运行一个web应用
在docker容器中运行一个Python Flask应用
1 | $ docker run -d -P training/webapp python app.py |
- -d:让容器在后台运行。
- -P:将容器内部使用的网络端口映射到我们使用的主机上。可以指定如 -p 5000:5000
查看容器状态，Docker开放了5000 端口（默认 Python Flask 端口）映射到主机端口32769 上
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2
3$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
069a387381ee training/webapp "python app.py" About a minute ago Up About a minute 0.0.0.0:32769->5000/tcp elastic_austin1
2$ docker run -d -p 5000:5000 training/webapp python app.py
cdbdd07a3c088237c15630216fd98e6e7cab74c6f96d80445814b0641e258e221
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3
4$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cdbdd07a3c08 training/webapp "python app.py" 7 seconds ago Up 6 seconds 0.0.0.0:5000->5000/tcp cocky_nightingale
069a387381ee training/webapp "python app.py" 5 minutes ago Up 5 minutes 0.0.0.0:32769->5000/tcp elastic_austin查看容器端口
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5$ docker port cdbdd07a3c08
5000/tcp -> 0.0.0.0:5000
$ docker port cocky_nightingale
5000/tcp -> 0.0.0.0:5000浏览器访问和查看后台日志
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4$ docker logs -f elastic_austin
* Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
172.17.0.1 - - [25/Apr/2017 09:53:34] "GET / HTTP/1.1" 200 -
172.17.0.1 - - [25/Apr/2017 09:53:35] "GET /favicon.ico HTTP/1.1" 404 -查看WEB应用程序容器中的进程
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2
3$ docker top elastic_austin
PID USER TIME COMMAND
5629 root 0:06 python app.py检查WEB应用程序
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181$ docker inspect elastic_austin
[
{
"Id": "069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658",
"Created": "2017-04-25T04:27:56.868358836Z",
"Path": "python",
"Args": [
"app.py"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 5629,
"ExitCode": 0,
"Error": "",
"StartedAt": "2017-04-25T04:27:58.496773504Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:6fae60ef344644649a39240b94d73b8ba9c67f898ede85cf8e947a887b3e6557",
"ResolvConfPath": "/var/lib/docker/containers/069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658/hostname",
"HostsPath": "/var/lib/docker/containers/069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658/hosts",
"LogPath": "/var/lib/docker/containers/069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658/069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658-json.log",
"Name": "/elastic_austin",
"RestartCount": 0,
"Driver": "aufs",
"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": "",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": true,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": null,
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DiskQuota": 0,
"KernelMemory": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": -1,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0
},
"GraphDriver": {
"Name": "aufs",
"Data": null
},
"Mounts": [],
"Config": {
"Hostname": "069a387381ee",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"5000/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"python",
"app.py"
],
"Image": "training/webapp",
"Volumes": null,
"WorkingDir": "/opt/webapp",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "b3e41e0db8241c4343d293e0ad9042d115781366c95af4c9485afefd4a95c14f",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"5000/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "32769"
}
]
},
"SandboxKey": "/var/run/docker/netns/b3e41e0db824",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "2c1b0818134f62205c3413aa58a40a8d8d1bfa49c22392d4759a7d1cf59f0f90",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:03",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "45dfed77714f8c6e748e8d910dd6979b40214339b948b26b212291c728441b40",
"EndpointID": "2c1b0818134f62205c3413aa58a40a8d8d1bfa49c22392d4759a7d1cf59f0f90",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:03"
}
}
}
}
]停止(stop)和重启
1
2$ docker start elastic_austin
elastic_austin移除WEB应用容器【先停止】
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8$ docker rm elastic_austin
Error response from daemon: You cannot remove a running container 069a387381ee5b218de850023e6fc9160b82402a06087f196049c56186c1b658. Stop the container before attempting removal or use -f
$ docker stop elastic_austin
elastic_austin
$ docker rm elastic_austin
elastic_austin
