[Elastic Agent]-PR- Introduce log message for not supported annotations for Hints based autodiscover

changelog/fragments/1709656001-logshints.yaml

@@ -0,0 +1,32 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: enhancement
+
+# Change summary; a 80ish characters long description of the change.
+summary: Introduce log message for not supported annotations for Hints based autodiscover
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+#description:
+
+# Affected component; usually one of "elastic-agent", "fleet-server", "filebeat", "metricbeat", "auditbeat", "all", etc.
+component: elastic-agent
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+pr: https://github.com/elastic/elastic-agent/pull/4360
+
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+issue: https://github.com/elastic/elastic-agent/issues/3064

internal/pkg/composable/providers/kubernetes/hints.go

@@ -30,6 +30,8 @@ const (
 	processors  = "processors"
 )
 
+var allSupportedHints = []string{"enabled", integration, datastreams, host, period, timeout, metricspath, username, password, stream, processors}
+
 type hintsBuilder struct {
 	Key string
 
@@ -288,7 +290,7 @@ func GetHintsMapping(k8sMapping map[string]interface{}, logger *logp.Logger, pre
 		}
 	}
 
-	hintsExtracted := utils.GenerateHints(annotations, cName, prefix)
+	hintsExtracted, _ := utils.GenerateHints(annotations, cName, prefix, allSupportedHints)
 	if len(hintsExtracted) == 0 {
 		return hintData
 	}

internal/pkg/composable/providers/kubernetes/pod.go

@@ -212,7 +212,12 @@ func (p *pod) emitRunning(pod *kubernetes.Pod) {
 		if !p.managed {
 			if ann, ok := data.mapping["annotations"]; ok {
 				annotations, _ := ann.(mapstr.M)
-				hints := utils.GenerateHints(annotations, "", p.config.Prefix)
+				//We check whether the provided annotation follows the supported format and vocabulary. The check happens for annotations that start with co.elastic.hints
+				hints, err := utils.GenerateHints(annotations, "", p.config.Prefix, allSupportedHints)
+				if err != nil {
+					p.logger.Warnf("%v for pod %v in namespace", err, pod.Name, pod.ObjectMeta.Namespace)
+				}
+
 				if len(hints) > 0 {
 					p.logger.Debugf("Extracted hints are :%v", hints)
 					hintsMapping := GenerateHintsMapping(hints, data.mapping, p.logger, "")