title: Does Grafana support equality/binary operators in the Variable section?
body: <p>I'm creating a dashboard to show the canary instance data.  I am planning to create a variable that contains the canary instance IPs and we always create one instance in a stack for the canary. So we can assume that if a stack contains one instance then it should be a canary instance.</p>
  <p>The below query will provide the canary instance hostname/ip.</p>
  <blockquote>
  <p>count by(location,environment)(cadvisor_version_info{aws_cloudformation_stack_name=~&quot;.<em>Green.</em>&quot;,cloud=~&quot;${cloud}&quot;,location=~&quot;${location}&quot;,environment=~&quot;${environment}&quot;})
  == 1</p>
  </blockquote>
  <p>Is it possible to create a variable with the above query? Does Grafana support equality/binary operators in the Variable section?</p>