CODEWITHSUNDEEP
pythondocker
Shawn
Shawn

Reputation: 21

docker remote api cannot bind a port to a host

I was trying to use docker's remote api to bind a host, but it always fails.

I pass this dict using python and urllib2:

{
    'Tty':True,
    'Volumes':[],
    'Image':'ubuntu',
    'Cmd':'',
    'WorkingDir':None,
    'Entrypoint':None,
    'Env':None,
    'AttachStdin':False,
    'AttachStdout':True,
    'AttachStderr':True,
    'OpenStdin':True,
    'ExposedPorts':{'80/tcp':{}},
    'HostConfig':{'PortBindings':{'80/tcp':['15080']}}
}

Then I use remote api to inspect container, it gives me the following:

"NetworkSettings":{
    "Bridge":"docker0",
    "Gateway":"172.17.42.1",
    "IPAddress":"172.17.0.48",
    "IPPrefixLen":16,
    "PortMapping":null,
    "Ports":{"22/tcp":null,"80/tcp":null}
}

I also tried to use the method in this link Binding a port to a host interface using the REST API, but when I posted data to start the container, it will raise HTTP Error 500. So I guess whether the docker remote api had been changed.

Upvotes: 2

Views: 729

Answers (1)

Alex
Alex

Reputation: 8539

Looks like your PortBindings parameter is slightly off. You're missing "HostPort":

Change it to:

'HostConfig':{'PortBindings':{'80/tcp':[{ "HostPort": '15080' }] }}

From the docs:

  • PortBindings - A map of exposed container ports and the host port they should map to. It should be specified in the form { <port>/<protocol>: [{ "HostPort": "<port>" }] } Take note that port is specified as a string and not an integer value.

Upvotes: 2

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