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Merge pull request #1816 from egernst/get-sandbox-metrics-cli

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Get sandbox metrics cli
This commit is contained in:
Bin Liu 2021-05-11 13:10:30 +08:00 committed by GitHub
commit bffb099d99
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3 changed files with 52 additions and 4 deletions
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38
src/runtime/cli/kata-metrics.go Normal file
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@ -0,0 +1,38 @@
// Copyright (c) 2021 Apple Inc.
//
// SPDX-License-Identifier: Apache-2.0
//
package main
import (
"fmt"
kataMonitor "github.com/kata-containers/kata-containers/src/runtime/pkg/kata-monitor"
"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils"
"github.com/urfave/cli"
)
var kataMetricsCLICommand = cli.Command{
Name: "metrics",
Usage: "gather metrics associated with infrastructure used to run a sandbox",
UsageText: "metrics <sandbox id>",
Action: func(context *cli.Context) error {
sandboxID := context.Args().Get(0)
if err := katautils.VerifyContainerID(sandboxID); err != nil {
return err
}
// Get the metrics!
metrics, err := kataMonitor.GetSandboxMetrics(sandboxID)
if err != nil {
return err
}
fmt.Printf("%s\n", metrics)
return nil
},
}

1
src/runtime/cli/main.go
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@ -122,6 +122,7 @@ var runtimeCommands = []cli.Command{
kataCheckCLICommand,
kataEnvCLICommand,
kataExecCLICommand,
kataMetricsCLICommand,
factoryCLICommand,
}

17
src/runtime/pkg/kata-monitor/metrics.go
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@ -176,7 +176,7 @@ func (km *KataMonitor) aggregateSandboxMetrics(encoder expfmt.Encoder) error {
for sandboxID, namespace := range sandboxes {
wg.Add(1)
go func(sandboxID, namespace string, results chan<- []*dto.MetricFamily) {
sandboxMetrics, err := getSandboxMetrics(sandboxID)
sandboxMetrics, err := getParsedMetrics(sandboxID)
if err != nil {
monitorLog.WithError(err).WithField("sandbox_id", sandboxID).Errorf("failed to get metrics for sandbox")
}
@ -229,12 +229,11 @@ func (km *KataMonitor) aggregateSandboxMetrics(encoder expfmt.Encoder) error {
return err
}
}
return nil
}
// getSandboxMetrics will get sandbox's metrics from shim
func getSandboxMetrics(sandboxID string) ([]*dto.MetricFamily, error) {
func getParsedMetrics(sandboxID string) ([]*dto.MetricFamily, error) {
body, err := doGet(sandboxID, defaultTimeout, "metrics")
if err != nil {
return nil, err
@ -243,6 +242,16 @@ func getSandboxMetrics(sandboxID string) ([]*dto.MetricFamily, error) {
return parsePrometheusMetrics(sandboxID, body)
}
// GetSandboxMetrics will get sandbox's metrics from shim
func GetSandboxMetrics(sandboxID string) (string, error) {
body, err := doGet(sandboxID, defaultTimeout, "metrics")
if err != nil {
return "", err
}
return string(body), nil
}
// parsePrometheusMetrics will decode metrics from Prometheus text format
// and return array of *dto.MetricFamily with an ASC order
func parsePrometheusMetrics(sandboxID string, body []byte) ([]*dto.MetricFamily, error) {