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metrics.go
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/
metrics.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-2019 Datadog, Inc.
package extendeddaemonsetreplicaset
import (
ksmetric "k8s.io/kube-state-metrics/pkg/metric"
"sigs.k8s.io/controller-runtime/pkg/manager"
datadoghqv1alpha1 "github.com/DataDog/extendeddaemonset/api/v1alpha1"
"github.com/DataDog/extendeddaemonset/controllers/extendeddaemonsetreplicaset/conditions"
"github.com/DataDog/extendeddaemonset/pkg/controller/metrics"
"github.com/DataDog/extendeddaemonset/pkg/controller/utils"
)
const (
ersCreated = "ers_created"
ersStatusDesired = "ers_status_desired"
ersStatusCurrent = "ers_status_current"
ersStatusReady = "ers_status_ready"
ersStatusAvailable = "ers_status_available"
ersStatusIgnoredUnresponsiveNodes = "ers_status_ignored_unresponsive_nodes"
ersStatusCanaryFailed = "ers_status_canary_failed"
ersLabels = "ers_labels"
)
func init() {
metrics.RegisterHandlerFunc(addMetrics)
}
func addMetrics(mgr manager.Manager, h metrics.Handler) error {
return metrics.AddMetrics(datadoghqv1alpha1.GroupVersion.WithKind("ExtendedDaemonSetReplicaSet"), mgr, h, generateMetricFamilies())
}
func generateMetricFamilies() []ksmetric.FamilyGenerator {
return []ksmetric.FamilyGenerator{
{
Name: ersLabels,
Type: ksmetric.Gauge,
Help: "Kubernetes labels converted to Prometheus labels",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
extraKeys, extraValues := utils.BuildInfoLabels(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: 1,
LabelKeys: append(labelKeys, extraKeys...),
LabelValues: append(labelValues, extraValues...),
},
},
}
},
},
{
Name: ersCreated,
Type: ksmetric.Gauge,
Help: "Unix creation timestamp",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: float64(ers.CreationTimestamp.Unix()),
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
{
Name: ersStatusDesired,
Type: ksmetric.Gauge,
Help: "The number of nodes that should be running the daemon pod.",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: float64(ers.Status.Desired),
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
{
Name: ersStatusCurrent,
Type: ksmetric.Gauge,
Help: "The number of nodes running at least one daemon pod and are supposed to.",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: float64(ers.Status.Current),
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
{
Name: ersStatusReady,
Type: ksmetric.Gauge,
Help: "The number of nodes that should be running the daemon pod and have one or more of the daemon pod running and ready.",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: float64(ers.Status.Ready),
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
{
Name: ersStatusAvailable,
Type: ksmetric.Gauge,
Help: "The number of nodes that should be running the daemon pod and have one or more of the daemon pod running and available.",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: float64(ers.Status.Available),
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
{
Name: ersStatusIgnoredUnresponsiveNodes,
Type: ksmetric.Gauge,
Help: "The total number of nodes that are ignored by the rolling update strategy due to an unresponsive state",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: float64(ers.Status.IgnoredUnresponsiveNodes),
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
{
Name: ersStatusCanaryFailed,
Type: ksmetric.Gauge,
Help: "The failed state of the canary deployment, set to 1 if failed, else 0",
GenerateFunc: func(obj interface{}) *ksmetric.Family {
ers := obj.(*datadoghqv1alpha1.ExtendedDaemonSetReplicaSet)
labelKeys, labelValues := utils.GetLabelsValues(&ers.ObjectMeta)
val := float64(0)
if conditions.IsConditionTrue(&ers.Status, datadoghqv1alpha1.ConditionTypeCanaryFailed) {
val = 1
}
return &ksmetric.Family{
Metrics: []*ksmetric.Metric{
{
Value: val,
LabelKeys: labelKeys,
LabelValues: labelValues,
},
},
}
},
},
}
}