fix(source/wrappers/events): events not triggered under certain conditions

[ivankatliarchuk]

What does it do ?

• Add debug logs for wrappers EventHanders + Endpoints. To simplify debugging
• Add a temp config AddSourceWrapper to capture which wrappers enabled/disabled under certain conditions
• For each wrapper add tests for event handlers
• Added docs to provide a description about wrappers

follow-up

• review/design wrappers to simplify testing, as currently logic is coupled in controller and easy to make a mistake
• nat64 improve logic, disable when not enabled, build prefix list only once, not on every endpoint run

  external-dns/source/wrappers/nat64source.go

  Lines 41 to 52 in 8703fd4

  	parsedNAT64Prefixes := make([]netip.Prefix, 0)
  	for _, prefix := range s.nat64Prefixes {
  	pPrefix, err := netip.ParsePrefix(prefix)
  	if err != nil {
  	return nil, err
  	}
  	if pPrefix.Bits() != 96 {
  	return nil, fmt.Errorf("NAT64 prefixes need to be /96 prefixes")
  	}
  	parsedNAT64Prefixes = append(parsedNAT64Prefixes, pPrefix)
  	}

Motivation

Fixes #5680

More

• Yes, this PR title follows Conventional Commits
• Yes, I added unit tests
• Yes, I updated end user documentation accordingly

Tested

Case target filter disabled (not enabled)

go run main.go \
    --provider=aws \
    --registry=txt \
    --source=service \
    --interval=20m \
    --log-level=debug \
    --events \
    --listen-endpoint-events \
    --min-event-sync-interval=10s

Results (target net filter disabled while events working without issues)

Case target filter enabled

go run main.go \
    --provider=aws \
    --registry=txt \
    --source=service \
    --interval=20m \
    --log-level=debug \
    --events \
    --listen-endpoint-events \
    --min-event-sync-interval=10s \
    --target-net-filter=192.168.0.0/16

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[ivankatliarchuk]

Hi @redbaron when have pls have a look