Polling frequency when attempting to connect to notebook container

[isuftin]

Is there a flag to allow setting the polling frequency for JupyterHub's polling of a starting notebook container? It seems to be polling 5 to 10 times per second which floods the service logs and I assume puts a decent load on the Docker network.

Example of JupyterHub's service logs when a container is being started (but the image not yet downloaded from the registry):

jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:16.156 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:16.375 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:16.594 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:16.808 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:17.025 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:17.239 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:17.455 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:17.672 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:17.924 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:18.138 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:18.376 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:18.590 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:18.805 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:19.028 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:19.245 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:19.460 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:19.694 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:19.909 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:20.124 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:20.350 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:20.565 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:20.782 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:20.999 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:21.218 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:21.433 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:21.646 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:21.866 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:22.082 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:22.299 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:22.512 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:22.728 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:22.946 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:23.168 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:23.383 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:23.604 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:23.821 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:24.036 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:24.264 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:24.490 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:24.706 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:24.924 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:25.143 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:25.371 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:25.591 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:25.812 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:26.024 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:26.244 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:26.458 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:26.678 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:26.895 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:27.149 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:27.419 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:27.646 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)
jupyterhub_jupyterhub.1.0fe08onaa24h@manager    | [W 2017-08-24 15:13:27.860 JupyterHub utils:88] Failed to connect to http://jupyter-5d9c68c6c50ed3d02a2fcf54f63993b6-1:8888/user/testuser ([Errno -2] Name or service not known)

[barrachri]

No actually no.

Feel free to send a PR :)