RuntimeError: Failed to get port info

[grant-guo]

I use docker 'host' network in order to visit some resources on the network where the host is sitting , got the error "Failed to get port info", here is configuration:

c.JupyterHub.hub_ip = '10.0.0.5'
c.JupyterHub.ip = '10.0.0.5'
c.JupyterHub.admin_access = True

c.JupyterHub.spawner_class = 'dockerspawner.DockerSpawner'
c.DockerSpawner.image = 'jupyter/all-spark-notebook'
c.DockerSpawner.host_ip = '0.0.0.0'
c.DockerSpawner.extra_host_config = { 'network_mode': 'host' }

I saw the source code says, if using 'host' network, need to override 'get_ip_and_port'. I have limited knowledge about python, anyone can show me how to configure it?

[limimiking]

I've also encountered this problem, I solved it in this way:

from tornado import gen
from dockerspawner import DockerSpawner
class DockerSpawner_host(DockerSpawner):
@gen.coroutine
def get_ip_and_port(self):
return self.host_ip, self.port
c.DockerSpawner_host.use_internal_ip = False

Put the above code in the jupyterhub_config.py, just before your DockerSpawner configs. In this way, the DockerSpawner_host becomes your new version of DockerSpawner. you should modify your other configurations and replace DockerSpawner with DockerSpawner_host. Hope that will help.