381 lines
10 KiB
Go
381 lines
10 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package store
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import (
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"strings"
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"k8s.io/kube-state-metrics/pkg/constant"
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"k8s.io/kube-state-metrics/pkg/metric"
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generator "k8s.io/kube-state-metrics/pkg/metric_generator"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/watch"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/cache"
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)
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var (
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descNodeLabelsName = "kube_node_labels"
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descNodeLabelsHelp = "Kubernetes labels converted to Prometheus labels."
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descNodeLabelsDefaultLabels = []string{"node"}
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nodeMetricFamilies = []generator.FamilyGenerator{
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{
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Name: "kube_node_info",
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Type: metric.Gauge,
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Help: "Information about a cluster node.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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return &metric.Family{
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Metrics: []*metric.Metric{
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{
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LabelKeys: []string{
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"kernel_version",
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"os_image",
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"container_runtime_version",
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"kubelet_version",
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"kubeproxy_version",
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"provider_id",
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"pod_cidr",
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},
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LabelValues: []string{
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n.Status.NodeInfo.KernelVersion,
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n.Status.NodeInfo.OSImage,
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n.Status.NodeInfo.ContainerRuntimeVersion,
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n.Status.NodeInfo.KubeletVersion,
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n.Status.NodeInfo.KubeProxyVersion,
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n.Spec.ProviderID,
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n.Spec.PodCIDR,
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},
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Value: 1,
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},
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},
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}
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}),
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},
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{
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Name: "kube_node_created",
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Type: metric.Gauge,
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Help: "Unix creation timestamp",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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ms := []*metric.Metric{}
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if !n.CreationTimestamp.IsZero() {
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ms = append(ms, &metric.Metric{
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Value: float64(n.CreationTimestamp.Unix()),
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})
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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},
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{
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Name: descNodeLabelsName,
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Type: metric.Gauge,
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Help: descNodeLabelsHelp,
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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labelKeys, labelValues := kubeLabelsToPrometheusLabels(n.Labels)
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return &metric.Family{
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Metrics: []*metric.Metric{
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{
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LabelKeys: labelKeys,
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LabelValues: labelValues,
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Value: 1,
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},
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},
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}
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}),
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},
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{
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Name: "kube_node_role",
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Type: metric.Gauge,
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Help: "The role of a cluster node.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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const prefix = "node-role.kubernetes.io/"
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ms := []*metric.Metric{}
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for lbl := range n.Labels {
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if strings.HasPrefix(lbl, prefix) {
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ms = append(ms, &metric.Metric{
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LabelKeys: []string{"role"},
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LabelValues: []string{strings.TrimPrefix(lbl, prefix)},
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Value: float64(1),
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})
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}
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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},
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{
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Name: "kube_node_spec_unschedulable",
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Type: metric.Gauge,
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Help: "Whether a node can schedule new pods.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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return &metric.Family{
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Metrics: []*metric.Metric{
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{
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Value: boolFloat64(n.Spec.Unschedulable),
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},
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},
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}
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}),
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},
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{
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Name: "kube_node_spec_taint",
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Type: metric.Gauge,
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Help: "The taint of a cluster node.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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ms := make([]*metric.Metric, len(n.Spec.Taints))
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for i, taint := range n.Spec.Taints {
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// Taints are applied to repel pods from nodes that do not have a corresponding
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// toleration. Many node conditions are optionally reflected as taints
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// by the node controller in order to simplify scheduling constraints.
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ms[i] = &metric.Metric{
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LabelKeys: []string{"key", "value", "effect"},
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LabelValues: []string{taint.Key, taint.Value, string(taint.Effect)},
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Value: 1,
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}
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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},
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// This all-in-one metric family contains all conditions for extensibility.
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// Third party plugin may report customized condition for cluster node
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// (e.g. node-problem-detector), and Kubernetes may add new core
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// conditions in future.
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{
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Name: "kube_node_status_condition",
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Type: metric.Gauge,
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Help: "The condition of a cluster node.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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ms := make([]*metric.Metric, len(n.Status.Conditions)*len(conditionStatuses))
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// Collect node conditions and while default to false.
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for i, c := range n.Status.Conditions {
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conditionMetrics := addConditionMetrics(c.Status)
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for j, m := range conditionMetrics {
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metric := m
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metric.LabelKeys = []string{"condition", "status"}
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metric.LabelValues = append([]string{string(c.Type)}, metric.LabelValues...)
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ms[i*len(conditionStatuses)+j] = metric
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}
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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},
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{
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Name: "kube_node_status_capacity",
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Type: metric.Gauge,
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Help: "The capacity for different resources of a node.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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ms := []*metric.Metric{}
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capacity := n.Status.Capacity
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for resourceName, val := range capacity {
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switch resourceName {
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case v1.ResourceCPU:
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitCore),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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case v1.ResourceStorage:
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fallthrough
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case v1.ResourceEphemeralStorage:
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fallthrough
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case v1.ResourceMemory:
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitByte),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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case v1.ResourcePods:
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitInteger),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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default:
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if isHugePageResourceName(resourceName) {
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitByte),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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}
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if isAttachableVolumeResourceName(resourceName) {
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitByte),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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}
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if isExtendedResourceName(resourceName) {
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitInteger),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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}
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}
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}
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for _, metric := range ms {
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metric.LabelKeys = []string{"resource", "unit"}
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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},
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{
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Name: "kube_node_status_allocatable",
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Type: metric.Gauge,
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Help: "The allocatable for different resources of a node that are available for scheduling.",
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GenerateFunc: wrapNodeFunc(func(n *v1.Node) *metric.Family {
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ms := []*metric.Metric{}
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allocatable := n.Status.Allocatable
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for resourceName, val := range allocatable {
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switch resourceName {
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case v1.ResourceCPU:
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitCore),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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case v1.ResourceStorage:
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fallthrough
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case v1.ResourceEphemeralStorage:
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fallthrough
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case v1.ResourceMemory:
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitByte),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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case v1.ResourcePods:
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitInteger),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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default:
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if isHugePageResourceName(resourceName) {
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitByte),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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}
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if isAttachableVolumeResourceName(resourceName) {
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitByte),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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}
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if isExtendedResourceName(resourceName) {
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ms = append(ms, &metric.Metric{
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LabelValues: []string{
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sanitizeLabelName(string(resourceName)),
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string(constant.UnitInteger),
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},
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Value: float64(val.MilliValue()) / 1000,
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})
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}
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}
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}
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for _, m := range ms {
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m.LabelKeys = []string{"resource", "unit"}
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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},
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}
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)
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func wrapNodeFunc(f func(*v1.Node) *metric.Family) func(interface{}) *metric.Family {
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return func(obj interface{}) *metric.Family {
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node := obj.(*v1.Node)
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metricFamily := f(node)
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for _, m := range metricFamily.Metrics {
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m.LabelKeys = append(descNodeLabelsDefaultLabels, m.LabelKeys...)
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m.LabelValues = append([]string{node.Name}, m.LabelValues...)
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}
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return metricFamily
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}
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}
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func createNodeListWatch(kubeClient clientset.Interface, ns string) cache.ListerWatcher {
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return &cache.ListWatch{
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ListFunc: func(opts metav1.ListOptions) (runtime.Object, error) {
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return kubeClient.CoreV1().Nodes().List(opts)
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},
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WatchFunc: func(opts metav1.ListOptions) (watch.Interface, error) {
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return kubeClient.CoreV1().Nodes().Watch(opts)
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},
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}
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}
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