The goal of this roadmap item is to deprecate cilium monitor in favor of Hubble.

Steps:

• Identify notifications and fields absent in Hubble but available via Cilium Monitor. Expose them via the Hubble gRPC API:
  • Perf RecordLost events
  • AgentNotify events
  • DebugMsg events
  • MessageTypeCapture events
  • TraceNotify fields
    • Hash
    • IfIndex
    • Reason (ConnState)
  • DropNotify fields
    • Hash
  • Expose raw datapath payload access for debugging
  • (identify remaining) ...
• Replace all remaining uses of Cilium Monitor in CI with Hubble
  • CI/Hubble: Test that TraceNotify events are stored as expected #11362
  • (identify remaining) ...
• (optional): Have a compatibility shim where we implement the cilium monitor output format on top of the Hubble gRPC API (this e.g. removes client-side packet dissecting)