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Monitoring OPAL

There are multiple ways you can monitor your OPAL deployment:

  • Logs - Using the structured logs outputted to stderr by both the OPAL-servers and OPAL-clients
  • Health-checks - Using the health-checks feature (You can query each OPAL client health-check / or even create a specific Rego policy to query which uses that health-check state)
  • Callbacks - Using the callback webhooks feature - having OPAL-clients report their updates
  • Statistics - Using the built-in statistics feature in OPAL (See below)

OPAL Statistics​

By enabling OPAL_STATISTICS_ENABLED=true (on both servers and clients), the OPAL-Server would start maintaining a unified state fo all the clients and which topics they've subscribed to. The state can then be retrieved as a JSON object by calling the /statistics api route on the server

Code Reference: