charm-refresh
Source code

charm-refresh

    • Add in-place refreshes to a charm
      • 1. Is this for you?
      • 2. Glossary
      • 3. What happens after juju refresh
      • 4. Product requirements
      • 5. Backwards compatibility consequences
      • 6. Public interface
      • 7. Add charm-refresh
      • 8. Update config.yaml
      • 9. Update metadata.yaml
      • 10. Update actions.yaml
      • 11. Create refresh_versions.toml
        • Kubernetes
        • Machines
      • 12. Configure log format
      • 13. Increase httpx logger level
      • 14. Remove set_workload_version calls
      • 15. Set up charm compatibility version
      • Difficulty increase
      • 16. Subclass CharmSpecific
        • Kubernetes and machines
        • Kubernetes only
        • Machines only
      • 17. Implement is_compatible
      • 18. Instantiate refresh class
        • Kubernetes
        • Machines
      • 19. Handle PeerRelationNotReady
      • 20. Handle UnitTearingDown
      • 21. Handle KubernetesJujuAppNotTrusted
      • 22. Add CharmSpecific fields
      • 23. Check workload_allowed_to_start
      • 24. Implement refresh_snap
      • 25. Allow next unit to refresh
      • 26. Check in_progress
      • 27. Set status
      • 28. Remove duplicate hardcoded snap info
      • 29. Implement pre-refresh checks
      • 30. Move instantiation of refresh class
      • 31. Set up URL redirect to user docs
    • Known limitations
    • Contact us
    • Reference
      • Glossary
      • What happens after juju refresh
      • Product requirements
      • User experience
        • Config options
        • Statuses
        • Actions
charm-refresh 3.1.0
  • charm-refresh
    • 3.1.0
    • 3.0.0
  • charm-refresh
  • Add in-place refreshes to a charm
  • 30. Move instantiation of refresh class
3.1.0 3.0.0
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30. Move instantiation of refresh class

After following 24. Implement refresh_snap and 29. Implement pre-refresh checks, the instantiation of charm_refresh.Kubernetes or charm_refresh.Machines may need to be moved so that everything referenced in your CharmSpecific callbacks is defined.

Instructions:

  • Kubernetes

  • Machines

29. Implement pre-refresh checks 31. Set up URL redirect to user docs