<p>I've previously installed tiller into a specific namespace.</p>

<p>I set an environment variable to set the 'tiller' namespace - but I can't remember what this environment variable was called - and can't seem to find it via a web search.</p>

<p>What is this key?</p>

<p>By executing <em>helm -h</em> you can see the list of environment variables it uses:</p>

<pre><code>Environment:
  $HELM_HOME          set an alternative location for Helm files. By default, these are stored in ~/.helm
  $HELM_HOST          set an alternative Tiller host. The format is host:port
  $HELM_NO_PLUGINS    disable plugins. Set HELM_NO_PLUGINS=1 to disable plugins.
  $TILLER_NAMESPACE   set an alternative Tiller namespace (default "kube-system")
  $KUBECONFIG         set an alternative Kubernetes configuration file (default "~/.kube/config")
  $HELM_TLS_CA_CERT   path to TLS CA certificate used to verify the Helm client and Tiller server certificates (default "$HELM_HOME/ca.pem")
  $HELM_TLS_CERT      path to TLS client certificate file for authenticating to Tiller (default "$HELM_HOME/cert.pem")
  $HELM_TLS_KEY       path to TLS client key file for authenticating to Tiller (default "$HELM_HOME/key.pem")
  $HELM_TLS_VERIFY    enable TLS connection between Helm and Tiller and verify Tiller server certificate (default "false")
  $HELM_TLS_ENABLE    enable TLS connection between Helm and Tiller (default "false")
</code></pre>
