容器运行但不能在浏览器中访问

我遵循http://containertutorials.com/docker-compose/flask-compose.html并有一个正在运行的容器。

$ docker-compose up Starting flaskcomposedockerexample_web_1 Attaching to flaskcomposedockerexample_web_1 web_1 | * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit) web_1 | * Restarting with stat web_1 | * Debugger is active! $ docker logs d66ca374c99a * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit) * Restarting with stat * Debugger is active! * Debugger PIN: 249-821-232 

去浏览器或curl将无法连接：

 This site can't be reached 127.0.0.1 refused to connect. $ curl 127.0.0.1:5000 curl: (7) Failed to connect to 127.0.0.1 port 5000: Connection refused 

为什么没有错误的容器无法访问？ 谢谢

 $ netstat Active Internet connections Proto Recv-Q Send-Q Local Address Foreign Address (state) tcp4 0 0 142.25.150.89.57766 stackoverflow.co.https ESTABLISHED tcp4 0 0 142.25.150.89.56837 8.36.126.32.http ESTABLISHED tcp4 0 0 localhost.56800 localhost.56800 ESTABLISHED tcp4 0 0 localhost.56801 localhost.56801 ESTABLISHED $ docker inspect d66ca374c99a [ { "Id": "d66ca374c99afb13a2bee56fa44fd73f4c39569edcf8c50f175bf5a124a57a73", "Created": "2017-04-18T14:08:54.859932607Z", "Path": "python", "Args": [ "app.py" ], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 14402, "ExitCode": 0, "Error": "", "StartedAt": "2017-04-18T14:09:28.342011012Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:1b3ceada8dd91e8a4403e7ee001b7a4832f72120162f8788651c3301f5ccfa89", "ResolvConfPath": "/mnt/sda1/var/lib/docker/containers/d66ca374c99afb13a2bee56fa44fd73f4c39569edcf8c50f175bf5a124a57a73/resolv.conf", "HostnamePath": "/mnt/sda1/var/lib/docker/containers/d66ca374c99afb13a2bee56fa44fd73f4c39569edcf8c50f175bf5a124a57a73/hostname", "HostsPath": "/mnt/sda1/var/lib/docker/containers/d66ca374c99afb13a2bee56fa44fd73f4c39569edcf8c50f175bf5a124a57a73/hosts", "LogPath": "/mnt/sda1/var/lib/docker/containers/d66ca374c99afb13a2bee56fa44fd73f4c39569edcf8c50f175bf5a124a57a73/d66ca374c99afb13a2bee56fa44fd73f4c39569edcf8c50f175bf5a124a57a73-json.log", "Name": "/flaskcomposedockerexample_web_1", "RestartCount": 0, "Driver": "aufs", "MountLabel": "", "ProcessLabel": "", "AppArmorProfile": "", "ExecIDs": null, "HostConfig": { "Binds": [ "/Users/cchilders/flask_compose_docker_example:/code:rw" ], "ContainerIDFile": "", "LogConfig": { "Type": "json-file", "Config": {} }, "NetworkMode": "default", "PortBindings": { "5000/tcp": [ { "HostIp": "", "HostPort": "5000" } ] }, "RestartPolicy": { "Name": "", "MaximumRetryCount": 0 }, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": [], "CapAdd": null, "CapDrop": null, "Dns": null, "DnsOptions": null, "DnsSearch": null, "ExtraHosts": null, "GroupAdd": null, "IpcMode": "", "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": null, "BlkioDeviceReadBps": null, "BlkioDeviceWriteBps": null, "BlkioDeviceReadIOps": null, "BlkioDeviceWriteIOps": null, "CpuPeriod": 0, "CpuQuota": 0, "CpuRealtimePeriod": 0, "CpuRealtimeRuntime": 0, "CpusetCpus": "", "CpusetMems": "", "Devices": null, "DeviceCgroupRules": null, "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": { "Data": null, "Name": "aufs" }, "Mounts": [ { "Type": "bind", "Source": "/Users/cchilders/flask_compose_docker_example", "Destination": "/code", "Mode": "rw", "RW": true, "Propagation": "" } ], "Config": { "Hostname": "d66ca374c99a", "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": [ "app.py" ], "ArgsEscaped": true, "Image": "flaskcomposedockerexample_web", "Volumes": { "/code": {} }, "WorkingDir": "/app", "Entrypoint": [ "python" ], "OnBuild": null, "Labels": { "com.docker.compose.config-hash": "3c65c28cc5926f591068f82a4d028ae50573b14ac4059ebe17b196be2185995a", "com.docker.compose.container-number": "1", "com.docker.compose.oneoff": "False", "com.docker.compose.project": "flaskcomposedockerexample", "com.docker.compose.service": "web", "com.docker.compose.version": "1.11.2" } }, "NetworkSettings": { "Bridge": "", "SandboxID": "6b4cd91f76cb21f70fc7b1b17e403f21ef790cc1e02fee5547740ac5192229fe", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": { "5000/tcp": [ { "HostIp": "0.0.0.0", "HostPort": "5000" } ] }, "SandboxKey": "/var/run/docker/netns/6b4cd91f76cb", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "e05d8bf26815734a146d6f4b1fb803b365629dfce732a2b21993970a33e54a80", "Gateway": "162.16.0.1", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "162.16.0.4", "IPPrefixLen": 16, "IPv6Gateway": "", "MacAddress": "02:42:bd:55:00:04", "Networks": { "bridge": { "IPAMConfig": null, "Links": null, "Aliases": null, "NetworkID": "2fd3c33ec08105cd00de10ab5555554572bac4548866239aa375e8df60ed3aa", "EndpointID": "e05d8bf26815734a146d6f4b1fb80555559dfce732a2b21993970a33e54a80", "Gateway": "162.16.0.1", "IPAddress": "162.16.0.4", "IPPrefixLen": 16, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:44:00:04" } } } } ] $ netstat -tnlp netstat: option requires an argument -- p Usage: netstat [-AaLlnW] [-f address_family | -p protocol] netstat [-gilns] [-f address_family] netstat -i | -I interface [-w wait] [-abdgRtS] netstat -s [-s] [-f address_family | -p protocol] [-w wait] netstat -i | -I interface -s [-f address_family | -p protocol] netstat -m [-m] netstat -r [-Aaln] [-f address_family] netstat -rs [-s] $ netstat -tnpl netstat: l: unknown or uninstrumented protocol 

Answer 1

首先有两个问题，你所指的教程在app.py的第一行应该是语法错误

 from flask import Flask 

其次，docker在Mac上的工作方式不同，windows docker并不直接将端口映射到本地主机，而是创build一个大小约为24 MB的非常小的Linux虚拟机，然后在这个虚拟机中运行容器也称为docker机，所以不是将端口映射到本地docker，而是将docker映射到docker机，以便您的容器可以被访问

 http://docker_machine_ip:port_no 

代替

 http://localhost:port_no 

默认的泊坞窗机器ip可以使用find

  docker-machine ip dev