Improve observability around config sync

[lahabana]

Is there an existing issue for this?

• I have searched the existing issues

Does this enhancement require public documentation?

• I have added an Acceptance Criteria item for adding and/or adjusting public documentation (if applicable)

Problem Statement

There are metrics to see how long sync takes: https://docs.konghq.com/kubernetes-ingress-controller/latest/production/observability/prometheus/#ingress_controller_configuration_push_duration_milliseconds

A user is suggesting adding this to logs.

kubernetes-ingress-controller/internal/dataplane/sendconfig/sendconfig.go

Line 104 in 95af584

logger.V(util.InfoLevel).Info("Successfully synced configuration to Konnect")

Is this something we want to do?

Proposed Solution

No response

Additional information

No response

Acceptance Criteria

• Potentially log duration

Tasks

Beta Give feedback

1. Log duration of sending configuration to gateway or Konnect #6362
   area/observability +1
   
2. Add metrics about duration of translating Kong configuration #6363
   area/observability +1
   

[mheap]

The request is a little more involved. They'd like timings for each phase e.g.

• Fetch from k8s API server
• Translate to Kong format
• Sync with Konnect

[lahabana]

This looks a lot like tracing to me but tracing without an originator is a little unusual.

[lahabana]

Let's go for logs as a first step we can always improve later

[tao12345666333]

I have previously attempted to add tracing support for KIC (for performance testing purposes).

previously proposal here: https://docs.google.com/document/d/1iSWDjODhupV-1GxIBCsDcXbyrAyMghl2zg9wKXMPRVU/edit?usp=sharing

Example