[8.15](backport #41469) [azure-eventhub] Update input v1 status on start, failure, and stop (#41545)

* [azure-eventhub] Update input v1 status on start, failure, and stop (#41469)

Update the Elastic Agent status by calling `inputContext.UpdateStatus(status.Failed, err.Error())` during the main input lifecycle phases (set up and run). If any setup, startup, and run steps fail, the input reports the fatal issue before shutting down.

Without reporting the fatal error, the input logs the error and stops, but users continue to see it as "healthy" in Fleet, causing confusion and making troubleshooting much harder.

(cherry picked from commit 882c854)

* Drop unintentional changelog entries

---------

Co-authored-by: Maurizio Branca <[email protected]>

Author: mergify[bot]

CHANGELOG.next.asciidoc

@@ -102,6 +102,7 @@ https://github.com/elastic/beats/compare/v8.8.1\...main[Check the HEAD diff]
 - Log bad handshake details when websocket connection fails {pull}41300[41300]
 - Improve modification time handling for entities and entity deletion logic in the Active Directory entityanalytics input. {pull}41179[41179]
 - Fix double encoding of client_secret in the Entity Analytics input's Azure Active Directory provider {pull}41393[41393]
+- The azure-eventhub input now correctly reports its status to the Elastic Agent on fatal errors {pull}41469[41469]
 
 *Heartbeat*
 

x-pack/filebeat/input/azureeventhub/v1_input.go

@@ -23,6 +23,7 @@ import (
 	v2 "github.com/elastic/beats/v7/filebeat/input/v2"
 	"github.com/elastic/beats/v7/libbeat/beat"
 	"github.com/elastic/beats/v7/libbeat/common/acker"
+	"github.com/elastic/beats/v7/libbeat/management/status"
 	"github.com/elastic/elastic-agent-libs/logp"
 	"github.com/elastic/elastic-agent-libs/mapstr"
 )
@@ -68,9 +69,13 @@ func (in *eventHubInputV1) Run(
 ) error {
 	var err error
 
+	// Update the status to starting
+	inputContext.UpdateStatus(status.Starting, "")
+
 	// Create pipelineClient for publishing events.
 	in.pipelineClient, err = createPipelineClient(pipeline)
 	if err != nil {
+		inputContext.UpdateStatus(status.Failed, err.Error())
 		return fmt.Errorf("failed to create pipeline pipelineClient: %w", err)
 	}
 	defer in.pipelineClient.Close()
@@ -82,6 +87,7 @@ func (in *eventHubInputV1) Run(
 	// Set up new and legacy sanitizers, if any.
 	sanitizers, err := newSanitizers(in.config.Sanitizers, in.config.LegacySanitizeOptions)
 	if err != nil {
+		inputContext.UpdateStatus(status.Failed, err.Error())
 		return fmt.Errorf("failed to create sanitizers: %w", err)
 	}
 
@@ -98,16 +104,20 @@ func (in *eventHubInputV1) Run(
 	// in preparation for the main run loop.
 	err = in.setup(ctx)
 	if err != nil {
+		in.log.Errorw("error setting up input", "error", err)
+		inputContext.UpdateStatus(status.Failed, err.Error())
 		return err
 	}
 
 	// Start the main run loop
 	err = in.run(ctx)
 	if err != nil {
 		in.log.Errorw("error running input", "error", err)
+		inputContext.UpdateStatus(status.Failed, err.Error())
 		return err
 	}
 
+	inputContext.UpdateStatus(status.Stopping, "")
 	return nil
 }