V1.12.0 rc3 (#4933)

* fix(loki.source.podlogs): set validation scheme (#4931)

* set validation scheme

* database_observability: mark mysql component as public preview (#4919)

Followup of #4763

* fix changelog

* database_observability: log explain plan fetch error at debug (#4935)

In case of sql syntax error, this message is logged repeatedly and
there's no actionable outcome. Downgrade to debug level to reduce noise.

---------

Co-authored-by: Cristian Greco <[email protected]>

Author: kalleep

CHANGELOG.md

@@ -10,7 +10,7 @@ internal API changes are not present.
 Main (unreleased)
 -----------------
 
-v1.12.0-rc.2
+v1.12.0-rc.3
 -----------------
 
 ### Breaking changes

internal/component/database_observability/mysql/collector/explain_plans.go

@@ -457,7 +457,7 @@ func (c *ExplainPlans) Name() string {
 }
 
 func (c *ExplainPlans) Start(ctx context.Context) error {
-	level.Info(c.logger).Log("msg", "collector started")
+	level.Debug(c.logger).Log("msg", "collector started")
 
 	c.running.Store(true)
 	ctx, cancel := context.WithCancel(ctx)
@@ -585,7 +585,7 @@ func (c *ExplainPlans) fetchExplainPlans(ctx context.Context) error {
 
 		byteExplainPlanJSON, err := c.fetchExplainPlanJSON(ctx, *qi)
 		if err != nil {
-			level.Error(logger).Log("msg", "failed to fetch explain plan json bytes", "err", err)
+			level.Debug(logger).Log("msg", "failed to fetch explain plan json bytes", "err", err)
 			for _, code := range unrecoverableSQLCodes {
 				if strings.Contains(err.Error(), fmt.Sprintf("Error %s", code)) {
 					nonRecoverableFailureOccurred = true

internal/component/database_observability/mysql/component.go

@@ -39,7 +39,7 @@ const selectServerInfo = `SELECT @@server_uuid, VERSION()`
 func init() {
 	component.Register(component.Registration{
 		Name:      name,
-		Stability: featuregate.StabilityExperimental,
+		Stability: featuregate.StabilityPublicPreview,
 		Args:      Arguments{},
 		Exports:   Exports{},
 

internal/component/database_observability/postgres/collector/explain_plan.go

@@ -271,7 +271,7 @@ func (c *ExplainPlan) Name() string {
 }
 
 func (c *ExplainPlan) Start(ctx context.Context) error {
-	level.Info(c.logger).Log("msg", "collector started")
+	level.Debug(c.logger).Log("msg", "collector started")
 
 	c.running.Store(true)
 	ctx, cancel := context.WithCancel(ctx)
@@ -424,7 +424,7 @@ func (c *ExplainPlan) fetchExplainPlans(ctx context.Context) error {
 
 		byteExplainPlanJSON, err := c.fetchExplainPlanJSON(ctx, *qi)
 		if err != nil {
-			level.Error(logger).Log("msg", "failed to fetch explain plan json bytes", "err", err)
+			level.Debug(logger).Log("msg", "failed to fetch explain plan json bytes", "err", err)
 			for _, code := range unrecoverablePostgresSQLErrors {
 				if strings.Contains(err.Error(), code) {
 					nonRecoverableFailureOccurred = true

internal/component/loki/source/podlogs/relabel.go

@@ -39,6 +39,9 @@ func convertRelabelConfig(in []*promv1.RelabelConfig) ([]*relabel.Config, error)
 			outRule.Action = relabel.Action(strings.ToLower(inRule.Action))
 		}
 
+		// TODO: add support for choosing validation scheme: https://github.com/grafana/alloy/issues/4122
+		outRule.NameValidationScheme = model.LegacyValidation
+
 		res = append(res, &outRule)
 	}