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[FEATURE] Operator: Basic Metrics enabled
Enable basic metrics for the operator: - controller: workqueue, tenant operation (optional detailed) metrics - subscription: http handler metrics Note: For the controller, detailed tenant operation metrics are disabled by default and can be enabled by setting the environment variable: `DETAILED_OPERATION_METRICS` to `true`. Documentation will be published under: https://sap.github.io/cap-operator/docs/usage/operator-metrics/
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,182 @@ | ||
| /* | ||
| SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and cap-operator contributors | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package controller | ||
|
|
||
| import ( | ||
| "os" | ||
|
|
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| "github.com/prometheus/client_golang/prometheus" | ||
| "k8s.io/client-go/util/workqueue" | ||
| ) | ||
|
|
||
| // Constants for the metrics | ||
| const ( | ||
| CAPOp = "cap_op" | ||
| Queue = "queue" | ||
| // Metrics for workqueue | ||
| Depth = "depth" | ||
| Adds = "adds_total" | ||
| QueueLatency = "latency_seconds" | ||
| WorkDuration = "work_duration_seconds" | ||
| UnfinishedWork = "unfinished_work_seconds" | ||
| LongestRunningProcessor = "longest_running_processor_seconds" | ||
| Retries = "retries_total" | ||
| ) | ||
|
|
||
| var ( | ||
| // Metrics for CROs in Error (Kind along with namespace & name of the CRO) | ||
| ReconcileErrors = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: CAPOp, | ||
| Name: "reconcile_errors", | ||
| Help: "Resources that failed to reconcile", | ||
| }, []string{"kind", "namespace", "name"}) | ||
|
|
||
| // Metrics for CROs in Panic (namespace-name of the CRO) | ||
| Panics = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: CAPOp, | ||
| Name: "panics", | ||
| Help: "Resources that caused a panic", | ||
| }, []string{"kind", "namespace", "name"}) | ||
|
|
||
| // Metrics for overall tenant operations | ||
| TenantOperations = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: CAPOp, | ||
| Name: "tenant_operations", | ||
| Help: "Overall number of tenant operations", | ||
| }, []string{"app", "operation"}) | ||
|
|
||
| // Metrics for TenantOperation Failures (with app, operation, namespace & name of the tenant operation) | ||
| TenantOperationFailures = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: CAPOp, | ||
| Name: "tenant_operation_failures", | ||
| Help: "Tenant operations that failed to complete", | ||
| }, []string{"app", "operation", "tenant_id", "namespace", "name"}) | ||
|
|
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| // Metrics for duration of TenantOperations (could help with determining duration of saas provisioning callback for e.g.) | ||
| LastTenantOperationDuration = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: CAPOp, | ||
| Name: "last_tenant_operation_duration_seconds", | ||
| Help: "Duration of last tenant operation in seconds", | ||
| }, []string{"app", "tenant_id"}) | ||
|
|
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| /** | ||
| Note: | ||
| All the metrics below are for the CAP Operator controller workqueue, | ||
| used for handling CAP Operator resources. | ||
| These need to be explicitly defined here along with a capOperatorMetricsProvider, | ||
| as we have our own controller/workqueue implementation. | ||
| **/ | ||
|
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| depth = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: Depth, | ||
| Help: "Depth of workqueue", | ||
| }, []string{"name"}) | ||
|
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| adds = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: Adds, | ||
| Help: "Adds to workqueue", | ||
| }, []string{"name"}) | ||
|
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| latency = prometheus.NewHistogramVec(prometheus.HistogramOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: QueueLatency, | ||
| Help: "Latency of workqueue", | ||
| Buckets: prometheus.ExponentialBuckets(10e-9, 10, 10), | ||
| }, []string{"name"}) | ||
|
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| workDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: WorkDuration, | ||
| Help: "Processing time of workqueue", | ||
| Buckets: prometheus.ExponentialBuckets(10e-9, 10, 10), | ||
| }, []string{"name"}) | ||
|
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| unfinished = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: UnfinishedWork, | ||
| Help: "Unfinished work in workqueue", | ||
| }, []string{"name"}) | ||
|
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| longestRunningProcessor = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: LongestRunningProcessor, | ||
| Help: "Longest running processor in workqueue", | ||
| }, []string{"name"}) | ||
|
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| retries = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: CAPOp, | ||
| Subsystem: Queue, | ||
| Name: Retries, | ||
| Help: "Retries in workqueue", | ||
| }, []string{"name"}) | ||
| ) | ||
|
|
||
| // Create a varaible to hold all the collectors | ||
| var collectors = []prometheus.Collector{ReconcileErrors, Panics, TenantOperations, depth, adds, latency, workDuration, unfinished, longestRunningProcessor, retries} | ||
|
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| // #region capOperatorMetricsProvider | ||
| // capOperatorMetricsProvider implements workqueue.MetricsProvider | ||
| type capOperatorMetricsProvider struct { | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewDepthMetric(name string) workqueue.GaugeMetric { | ||
| return depth.WithLabelValues(name) | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewAddsMetric(name string) workqueue.CounterMetric { | ||
| return adds.WithLabelValues(name) | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewLatencyMetric(name string) workqueue.HistogramMetric { | ||
| return latency.WithLabelValues(name) | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewWorkDurationMetric(name string) workqueue.HistogramMetric { | ||
| return workDuration.WithLabelValues(name) | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewUnfinishedWorkSecondsMetric(name string) workqueue.SettableGaugeMetric { | ||
| return unfinished.WithLabelValues(name) | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewLongestRunningProcessorSecondsMetric(name string) workqueue.SettableGaugeMetric { | ||
| return longestRunningProcessor.WithLabelValues(name) | ||
| } | ||
|
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| func (capOperatorMetricsProvider) NewRetriesMetric(name string) workqueue.CounterMetric { | ||
| return retries.WithLabelValues(name) | ||
| } | ||
|
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| // #endregion | ||
|
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| // Initialize the metrics | ||
| func initializeMetrics() { | ||
| // Parse DETAILED_OPERATION_METRICS env. to determine if detailed operation metrics are needed | ||
| if os.Getenv("DETAILED_OPERATION_METRICS") == "true" { | ||
| collectors = append(collectors, TenantOperationFailures, LastTenantOperationDuration) | ||
| } | ||
|
|
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| // Register CAP Operator metrics | ||
| prometheus.MustRegister(collectors...) | ||
|
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| // Register CAP Operator metrics provider as the workqueue metrics provider (needed for the workqueue metrics, to be done just once) | ||
| workqueue.SetProvider(capOperatorMetricsProvider{}) | ||
| } | ||
|
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| func deregisterMetrics() { | ||
| // Un-register CAP Operator metrics | ||
| for _, collector := range collectors { | ||
| prometheus.Unregister(collector) | ||
| } | ||
| } |
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