启动一个简单的web 应用
使用社区提供的模板,启动一个简单的web应用,熟悉下各种Docker命令的使用:
[plain] view plain copy
- # docker run -d -P training/webapp python app.py
- Unable to find image ‘training/webapp‘ locally
- Pulling repository training/webapp
- 31fa814ba25a: Download complete
- 511136ea3c5a: Download complete
- f10ebce2c0e1: Download complete
- 82cdea7ab5b5: Download complete
- 5dbd9cb5a02f: Download complete
- 74fe38d11401: Download complete
- 64523f641a05: Download complete
- 0e2afc9aad6e: Download complete
- e8fc7643ceb1: Download complete
- 733b0e3dbcee: Download complete
- a1feb043c441: Download complete
- e12923494f6a: Download complete
- a15f98c46748: Download complete
- Status: Downloaded newer image for training/webapp:latest
- d00f94a31e8767271f68ab72eab15a8e805c416b0636877f22a31572d10b718d
-d
启动一个daemon并在后台运行
-P
映射一个网络端口
training/webapp
docker社区提供的,预先创建好的模板,里面包含一个简单的Python Flask web应用
[plain] view plain copy
- # docker ps -l
- CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
- d00f94a31e87 training/webapp:latest "python app.py" 59 seconds ago Up 56 seconds 0.0.0.0:49153->5000/tcp hopeful_lalande
-l 查看详细信息
PORTS显示 0.0.0.0:49153->5000/tcp
意思是将Container中的5000端口,映射到host的49153端口。5000是Python Flask 的默认端口。
也可以使用 -p container-port:host-port
命令来指定映射端口号
[plain] view plain copy
- # docker run -d -p 5000:5000 training/webapp python app.py
查看web应用信息
查看名为hopeful_lalande的docker container中,5000端口的映射信息
[plain] view plain copy
- # docker port hopeful_lalande 5000
- 0.0.0.0:49153
查看web应用日志
[plain] view plain copy
- # docker logs -f hopeful_lalande
- * Running on http://0.0.0.0:5000/
- 192.168.254.1 - - [17/Dec/2014 02:30:32] "GET / HTTP/1.1" 200 -
- 192.168.254.1 - - [17/Dec/2014 02:30:32] "GET /favicon.ico HTTP/1.1" 404 -
- 192.168.254.1 - - [17/Dec/2014 02:30:32] "GET /favicon.ico HTTP/1.1" 404 -
-f
持续查看container日志的标准化输出,类似tail -f
查看进程详细信息
[plain] view plain copy
- # docker top hopeful_lalande
- UID PID PPID C STIME TTY TIME CMD
- root 15189 2447 0 10:24 ? 00:00:00 python app.py
查看web应用容器详细信息
[plain] view plain copy
- # docker inspect hopeful_lalande
- [{
- "AppArmorProfile": "",
- "Args": [
- "app.py"
- ],
- "Config": {
- "AttachStderr": false,
- "AttachStdin": false,
- "AttachStdout": false,
- "Cmd": [
- "python",
- "app.py"
- ],
- "CpuShares": 0,
- "Cpuset": "",
- "Domainname": "",
- "Entrypoint": null,
- "Env": [
- "HOME=/",
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
- ],
- "ExposedPorts": {
- "5000/tcp": {}
- },
- "Hostname": "d00f94a31e87",
- "Image": "training/webapp",
- "Memory": 0,
- "MemorySwap": 0,
- "NetworkDisabled": false,
- "OnBuild": null,
- "OpenStdin": false,
- "PortSpecs": null,
- "StdinOnce": false,
- "Tty": false,
- "User": "",
- "Volumes": null,
- "WorkingDir": "/opt/webapp"
- },
- "Created": "2014-12-17T02:24:09.468631143Z",
- "Driver": "devicemapper",
- "ExecDriver": "native-0.2",
- "HostConfig": {
- "Binds": null,
- "CapAdd": null,
- "CapDrop": null,
- "ContainerIDFile": "",
- "Devices": [],
- "Dns": null,
- "DnsSearch": null,
- "ExtraHosts": null,
- "Links": null,
- "LxcConf": [],
- "NetworkMode": "bridge",
- "PortBindings": {},
- "Privileged": false,
- "PublishAllPorts": true,
- "RestartPolicy": {
- "MaximumRetryCount": 0,
- "Name": ""
- },
- "SecurityOpt": null,
- "VolumesFrom": null
- },
- "HostnamePath": "/var/lib/docker/containers/d00f94a31e8767271f68ab72eab15a8e805c416b0636877f22a31572d10b718d/hostname",
- "HostsPath": "/var/lib/docker/containers/d00f94a31e8767271f68ab72eab15a8e805c416b0636877f22a31572d10b718d/hosts",
- "Id": "d00f94a31e8767271f68ab72eab15a8e805c416b0636877f22a31572d10b718d",
- "Image": "31fa814ba25ae3426f8710df7a48d567d4022527ef2c14964bb8bc45e653417c",
- "MountLabel": "",
- "Name": "/hopeful_lalande",
- "NetworkSettings": {
- "Bridge": "docker0",
- "Gateway": "172.17.42.1",
- "IPAddress": "172.17.0.8",
- "IPPrefixLen": 16,
- "MacAddress": "02:42:ac:11:00:08",
- "PortMapping": null,
- "Ports": {
- "5000/tcp": [
- {
- "HostIp": "0.0.0.0",
- "HostPort": "49153"
- }
- ]
- }
- },
- "Path": "python",
- "ProcessLabel": "",
- "ResolvConfPath": "/var/lib/docker/containers/d00f94a31e8767271f68ab72eab15a8e805c416b0636877f22a31572d10b718d/resolv.conf",
- "State": {
- "ExitCode": 0,
- "FinishedAt": "0001-01-01T00:00:00Z",
- "Paused": false,
- "Pid": 15189,
- "Restarting": false,
- "Running": true,
- "StartedAt": "2014-12-17T02:24:11.279426855Z"
- },
- "Volumes": {},
- "VolumesRW": {}
- }
- ]
输出一个JSON格式的Docker container配置和状态。
也可以通过指定名称,获取某项信息值,如下:
[plain] view plain copy
- # docker inspect -f ‘{{ .NetworkSettings.IPAddress }}‘ hopeful_lalande
- 172.17.0.8
停止Web应用
[plain] view plain copy
- # docker stop hopeful_lalande
- hopeful_lalande
停止后,可以使用docker ps -a命令,列出之前所有docker容器
[plain] view plain copy
- # docker ps -a
- CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
- d00f94a31e87 training/webapp:latest "python app.py" 21 minutes ago Exited (-1) 43 seconds ago hopeful_lalande
- 7f22b335fb2c fedora:latest "/bin/sh -c ‘while t 49 minutes ago Exited (-1) 40 minutes ago silly_archimedes
- 。。。
重启Web应用
[plain] view plain copy
- # docker start hopeful_lalande
- hopeful_lalande
删除Web应用
[plain] view plain copy
- # docker rm hopeful_lalande
- Error response from daemon: You cannot remove a running container. Stop the container before attempting removal or use -f
- 2014/12/17 10:49:32 Error: failed to remove one or more containers
提示无法删除一个正在运行的container。
停止该container后,重新执行上条命令,成功删除container
时间: 2024-10-26 12:48:34