs
  --fixed-cidr-v6=                     IPv6 subnet for fixed IPs
  -G, --group=docker                   Group for the unix socket
  -g, --graph=/var/lib/docker          Root of the Docker runtime
  -H, --host=[]                        Daemon socket(s) to connect to
  -h, --help=false                     Print usage
  --icc=true                           Enable inter-container communication
  --insecure-registry=[]               Enable insecure registry communication
  --ip=0.0.0.0                         Default IP when binding container ports
  --ip-forward=true                    Enable net.ipv4.ip_forward
  --ip-masq=true                       Enable IP masquerading
  --iptables=true                      Enable addition of iptables rules
  --ipv6=false                         Enable IPv6 networking
  -l, --log-level=info                 Set the logging level
  --label=[]                           Set key=value labels to the daemon
  --log-driver=json-file               Default driver for container logs
  --log-opt=map[]                      Set log driver options
  --mtu=0                              Set the containers network MTU
  -p, --pidfile=/var/run/docker.pid    Path to use for daemon PID file
  --registry-mirror=[]                 Preferred Docker registry mirror
  -s, --storage-driver=                Storage driver to use
  --selinux-enabled=false              Enable selinux support
  --storage-opt=[]                     Set storage driver options
  --tls=false                          Use TLS; implied by --tlsverify
  --tlscacert=~/.docker/ca.pem         Trust certs signed only by this CA
  --tlscert=~/.docker/cert.pem         Path to TLS certificate file
  --tlskey=~/.docker/key.pem           Path to TLS key file
  --tlsverify=false                    Use TLS and verify the remote
  --userland-proxy=true                Use userland proxy for loopback traffic
  -v, --version=false                  Print version information and quit

Commands:
    attach    Attach to a running container
    build     Build an image from a Dockerfile
    commit    Create a new image from a container's changes
    cp        Copy files/folders from a container's filesystem to the host path
    create    Create a new container
    diff      Inspect changes on a container's filesystem
    events    Get real time events from the server
    exec      Run a command in a running container
    export    Stream the contents of a container as a tar archive
    history   Show the history of an image
    images    List images
    import    Create a new filesystem image from the contents of a tarball
    info      Display system-wide information
    inspect   Return low-level information on a container or image
    kill      Kill a running container
    load      Load an image from a tar archive
    login     Register or log in to a Docker registry server
    logout    Log out from a Docker registry server
    logs      Fetch the logs of a container
    pause     Pause all processes within a container
    port      Lookup the public-facing port that is NAT-ed to PRIVATE_PORT
    ps        List containers
    pull      Pull an image or a repository from a Docker registry server
    push      Push an image or a repository to a Docker registry server
    rename    Rename an existing container
    restart   Restart a running container
    rm        Remove one or more containers
    rmi       Remove one or more images
    run       Run a command in a new container
    save      Save an image to a tar archive
    search    Search for an image on the Docker Hub
    start     Start a stopped container
    stats     Display a stream of a containers' resource usage statistics
    stop      Stop a running container
    tag       Tag an image into a repository
    top       Lookup the running processes of a container
    unpause   Unpause a paused container
    version   Show the Docker version information
    wait      Block until a container stops, then print its exit code

Run 'docker COMMAND --help' for more information on a command.

1、docker start/stop/restart/kill

启动/停止/重启/杀掉容器

实例操作如下:
[root@docker ~]# docker start myweb
[root@docker ~]# docker stop myweb
[root@docker ~]# docker restart myweb
[root@docker ~]# docker kill -s kill myweb

参数 -s  #向容器发送信号

这些命令不做过多解释

2、docker run

创建并启动一个新的容器

常用参数如下:
-d             #后台运行容器,并返回容器ID
-i              #以交互式模式运行容器,常与-t参数同时使用
-t              #给容器重新分配一个伪终端,常与-i参数同时使用
--name     #给容器指定一个名称
-m            #指定容器使用内存的最大值
--net        #指定容器使用的网络类型
--link        #链接到另一个容器</blockquote>
实例操作如下:
[root@docker ~]# docker run -d --name nginx nginx:latest
#后台启动并运行一个名为nginx的容器,运行前它会自动去docker镜像站点下载最新的镜像文件
[root@docker ~]# docker run -d -P 80:80 nginx:latest
#后台启动并运名为nginx的容器,然后将容器的80端口映射到物理机的80端口
[root@docker ~]# docker run -d -v /docker/data:/docker/data -P 80:80 nginx:latest
#后台启动并运名为nginx的容器,然后将容器的80端口映射到物理机的80端口,并且将物理机的/docker/data目录映射到容器的/docker/data
[root@docker ~]# docker run -it  nginx:latest /bin/bash
#以交互式模式运行容器,然后在容器内执行/bin/bash命令

3、docker rm

删除容器

常用参数如下:
-f     #强制删除一个运行中的容器
-l     #删除指定的链接
-v     #删除与容器关联和卷</blockquote>
实例操作如下:
[root@docker ~]# docker rm -f mydocker
#强制删除容器mydocker
[root@docker ~]# docker rm -f dockerA dockerB
#强制删除容器dockerA,dockerB
[root@docker ~]# docker rm -v mydocker
#删除容器,并删除容器挂载的数据卷

4、docker create

创建一个新的容器但不启动它

[root@docker ~]# docker create --name myserver nginx:latest
09b3464c2f75b7b69f83d56a9cfc23ceb50a48a9db7652ee4c27e3e2cb1961f
#创建一个名为myserver的容器

5、docker exec

在运行的容器中执行命令

常用参数如下:
-d      #在后台运行
-i      #保持STDIN打开
-t      #分配一个伪终端
实例操作如下:
[root@docker ~]# docker exec -it mydocker /bin/sh /server/scripts/docker.sh
hello world!!!!!!!!!!
#以交互模式执行容器中的/server/scripts/docker.sh脚本
[root@docker ~]# docker exec -it mydocker /bin/sh
[root@10b9eddbefca /]#
#以交互模式给容器分配一个伪终端连接

6、docker ps

列出容器(正在运行)

常用参数如下:
-a      #列出所有容器包括停止的
-f      #根据条件过滤显示内容
-l      #列出最近创建的容器
-n      #列出最近创建的N个容器,N为数字
-q      #只显示容器ID
-s      #显示总文件大小
实例操作如下:
[root@docker ~]# docker ps
CONTAINER ID  IMAGE            COMMAND                  CREATED       STATUS       PORTS                                            NAMES
bd96d72ed9c7  google/cadvisor  "/usr/bin/cadvisor..."   47 hours ago  Up 47 hours  0.0.0.0:8082->8080/tcp                           cadvisor
665563143eb7  grafana/grafana  "/run.sh"                2 days ago    Up 2 days    0.0.0.0:3000->3000/tcp                           grafana
f2304dad5855  tutum/influxdb   "/run.sh"                2 days ago    Up 2 days    0.0.0.0:8083->8083/tcp, 0.0.0.0:8086->8086/tcp   influxdb
#列出正在运行的容器
[root@docker ~]# docker ps -n 2
CONTAINER ID   IMAGE               COMMAND                  CREATED       STATUS       PORTS                    NAMES
bd96d72ed9c7   google/cadvisor     "/usr/bin/cadvisor..."   47 hours ago  Up 47 hours  0.0.0.0:8082->8080/tcp   cadvisor
665563143eb7   grafana/grafana     "/run.sh"                2 days ago    Up 2 days    0.0.0.0:3000->3000/tcp   grafana
#列出最近创建的2个容器
[root@docker ~]# docker ps -a -q
bd96d72ed9c7
665563143eb7
f2304dad5855
9921d2660307
#显示所有容器的ID

7、docker inspect

获取容器的元数据

常用参数如下:
-f        #指定返回值格式或模板文件
-s        #显示总文件大小
--type    #为指定类型返回JSON
实例操作如下:
[root@docker ~]# docker inspect bd96d72ed9c7
[
    {
        "Id": "bd96d72ed9c713591ba8db0ed4c0ae2689188255da71033c7bced6bb34aa8542",
        "Created": "2018-05-23T09:22:10.633809699Z",
        "Path": "/usr/bin/cadvisor",
        "Args": [
            "-logtostderr",
            "-storage_driver=influxdb",
            "-storage_driver_db=cadvisor",
            "-storage_driver_host=192.168.3.82:8086"
        ],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 17589,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2018-05-23T09:22:10.769771142Z",
            "FinishedAt": "0001-01-01T00:00:00Z"
        },
        "Image": "sha256:75f88e3ec333cbb410297e4f40297ac615e076b4a50aeeae49f287093ff01ab1",
        "ResolvConfPath": "/var/lib/docker/containers/bd96d72ed9c713591ba8db0ed4c0ae2689188255da71033c7bced6bb34aa8542/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/bd96d72ed9c713591ba8db0ed4c0ae2689188255da71033c7bced6bb34aa8542/hostname",
        "HostsPath": "/var/lib/docker/containers/bd96d72ed9c713591ba8db0ed4c0ae2689188255da71033c7bced6bb34aa8542/hosts",
        "LogPath": "",
        "Name": "/cadvisor",
        "RestartCount": 0,
        "Driver": "overlay2",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": [
                "/:/rootfs,ro",
                "/var/run:/var/run",
-------------------------------------------省略部分内容
#获取容器ID为bd96d72ed9c7的元数据信息
[root@docker ~]# docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' cadvisor
172.17.0.3
[root@docker ~]# docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' influxdb
172.17.0.2
#获取容器名为influxdb\cadvisor的IP地址

8、docker logs

获取容器的日志

常用参数如下:
-f        #跟踪日志输出
-t        #显示时间戳
--tail    #只显示最新n条容器日志
--since   #显示某个开始时间的所有日志
实例操作如下:
[root@docker ~]# docker logs -f cadvisor
I0523 09:22:10.794233       1 storagedriver.go:48] Using backend storage type "influxdb"
I0523 09:22:10.794295       1 storagedriver.go:50] Caching stats in memory for 2m0s
I0523 09:22:10.794551       1 manager.go:151] cAdvisor running in container: "/sys/fs/cgroup/cpuacct,cpu"
I0523 09:22:10.810585       1 fs.go:139] Filesystem UUIDs: map[]
I0523 09:22:10.810599       1 fs.go:140] Filesystem partitions: map[shm:{mountpoint:/dev/shm major:0 minor:47 fsType:tmpfs blockSize:0} overlay:{mountpoint:/ major:0 minor:46 fsType:overlay blockSize:0} tmpfs:{mountpoint:/dev major:0 minor:50 fsType:tmpfs blockSize:0} /dev/mapper/centos-root:{mountpoint:/rootfs,ro major:253 minor:0 fsType:xfs blockSize:0} /dev/sda1:{mountpoint:/rootfs,ro/boot major:8 minor:1 fsType:xfs blockSize:0} /dev/mapper/centos-home:{mountpoint:/rootfs,ro/home major:253 minor:2 fsType:xfs blockSize:0}]
W0523 09:22:10.812419       1 info.go:52] Couldn't collect info from any of the files in "/etc/machine-id,/var/lib/dbus/machine-id"
I0523 09:22:10.812460       1 manager.go:225] Machine: {NumCores:1 CpuFrequency:2799091 MemoryCapacity:8203235328 HugePages:[{PageSize:2048 NumPages:0}] MachineID: SystemUUID:564D5235-FED8-3630-AA2B-D65F0855D036 BootID:fd7b3fb5-e74f-4280-80cf-0a7096239619 Filesystems:[{Device:tmpfs DeviceMajor:0 DeviceMinor:50 Capacity:4101615616 Type:vfs Inodes:1001371 HasInodes:true} {Device:/dev/mapper/centos-root DeviceMajor:253 DeviceMinor:0 Capacity:140633964544 Type:vfs Inodes:68681728 HasInodes:true} {Device:/dev/sda1 DeviceMajor:8 DeviceMinor:1 Capacity:1063256064 Type:vfs Inodes:524288 HasInodes:true} {Device:/dev/mapper/centos-home DeviceMajor:253 DeviceMinor:2 Capacity:21464350720 Type:vfs Inodes:10485760 HasInodes:true} {Device:shm DeviceMajor:0 DeviceMinor:47 Capacity:67108864 Type:vfs Inodes:1001371 HasInodes:true} {Device:overlay DeviceMajor:0 DeviceMinor:46 Capacity:140633964544 Type:vfs Inodes:68681728 HasInodes:true}] DiskMap:map[253:0:{Name:dm-0 Major:253 Minor:0 Size:140660178944 Scheduler:none} 253:1:{Name:dm-1 Major:253 Minor:1 Size:8455716864 Scheduler:none} 253:2:{Name:dm-2 Major:253 Minor:2 Size:21474836480 Scheduler:none} 2:0:{Name:fd0 Major:2 Minor:0 Size:4096 Scheduler:deadline} 8:0:{Name:sda Major:8 Minor:0 Size:171798691840 Scheduler:deadline}] NetworkDevices:[{Name:eth0 MacAddress:02:42:ac:11:00:03 Speed:10000 Mtu:1500}] Topology:[{Id:0 Memory:8589467648 Cores:[{Id:0 Threads:[0] Caches:[{Size:32768 Type:Data Level:1} {Size:32768 Type:Instruction Level:1} {Size:262144 Type:Unified Level:2}]}] Caches:[{Size:26214400 Type:Unified Level:3}]}] CloudProvider:Unknown InstanceType:Unknown InstanceID:None}
#跟踪查看容器cadvisor的日志

9、docker port

显示指定容器的端口映射

实例操作如下:
[root@docker ~]# docker port cadvisor
8080/tcp -> 0.0.0.0:8082
#显示cadvisor容器的端口映射信息

10、docker commit

用已存在的容器重新创建一个新的镜像

常用参数如下:
-a      #提交的镜像作者
-c      #使用Dockerfile指令来创建镜像
-m      #提交时附上说明文字
-p      #在commit时,将容器暂停
实例操作如下:
[root@docker ~]# docker commit -a "mingongge" -m "add a new images" bd96d72ed9c7  newdocker_images:v1.0.0
sha256:20ee805752cb7cae660fbae89d7c6ea4a9c6372f16a6cb079ecf6c79f87ed8c9
[root@docker ~]# docker images
REPOSITORY          TAG       IMAGE ID       CREATED        SIZE
newdocker_images    v1.0.0    20ee805752cb   7 seconds ago  62.2 MB
#将容器bd96d72ed9c7重新生成一个新的镜像名为newdocker_images

11、docker cp

用于容器与物理主机之间拷贝文件

实例操作如下:
[root@docker ~]# docker cp /data/index.html bd96d72ed9c7:/web/
#将物理主机中的/data/index.html拷贝到容器bd96d72ed9c7:/web/目录下
[root@docker ~]# docker cp /data/index.html bd96d72ed9c7:/web/index.php
#将物理主机中的/data/index.html拷贝到容器bd96d72ed9c7:/web/目录下并改名为index.php
[root@docker ~]# docker cp  bd96d72ed9c7:/web  /data/
#拷贝容器bd96d72ed9c7:/web/目录到物理主机中的/data/目录下

12、docker login/logout

用于登录与登出容器镜像仓库
docker login       #登陆到一个Docker镜像仓库,如果未指定镜像仓库地址,默认为官方仓库 Docker Hub
docker logout      #登出一个Docker镜像仓库,如果未指定镜像仓库地址,默认为官方仓库 Docker Hub

常用参数如下:
-u      #登陆的用户名
-p      #登陆的密码
实例操作如下:
[root@docker ~]# docker login -u username -p password
Login Succeeded
[root@docker ~]# docker logout
Removing login credentials for https://index.docker.io/v1/
#登录与登出默认的容器镜像仓库

13、docker pull/push

docker pull    #从镜像仓库中拉取或者更新指定镜像
docker push    #将本地的镜像上传到镜像仓库,要先登陆到镜像仓库

实例操作如下:
[root@docker ~]# docker  pull  nginx
Using default tag: latest
Trying to pull repository docker.io/library/nginx ... 
latest: Pulling from docker.io/library/nginx
f2aa67a397c4: Already exists 
3c091c23e29d: Pulling fs layer 
4a99993b8636: Pulling fs layer
#从镜像仓库中拉取或者更新指定镜像,输出信息如上
[root@docker ~]# docker push newdocker_images:v1.0.0
#上传镜像到镜像仓库上

14、docker images

显示系统本地容器镜像文件

常用参数如下:
-a                #列出所有的镜像(含中间映像层,默认,过滤掉中间映像层);
--digests      #显示镜像的摘要信息;
-f                  #显示满足条件的镜像;
--format       #指定返回值的模板文件;
--no-trunc     #显示完整的镜像信息;
-q                 #只显示镜像ID。
实例操作如下:
[root@docker ~]# docker images
REPOSITORY                                 TAG       IMAGE ID       CREATED         SIZE
newdocker_images                           v1.0.0    20ee805752cb   28 minutes ago  62.2 MB
docker.io/grafana/grafana                  latest    4700307f41f2   9 days ago      238 MB
registry.jumpserver.org/public/guacamole   1.0.0     6300349f2642   2 months ago    1.23 GB
docker.io/google/cadvisor                  latest    75f88e3ec333   5 months ago    62.2 MB
docker.io/tutum/influxdb                   latest    c061e5808198   19 months ago   290 MB
#列出本地所有的镜像
[root@docker ~]# docker images -q
20ee805752cb
4700307f41f2
6300349f2642
75f88e3ec333
c061e5808198
#只显示容器ID
[root@docker ~]# docker images --digests
REPOSITORY                                 TAG      DIGEST                                                                    IMAGE ID        CREATED         SIZE
newdocker_images                           v1.0.0   <none>                                                                    20ee805752cb    32 minutes ago  62.2 MB
docker.io/grafana/grafana                  latest   sha256:364bec4a39ecbec744ea4270aae35f6554eb6f2047b3ee08f7b5f1134857c32c   4700307f41f2    9 days ago      238 MB
registry.jumpserver.org/public/guacamole   1.0.0    sha256:ea862bb2e83b648701655c27900bca14b0ab7ab9d4572e716c25a816dc55307b   6300349f2642    2 months ago    1.23 GB
docker.io/google/cadvisor                  latest   sha256:9e347affc725efd3bfe95aa69362cf833aa810f84e6cb9eed1cb65c35216632a   75f88e3ec333    5 months ago    62.2 MB
docker.io/tutum/influxdb                   latest   sha256:5b7c5e318303ad059f3d1a73d084c12cb39ae4f35f7391b79b0ff2c0ba45304b   c061e5808198    19 months ago   290 MB
[root@docker ~]# docker images --no-trunc
REPOSITORY                                 TAG      IMAGE ID                                                                  CREATED         SIZE
newdocker_images                           v1.0.0   sha256:20ee805752cb7cae660fbae89d7c6ea4a9c6372f16a6cb079ecf6c79f87ed8c9   32 minutes ago  62.2 MB
docker.io/grafana/grafana                  latest   sha256:4700307f41f249630f6d772638ad8d32c7d7e3ec86c324d449d5e21076991bb7   9 days ago      238 MB
registry.jumpserver.org/public/guacamole   1.0.0    sha256:6300349f264218e783cd2bd6f7863d356ac8d5ac05a62584cb4680af7ebec292   2 months ago    1.23 GB
docker.io/google/cadvisor                  latest   sha256:75f88e3ec333cbb410297e4f40297ac615e076b4a50aeeae49f287093ff01ab1   5 months ago    62.2 MB
docker.io/tutum/influxdb                   latest   sha256:c061e580819875fad91910841fd3fc53893524bbb9326a68b2470861633aebb1   19 months ago   290 MB
#可以对比下两个参数显示的不同信息

15、docker rmi

删除镜像

常用参数如下:
-f      #强制删除
实例操作如下:
[root@docker ~]# docker images
REPOSITORY                                 TAG       IMAGE ID       CREATED         SIZE
newdocker_images                           v1.1.0    858cbd9ba687   6 seconds ago   62.2 MB
newdocker_images                           v1.0.0    20ee805752cb   36 minutes ago  62.2 MB
docker.io/grafana/grafana                  latest    4700307f41f2   9 days ago      238 MB
registry.jumpserver.org/public/guacamole   1.0.0     6300349f2642   2 months ago    1.23 GB
docker.io/google/cadvisor                  latest    75f88e3ec333   5 months ago    62.2 MB
docker.io/tutum/influxdb                   latest    c061e5808198   19 months ago   290 MB
[root@docker ~]# docker rmi 20ee805752cb
Untagged: newdocker_images:v1.0.0
Deleted: sha256:20ee805752cb7cae660fbae89d7c6ea4a9c6372f16a6cb079ecf6c79f87ed8c9
[root@docker ~]# docker images
REPOSITORY                                 TAG       IMAGE ID      CREATED          SIZE
newdocker_images                           v1.1.0    858cbd9ba687  39 seconds ago   62.2 MB
docker.io/grafana/grafana                  latest    4700307f41f2  9 days ago       238 MB
registry.jumpserver.org/public/guacamole   1.0.0     6300349f2642  2 months ago     1.23 GB
docker.io/google/cadvisor                  latest    75f88e3ec333  5 months ago     62.2 MB
docker.io/tutum/influxdb                   latest    c061e5808198  19 months ago    290 MB
#删除一个镜像

16、docker tag

标记本地镜像

实例操作如下:
[root@docker ~]# docker images
REPOSITORY           TAG        IMAGE ID            CREATED             SIZE
newdocker_images     v1.1.0     858cbd9ba687        39 seconds ago      62.2 MB
[root@docker ~]# docker tag newdocker_images:v1.1.0 newdocker_images:v2
[root@docker ~]# docker images
REPOSITORY           TAG        IMAGE ID            CREATED             SIZE
newdocker_images     v1.1.0     858cbd9ba687        4 minutes ago       62.2 MB
newdocker_images     v2         858cbd9ba687        4 minutes ago       62.2 MB
#从结果可以看出两个容器的ID是一样的,只是TAG改变了,类似于linux中文件与文件的硬链接一样,其两者的inode号相同。

17、docker build :

使用Dockerfile创建镜像

常用参数如下:
-f                          #指定要使用的Dockerfile路径
--label=[]              #设置镜像使用的元数据;
-m                        #设置内存最大值
--memory-swap   #设置Swap的最大值为内存+swap,"-1"表示不限swap
--no-cache          #创建镜像的过程不使用缓存
--pull                   #尝试去更新镜像的新版本
-q                       #安静模式,成功后只输出镜像ID
--rm                    #设置镜像成功后删除中间容器
--ulimit               #Ulimit配置

实例操作如下:

[root@docker ~]# docker build https://github.com/nginxinc/docker-nginx/

18、docker history

查看指定镜像的创建历史

[root@docker ~]# docker history newdocker_images:v2
IMAGE             CREATED          CREATED BY                                    SIZE      COMMENT
858cbd9ba687    32 minutes ago   -storage_driver=influxdb -storage_driver_d...   0 B       add new images
75f88e3ec333    5 months ago     /bin/sh -c #(nop)  ENTRYPOINT ["/usr/bin/c...   0 B
<missing>       5 months ago     /bin/sh -c #(nop)  EXPOSE 8080/tcp              0 B
<missing>       5 months ago     /bin/sh -c #(nop) ADD file:e138bb5c0c12107...   26.5 MB
<missing>       5 months ago     /bin/sh -c apk --no-cache add ca-certifica...   30.9 MB
<missing>       5 months ago     /bin/sh -c #(nop)  ENV GLIBC_VERSION=2.23-r3    0 B
<missing>       5 months ago     /bin/sh -c #(nop)  MAINTAINER dengnan@goog...   0 B
<missing>       5 months ago     /bin/sh -c #(nop)  CMD ["/bin/sh"]              0 B
<missing>       5 months ago     /bin/sh -c #(nop) ADD file:c05a199f603e2a9...   4.82 MB

19、docker info

显示 Docker 系统信息,包括镜像和容器数

实例操作如下:
[root@docker ~]# docker info
Containers: 4
 Running: 3
 Paused: 0
 Stopped: 1
Images: 5
Server Version: 1.13.1
Storage Driver: overlay2
 Backing Filesystem: xfs
 Supports d_type: true
 Native Overlay Diff: true
Logging Driver: journald
Cgroup Driver: systemd
Plugins: 
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: docker-runc runc
Default Runtime: docker-runc
Init Binary: /usr/libexec/docker/docker-init-current
containerd version:  (expected: aa8187dbd3b7ad67d8e5e3a15115d3eef43a7ed1)
runc version: e9c345b3f906d5dc5e8100b05ce37073a811c74a (expected: 9df8b306d01f59d3a8029be411de015b7304dd8f)
init version: 5b117de7f824f3d3825737cf09581645abbe35d4 (expected: 949e6facb77383876aeff8a6944dde66b3089574)
Security Options:
 seccomp
  WARNING: You're not using the default seccomp profile
  Profile: /etc/docker/seccomp.json
Kernel Version: 3.10.0-693.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 3
CPUs: 1
Total Memory: 7.64 GiB
Name: docker
ID: K7N6:CHF5:KAZP:QFDB:VYBP:IWMW:7VMV:L4TB:OJD2:SEZI:YRRR:4TJN
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false
Registries: docker.io (secure)

20、docker version

显示 Docker 版本信息

实例操作如下:
[root@docker ~]# docker version
Client:
 Version:         1.13.1
 API version:     1.26
 Package version: docker-1.13.1-63.git94f4240.el7.centos.x86_64
 Go version:      go1.9.4
 Git commit:      94f4240/1.13.1
 Built:           Fri May 18 15:44:33 2018
 OS/Arch:         linux/amd64

Server:
 Version:         1.13.1
 API version:     1.26 (minimum version 1.12)
 Package version: docker-1.13.1-63.git94f4240.el7.centos.x86_64
 Go version:      go1.9.4
 Git commit:      94f4240/1.13.1
 Built:           Fri May 18 15:44:33 2018
 OS/Arch:         linux/amd64
 Experimental:    false
上述就是docker容器中常用的20个命令,只有熟练掌握才能熟能生巧,遇到生产环境信手拈来都轻而易举,技术到家没有搞不定的环境与系统,docker就是这么强大!

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