[Backport 2.x] Alerting Enhancements: Alerting Comments (Experimental) (#1561)

alerting/src/main/kotlin/org/opensearch/alerting/AlertService.kt

@@ -28,6 +28,7 @@ import org.opensearch.alerting.opensearchapi.suspendUntil
 import org.opensearch.alerting.script.ChainedAlertTriggerExecutionContext
 import org.opensearch.alerting.script.DocumentLevelTriggerExecutionContext
 import org.opensearch.alerting.script.QueryLevelTriggerExecutionContext
+import org.opensearch.alerting.util.CommentsUtils
 import org.opensearch.alerting.util.IndexUtils
 import org.opensearch.alerting.util.MAX_SEARCH_SIZE
 import org.opensearch.alerting.util.getBucketKeysHash
@@ -157,7 +158,7 @@ class AlertService(
         workflorwRunContext: WorkflowRunContext?
     ): Alert? {
         val currentTime = Instant.now()
-        val currentAlert = ctx.alert
+        val currentAlert = ctx.alertContext?.alert
 
         val updatedActionExecutionResults = mutableListOf<ActionExecutionResult>()
         val currentActionIds = mutableSetOf<String>()
@@ -686,6 +687,8 @@ class AlertService(
         val alertsIndex = dataSources.alertsIndex
         val alertsHistoryIndex = dataSources.alertsHistoryIndex
 
+        val commentIdsToDelete = mutableListOf<String>()
+
         var requestsToRetry = alerts.flatMap { alert ->
             // We don't want to set the version when saving alerts because the MonitorRunner has first priority when writing alerts.
             // In the rare event that a user acknowledges an alert between when it's read and when it's written
@@ -732,13 +735,22 @@ class AlertService(
                     listOfNotNull<DocWriteRequest<*>>(
                         DeleteRequest(alertsIndex, alert.id)
                             .routing(routingId),
-                        // Only add completed alert to history index if history is enabled
                         if (alertIndices.isAlertHistoryEnabled()) {
+                            // Only add completed alert to history index if history is enabled
                             IndexRequest(alertsHistoryIndex)
                                 .routing(routingId)
                                 .source(alert.toXContentWithUser(XContentFactory.jsonBuilder()))
                                 .id(alert.id)
-                        } else null
+                        } else {
+                            // Otherwise, prepare the Alert's comments for deletion, and don't include
+                            // a request to index the Alert to an Alert history index.
+                            // The delete request can't be added to the list of DocWriteRequests because
+                            // Comments are stored in aliased history indices, not a concrete Comments
+                            // index like Alerts. A DeleteBy request will be used to delete Comments, instead
+                            // of a regular Delete request
+                            commentIdsToDelete.addAll(CommentsUtils.getCommentIDsByAlertIDs(client, listOf(alert.id)))
+                            null
+                        }
                     )
                 }
             }
@@ -758,6 +770,9 @@ class AlertService(
                 throw ExceptionsHelper.convertToOpenSearchException(retryCause)
             }
         }
+
+        // delete all the comments of any Alerts that were deleted
+        CommentsUtils.deleteComments(client, commentIdsToDelete)
     }
 
     /**

alerting/src/main/kotlin/org/opensearch/alerting/AlertingPlugin.kt

@@ -16,6 +16,7 @@ import org.opensearch.alerting.action.GetRemoteIndexesAction
 import org.opensearch.alerting.action.SearchEmailAccountAction
 import org.opensearch.alerting.action.SearchEmailGroupAction
 import org.opensearch.alerting.alerts.AlertIndices
+import org.opensearch.alerting.comments.CommentsIndices
 import org.opensearch.alerting.core.JobSweeper
 import org.opensearch.alerting.core.ScheduledJobIndices
 import org.opensearch.alerting.core.action.node.ScheduledJobsStatsAction
@@ -27,6 +28,7 @@ import org.opensearch.alerting.core.settings.LegacyOpenDistroScheduledJobSetting
 import org.opensearch.alerting.core.settings.ScheduledJobSettings
 import org.opensearch.alerting.resthandler.RestAcknowledgeAlertAction
 import org.opensearch.alerting.resthandler.RestAcknowledgeChainedAlertAction
+import org.opensearch.alerting.resthandler.RestDeleteAlertingCommentAction
 import org.opensearch.alerting.resthandler.RestDeleteMonitorAction
 import org.opensearch.alerting.resthandler.RestDeleteWorkflowAction
 import org.opensearch.alerting.resthandler.RestExecuteMonitorAction
@@ -40,8 +42,10 @@ import org.opensearch.alerting.resthandler.RestGetMonitorAction
 import org.opensearch.alerting.resthandler.RestGetRemoteIndexesAction
 import org.opensearch.alerting.resthandler.RestGetWorkflowAction
 import org.opensearch.alerting.resthandler.RestGetWorkflowAlertsAction
+import org.opensearch.alerting.resthandler.RestIndexAlertingCommentAction
 import org.opensearch.alerting.resthandler.RestIndexMonitorAction
 import org.opensearch.alerting.resthandler.RestIndexWorkflowAction
+import org.opensearch.alerting.resthandler.RestSearchAlertingCommentAction
 import org.opensearch.alerting.resthandler.RestSearchEmailAccountAction
 import org.opensearch.alerting.resthandler.RestSearchEmailGroupAction
 import org.opensearch.alerting.resthandler.RestSearchMonitorAction
@@ -54,6 +58,7 @@ import org.opensearch.alerting.settings.LegacyOpenDistroAlertingSettings
 import org.opensearch.alerting.settings.LegacyOpenDistroDestinationSettings
 import org.opensearch.alerting.transport.TransportAcknowledgeAlertAction
 import org.opensearch.alerting.transport.TransportAcknowledgeChainedAlertAction
+import org.opensearch.alerting.transport.TransportDeleteAlertingCommentAction
 import org.opensearch.alerting.transport.TransportDeleteMonitorAction
 import org.opensearch.alerting.transport.TransportDeleteWorkflowAction
 import org.opensearch.alerting.transport.TransportDocLevelMonitorFanOutAction
@@ -68,8 +73,10 @@ import org.opensearch.alerting.transport.TransportGetMonitorAction
 import org.opensearch.alerting.transport.TransportGetRemoteIndexesAction
 import org.opensearch.alerting.transport.TransportGetWorkflowAction
 import org.opensearch.alerting.transport.TransportGetWorkflowAlertsAction
+import org.opensearch.alerting.transport.TransportIndexAlertingCommentAction
 import org.opensearch.alerting.transport.TransportIndexMonitorAction
 import org.opensearch.alerting.transport.TransportIndexWorkflowAction
+import org.opensearch.alerting.transport.TransportSearchAlertingCommentAction
 import org.opensearch.alerting.transport.TransportSearchEmailAccountAction
 import org.opensearch.alerting.transport.TransportSearchEmailGroupAction
 import org.opensearch.alerting.transport.TransportSearchMonitorAction
@@ -158,6 +165,7 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
         @JvmField val LEGACY_OPENDISTRO_EMAIL_GROUP_BASE_URI = "$LEGACY_OPENDISTRO_DESTINATION_BASE_URI/email_groups"
 
         @JvmField val FINDING_BASE_URI = "/_plugins/_alerting/findings"
+        @JvmField val COMMENTS_BASE_URI = "/_plugins/_alerting/comments"
 
         @JvmField val ALERTING_JOB_TYPES = listOf("monitor", "workflow")
     }
@@ -166,6 +174,7 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
     lateinit var scheduler: JobScheduler
     lateinit var sweeper: JobSweeper
     lateinit var scheduledJobIndices: ScheduledJobIndices
+    lateinit var commentsIndices: CommentsIndices
     lateinit var docLevelMonitorQueries: DocLevelMonitorQueries
     lateinit var threadPool: ThreadPool
     lateinit var alertIndices: AlertIndices
@@ -203,6 +212,9 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
             RestGetWorkflowAction(),
             RestDeleteWorkflowAction(),
             RestGetRemoteIndexesAction(),
+            RestIndexAlertingCommentAction(),
+            RestSearchAlertingCommentAction(),
+            RestDeleteAlertingCommentAction(),
         )
     }
 
@@ -229,6 +241,9 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
             ActionPlugin.ActionHandler(AlertingActions.INDEX_WORKFLOW_ACTION_TYPE, TransportIndexWorkflowAction::class.java),
             ActionPlugin.ActionHandler(AlertingActions.GET_WORKFLOW_ACTION_TYPE, TransportGetWorkflowAction::class.java),
             ActionPlugin.ActionHandler(AlertingActions.DELETE_WORKFLOW_ACTION_TYPE, TransportDeleteWorkflowAction::class.java),
+            ActionPlugin.ActionHandler(AlertingActions.INDEX_COMMENT_ACTION_TYPE, TransportIndexAlertingCommentAction::class.java),
+            ActionPlugin.ActionHandler(AlertingActions.SEARCH_COMMENTS_ACTION_TYPE, TransportSearchAlertingCommentAction::class.java),
+            ActionPlugin.ActionHandler(AlertingActions.DELETE_COMMENT_ACTION_TYPE, TransportDeleteAlertingCommentAction::class.java),
             ActionPlugin.ActionHandler(ExecuteWorkflowAction.INSTANCE, TransportExecuteWorkflowAction::class.java),
             ActionPlugin.ActionHandler(GetRemoteIndexesAction.INSTANCE, TransportGetRemoteIndexesAction::class.java),
             ActionPlugin.ActionHandler(DocLevelMonitorFanOutAction.INSTANCE, TransportDocLevelMonitorFanOutAction::class.java)
@@ -287,6 +302,7 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
             .registerConsumers()
             .registerDestinationSettings()
         scheduledJobIndices = ScheduledJobIndices(client.admin(), clusterService)
+        commentsIndices = CommentsIndices(environment.settings(), client, threadPool, clusterService)
         docLevelMonitorQueries = DocLevelMonitorQueries(client, clusterService)
         scheduler = JobScheduler(threadPool, runner)
         sweeper = JobSweeper(environment.settings(), client, clusterService, threadPool, xContentRegistry, scheduler, ALERTING_JOB_TYPES)
@@ -315,6 +331,7 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
             scheduler,
             runner,
             scheduledJobIndices,
+            commentsIndices,
             docLevelMonitorQueries,
             destinationMigrationCoordinator,
             lockService,
@@ -389,7 +406,15 @@ internal class AlertingPlugin : PainlessExtension, ActionPlugin, ScriptPlugin, R
             AlertingSettings.FINDING_HISTORY_ROLLOVER_PERIOD,
             AlertingSettings.FINDING_HISTORY_RETENTION_PERIOD,
             AlertingSettings.FINDINGS_INDEXING_BATCH_SIZE,
-            AlertingSettings.CROSS_CLUSTER_MONITORING_ENABLED
+            AlertingSettings.CROSS_CLUSTER_MONITORING_ENABLED,
+            AlertingSettings.ALERTING_COMMENTS_ENABLED,
+            AlertingSettings.COMMENTS_HISTORY_MAX_DOCS,
+            AlertingSettings.COMMENTS_HISTORY_INDEX_MAX_AGE,
+            AlertingSettings.COMMENTS_HISTORY_ROLLOVER_PERIOD,
+            AlertingSettings.COMMENTS_HISTORY_RETENTION_PERIOD,
+            AlertingSettings.COMMENTS_MAX_CONTENT_SIZE,
+            AlertingSettings.MAX_COMMENTS_PER_ALERT,
+            AlertingSettings.MAX_COMMENTS_PER_NOTIFICATION
         )
     }
 

alerting/src/main/kotlin/org/opensearch/alerting/BucketLevelMonitorRunner.kt

@@ -23,6 +23,8 @@ import org.opensearch.alerting.opensearchapi.retry
 import org.opensearch.alerting.opensearchapi.suspendUntil
 import org.opensearch.alerting.opensearchapi.withClosableContext
 import org.opensearch.alerting.script.BucketLevelTriggerExecutionContext
+import org.opensearch.alerting.settings.AlertingSettings
+import org.opensearch.alerting.util.CommentsUtils
 import org.opensearch.alerting.util.defaultToPerExecutionAction
 import org.opensearch.alerting.util.getActionExecutionPolicy
 import org.opensearch.alerting.util.getBucketKeysHash
@@ -36,6 +38,7 @@ import org.opensearch.common.xcontent.LoggingDeprecationHandler
 import org.opensearch.common.xcontent.XContentType
 import org.opensearch.commons.alerting.model.Alert
 import org.opensearch.commons.alerting.model.BucketLevelTrigger
+import org.opensearch.commons.alerting.model.Comment
 import org.opensearch.commons.alerting.model.Finding
 import org.opensearch.commons.alerting.model.Monitor
 import org.opensearch.commons.alerting.model.SearchInput
@@ -274,6 +277,9 @@ object BucketLevelMonitorRunner : MonitorRunner() {
             // to alertsToUpdate to ensure the Alert doc is updated at the end in either case
             completedAlertsToUpdate.addAll(completedAlerts)
 
+            // retrieve max Comments per Alert notification setting
+            val maxComments = monitorCtx.clusterService!!.clusterSettings.get(AlertingSettings.MAX_COMMENTS_PER_NOTIFICATION)
+
             // All trigger contexts and results should be available at this point since all triggers were evaluated in the main do-while loop
             val triggerCtx = triggerContexts[trigger.id]!!
             val triggerResult = triggerResults[trigger.id]!!
@@ -291,9 +297,18 @@ object BucketLevelMonitorRunner : MonitorRunner() {
                 if (actionExecutionScope is PerAlertActionScope && !shouldDefaultToPerExecution) {
                     for (alertCategory in actionExecutionScope.actionableAlerts) {
                         val alertsToExecuteActionsFor = nextAlerts[trigger.id]?.get(alertCategory) ?: mutableListOf()
+                        val alertsToExecuteActionsForIds = alertsToExecuteActionsFor.map { it.id }
+                        val allAlertsComments = CommentsUtils.getCommentsForAlertNotification(
+                            monitorCtx.client!!,
+                            alertsToExecuteActionsForIds,
+                            maxComments
+                        )
                         for (alert in alertsToExecuteActionsFor) {
-                            val alertContext = if (alertCategory != AlertCategory.NEW) AlertContext(alert = alert)
-                            else getAlertContext(alert = alert, alertSampleDocs = alertSampleDocs)
+                            val alertContext = if (alertCategory != AlertCategory.NEW) {
+                                AlertContext(alert = alert, comments = allAlertsComments[alert.id])
+                            } else {
+                                getAlertContext(alert = alert, alertSampleDocs = alertSampleDocs, allAlertsComments[alert.id])
+                            }
 
                             val actionCtx = getActionContextForAlertCategory(
                                 alertCategory,
@@ -329,12 +344,28 @@ object BucketLevelMonitorRunner : MonitorRunner() {
                         continue
                     }
 
+                    val alertsToExecuteActionsForIds = dedupedAlerts.map { it.id }
+                        .plus(newAlerts.map { it.id })
+                        .plus(completedAlerts.map { it.id })
+                    val allAlertsComments = CommentsUtils.getCommentsForAlertNotification(
+                        monitorCtx.client!!,
+                        alertsToExecuteActionsForIds,
+                        maxComments
+                    )
                     val actionCtx = triggerCtx.copy(
-                        dedupedAlerts = dedupedAlerts,
+                        dedupedAlerts = dedupedAlerts.map {
+                            AlertContext(alert = it, comments = allAlertsComments[it.id])
+                        },
                         newAlerts = newAlerts.map {
-                            getAlertContext(alert = it, alertSampleDocs = alertSampleDocs)
+                            getAlertContext(
+                                alert = it,
+                                alertSampleDocs = alertSampleDocs,
+                                alertComments = allAlertsComments[it.id]
+                            )
+                        },
+                        completedAlerts = completedAlerts.map {
+                            AlertContext(alert = it, comments = allAlertsComments[it.id])
                         },
-                        completedAlerts = completedAlerts,
                         error = monitorResult.error ?: triggerResult.error
                     )
                     val actionResult = this.runAction(action, actionCtx, monitorCtx, monitor, dryrun)
@@ -537,17 +568,18 @@ object BucketLevelMonitorRunner : MonitorRunner() {
     ): BucketLevelTriggerExecutionContext {
         return when (alertCategory) {
             AlertCategory.DEDUPED ->
-                ctx.copy(dedupedAlerts = listOf(alertContext.alert), newAlerts = emptyList(), completedAlerts = emptyList(), error = error)
+                ctx.copy(dedupedAlerts = listOf(alertContext), newAlerts = emptyList(), completedAlerts = emptyList(), error = error)
             AlertCategory.NEW ->
                 ctx.copy(dedupedAlerts = emptyList(), newAlerts = listOf(alertContext), completedAlerts = emptyList(), error = error)
             AlertCategory.COMPLETED ->
-                ctx.copy(dedupedAlerts = emptyList(), newAlerts = emptyList(), completedAlerts = listOf(alertContext.alert), error = error)
+                ctx.copy(dedupedAlerts = emptyList(), newAlerts = emptyList(), completedAlerts = listOf(alertContext), error = error)
         }
     }
 
     private fun getAlertContext(
         alert: Alert,
-        alertSampleDocs: Map<String, Map<String, List<Map<String, Any>>>>
+        alertSampleDocs: Map<String, Map<String, List<Map<String, Any>>>>,
+        alertComments: List<Comment>?
     ): AlertContext {
         val bucketKey = alert.aggregationResultBucket?.getBucketKeysHash()
         val sampleDocs = alertSampleDocs[alert.triggerId]?.get(bucketKey)
@@ -561,7 +593,7 @@ object BucketLevelMonitorRunner : MonitorRunner() {
                 alert.monitorId,
                 alert.executionId
             )
-            AlertContext(alert = alert, sampleDocs = listOf())
+            AlertContext(alert = alert, sampleDocs = listOf(), comments = alertComments)
         }
     }
 

alerting/src/main/kotlin/org/opensearch/alerting/MonitorRunner.kt

@@ -55,7 +55,7 @@ abstract class MonitorRunner {
         dryrun: Boolean
     ): ActionRunResult {
         return try {
-            if (ctx is QueryLevelTriggerExecutionContext && !MonitorRunnerService.isActionActionable(action, ctx.alert)) {
+            if (ctx is QueryLevelTriggerExecutionContext && !MonitorRunnerService.isActionActionable(action, ctx.alertContext?.alert)) {
                 return ActionRunResult(action.id, action.name, mapOf(), true, null, null)
             }
             val actionOutput = mutableMapOf<String, String>()