我跟着http://containertutorials.com/docker-compose/flask-compose.html并且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
转到浏览器或卷曲将无法连接：
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
为什么无法访问没有错误的容器？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
答案 0 :(得分：3)
首先你要引用的教程在app.py的第一行中有语法错误有两个问题应该是
from flask import Flask
其次，docker在Mac上的工作方式不同，windows docker并没有直接将端口映射到本地Host而不是docker创建一个大小约为24 mb的非常小的Linux虚拟机，然后在其中运行容器这个虚拟机也称为docker机器，所以不是将端口映射到localhost docker而是将它映射到docker机器，这样你的容器就可以访问了
http://docker_machine_ip:port_no
而不是
http://localhost:port_no
可以使用
找到默认的docker machine ip docker-machine ip dev