v1alpha1

type MetricNotification struct {
	Type                      MetricNotificationType `json:"type"`
	MetricType                MetricSourceType       `json:"metricType"`
	Name                      string                 `json:"name"`
	CurrentAverageValue       resource.Quantity      `json:"currentAverageValue,omitempty"`
	TargetAverageValue        *resource.Quantity     `json:"targetAverageValue,omitempty"`
	CurrentAverageUtilization *int32                 `json:"currentAverageUtilization,omitempty"`
	TargetAverageUtilization  *int32                 `json:"targetAverageUtilization,omitempty"`
	ScrapeTime                time.Time              `json:"scrapeTime"`
}

type MetricNotificationType string

type MetricReport []MetricNotification

type MetricSourceType string

type MetricSpec struct {
	// type is the type of metric source.  It should be "Pods" or "Resource",
	// each mapping to a matching field in the object.
	Type MetricSourceType `json:"type"`
	// pods refers to a metric describing each pod matching the selector
	// (for example, transactions-processed-per-second). The values will be
	// averaged together before being compared to the target value.
	// +optional
	Pods *PodsMetricSource `json:"pods,omitempty"`
	// resource refers to a resource metric (such as those specified in
	// requests and limits) known to Kubernetes describing each pod matching
	// the selector (e.g. CPU or memory).
	// +optional
	Resource *ResourceMetricSource `json:"resource,omitempty"`
}

type MetricStatus struct {
	// type is the type of metric source.  It should be "Pods" or "Resource",
	// each mapping to a matching field in the object.
	Type MetricSourceType `json:"type"`
	// alerting flags the metrics those values exceed defined thresholds
	Alerting bool `json:"alerting"`
	// pods refers to a metric describing each pod matching the selector
	// (for example, transactions-processed-per-second). The values will be
	// averaged together before being compared to the target value.
	// +optional
	Pods *PodsMetricStatus `json:"pods,omitempty"`
	// resource refers to a resource metric (such as those specified in
	// requests and limits) known to Kubernetes describing each pod
	// matching the selector (e.g. CPU or memory). Such metrics are built in to
	// Kubernetes, and have special scaling options on top of those available
	// to normal per-pod metrics using the "pods" source.
	// +optional
	Resource *ResourceMetricStatus `json:"resource,omitempty"`
	// scrapeTime is the last time the MetricWebhook scraped metrics
	ScrapeTime metav1.Time `json:"scrapeTime"`
}

type MetricWebhook struct {
	metav1.TypeMeta   `json:",inline"`
	metav1.ObjectMeta `json:"metadata,omitempty"`

	Spec   MetricWebhookSpec   `json:"spec,omitempty"`
	Status MetricWebhookStatus `json:"status,omitempty"`
}

type MetricWebhookList struct {
	metav1.TypeMeta `json:",inline"`
	metav1.ListMeta `json:"metadata,omitempty"`
	Items           []MetricWebhook `json:"items"`
}

type MetricWebhookSpec struct {
	// Selector is a label selector for pods for which metrics should be collected
	Selector metav1.LabelSelector `json:"selector"`
	// webhook points to the web endpoint that going to get metric alerts
	Webhook Webhook `json:"webhook"`
	// metrics contains the specifications for metrics thresholds
	// used to trigger webhook
	// +listType=set
	Metrics []MetricSpec `json:"metrics"`
	// scrapeInterval defines how frequently to scrape metrics
	ScrapeInterval metav1.Duration `json:"scrapeInterval"`
	// Determines whether a metric alert sent one more time after values go
	// under thresholds so that the client can track its adjustments improvements
	CooldownAlert bool `json:"cooldownAlert"`
}

type MetricWebhookStatus struct {
	// metrics is the last read state of the metrics used by this MetricWebhook.
	// +listType=set
	// +optional
	Metrics []MetricStatus `json:"metrics"`
}

type PodsMetricSource struct {
	// name is the name of the metric in question
	Name string `json:"name"`
	// targetAverageValue is the target value of the average of the
	// metric across all relevant pods (as a quantity)
	TargetAverageValue resource.Quantity `json:"targetAverageValue"`
}

type PodsMetricStatus struct {
	// name is the name of the metric in question
	Name string `json:"name"`
	// currentAverageValue is the current value of the average of the
	// metric across all relevant pods (as a quantity)
	CurrentAverageValue resource.Quantity `json:"currentAverageValue"`
	// targetAverageValue is the target value of the average of the
	// metric across all relevant pods (as a quantity) defined for this metric in specs
	TargetAverageValue resource.Quantity `json:"targetAverageValue"`
}

type ResourceMetricSource struct {
	// name is the name of the resource in question.
	Name v1.ResourceName `json:"name"`
	// targetAverageUtilization is the target value of the average of the
	// resource metric across all relevant pods, represented as a percentage of
	// the requested value of the resource for the pods.
	// +optional
	TargetAverageUtilization *int32 `json:"targetAverageUtilization,omitempty"`
	// targetAverageValue is the target value of the average of the
	// resource metric across all relevant pods, as a raw value (instead of as
	// a percentage of the request), similar to the "pods" metric source type.
	// +optional
	TargetAverageValue *resource.Quantity `json:"targetAverageValue,omitempty"`
}

type ResourceMetricStatus struct {
	// name is the name of the resource in question.
	Name v1.ResourceName `json:"name"`
	// currentAverageUtilization is the current value of the average of the
	// resource metric across all relevant pods, represented as a percentage of
	// the requested value of the resource for the pods.  It will only be
	// present if `targetAverageValue` was set in the corresponding metric
	// specification.
	// +optional
	CurrentAverageUtilization *int32 `json:"currentAverageUtilization,omitempty"`
	// targetAverageUtilization is the target value of the average of the
	// resource metric across all relevant pods defined for this metric in specs
	// +optional
	TargetAverageUtilization *int32 `json:"targetAverageUtilization,omitempty"`
	// currentAverageValue is the current value of the average of the
	// resource metric across all relevant pods, as a raw value (instead of as
	// a percentage of the request), similar to the "pods" metric source type.
	// It will always be set, regardless of the corresponding metric specification.
	CurrentAverageValue resource.Quantity `json:"currentAverageValue"`
	// targetAverageValue is the target value of the average of the
	// metric across all relevant pods (as a quantity) defined for this metric in specs
	TargetAverageValue *resource.Quantity `json:"targetAverageValue,omitempty"`
}

type Webhook struct {
	// Explicit URL to hit, instead of matching service.
	// If neither Url nor Service are specified, the webhook
	// triggers all matching pods
	// +optional
	Url string `json:"url"`
	// Referent service
	// If neither Url nor Service are specified, the webhook
	// triggers all matching pods
	// +optional
	Service string `json:"service"`
	// Service port the webserver serves on
	// +optional
	Port int32 `json:"port"`
	// URL path to the webhook
	// +optional
	Path string `json:"path"`
}