Prevent mapping explosion on logs (#4181)

This commit remove some JSON objects that were added to the logs, thus
preventing mapping explosion when those logs are ingested into
Elasticsearch.

Some entries are converted to strings, others are fully removed to keep
the log within a reasonable size and some are kept as string at trace level.

(cherry picked from commit 8ff01e3)

internal/pkg/api/handleCheckin.go

@@ -999,14 +999,13 @@ func parseComponents(zlog zerolog.Logger, agent *model.Agent, req *CheckinReques
 	// Compare the deserialized meta structures and return the bytes to update if different
 	if !reflect.DeepEqual(reqComponents, agent.Components) {
 
+		reqComponentsJSON, _ := json.Marshal(*req.Components)
 		zlog.Trace().
-			RawJSON("oldComponents", agentComponentsJSON).
-			RawJSON("newComponents", *req.Components).
+			Str("oldComponents", string(agentComponentsJSON)).
+			Str("req.Components", string(reqComponentsJSON)).
 			Msg("local components data is not equal")
 
-		zlog.Info().
-			RawJSON("req.Components", *req.Components).
-			Msg("applying new components data")
+		zlog.Info().Msg("applying new components data")
 
 		outComponents = *req.Components
 		compUnhealthyReason := calcUnhealthyReason(reqComponents)

internal/pkg/server/fleet.go

@@ -251,25 +251,17 @@ func configCacheChanged(curCfg, newCfg *config.Config) bool {
 	return curCfg.Inputs[0].Cache != newCfg.Inputs[0].Cache
 }
 
-func configChangedServer(log zerolog.Logger, curCfg, newCfg *config.Config) bool {
-	zlog := log.With().Interface("new", newCfg.Redact()).Logger()
-
+func configChangedServer(zlog zerolog.Logger, curCfg, newCfg *config.Config) bool {
 	changed := true
 	switch {
 	case curCfg == nil:
 		zlog.Info().Msg("initial server configuration")
 	case !reflect.DeepEqual(curCfg.Fleet.CopyNoLogging(), newCfg.Fleet.CopyNoLogging()):
-		zlog.Info().
-			Interface("old", curCfg.Redact()).
-			Msg("fleet configuration has changed")
+		zlog.Info().Msg("fleet configuration has changed")
 	case !reflect.DeepEqual(curCfg.Output, newCfg.Output):
-		zlog.Info().
-			Interface("old", curCfg.Redact()).
-			Msg("output configuration has changed")
+		zlog.Info().Msg("output configuration has changed")
 	case !reflect.DeepEqual(curCfg.Inputs[0].Server, newCfg.Inputs[0].Server):
-		zlog.Info().
-			Interface("old", curCfg.Redact()).
-			Msg("server configuration has changed")
+		zlog.Info().Msg("server configuration has changed")
 	default:
 		changed = false
 	}