title: helm values from kubernetes secrets?
body: <p>I am using this chart : <a href="https://github.com/helm/charts/tree/master/stable/prometheus-mongodb-exporter" rel="noreferrer">https://github.com/helm/charts/tree/master/stable/prometheus-mongodb-exporter</a></p>
  
  <p>This chart requires <code>MONGODB_URI</code> environment variable or <code>mongodb.uri</code> populated in <code>values.yaml</code> file,
  Since this is a connection string I don't want to check-in that into git.
  I was thinking of kubernetes secrets and provide the connection string from kubernetes secrets. I have not been able to successfully find a solution for this one.</p>
  
  <p>I also tried creating another helm chart and using this one as a dependency for that chart and provide value for <code>MONGODB_URI</code> from <code>secrets.yaml</code> but that also didn't work because in <code>prometheus-mongodb-exporter</code> chart <code>MONGODB_URI</code> is defined as a required value which is then passed into <code>secrets.yaml</code> file within that chart, so dependency chart never gets installed because of that.</p>
  
  <p>What would be the best way of achieving this?</p>