service:cluster-lab-ollama: demo-ollama-health: got HTTP 502, expected 200 via dhtc01:11434 Friday 24th July 2026 22:23:40

(advisory — machine-generated by hermes3:8b, ~592 tokens; not verified. This is the LLM's own note; the operator writes their own write-up separately.)

What happened: During the incident, the demo-ollama-health endpoint in the self-hosted compose-orchestration cluster experienced a 502 Bad Gateway error while communicating with dhtc01:11434. This caused the ollama service on the cluster-lab-ollama instance running on dhtc-gpu (192.168.1.211) to become unreachable, impacting the overall functionality of the system.

How it was resolved: The issue self-resolved automatically when the compose-orchestration cluster's built-in health checks and self-healing mechanisms detected the problem and took corrective actions, restoring the demo-ollama-health endpoint to a stable state and making the ollama service accessible again.

Prevention:

  1. Implement more robust health-checks for the demo-ollama-health endpoint to proactively detect and alert on potential issues.
  2. Pin specific image tags for the compose-orchestration cluster components to prevent automatic updates from introducing new problems.
  3. Increase monitoring and logging verbosity for the ollama service to gather more detailed information about its behavior during future incidents.
  4. Regularly review and update the cluster's self-healing rules and thresholds to ensure they remain effective in handling various failure scenarios.