Metrics Glossary

This page documents all metrics surfaced in the shipped Grafana dashboards and PrometheusRule definitions. It is organized by plane (controlplane / dataplane), then by dashboard section, followed by recording rules and alert rules.

Naming conventions

Union services use colon-separated metric names (e.g., flyte:admin:execution_manager:active_executions). The first segment identifies the service, subsequent segments identify the subsystem.

Infrastructure metrics from kube-state-metrics and cAdvisor use the standard underscore convention (e.g., kube_deployment_status_replicas_available).

Recording rules are prefixed with union:cp: (controlplane) or union:dp: (dataplane).

Metric types: Counter (monotonically increasing), Gauge (point-in-time value), Histogram (bucketed distribution), Summary (quantile distribution).

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Controlplane metrics

Health

Metric	Type	Description
kube_deployment_status_replicas_available	Gauge	Number of available replicas per deployment. Used with kube_deployment_spec_replicas to compute availability ratio.
kube_deployment_spec_replicas	Gauge	Desired replica count per deployment.
kube_pod_container_status_restarts_total	Counter	Cumulative container restart count. Non-zero increase indicates crashlooping or OOM kills.
connect:server_requests_handled_total	Counter	Total Connect RPC requests handled, labeled by service and code. Used to compute error rate (non-OK/Canceled/NotFound codes).
authorizer:handler_panic	Gauge	Handler panic count in the authorizer service.
cluster:handler_panic	Gauge	Handler panic count in the cluster service.
dataproxy:handler_panic	Gauge	Handler panic count in the data proxy service.
executions:handler_panic	Gauge	Handler panic count in the executions service.
queue:handler_panic	Gauge	Handler panic count in the queue service.
usage:handler_panic	Gauge	Handler panic count in the usage service.

Ingress (nginx)

Metric	Type	Description
nginx_ingress_controller_request_duration_seconds_count	Counter	Total ingress requests, labeled by host, path, status. Used for request rate and error rate calculations.
nginx_ingress_controller_request_duration_seconds_bucket	Histogram	Ingress request duration distribution. Used for latency percentile calculations (p50/p95/p99). Includes TLS + routing + upstream response time.
nginx_ingress_controller_nginx_process_connections	Gauge	Current number of active client connections to ingress-nginx.

Connect / gRPC

Metric	Type	Description
connect:server_requests_handled_total	Counter	Connect protocol request throughput, labeled by service (e.g., ExecutionService, ClusterService), method, and code. The primary v2 request counter.
connect:server_request_duration_seconds_bucket	Histogram	Connect server request duration, labeled by service, method, type, code. Custom buckets: 0.05s–60s. Use histogram_quantile() for per-method latency (e.g., method="CreateRun").
grpc_server_handled_total	Counter	gRPC server request count, labeled by grpc_service, grpc_method, grpc_code. Used by CacheService (the only CP service using gRPC instead of Connect).

FlyteAdmin

Metric	Type	Description
flyte:admin:execution_manager:active_executions	Gauge	Current count of active workflow executions tracked by FlyteAdmin.
flyte:admin:node_execution_manager:active_node_executions	Gauge	Current count of active node executions.
flyte:admin:task_execution_manager:active_executions	Gauge	Current count of active task executions.
flyte:admin:execution_manager:executions_created	Counter	Total workflow executions created.
flyte:admin:execution_manager:execution_events_created	Counter	Total workflow execution events received from propeller.
flyte:admin:node_execution_manager:node_execution_events_created	Counter	Total node execution events received from propeller.
flyte:admin:task_execution_manager:task_execution_events_created	Counter	Total task execution events received from propeller.
flyte:admin:execution_manager:propeller_failures	Counter	Failures communicating with propeller.
flyte:admin:execution_manager:transformer_error	Counter	Model transformation errors during execution processing.
flyte:admin:execution_manager:publish_error	Counter	Notification publish failures.
flyte:admin:execution_manager:execution_termination_failure	Counter	Execution termination failures.
flyte:admin:create_execution:duration_ms	Summary	CreateExecution endpoint latency in milliseconds.
flyte:admin:create_execution_event:duration_ms	Summary	CreateExecutionEvent endpoint latency in milliseconds.
flyte:admin:get_execution:duration_ms	Summary	GetExecution endpoint latency in milliseconds.
flyte:admin:list_execution:duration_ms	Summary	ListExecution endpoint latency in milliseconds.
flyte:middleware:authorization:authz_approved	Counter	Requests approved by FlyteAdmin auth middleware.
flyte:middleware:authorization:authz_denied	Counter	Requests denied by FlyteAdmin auth middleware. High deny rate may indicate auth misconfiguration.

Executions service

Metric	Type	Description
executions:executions:handle_create_op_count	Counter	(v1 path only) Execution create operations processed. Does not fire on v2 CreateRun.
executions:executions:handle_ack_op_count	Counter	(v1 path only) Execution acknowledgement operations processed.
executions:executions:handle_create_op_bucket	Histogram	(v1 path only) Execution create operation latency distribution.
executions:executions:handle_ack_op_bucket	Histogram	(v1 path only) Execution ack operation latency distribution.
executions:workqueue:announce_cluster_assignment_bucket	Histogram	(v1 path only) End-to-end time from execution create to cluster assignment. V2 uses lease streaming instead.
executions:workqueue:send_operation_count	Counter	(v1 path only) Operations dispatched to the dataplane.
executions:workqueue:claim_operations	Counter	(v1 path only) Operations claimed from the database queue.
executions:workqueue:send_operation_failures	Counter	(v1 path only) Failed operation dispatches.
executions:workqueue:claim_operation_failures	Counter	(v1 path only) Failed operation claims.
executions:database:postgres:repositories:execution_ops:*_count	Counter	Per-operation DB latency counters (create, ack, claim, unclaim, get, update).
executions:database:postgres:errors:gorm_error	Counter	GORM-level database errors.
executions:database:postgres:errors:postgres_error	Counter	Native PostgreSQL errors.
executions:database:postgres:errors:not_found	Counter	Database not-found errors.
executions:executions:list_clusters:hits	Counter	Cluster list cache hits.
executions:executions:list_clusters:miss	Counter	Cluster list cache misses. High miss rate indicates excessive DB queries.
executions:executions:list_nodepools:hits	Counter	Nodepool list cache hits.
executions:executions:list_nodepools:miss	Counter	Nodepool list cache misses.
executions:app:leaser:pending_assignment_unlabeled	Gauge	(Apps/serving only) Apps waiting for cluster assignment. Does not track task runs.
executions:app:service:first_ack_latency_unlabeled_bucket	Histogram	(Apps/serving only) Time to deliver an app deployment to the dataplane. Does not track task runs.
executions:run:runs_sent	Counter	V2 runs dispatched to dataplane.
executions:run:actions_sent	Counter	V2 actions dispatched to dataplane.
executions:run:enqueue_action_failures	Counter	V2 action enqueue failures. Indicates queue service issues.
executions:run_notifier:notifications_sent	Counter	V2 run notifications sent per second.
executions:run_notifier:subscribers	Gauge	Active V2 notification subscribers.
executions:run:logs:tail_logs_bytes_read	Counter	Log bytes streamed via V2 log tailing.

Queue / Run-Scheduler

Metric	Type	Description
queue:metadata_store:total_run_count	Gauge	Total runs tracked by the queue metadata store.
queue:metadata_store:total_action_count	Gauge	Total actions tracked by the queue metadata store.
queue:metadata_store:scheduled_run_count	Gauge	Runs currently scheduled for execution.
queue:metadata_store:scheduled_action_count	Gauge	Actions currently scheduled for execution.
queue:scheduler:enqueued_leases	Counter	New leases enqueued by the scheduler.
queue:runner:completed_leases	Counter	Leases completed by the runner.
queue:aborter:aborted_leases	Counter	Leases aborted (cancelled).
queue:scheduler:input_queue_length	Gauge	Scheduler input queue depth. Growing values indicate backpressure.
queue:runner:input_queue_length	Gauge	Runner input queue depth.
queue:aborter:input_queue_length	Gauge	Aborter input queue depth.
queue:dispatcher:chain_queue_length	Gauge	Dispatcher chain queue depth.
queue:db:queue_length	Gauge	DB worker pool queue depth.
queue:dispatcher:operation_duration_bucket	Histogram	Dispatcher multi-step operation chain execution time, by operation type.
queue:state:get_duration_bucket	Histogram	State store get operation latency.
queue:state:put_duration_bucket	Histogram	State store put operation latency.
queue:state:active_states	Gauge	Number of active action states in the state store.
queue:state:terminal_states	Gauge	Number of terminal action states.
queue:eventer:record_action_errors	Counter	Eventer errors reporting action status to the executions service.
queue:scheduler:worker_capacity	Gauge	Remaining execution capacity per connected DP worker. Zero means worker is saturated.
queue:dispatcher:operation_failures	Counter	Failed dispatcher operations, by Go type. Indicates internal queue service errors.
queue:db:free_threads	Gauge	Idle worker goroutines in the DB pool. Zero means all threads busy.
queue:queue_client:free_threads	Gauge	Idle worker goroutines in the queue-client pool.
queue:state_client:free_threads	Gauge	Idle worker goroutines in the state-client pool.

Leasor (V2 lease scheduler)

The leasor is the V2 lease-based scheduler: it receives actions, assigns them to dataplane leaseworkers, and drives the full lease lifecycle. These metrics only appear on deployments running the V2 actions/leasor execution path. Counter metrics only emit series once there is activity, so an idle deployment reports fewer series than a busy one.

Metric	Type	Description
leasor:leases_by_state	Gauge	Lease count by state (unassigned, sent, pending_completion, pending_finalize, pending_retry, pending_abort_cascade) and type (run_action, finalize). The primary health signal: growing unassigned = scheduling is bottlenecked; growing sent = workers are stuck.
leasor:workers_connected	Gauge	Leaseworkers with an active lease stream. A sudden drop means workers disconnected.
leasor:active_runs	Gauge	Active runs in memory, by org.
leasor:active_actions	Gauge	Active actions in memory, by org.
leasor:queue_depth	Gauge	RunAction queue depth, by org and queue.
leasor:queue_active_runs	Gauge	Root runs holding queue run-concurrency capacity, by org/queue.
leasor:queue_max_run_concurrency	Gauge	Configured per-queue run-concurrency limit. Zero means unlimited.
leasor:schedule_skip_total	Counter	Leases the scheduler saw but could not place, by reason (e.g. no_workers, queue_at_run_concurrency, queue_no_cluster_workers, orphaned_lease).
leasor:dispatch_total	Counter	Lease dispatch attempts, by result (ok, worker_gone, persist_failed, …). ok dropping to zero while leases wait indicates a dispatch outage.
leasor:enqueue_total	Counter	EnqueueAction results, by result (ok, backpressure, error) and org.
leasor:enqueue_reject_total	Counter	Enqueues rejected before the store on a routing precondition, by reason (unknown_queue, queue_not_active, cross_cluster_pool, …).
leasor:queue_enqueue_reject_total	Counter	Queue-attributed enqueue rejects, by org, queue, reason.
leasor:terminal_total	Counter	Actions reaching a terminal state, by phase (succeeded, failed, aborted, timed_out).
leasor:expirations_total	Counter	Leases expired because the worker stopped heartbeating, by type.
leasor:enqueue_to_dispatch_seconds_bucket	Histogram	Time from enqueue (action enters unassigned) to dispatch delivery — the core “waiting for work” latency.
leasor:queue_wait_seconds_bucket	Histogram	Time a lease waited in unassigned before dispatch.
leasor:leaseworker_active	Gauge	Reported active worker slots, by org, worker_cluster, worker.
leasor:leaseworker_available	Gauge	Available scheduling slots on connected leaseworkers.
leasor:leaseworker_capacity	Gauge	Reported leaseworker capacity.

Actions (V2 action store)

The actions service is the sharded V2 front door for CreateRun: it stores actions and streams them to the leasor.

Metric	Type	Description
actions:actions_in_memory	Gauge	Actions currently held in the action store.
actions:active_watchers	Gauge	Active action watchers (streaming consumers).
actions:archive_queue_depth	Gauge	Depth of the archive/drain queue. Growing values indicate archival backpressure.

Cluster service

Metric	Type	Description
cluster:svc:update_status:updates_total	Counter	DP cluster status updates received.
cluster:svc:heartbeat:success_ms_count	Counter	Successful heartbeats received from DP clusters.
cluster:svc:update_status:success_ms	Summary	UpdateStatus RPC latency in milliseconds.
cluster:svc:heartbeat:success_ms	Summary	Heartbeat RPC latency in milliseconds.
cluster:svc:update_status:operator_restarts	Gauge	DP-reported operator restart count. Set by DP on each UpdateStatus call.
cluster:svc:update_status:propeller_restarts	Gauge	DP-reported propeller restart count.
cluster:database:postgres:errors:gorm_error	Counter	GORM-level database errors in the cluster service.
cluster:database:postgres:errors:postgres_error	Counter	Native PostgreSQL errors in the cluster service.
cluster:database:postgres:errors:not_found	Counter	Database not-found errors in the cluster service.
cluster:cluster_sync:health:unhealthy	Gauge	Cluster health status: 1=unhealthy, 0=healthy. Emitted per cluster on every Prometheus scrape.
cluster:cluster_sync:health:last_update_age	Gauge	Seconds since a cluster last sent a heartbeat. High values indicate a stale or disconnected cluster.
cluster:managed_cluster_client_cache:get:hits	Counter	LRU cache hits for managed cluster lookups.
cluster:managed_cluster_client_cache:get:miss	Counter	LRU cache misses for managed cluster lookups. High miss rate indicates excessive DB queries.

CacheService

Metric	Type	Description
flyte:cacheservice:cache:cache_hit_unlabeled	Counter	Cache hits — cached task output reused.
flyte:cacheservice:cache:not_found_unlabeled	Counter	Cache misses — task must execute.
flyte:cacheservice:cache:get_failure_unlabeled	Counter	Cache get failures — storage errors.
flyte:cacheservice:cache:reservation_contention_unlabeled	Counter	Cache reservation contention — workers blocked waiting for another worker’s cache computation.
flyte:cacheservice:cache:get_reservation_success_unlabeled	Counter	Cache reservations successfully acquired.
flyte:cacheservice:cache:release_reservation_success_unlabeled	Counter	Cache reservations successfully released.

Authorizer

Metric	Type	Description
authorizer:authorizer:cloudauthorizer:connect:authz_type_info	Gauge	Info metric indicating the active authorization mode (labeled by type).
authorizer:authorizer:cloudauthorizer:connect:authz_allowed	Counter	Requests allowed by the authorizer, labeled by identity_type and action.
authorizer:authorizer:cloudauthorizer:connect:authz_denied	Counter	Requests denied by the authorizer, labeled by identity_type and action.
authorizer:authorizer:cloudauthorizer:connect:authorize_duration_ms	Summary	End-to-end authorization decision latency in milliseconds.
authorizer:authorizer:cloudauthorizer:connect:backend_authorize_duration_ms_bucket	Histogram	Backend authorization call latency distribution (external authz server or policy engine).
authorizer:authorizer:cloudauthorizer:connect:backend_authorize_errors	Counter	Backend authorization errors, labeled by error_type.
authorizer:authorizer:cloudauthorizer:connect:authorize_errors_total	Counter	Total authorization errors, labeled by error_source.
authorizer:authorizer:cloudauthorizer:connect:external:fail_open_activated	Counter	Fail-open mode activations — authorization bypass due to unreachable external backend.
authorizer:authorizer:cloudauthorizer:connect:external:errors	Counter	External authorization backend errors. Used in recording rules to compute error rate.
authorizer:authorizer:cloudauthorizer:connect:external:authorize_duration_count	Counter	External authorization call count. Used as denominator for error rate calculation.

Data Proxy

Metric	Type	Description
dataproxy:domains:hits	Counter	Domain resolution cache hits.
dataproxy:domains:miss	Counter	Domain resolution cache misses.
dataproxy:clusterpoolcache:hits	Counter	Cluster pool routing cache hits.
dataproxy:clusterpoolcache:miss	Counter	Cluster pool routing cache misses.
dataproxy:images:read:success_ms_count	Counter	Successful image metadata reads from dataplane.
dataproxy:images:read:failure_ms_count	Counter	Failed image metadata reads from dataplane.
dataproxy:secrets_service:cluster_errors	Counter	Per-cluster secret proxy errors during fan-out operations, labeled by cluster and operation.

Usage service

Metric	Type	Description
usage:svc:report_billable_usage	Counter	Billable usage reports submitted.
usage:messages:messages_received	Counter	Usage messages received.
usage:messages:messages_sent	Counter	Usage messages sent.
usage:messages:messages_dropped	Counter	Usage messages dropped.
usage:messages:messages_failed	Counter	Usage message processing failures.
usage:messages:messages_processed	Counter	Usage messages successfully processed.
usage:messages:processing_time_ms	Summary	Usage message processing latency in milliseconds.

Infrastructure

Metric	Type	Description
container_cpu_usage_seconds_total	Counter	Cumulative CPU time consumed per container, in cores.
container_memory_working_set_bytes	Gauge	Working set memory per container in bytes. Watch for values approaching resource limits.

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Dataplane metrics

Health

Metric	Type	Description
kube_deployment_status_replicas_available	Gauge	Available replicas per DP deployment.
kube_deployment_spec_replicas	Gauge	Desired replica count per DP deployment.
kube_pod_container_status_restarts_total	Counter	Cumulative container restart count in the DP namespace.
flyte:propeller:all:execstats:active_workflow_executions	Gauge	Current active FlyteWorkflow CRD count managed by propeller.
executor:handler_panic	Gauge	Handler panic count in DP executor.

Union Operator

Metric	Type	Description
union_operator:work_queue:operations_processed	Counter	Execution operations successfully processed.
union_operator:work_queue:operations_failed	Counter	Execution operations that failed processing.
union_operator:heartbeat_updater:runs	Counter	Heartbeat update cycle runs.
union_operator:heartbeat_updater:run_errors	Counter	Heartbeat update cycle errors.
union_operator:status_updater:runs	Counter	Status update cycle runs.
union_operator:status_updater:run_errors	Counter	Status update cycle errors.
union_operator:prometheus_health_checker:run_errors	Counter	Prometheus health check errors.
union_operator:heartbeat:compute_capabilities_ms	Summary	Time to compute cluster capabilities during heartbeat (milliseconds).
union_operator:heartbeat:compute_usages_ms	Summary	Time to compute resource usages during heartbeat (milliseconds).
union_operator:heartbeat:list_workflows_ms	Summary	Time to list workflows during heartbeat (milliseconds).
union_operator:config_syncer:runs	Counter	Config sync cycle runs.
union_operator:config_syncer:run_errors	Counter	Config sync cycle errors.
union_operator:config_syncer:propeller_configmap_updated	Counter	Propeller ConfigMap updates triggered by config syncer.
union_operator:billable_usage_collector:runs	Counter	Billing collection cycle runs.
union_operator:billable_usage_collector:run_errors	Counter	Billing collection cycle errors. Failures mean billing data may be delayed.
union_operator:work_queue:paused	Gauge	1 when operator paused due to resource limits (FlyteWorkflow count or storage exceeded).

Executor (V2)

Metric	Type	Description
executor::v2:active_actions_count	Gauge	Current active V2 actions. Note: the ::v2: prefix is a known naming issue (FAB-308).
executor::v2:available_capacity	Gauge	Available executor capacity. Zero means executor is saturated.
executor::v2:discovery_miss_count	Counter	V2 cache discovery misses for task output caching.
executor::v2:discovery_put_success_count	Counter	V2 cache discovery successful puts.
executor::v2:actions_terminated	Counter	Task completion count, labeled by phase (Succeeded, Failed, Aborted). Key V2 SLI for task health.
executor::v2:evaluator:evaluate_duration_ms	Summary	Time spent in RecursiveNodeHandler (pod creation). Dominant component of V2 task latency.
executor::v2:system_failures	Counter	System failures (retryable).
executor::v2:system_failures_exhausted	Counter	System failures with retries exhausted — task permanently failed.
executor::v2:invalid_leases	Counter	Invalid leases received from queue service (malformed).
executor::v2:evaluator:evaluate_errors	Counter	Evaluator errors during task processing.

Flyte Propeller (V1)

Metric	Type	Description
flyte:propeller:all:round:round_time_unlabeled_ms	Summary	Propeller reconciliation round time in milliseconds. One round = one FlyteWorkflow CRD processed.
flyte:propeller:all:round:success_count	Counter	Successful propeller rounds.
flyte:propeller:all:round:error_count	Counter	Failed propeller rounds.
flyte:propeller:all:round:panic_unlabeled	Counter	Panics during propeller rounds.
flyte:propeller:all:free_workers_count	Gauge	Idle propeller worker goroutines. Zero means all workers busy processing workflows.
flyte:propeller:all:main_depth	Gauge	Main workqueue depth.
flyte:propeller:all:sub_depth	Gauge	Sub workqueue depth.
flyte:propeller:all:main_adds	Counter	Items enqueued to propeller’s main workqueue.
flyte:propeller:all:sub_adds	Counter	Items enqueued to propeller’s sub workqueue.
flyte:propeller:all:main_retries	Counter	Main workqueue retries.
flyte:propeller:all:wf_updated	Counter	Successful FlyteWorkflow etcd writes.
flyte:propeller:all:wf_update_failed	Counter	Failed FlyteWorkflow etcd writes.
flyte:propeller:all:wf_too_large	Counter	FlyteWorkflow objects exceeding 1.5MB etcd size limit.
flyte:propeller:all:wf_update_conflict	Counter	Optimistic concurrency conflicts on FlyteWorkflow writes.
flyte:propeller:all:wf_update_latency_ms	Summary	etcd write latency for FlyteWorkflow status updates (milliseconds).
flyte:propeller:all:node:queueing_latency_unlabeled_ms	Summary	Node queueing latency: time from queued to running (milliseconds).
flyte:propeller:all:node:node_exec_latency_unlabeled_us	Summary	Node execution latency: time spent in handler (microseconds).
flyte:propeller:all:metastore:cache_hit	Counter	In-memory cache hits for object store (S3/GCS) reads.
flyte:propeller:all:metastore:cache_miss	Counter	In-memory cache misses for object store reads. Low hit rate indicates excessive storage calls.
flyte:propeller:all:execstats:active_workflow_executions	Gauge	Active workflow execution count.
flyte:propeller:all:execstats:active_node_executions	Gauge	Active node execution count.
flyte:propeller:all:execstats:active_task_executions	Gauge	Active task execution count.
flyte:propeller:all:task:event_recording:success_duration_ms_count	Counter	Successful task event recordings to FlyteAdmin.
flyte:propeller:all:node:event_recording:success_duration_ms_count	Counter	Successful node event recordings to FlyteAdmin.
flyte:propeller:all:task:event_recording:failure_duration_ms_count	Counter	Failed task event recordings. Indicates CP connectivity issues.
flyte:propeller:all:node:event_recording:failure_duration_ms_count	Counter	Failed node event recordings.
flyte:propeller:all:discovery_hit_count	Counter	Task output cache discovery hits.
flyte:propeller:all:discovery_miss_count	Counter	Task output cache discovery misses.
flyte:propeller:all:discovery_skip_count	Counter	Task output cache discovery skips.
flyte:propeller:all:discovery_get_failure_count	Counter	Task output cache discovery get failures.

K8s API client

Metric	Type	Description
k8s_client_request_total_unlabeled	Counter	Propeller’s total K8s API requests. High rates may indicate excessive pod watches or creates.
k8s_client_request_latency_unlabeled_bucket	Histogram	K8s API request latency distribution.
k8s_client_rate_limiter_latency_unlabeled_bucket	Histogram	Client-side rate limiter wait time distribution. Non-zero indicates the K8s API client is being throttled.

gRPC client (DP to CP)

Metric	Type	Description
grpc_client_handled_total	Counter	DP-to-CP gRPC client request count, labeled by grpc_service, grpc_method, grpc_code.
grpc_client_handling_seconds_bucket	Histogram	DP-to-CP gRPC call latency distribution. High latency indicates slow control plane or network issues.

Infrastructure

Metric	Type	Description
container_cpu_usage_seconds_total	Counter	Cumulative CPU time consumed per DP container.
container_memory_working_set_bytes	Gauge	Working set memory per DP container. Watch for values approaching resource limits.
kube_resourcequota	Gauge	Per-project ResourceQuota usage from kube-state-metrics, by namespace, resource, and type (hard/used). Backs the ResourceQuota utilization panels and the UnionDPResourceQuotaNearSaturation alert. Filter on resourcequota="project-quota" to exclude cluster/system quotas.

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Recording rules

Recording rules are pre-computed by Prometheus and used in dashboard panels and alert conditions. They are defined in the PrometheusRule CRDs shipped with the Helm charts.

Controlplane recording rules (always active)

These rules are always enabled when monitoring.prometheusRules.enabled: true (default). Evaluation interval: 30s.

Rule	What it computes	Source metrics
union:cp:service_availability	Min availability ratio across all CP deployments	kube_deployment_status_replicas_available / kube_deployment_spec_replicas
union:cp:pod_restart_rate_1h	Pod restart count over the last hour	kube_pod_container_status_restarts_total
union:cp:connect_request_rate:by_service	Connect request rate per service (5m window)	connect:server_requests_handled_total
union:cp:connect_error_rate:by_service	Connect error rate per service (non-OK codes, 5m window)	connect:server_requests_handled_total
union:cp:ingress_request_rate	Total ingress request rate (5m window)	nginx_ingress_controller_request_duration_seconds_count
union:cp:ingress_error_rate_5xx	Ingress 5xx error rate (5m window)	nginx_ingress_controller_request_duration_seconds_count
union:cp:authz:external_error_rate	External authorizer error rate as a fraction	authorizer:...:external:errors / authorizer:...:external:authorize_duration_count

Controlplane SLO recording rules (opt-in)

Enabled when monitoring.slos.enabled: true. Evaluation interval: 30s.

Rule	What it computes	Source metrics
union:cp:slo:availability:ratio	Average deployment availability across all CP services	kube_deployment_status_replicas_available / kube_deployment_spec_replicas
union:cp:slo:connect_success_rate	Fraction of Connect requests with OK/Canceled/NotFound codes	connect:server_requests_handled_total
union:cp:slo:ingress_success_rate	Fraction of ingress requests with non-5xx status	nginx_ingress_controller_request_duration_seconds_count
union:cp:slo:ingress_latency_p99	Ingress p99 latency in seconds	nginx_ingress_controller_request_duration_seconds_bucket
union:cp:slo:error_budget_remaining	Fraction of error budget remaining (< 0 = exhausted)	Derived from union:cp:slo:connect_success_rate and configured availability target

Dataplane recording rules (always active)

These rules are always enabled when monitoring.prometheusRules.enabled: true (default). Evaluation interval: 30s.

Rule	What it computes	Source metrics
union:dp:service_availability	Min availability ratio across all DP deployments	kube_deployment_status_replicas_available / kube_deployment_spec_replicas
union:dp:propeller:round_latency_p99	Propeller round time at p99	flyte:propeller:all:round:round_time_unlabeled_ms
union:dp:propeller:active_workflows	Total active workflow executions	flyte:propeller:all:execstats:active_workflow_executions
union:dp:propeller:queue_depth	Total propeller main workqueue depth	flyte:propeller:all:main_depth
union:dp:operator:work_queue_failed_rate	Operator work queue failure rate (5m window)	union_operator:work_queue:operations_failed
union:dp:executor:active_actions	Current executor active action count	executor::v2:active_actions_count

Dataplane SLO recording rules (opt-in)

Enabled when monitoring.slos.enabled: true. Evaluation interval: 30s.

Rule	What it computes	Source metrics
union:dp:slo:availability:ratio	Average deployment availability across all DP services	kube_deployment_status_replicas_available / kube_deployment_spec_replicas
union:dp:slo:propeller_success_rate	Fraction of propeller rounds that succeed	flyte:propeller:all:round:success_count / (success_count + error_count)
union:dp:slo:propeller_round_latency_p99	Propeller round p99 latency in seconds	flyte:propeller:all:round:round_time_unlabeled_ms / 1000
union:dp:slo:executor_success_rate	Fraction of V2 actions that succeed	executor::v2:actions_terminated{phase="Succeeded"} / total terminated
union:dp:slo:execution_success_rate	Combined V1+V2 execution success rate (average of propeller + executor)	Derived from propeller_success_rate and executor_success_rate
union:dp:slo:error_budget_remaining	Fraction of error budget remaining (< 0 = exhausted)	Derived from union:dp:slo:execution_success_rate and configured availability target

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Alert rules

Alert rules fire when conditions are met for the specified duration. They are opt-in and require explicit Helm configuration to enable.

Controlplane operational alerts

Enabled when monitoring.alerting.enabled: true.

Alert	Severity	Condition	For	Description
UnionCPServiceDown	critical	replicas_available == 0	5m	A CP deployment has zero available replicas.
UnionCPHighRestartRate	warning	restarts > 5 in 1h	5m	A pod is restarting frequently (crash loop).
UnionCPHandlerPanic	critical	panic count > 0 in 1h	0m	Unrecovered panic in any CP service handler.
UnionCPAuthorizerExternalErrors	warning	error rate > 0.1/s	5m	External authorization backend returning errors.
UnionCPAuthorizerFailOpenActive	critical	fail_open rate > 0	1m	Authorization bypass due to unreachable external backend.
UnionCPAuthorizerHighDenyRate	warning	deny rate > 50%	10m	Possible authorization policy misconfiguration.
UnionCPLeasorRunsStuck	critical	unassigned run-actions > 0 and dispatch ok rate == 0	10m	Runs are waiting in the leasor while dispatch has stalled — runs are stuck.
UnionCPLeasorEnqueueRejects	warning	enqueue_reject rate > 0	15m	Sustained enqueue routing rejects (unknown/draining queue, or a queue missing a cluster selector).

Controlplane SLO alerts

Enabled when both monitoring.slos.enabled: true and monitoring.slos.alerting.enabled: true.

Alert	Severity	Condition	For	Description
UnionCPHighErrorBudgetBurn	warning	error_budget_remaining < 50%	15m	More than half the error budget has been consumed.
UnionCPErrorBudgetExhausted	critical	error_budget_remaining < 0	5m	Error budget fully exhausted.
UnionCPIngressLatencySLOBreach	warning	p99 > target	10m	Ingress p99 latency exceeding the configured SLO target.

Dataplane operational alerts

Enabled when monitoring.alerting.enabled: true.

Alert	Severity	Condition	For	Description
UnionDPServiceDown	critical	replicas_available == 0	5m	A DP deployment has zero available replicas.
UnionDPHighRestartRate	warning	restarts > 5 in 1h	5m	A pod is restarting frequently (crash loop).
UnionDPHandlerPanic	critical	executor panic > 0 in 1h	0m	Handler panic detected in DP executor.
UnionDPResourceQuotaNearSaturation	warning	project-quota used/hard >= 0.9	10m	A project ResourceQuota is near saturation; at 100% Kubernetes rejects pod creation and runs in that namespace stall.

Dataplane SLO alerts

Enabled when both monitoring.slos.enabled: true and monitoring.slos.alerting.enabled: true.

Alert	Severity	Condition	For	Description
UnionDPHighErrorBudgetBurn	warning	error_budget_remaining < 50%	15m	More than half the error budget has been consumed.
UnionDPErrorBudgetExhausted	critical	error_budget_remaining < 0	5m	Error budget fully exhausted.
UnionDPPropellerLatencySLOBreach	warning	p99 > target	10m	Propeller p99 latency exceeding the configured SLO target.