Metrics

Karpenter makes several metrics available in Prometheus format to allow monitoring cluster provisioning status. These metrics are available by default at karpenter.karpenter.svc.cluster.local:8080/metrics configurable via the METRICS_PORT environment variable documented here

karpenter_build_info

A metric with a constant ‘1’ value labeled by version from which karpenter was built.

• Stability Level: STABLE

Nodeclaims Metrics

karpenter_nodeclaims_termination_duration_seconds

Duration of NodeClaim termination in seconds.

• Stability Level: BETA

karpenter_nodeclaims_terminated_total

Number of nodeclaims terminated in total by Karpenter. Labeled by the owning nodepool.

• Stability Level: STABLE

karpenter_nodeclaims_instance_termination_duration_seconds

Duration of CloudProvider Instance termination in seconds.

• Stability Level: BETA

karpenter_nodeclaims_disrupted_total

Number of nodeclaims disrupted in total by Karpenter. Labeled by reason the nodeclaim was disrupted and the owning nodepool.

• Stability Level: ALPHA

karpenter_nodeclaims_created_total

Number of nodeclaims created in total by Karpenter. Labeled by reason the nodeclaim was created and the owning nodepool.

• Stability Level: STABLE

Nodes Metrics

karpenter_nodes_total_pod_requests

Node total pod requests are the resources requested by pods bound to nodes, including the DaemonSet pods.

• Stability Level: BETA

karpenter_nodes_total_pod_limits

Node total pod limits are the resources specified by pod limits, including the DaemonSet pods.

• Stability Level: BETA

karpenter_nodes_total_daemon_requests

Node total daemon requests are the resource requested by DaemonSet pods bound to nodes.

• Stability Level: BETA

karpenter_nodes_total_daemon_limits

Node total daemon limits are the resources specified by DaemonSet pod limits.

• Stability Level: BETA

karpenter_nodes_termination_duration_seconds

The time taken between a node’s deletion request and the removal of its finalizer

• Stability Level: BETA

karpenter_nodes_terminated_total

Number of nodes terminated in total by Karpenter. Labeled by owning nodepool.

• Stability Level: STABLE

karpenter_nodes_system_overhead

Node system daemon overhead are the resources reserved for system overhead, the difference between the node’s capacity and allocatable values are reported by the status.

• Stability Level: BETA

karpenter_nodes_leases_deleted_total

Number of deleted leaked leases.

• Stability Level: ALPHA

karpenter_nodes_created_total

Number of nodes created in total by Karpenter. Labeled by owning nodepool.

• Stability Level: STABLE

karpenter_nodes_allocatable

Node allocatable are the resources allocatable by nodes.

• Stability Level: BETA

Pods Metrics

karpenter_pods_state

Pod state is the current state of pods. This metric can be used several ways as it is labeled by the pod name, namespace, owner, node, nodepool name, zone, architecture, capacity type, instance type and pod phase.

• Stability Level: BETA

karpenter_pods_startup_duration_seconds

The time from pod creation until the pod is running.

• Stability Level: STABLE

Voluntary Disruption Metrics

karpenter_voluntary_disruption_queue_failures_total

The number of times that an enqueued disruption decision failed. Labeled by disruption method.

• Stability Level: BETA

karpenter_voluntary_disruption_eligible_nodes

Number of nodes eligible for disruption by Karpenter. Labeled by disruption reason.

• Stability Level: BETA

karpenter_voluntary_disruption_decisions_total

Number of disruption decisions performed. Labeled by disruption decision, reason, and consolidation type.

• Stability Level: STABLE

karpenter_voluntary_disruption_decision_evaluation_duration_seconds

Duration of the disruption decision evaluation process in seconds. Labeled by method and consolidation type.

• Stability Level: BETA

karpenter_voluntary_disruption_consolidation_timeouts_total

Number of times the Consolidation algorithm has reached a timeout. Labeled by consolidation type.

• Stability Level: BETA

Scheduler Metrics

karpenter_scheduler_scheduling_duration_seconds

Duration of scheduling simulations used for deprovisioning and provisioning in seconds.

• Stability Level: STABLE

karpenter_scheduler_queue_depth

The number of pods currently waiting to be scheduled.

• Stability Level: BETA

Nodepools Metrics

karpenter_nodepools_usage

The amount of resources that have been provisioned for a nodepool. Labeled by nodepool name and resource type.

• Stability Level: ALPHA

karpenter_nodepools_limit

Limits specified on the nodepool that restrict the quantity of resources provisioned. Labeled by nodepool name and resource type.

• Stability Level: ALPHA

karpenter_nodepools_allowed_disruptions

The number of nodes for a given NodePool that can be concurrently disrupting at a point in time. Labeled by NodePool. Note that allowed disruptions can change very rapidly, as new nodes may be created and others may be deleted at any point.

• Stability Level: ALPHA

Interruption Metrics

karpenter_interruption_received_messages_total

Count of messages received from the SQS queue. Broken down by message type and whether the message was actionable.

• Stability Level: STABLE

karpenter_interruption_message_queue_duration_seconds

Amount of time an interruption message is on the queue before it is processed by karpenter.

• Stability Level: STABLE

karpenter_interruption_deleted_messages_total

Count of messages deleted from the SQS queue.

• Stability Level: STABLE

Cluster State Metrics

karpenter_cluster_state_synced

Returns 1 if cluster state is synced and 0 otherwise. Synced checks that nodeclaims and nodes that are stored in the APIServer have the same representation as Karpenter’s cluster state

• Stability Level: STABLE

karpenter_cluster_state_node_count

Current count of nodes in cluster state

• Stability Level: STABLE

Cloudprovider Metrics

karpenter_cloudprovider_instance_type_offering_price_estimate

Instance type offering estimated hourly price used when making informed decisions on node cost calculation, based on instance type, capacity type, and zone.

• Stability Level: BETA

karpenter_cloudprovider_instance_type_offering_available

Instance type offering availability, based on instance type, capacity type, and zone

• Stability Level: BETA

karpenter_cloudprovider_instance_type_memory_bytes

Memory, in bytes, for a given instance type.

• Stability Level: BETA

karpenter_cloudprovider_instance_type_cpu_cores

VCPUs cores for a given instance type.

• Stability Level: BETA

karpenter_cloudprovider_errors_total

Total number of errors returned from CloudProvider calls.

• Stability Level: BETA

karpenter_cloudprovider_duration_seconds

Duration of cloud provider method calls. Labeled by the controller, method name and provider.

• Stability Level: BETA

Cloudprovider Batcher Metrics

karpenter_cloudprovider_batcher_batch_time_seconds

Duration of the batching window per batcher

• Stability Level: BETA

karpenter_cloudprovider_batcher_batch_size

Size of the request batch per batcher

• Stability Level: BETA

Controller Runtime Metrics

controller_runtime_terminal_reconcile_errors_total

Total number of terminal reconciliation errors per controller

• Stability Level: STABLE

controller_runtime_reconcile_total

Total number of reconciliations per controller

• Stability Level: STABLE

controller_runtime_reconcile_time_seconds

Length of time per reconciliation per controller

• Stability Level: STABLE

controller_runtime_reconcile_errors_total

Total number of reconciliation errors per controller

• Stability Level: STABLE

controller_runtime_max_concurrent_reconciles

Maximum number of concurrent reconciles per controller

• Stability Level: STABLE

controller_runtime_active_workers

Number of currently used workers per controller

• Stability Level: STABLE

Workqueue Metrics

workqueue_work_duration_seconds

How long in seconds processing an item from workqueue takes.

• Stability Level: STABLE

workqueue_unfinished_work_seconds

How many seconds of work has been done that is in progress and hasn’t been observed by work_duration. Large values indicate stuck threads. One can deduce the number of stuck threads by observing the rate at which this increases.

• Stability Level: STABLE

workqueue_retries_total

Total number of retries handled by workqueue

• Stability Level: STABLE

workqueue_queue_duration_seconds

How long in seconds an item stays in workqueue before being requested

• Stability Level: STABLE

workqueue_longest_running_processor_seconds

How many seconds has the longest running processor for workqueue been running.

• Stability Level: STABLE

workqueue_depth

Current depth of workqueue

• Stability Level: STABLE

workqueue_adds_total

Total number of adds handled by workqueue

• Stability Level: STABLE

Status Condition Metrics

operator_status_condition_transitions_total

The count of transitions of a given object, type and status.

• Stability Level: BETA

operator_status_condition_transition_seconds

The amount of time a condition was in a given state before transitioning. e.g. Alarm := P99(Updated=False) > 5 minutes

• Stability Level: BETA

operator_status_condition_current_status_seconds

The current amount of time in seconds that a status condition has been in a specific state. Alarm := P99(Updated=Unknown) > 5 minutes

• Stability Level: BETA

operator_status_condition_count

The number of an condition for a given object, type and status. e.g. Alarm := Available=False > 0

• Stability Level: BETA

Client Go Metrics

client_go_request_total

Number of HTTP requests, partitioned by status code and method.

• Stability Level: STABLE

client_go_request_duration_seconds

Request latency in seconds. Broken down by verb, group, version, kind, and subresource.

• Stability Level: STABLE

AWS SDK Go Metrics

aws_sdk_go_request_total

The total number of AWS SDK Go requests

• Stability Level: STABLE

aws_sdk_go_request_retry_count

The total number of AWS SDK Go retry attempts per request

• Stability Level: STABLE

aws_sdk_go_request_duration_seconds

Latency of AWS SDK Go requests

• Stability Level: STABLE

aws_sdk_go_request_attempt_total

The total number of AWS SDK Go request attempts

• Stability Level: STABLE

aws_sdk_go_request_attempt_duration_seconds

Latency of AWS SDK Go request attempts

• Stability Level: STABLE

Leader Election Metrics

leader_election_slowpath_total

Total number of slow path exercised in renewing leader leases. ’name’ is the string used to identify the lease. Please make sure to group by name.

• Stability Level: STABLE

leader_election_master_status

Gauge of if the reporting system is master of the relevant lease, 0 indicates backup, 1 indicates master. ’name’ is the string used to identify the lease. Please make sure to group by name.

• Stability Level: STABLE