[receiver/k8scluster] add k8s.container.status.last_terminated_reason…

… resource attribute (open-telemetry#31505)

**Description:** 
Add k8s.container.status.last_terminated_reason resource attribute

**Link to tracking Issue:** open-telemetry#31282

.chloggen/main-resource-attribute.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: k8sclusterreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "add optional status_last_terminated_reason resource attribute"
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [31282]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

receiver/k8sclusterreceiver/documentation.md

@@ -428,6 +428,7 @@ Current status reason of the pod (1 - Evicted, 2 - NodeAffinity, 3 - NodeLost, 4
 | container.runtime | The container runtime used by Kubernetes Node. | Any Str | false |
 | container.runtime.version | The version of container runtime used by Kubernetes Node. | Any Str | false |
 | k8s.container.name | The k8s container name | Any Str | true |
+| k8s.container.status.last_terminated_reason | Last terminated reason of a container. | Any Str | false |
 | k8s.cronjob.name | The k8s CronJob name | Any Str | true |
 | k8s.cronjob.uid | The k8s CronJob uid. | Any Str | true |
 | k8s.daemonset.name | The k8s daemonset name. | Any Str | true |

receiver/k8sclusterreceiver/internal/container/containers.go

@@ -60,6 +60,8 @@ func RecordSpecMetrics(logger *zap.Logger, mb *imetadata.MetricsBuilder, c corev
 			logger.Debug("unsupported request type", zap.Any("type", k))
 		}
 	}
+
+	rb := mb.NewResourceBuilder()
 	var containerID string
 	var imageStr string
 	for _, cs := range pod.Status.ContainerStatuses {
@@ -68,11 +70,13 @@ func RecordSpecMetrics(logger *zap.Logger, mb *imetadata.MetricsBuilder, c corev
 			imageStr = cs.Image
 			mb.RecordK8sContainerRestartsDataPoint(ts, int64(cs.RestartCount))
 			mb.RecordK8sContainerReadyDataPoint(ts, boolToInt64(cs.Ready))
+			if cs.LastTerminationState.Terminated != nil {
+				rb.SetK8sContainerStatusLastTerminatedReason(cs.LastTerminationState.Terminated.Reason)
+			}
 			break
 		}
 	}
 
-	rb := mb.NewResourceBuilder()
 	rb.SetK8sPodUID(string(pod.UID))
 	rb.SetK8sPodName(pod.Name)
 	rb.SetK8sNodeName(pod.Spec.NodeName)