K8s

• Kubernetes Attributes
• Deprecated Kubernetes Attributes

Kubernetes Attributes

Kubernetes resource attributes.

Attribute	Type	Description	Examples	Stability
k8s.cluster.name	string	The name of the cluster.	opentelemetry-cluster
k8s.cluster.uid	string	A pseudo-ID for the cluster, set to the UID of the kube-system namespace. [1]	218fc5a9-a5f1-4b54-aa05-46717d0ab26d
k8s.container.name	string	The name of the Container from Pod specification, must be unique within a Pod. Container runtime usually uses different globally unique name (container.name).	redis
k8s.container.restart_count	int	Number of times the container was restarted. This attribute can be used to identify a particular container (running or stopped) within a container spec.
k8s.container.status.last_terminated_reason	string	Last terminated reason of the Container.	Evicted; Error
k8s.cronjob.name	string	The name of the CronJob.	opentelemetry
k8s.cronjob.uid	string	The UID of the CronJob.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff
k8s.daemonset.name	string	The name of the DaemonSet.	opentelemetry
k8s.daemonset.uid	string	The UID of the DaemonSet.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff
k8s.deployment.name	string	The name of the Deployment.	opentelemetry
k8s.deployment.uid	string	The UID of the Deployment.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff
k8s.job.name	string	The name of the Job.	opentelemetry
k8s.job.uid	string	The UID of the Job.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff
k8s.namespace.name	string	The name of the namespace that the pod is running in.	default
k8s.node.name	string	The name of the Node.	node-1
k8s.node.uid	string	The UID of the Node.	1eb3a0c6-0477-4080-a9cb-0cb7db65c6a2
k8s.pod.annotation.<key>	string	The annotation key-value pairs placed on the Pod, the <key> being the annotation name, the value being the annotation value.	k8s.pod.annotation.kubernetes.io/enforce-mountable-secrets=true; k8s.pod.annotation.mycompany.io/arch=x64; k8s.pod.annotation.data=
k8s.pod.label.<key>	string	The label key-value pairs placed on the Pod, the <key> being the label name, the value being the label value.	k8s.pod.label.app=my-app; k8s.pod.label.mycompany.io/arch=x64; k8s.pod.label.data=
k8s.pod.name	string	The name of the Pod.	opentelemetry-pod-autoconf
k8s.pod.uid	string	The UID of the Pod.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff
k8s.replicaset.name	string	The name of the ReplicaSet.	opentelemetry
k8s.replicaset.uid	string	The UID of the ReplicaSet.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff
k8s.statefulset.name	string	The name of the StatefulSet.	opentelemetry
k8s.statefulset.uid	string	The UID of the StatefulSet.	275ecb36-5aa8-4c2a-9c47-d8bb681b9aff

[1]: K8s doesn’t have support for obtaining a cluster ID. If this is ever added, we will recommend collecting the k8s.cluster.uid through the official APIs. In the meantime, we are able to use the uid of the kube-system namespace as a proxy for cluster ID. Read on for the rationale.

Every object created in a K8s cluster is assigned a distinct UID. The kube-system namespace is used by Kubernetes itself and will exist for the lifetime of the cluster. Using the uid of the kube-system namespace is a reasonable proxy for the K8s ClusterID as it will only change if the cluster is rebuilt. Furthermore, Kubernetes UIDs are UUIDs as standardized by ISO/IEC 9834-8 and ITU-T X.667. Which states:

If generated according to one of the mechanisms defined in Rec. ITU-T X.667 | ISO/IEC 9834-8, a UUID is either guaranteed to be different from all other UUIDs generated before 3603 A.D., or is extremely likely to be different (depending on the mechanism chosen).

Therefore, UIDs between clusters should be extremely unlikely to conflict.

Deprecated Kubernetes Attributes

Describes deprecated k8s attributes.

Attribute	Type	Description	Examples	Stability
k8s.pod.labels.<key>	string	Deprecated, use k8s.pod.label instead.	k8s.pod.label.app=my-app	Replaced by k8s.pod.label.