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114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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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 metrics
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import (
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"sync"
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"k8s.io/component-base/metrics"
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"k8s.io/component-base/metrics/legacyregistry"
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"k8s.io/kubernetes/pkg/kubelet/volumemanager/cache"
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"k8s.io/kubernetes/pkg/volume"
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volumeutil "k8s.io/kubernetes/pkg/volume/util"
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)
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const (
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pluginNameNotAvailable = "N/A"
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// Metric keys for Volume Manager.
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volumeManagerTotalVolumes = "volume_manager_total_volumes"
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)
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var (
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registerMetrics sync.Once
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totalVolumesDesc = metrics.NewDesc(
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volumeManagerTotalVolumes,
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"Number of volumes in Volume Manager",
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[]string{"plugin_name", "state"},
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nil,
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metrics.ALPHA, "",
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)
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)
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// volumeCount is a map of maps used as a counter.
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type volumeCount map[string]map[string]int64
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func (v volumeCount) add(state, plugin string) {
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count, ok := v[state]
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if !ok {
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count = map[string]int64{}
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}
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count[plugin]++
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v[state] = count
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}
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// Register registers Volume Manager metrics.
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func Register(asw cache.ActualStateOfWorld, dsw cache.DesiredStateOfWorld, pluginMgr *volume.VolumePluginMgr) {
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registerMetrics.Do(func() {
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legacyregistry.CustomMustRegister(&totalVolumesCollector{asw: asw, dsw: dsw, pluginMgr: pluginMgr})
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})
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}
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type totalVolumesCollector struct {
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metrics.BaseStableCollector
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asw cache.ActualStateOfWorld
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dsw cache.DesiredStateOfWorld
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pluginMgr *volume.VolumePluginMgr
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}
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var _ metrics.StableCollector = &totalVolumesCollector{}
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// DescribeWithStability implements the metrics.StableCollector interface.
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func (c *totalVolumesCollector) DescribeWithStability(ch chan<- *metrics.Desc) {
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ch <- totalVolumesDesc
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}
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// CollectWithStability implements the metrics.StableCollector interface.
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func (c *totalVolumesCollector) CollectWithStability(ch chan<- metrics.Metric) {
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for stateName, pluginCount := range c.getVolumeCount() {
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for pluginName, count := range pluginCount {
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ch <- metrics.NewLazyConstMetric(totalVolumesDesc,
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metrics.GaugeValue,
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float64(count),
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pluginName,
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stateName)
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}
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}
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}
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func (c *totalVolumesCollector) getVolumeCount() volumeCount {
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counter := make(volumeCount)
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for _, mountedVolume := range c.asw.GetMountedVolumes() {
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pluginName := volumeutil.GetFullQualifiedPluginNameForVolume(mountedVolume.PluginName, mountedVolume.VolumeSpec)
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if pluginName == "" {
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pluginName = pluginNameNotAvailable
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}
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counter.add("actual_state_of_world", pluginName)
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}
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for _, volumeToMount := range c.dsw.GetVolumesToMount() {
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pluginName := pluginNameNotAvailable
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if plugin, err := c.pluginMgr.FindPluginBySpec(volumeToMount.VolumeSpec); err == nil {
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pluginName = volumeutil.GetFullQualifiedPluginNameForVolume(plugin.GetPluginName(), volumeToMount.VolumeSpec)
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}
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counter.add("desired_state_of_world", pluginName)
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}
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return counter
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}
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