title: gitlab-runner on kubernetes on raspberry pi - container "helper" not found
body: <p>I'm trying to run gitlab-runner on my kubernetes cluster on raspberry pi. </p>
  
  <p>The gitlab pipeline generates the following output:</p>
  
  <pre><code>Running with gitlab-runner 10.4.0 (857480b6) on hello-world-gitlab-runner-6548-tq4mr (123)
  Using Kubernetes namespace: gitlab
  Using Kubernetes executor with image arm32v7/node ...
  Waiting for pod gitlab/runner-123-project-456-concurrent-789 to be running, status is Pending
  Waiting for pod gitlab/runner-123-project-456-concurrent-789 to be running, status is Pending
  Waiting for pod gitlab/runner-123-project-456-concurrent-789 to be running, status is Pending
  ERROR: Job failed (system failure): unable to upgrade connection: container not found ("helper")
  </code></pre>
  
  <p>The gitlab-runner pod logs the following output: </p>
  
  <pre><code>+ cp /scripts/config.toml /etc/gitlab-runner/
  + /entrypoint register --non-interactive --executor kubernetes
  Running in system-mode.                            
  
  Registering runner... succeeded                     runner=xyz
  Runner registered successfully. Feel free to start it, but if it's running already the config should be automatically reloaded! 
  + /entrypoint run --user=gitlab-runner --working-directory=/home/gitlab-runner
  Starting multi-runner from /etc/gitlab-runner/config.toml ...  builds=0
  Running in system-mode.                            
  
  Configuration loaded                                builds=0
  Metrics server disabled                            
  Checking for jobs... received                       job=63348569 repo_url=https://gitlab.com/mypublicaccount/helloworld-docker.git runner=123
  ERROR: Job failed (system failure): unable to upgrade connection: container not found ("helper")  job=456 project=789 runner=123
  Checking for jobs... received                       job=456 repo_url=https://gitlab.com/mypublicaccount/helloworld-docker.git runner=789
  ERROR: Job failed (system failure): unable to upgrade connection: container not found ("helper")  job=123 project=456 runner=789
  </code></pre>
  
  <p>Any idea to fix this? </p>