title: Prometheus not starting
body: <p>There was some storage space added to a bastion host where Prometheus is running, pulling metrics from 6 Cassandra nodes. Since then Prometheus is not starting. In the error message it says:  </p>
  
  <blockquote>
    <p>Opening storage failed open
    /data/prometheus/01D8GR67YKKZM51V4EPEQ4XH9J/meta.json: permission
    denied</p>
  </blockquote>
  
  <p>But as you can see below, Prometheus is being started with <code>sudo</code> and the file is set to <code>ec2-user</code>.<br>
  I suppose you'll need more info to help me, but I'm not that proficient with Prometheus, so let me know what other info might be useful to debug this, and I'll update the post. </p>
  
  <p><a href="https://i.stack.imgur.com/wcPqU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wcPqU.png" alt="enter image description here"></a></p>