title: JupyterHub is failing due "didn't respond in 30 seconds" and "Back-off restarting failed container"
body: <p>I'm trying to run JupyterHub locally with Kind and Helm 3.</p>
  
  <p>To launch it:</p>
  
  <pre><code>kind create cluster
  
  RELEASE=jhub
  NAMESPACE=jhub
  kubectl create namespace ${NAMESPACE}
  helm upgrade --install ${RELEASE} jupyterhub/jupyterhub \
    --namespace ${NAMESPACE}  \
    --version=0.8.2 \
    --values config.yaml
  
  kubectl -n jhub port-forward service/proxy-public 8000:80
  </code></pre>
  
  <p>config.yaml is pretty minimal:</p>
  
  <pre><code>proxy:                                                                                                                                                        
    secretToken: "token_goes_here" 
    service:
      type: ClusterIP
  hub:
    uid: 0
    fsGid: 0
    extraConfig:
      myConfig.py: |
        c.JupyterHub.spawner_class = 'kubespawner.KubeSpawner'
  </code></pre>
  
  <p><a href="http://localhost:8000/" rel="nofollow noreferrer">http://localhost:8000/</a> works beautifully, I log in and the Hub is trying to launch my single user image. But it is failing with:</p>
  
  <blockquote>
    <p>Server requested
    2019-11-14 14:59:50+00:00 [Normal] Successfully assigned jhub/jupyter-user1 to kind-control-plane</p>
    
    <p>2019-11-14 14:59:51+00:00 [Normal] Container image "jupyterhub/k8s-singleuser-sample:0.8.2" already present on machine</p>
    
    <p>2019-11-14 14:59:51+00:00 [Normal] Created container notebook
    Spawn failed: Server at <a href="http://10.244.0.10:8888/user/user1/" rel="nofollow noreferrer">http://10.244.0.10:8888/user/user1/</a> didn't respond in 30 seconds</p>
  </blockquote>
  
  <p>And sometimes, I'm getting:</p>
  
  <blockquote>
    <p>[Warning] "Back-off restarting failed container"</p>
  </blockquote>