mirror of https://github.com/k3s-io/k3s
133 lines
3.5 KiB
Go
133 lines
3.5 KiB
Go
/*
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Copyright 2019 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 csi
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import (
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"context"
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"fmt"
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"time"
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"google.golang.org/grpc"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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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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var _ volume.MetricsProvider = &metricsCsi{}
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// metricsCsi represents a MetricsProvider that calculates the used,free and
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// capacity information for volume using volume path.
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type metricsCsi struct {
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// the directory path the volume is mounted to.
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targetPath string
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// Volume handle or id
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volumeID string
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//csiClient with cache
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csiClientGetter
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}
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// NewMetricsCsi creates a new metricsCsi with the Volume ID and path.
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func NewMetricsCsi(volumeID string, targetPath string, driverName csiDriverName) volume.MetricsProvider {
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mc := &metricsCsi{volumeID: volumeID, targetPath: targetPath}
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mc.csiClientGetter.driverName = driverName
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return mc
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}
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func (mc *metricsCsi) GetMetrics() (*volume.Metrics, error) {
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currentTime := metav1.Now()
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ctx, cancel := context.WithTimeout(context.Background(), csiTimeout)
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defer cancel()
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// Get CSI client
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csiClient, err := mc.csiClientGetter.Get()
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if err != nil {
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return nil, err
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}
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// Check whether "GET_VOLUME_STATS" is set
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volumeStatsSet, err := csiClient.NodeSupportsVolumeStats(ctx)
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if err != nil {
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return nil, err
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}
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// if plugin doesnot support volume status, return.
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if !volumeStatsSet {
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return nil, volume.NewNotSupportedErrorWithDriverName(
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string(mc.csiClientGetter.driverName))
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}
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// Get Volumestatus
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metrics, err := csiClient.NodeGetVolumeStats(ctx, mc.volumeID, mc.targetPath)
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if err != nil {
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return nil, err
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}
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if metrics == nil {
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return nil, fmt.Errorf("csi.NodeGetVolumeStats returned nil metrics for volume %s", mc.volumeID)
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}
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//set recorded time
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metrics.Time = currentTime
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return metrics, nil
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}
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// MetricsManager defines the metrics mananger for CSI operation
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type MetricsManager struct {
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driverName string
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}
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// NewCSIMetricsManager creates a CSIMetricsManager object
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func NewCSIMetricsManager(driverName string) *MetricsManager {
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cmm := MetricsManager{
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driverName: driverName,
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}
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return &cmm
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}
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type additionalInfo struct {
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Migrated string
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}
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type additionalInfoKeyType struct{}
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var additionalInfoKey additionalInfoKeyType
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// RecordMetricsInterceptor is a grpc interceptor that is used to
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// record CSI operation
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func (cmm *MetricsManager) RecordMetricsInterceptor(
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ctx context.Context,
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method string,
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req, reply interface{},
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cc *grpc.ClientConn,
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invoker grpc.UnaryInvoker,
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opts ...grpc.CallOption) error {
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start := time.Now()
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err := invoker(ctx, method, req, reply, cc, opts...)
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duration := time.Since(start)
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// Check if this is migrated operation
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additionalInfoVal := ctx.Value(additionalInfoKey)
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migrated := "false"
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if additionalInfoVal != nil {
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additionalInfoVal, ok := additionalInfoVal.(additionalInfo)
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if !ok {
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return err
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}
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migrated = additionalInfoVal.Migrated
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}
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// Record the metric latency
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volumeutil.RecordCSIOperationLatencyMetrics(cmm.driverName, method, err, duration, migrated)
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return err
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}
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