Docker的常用命令

1、帮助命令

docker version #显示docker的版本信息
docker info  #显示docker的系统信息，包括镜像和容器的数量
docker 命令 --help  #帮助命令

官方帮助文档https://docs.docker.com/engine/reference/builder/

2、镜像命令

docker images 查看所有主机的命令

[root@izbp1doatyz9rmpmxs06naz ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED       SIZE
hello-world   latest    d1165f221234   5 weeks ago   13.3kB#名词解释
#REPOSITORY 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 镜像的大小#可选项
#   -a, --all             Show all images (default hides intermediate images) #列出所有镜像
#   -q, --quiet           Only show image IDs #只显示镜像id

docker search 搜索镜像

[root@izbp1doatyz9rmpmxs06naz ~]# docker search mysql
NAME                              DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
mysql                             MySQL is a widely used, open-source relation…   10753     [OK]
#可选项
-f, --filter filter   Filter output based on conditions provided
#使用  --filter=stars=5000
[root@izbp1doatyz9rmpmxs06naz ~]# docker search mysql --filter=stars=5000   #搜索出镜像stars大于3000的
NAME      DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
mysql     MySQL is a widely used, open-source relation…   10753     [OK]

docker pull 下载镜像

docker pull 镜像名[:tag镜像版本]
[root@izbp1doatyz9rmpmxs06naz ~]# docker pull mysql
Using default tag: latest #如果不写tag就默认下载最新版
latest: Pulling from library/mysql
f7ec5a41d630: Pull complete
9444bb562699: Pull complete
6a4207b96940: Pull complete
181cefd361ce: Pull complete
8a2090759d8a: Pull complete
15f235e0d7ee: Pull complete
d870539cd9db: Pull complete
5726073179b6: Pull complete
eadfac8b2520: Pull complete
f5936a8c3f2b: Pull complete
cca8ee89e625: Pull complete
6c79df02586a: Pull complete
Digest: sha256:6e0014cdd88092545557dee5e9eb7e1a3c84c9a14ad2418d5f2231e930967a38  #签名
Status: Downloaded newer image for mysql:latest
docker.io/library/mysql:latest #下载的真实地址#两者等价
docker pull mysql
docker.io/library/mysql:latest
#指定版本下载
[root@izbp1doatyz9rmpmxs06naz ~]# docker pull mysql:5.7
5.7: Pulling from library/mysql
f7ec5a41d630: Already exists #分层下载，如果有已经存在的就公用，能节省空间
9444bb562699: Already exists
6a4207b96940: Already exists
181cefd361ce: Already exists
8a2090759d8a: Already exists
15f235e0d7ee: Already exists
d870539cd9db: Already exists
7310c448ab4f: Pull complete
4a72aac2e800: Pull complete
b1ab932f17c4: Pull complete
1a985de740ee: Pull complete
Digest: sha256:e42a18d0bd0aa746a734a49cbbcc079ccdf6681c474a238d38e79dc0884e0ecc
Status: Downloaded newer image for mysql:5.7
docker.io/library/mysql:5.7

docker rmi 删除镜像

#单个镜像删除  docker rmi 容器id/镜像仓库：版本号
[root@izbp1doatyz9rmpmxs06naz ~]# docker rmi mysql:5.7
Untagged: mysql:5.7
Untagged: mysql@sha256:e42a18d0bd0aa746a734a49cbbcc079ccdf6681c474a238d38e79dc0884e0ecc
Deleted: sha256:450379344707c56f47d1391c18fc3ac22e2c59fbf384a0de77f2bdfc59bcbc61
Deleted: sha256:f524a8b23a8a8a9d862f6c0251b19365eda045117dae4f82bd9f16edcaf31402
Deleted: sha256:c18828290fa30349004e01790ede1117f82dd6ea26a74c83a6e985c7a3ffafdd
Deleted: sha256:33db070b2792af524b7a61a855835c813f3b06178d6103766a5c90024fe25a76
Deleted: sha256:556286c5cd9dae96e08fbef933278ca181e296098ee44ca083891e5739a87fdc
#多个镜像删除 docker rmi -f 容器id 容器id 容器id
#所有镜像删除  docker rmi -f $(docker images -aq)
[root@izbp1doatyz9rmpmxs06naz ~]# docker rmi -f $(docker images -aq) #-f删除所有镜像  -aq 显示镜像的镜像id
Untagged: mysql:latest
Untagged: mysql@sha256:6e0014cdd88092545557dee5e9eb7e1a3c84c9a14ad2418d5f2231e930967a38
Deleted: sha256:cbe8815cbea8fb86ce7d3169a82d05301e7dfe1a8d4228941f23f4f115a887f2
Deleted: sha256:c74b92ab7fde96874c2f7afa77e338ebe739b829f5cb28a9975c9b0dcb47feb9
Deleted: sha256:fded7187915726c2d2d18c8178cd70ab9aceab27f49a68ead928a662664b9402
Deleted: sha256:217ef0e6aab8111068df664529c4bdcfc2b58701913028fd0d61b00265ad5a9b
Deleted: sha256:1ab4dbca7ef7a8eb6f7ea8ddd780b5d55aac2a0098f2c217c68e31216a2de140
Deleted: sha256:1fbdda78e87b76772be16bd4a745db7f95d9af70d5a3728260548380121ae711
Deleted: sha256:cd35e2328f0670969657f1abae8beffbc1eb1fddbaf667e1e6e6286598500a35
Deleted: sha256:068b92efc0504adcd3c23f16fde80775a2f4dfe485e242206f638eae72c4fa1b
Deleted: sha256:7c8818a166d9666c68fcdbe421c30568d60d51a505e540f42901664113047a75
Deleted: sha256:5aa8f65565168fd7db2aa6b9f8fb1db746aa598fa3854dcbdbb49d5a29f6d8a5
Deleted: sha256:cca9d1bafa1ee67bb4d7178732c0955a40a5dea6e5b989f61248984f26f7306b
Deleted: sha256:34ca91e79c4027120ca740231d415c739cccad57d1ee68d6a6e67ca60bbaf3a4
Deleted: sha256:7e718b9c0c8c2e6420fe9c4d1d551088e314fe923dce4b2caf75891d82fb227d
Untagged: hello-world:latest
Untagged: hello-world@sha256:f2266cbfc127c960fd30e76b7c792dc23b588c0db76233517e1891a4e357d519
Deleted: sha256:d1165f2212346b2bab48cb01c1e39ee8ad1be46b87873d9ca7a4e434980a7726

3、容器命令

新建容器并启动镜像

 docker run [可选参数] image
#参数说明
--name="name" 容器的名，任意取，主要是用来区分容器
-d            后台方式启动
-it           交互方式启动，启动后进入容器
-p           指点容器的端口-p ip:主机端口:容器端口-p 主机端口:容器端口（使用最多）-p 容器端口
-P           随机指点端口#测试
[root@izbp1doatyz9rmpmxs06naz ~]# docker run -it centos /bin/bash
[root@e0b7620eb865 /]# ls
bin  etc   lib    lost+found  mnt  proc  run   srv  tmp  var
dev  home  lib64  media       opt  root  sbin  sys  usr
#从容器中退回宿主机
[root@e0b7620eb865 /]# exit
exit
[root@izbp1doatyz9rmpmxs06naz ~]#

docker ps 查看正在运行的容器

#docker ps [可选参数]#列出当前正在运行的容器
-a  #列出当前正在运行的容器和之前运行过的容器
-n=？#列出最近创建的？个容器
-q  #只显示容器编号[root@izbp1doatyz9rmpmxs06naz ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[root@izbp1doatyz9rmpmxs06naz ~]# docker ps -a
CONTAINER ID   IMAGE          COMMAND         CREATED          STATUS                      PORTS     NAMES
e0b7620eb865   centos         "/bin/bash"     7 minutes ago    Exited (0) 5 minutes ago              frosty_swanson
2ba95d8ae20b   centos         "/bin/centos"   7 minutes ago    Created                               determined_dubinsky
9c5505e3c614   d1165f221234   "/hello"        54 minutes ago   Exited (0) 54 minutes ago             pensive_wu

退出容器

#退出并停止
exit
#退出容器继续运行
ctrl+P+Q

docker rm 删除容器

docker rm 容器id   #删除指点的容器，不能删除正在运行的容器，如果要强制删除加 -f
docker rm -f $(docker ps -aq)   #删除所有容器
docker ps -a -q|xzrgs docker rm #删除所有容器

容器启动和停止操作

docker start 容器id    #启动容器
docker restart 容器id #重启容器
docker stop 容器id    #停止当前正在运行的容器
docker kill 容器id    #强制停止当前容器

4、常用的其他命令

后台启动容器

# docker run -d 镜像名
[root@izbp1doatyz9rmpmxs06naz ~]# docker run -d centos
0e749b886d65221ec8aefed414f9f3e7c7a8a137852ffbe37bb19ece46301ca0
[root@izbp1doatyz9rmpmxs06naz ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
#注意：后台方式启动容器，由于没有客户端，就会默认关闭。当使用docker ps查看当前正在运行的容器时，后台启动的容器已经停止。

docker logs查看日志

#docker logs -f -t --tall 10  容器
-tf         #显示日志
--tail number  #number 表示要显示的日志条数

查看容器中的进程信息

# docker top 容器id
[root@izbp1doatyz9rmpmxs06naz ~]# docker top b036d2f50c7e
UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD
root                12111               12058               0                   22:48               pts/0               00:00:00            /bin/bash

查看镜像元素

# docker inspect 容器id
[root@izbp1doatyz9rmpmxs06naz ~]# docker inspect b036d2f50c7e
[{"Id": "b036d2f50c7e3a16782d46c5144e204b20c2b4eb499357d9c6dd00663e559c4f","Created": "2021-04-16T14:48:13.627920583Z","Path": "/bin/bash","Args": [],"State": {"Status": "running","Running": true,"Paused": false,"Restarting": false,"OOMKilled": false,"Dead": false,"Pid": 12111,"ExitCode": 0,"Error": "","StartedAt": "2021-04-16T14:48:13.90601888Z","FinishedAt": "0001-01-01T00:00:00Z"},"Image": "sha256:300e315adb2f96afe5f0b2780b87f28ae95231fe3bdd1e16b9ba606307728f55","ResolvConfPath": "/var/lib/docker/containers/b036d2f50c7e3a16782d46c5144e204b20c2b4eb499357d9c6dd00663e559c4f/resolv.conf","HostnamePath": "/var/lib/docker/containers/b036d2f50c7e3a16782d46c5144e204b20c2b4eb499357d9c6dd00663e559c4f/hostname","HostsPath": "/var/lib/docker/containers/b036d2f50c7e3a16782d46c5144e204b20c2b4eb499357d9c6dd00663e559c4f/hosts","LogPath": "/var/lib/docker/containers/b036d2f50c7e3a16782d46c5144e204b20c2b4eb499357d9c6dd00663e559c4f/b036d2f50c7e3a16782d46c5144e204b20c2b4eb499357d9c6dd00663e559c4f-json.log","Name": "/frosty_gagarin","RestartCount": 0,"Driver": "overlay2","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,"CgroupnsMode": "host","Dns": [],"DnsOptions": [],"DnsSearch": [],"ExtraHosts": null,"GroupAdd": null,"IpcMode": "private","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,"DeviceRequests": null,"KernelMemory": 0,"KernelMemoryTCP": 0,"MemoryReservation": 0,"MemorySwap": 0,"MemorySwappiness": null,"OomKillDisable": false,"PidsLimit": null,"Ulimits": null,"CpuCount": 0,"CpuPercent": 0,"IOMaximumIOps": 0,"IOMaximumBandwidth": 0,"MaskedPaths": ["/proc/asound","/proc/acpi","/proc/kcore","/proc/keys","/proc/latency_stats","/proc/timer_list","/proc/timer_stats","/proc/sched_debug","/proc/scsi","/sys/firmware"],"ReadonlyPaths": ["/proc/bus","/proc/fs","/proc/irq","/proc/sys","/proc/sysrq-trigger"]},"GraphDriver": {"Data": {"LowerDir": "/var/lib/docker/overlay2/4f87e5486f8328b5d83f13462ba89461ada5a45f304f47afd4483e57a61e57f3-init/diff:/var/lib/docker/overlay2/e8995a45012a96df4b82e0128c2bdf8db3c3c45a3d738e4789a87b19adea9776/diff","MergedDir": "/var/lib/docker/overlay2/4f87e5486f8328b5d83f13462ba89461ada5a45f304f47afd4483e57a61e57f3/merged","UpperDir": "/var/lib/docker/overlay2/4f87e5486f8328b5d83f13462ba89461ada5a45f304f47afd4483e57a61e57f3/diff","WorkDir": "/var/lib/docker/overlay2/4f87e5486f8328b5d83f13462ba89461ada5a45f304f47afd4483e57a61e57f3/work"},"Name": "overlay2"},"Mounts": [],"Config": {"Hostname": "b036d2f50c7e","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"],"Image": "centos","Volumes": null,"WorkingDir": "","Entrypoint": null,"OnBuild": null,"Labels": {"org.label-schema.build-date": "20201204","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": "51bc082c6c0e4190c7f211b07de4f4578862e29851b358b7d5f901b717d916dc","HairpinMode": false,"LinkLocalIPv6Address": "","LinkLocalIPv6PrefixLen": 0,"Ports": {},"SandboxKey": "/var/run/docker/netns/51bc082c6c0e","SecondaryIPAddresses": null,"SecondaryIPv6Addresses": null,"EndpointID": "d33ad82c1b5ccbd7281d9b50c3155364be8640067ecfb5df1d7e29a5cab222e4","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": "d34453a0b9284337290b54d39b9960b1eac0385699c78ca71552ccdb6b5fc30c","EndpointID": "d33ad82c1b5ccbd7281d9b50c3155364be8640067ecfb5df1d7e29a5cab222e4","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}}}}
]

进入当前正在运行的容器

# docker exec -it 容器id /bin/bash
[root@izbp1doatyz9rmpmxs06naz ~]# docker exec -it b036d2f50c7e /bin/bash
[root@b036d2f50c7e /]# # docker attach 容器id
[root@izbp1doatyz9rmpmxs06naz ~]# docker attach b036d2f50c7e
[root@b036d2f50c7e /]# #两者区别
#docker exec #进入容器后开启一个新的终端，在里面进行操作
#docker attach #进入容器正在执行的终端，不会启动新的进程

从容器内拷贝文件到宿主机

docker cp 容器id：容器内路径  宿主机路径

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