metrics

var (
	// OperatorVersionLabel describes version of running binary.
	OperatorVersionLabel = monitoring.CreateLabel("version")

	// MergeErrorLabel describes the type of merge error.
	MergeErrorLabel = monitoring.CreateLabel("error_type")

	// RenderErrorLabel describes the type of the error while rendering.
	RenderErrorLabel = monitoring.CreateLabel("render_error")

	// CRFetchErrorReasonLabel describes the reason/HTTP code
	// for failing to fetch CR.
	CRFetchErrorReasonLabel = monitoring.CreateLabel("reason")

	// ComponentNameLabel represents istio component name - like
	// core, pilot, istio-cni etc.
	ComponentNameLabel = monitoring.CreateLabel("component")

	// ResourceKindLabel indicates the kind of resource owned
	// or created or updated or deleted or pruned by operator.
	ResourceKindLabel = monitoring.CreateLabel("kind")

	// ReconcileRequestReasonLabel describes reason of reconcile request.
	ReconcileRequestReasonLabel = monitoring.CreateLabel("reason")
)

var (
	// Version is the version of the operator binary running currently.
	Version = monitoring.NewGauge(
		"version",
		"Version of operator binary",
	)

	ReconcileRequestTotal = monitoring.NewSum(
		"reconcile_request_total",
		"Number of times requesting Reconcile",
	)

	// GetCRErrorTotal counts the number of times fetching
	// CR fails from API server.
	GetCRErrorTotal = monitoring.NewSum(
		"get_cr_error_total",
		"Number of times fetching CR from apiserver failed",
	)

	// CRMergeFailureTotal counts number of CR merge failures.
	CRMergeFailureTotal = monitoring.NewSum(
		"cr_merge_failure_total",
		"Number of IstioOperator CR merge failures",
	)

	// CRDeletionTotal counts the number of times
	// IstioOperator CR was deleted.
	CRDeletionTotal = monitoring.NewSum(
		"cr_deletion_total",
		"Number of IstioOperator CR deleted",
	)

	// CRValidationErrorTotal counts the number of CR
	// validation failures.
	CRValidationErrorTotal = monitoring.NewSum(
		"cr_validation_error_total",
		"Number of IstioOperator CR validation failures",
	)

	// RenderManifestTotal counts the number of manifest
	// renders at each component level.
	RenderManifestTotal = monitoring.NewSum(
		"render_manifest_total",
		"Number of component manifests rendered",
	)

	// OwnedResourceTotal indicates the number of resources
	// currently owned by the CR with given name and revision.
	OwnedResourceTotal = monitoring.NewGauge(
		"owned_resource_total",
		"Number of resources currently owned by the operator",
	)

	// ResourceCreationTotal indicates the number of resources
	// created by the operator for a CR and revision.
	ResourceCreationTotal = monitoring.NewSum(
		"resource_creation_total",
		"Number of resources created by the operator",
	)

	// ResourceUpdateTotal indicates the number of resources updated by
	// the operator in response to CR updates for a revision.
	ResourceUpdateTotal = monitoring.NewSum(
		"resource_update_total",
		"Number of resources updated by the operator",
	)

	// ResourceDeletionTotal indicates the number of resources deleted
	// by the operator in response to CR update or delete operation (like
	// ingress-gateway which was enabled could be disabled and this requires
	// deleting ingress-gateway deployment).
	ResourceDeletionTotal = monitoring.NewSum(
		"resource_deletion_total",
		"Number of resources deleted by the operator",
	)

	// ResourcePruneTotal indicates the resources pruned as a result of update.
	ResourcePruneTotal = monitoring.NewSum(
		"resource_prune_total",
		"Number of resources pruned by the operator",
	)

	// ManifestPatchErrorTotal counts the total number of K8S patch errors.
	ManifestPatchErrorTotal = monitoring.NewSum(
		"manifest_patch_error_total",
		"Number of times K8S patch overlays failed",
	)

	// ManifestRenderErrorTotal counts errors occurred while rendering manifest.
	ManifestRenderErrorTotal = monitoring.NewSum(
		"manifest_render_error_total",
		"Number of times error occurred during rendering output manifest",
	)

	// LegacyPathTranslationTotal counts the translations from legacy API to new one.
	LegacyPathTranslationTotal = monitoring.NewSum(
		"legacy_path_translation_total",
		"Number of times a legacy API path is translated",
	)

	// CacheFlushTotal counts number of cache flushes.
	CacheFlushTotal = monitoring.NewSum(
		"cache_flush_total",
		"number of times operator cache was flushed",
	)
)