/
support-top-drive.go
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/
support-top-drive.go
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// Copyright (c) 2015-2022 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"context"
"time"
tea "github.com/charmbracelet/bubbletea"
"github.com/minio/cli"
"github.com/minio/madmin-go/v2"
"github.com/kirolous/mc/pkg/probe"
)
var supportTopDriveFlags = []cli.Flag{
cli.IntFlag{
Name: "count, c",
Usage: "show up to N drives",
Value: 10,
},
}
var supportTopDriveCmd = cli.Command{
Name: "drive",
Aliases: []string{"disk"},
HiddenAliases: true,
Usage: "show real-time drive metrics",
Action: mainSupportTopDrive,
OnUsageError: onUsageError,
Before: setGlobalsFromContext,
Flags: append(supportTopDriveFlags, supportGlobalFlags...),
HideHelpCommand: true,
CustomHelpTemplate: `NAME:
{{.HelpName}} - {{.Usage}}
USAGE:
{{.HelpName}} [FLAGS] TARGET
FLAGS:
{{range .VisibleFlags}}{{.}}
{{end}}
EXAMPLES:
1. Display drive metrics
{{.Prompt}} {{.HelpName}} myminio/
`,
}
// checkSupportTopDriveSyntax - validate all the passed arguments
func checkSupportTopDriveSyntax(ctx *cli.Context) {
if len(ctx.Args()) == 0 || len(ctx.Args()) > 1 {
showCommandHelpAndExit(ctx, 1) // last argument is exit code
}
}
func mainSupportTopDrive(ctx *cli.Context) error {
checkSupportTopDriveSyntax(ctx)
aliasedURL := ctx.Args().Get(0)
alias, _ := url2Alias(aliasedURL)
validateClusterRegistered(alias, false)
// Create a new MinIO Admin Client
client, err := newAdminClient(aliasedURL)
if err != nil {
fatalIf(err.Trace(aliasedURL), "Unable to initialize admin client.")
return nil
}
ctxt, cancel := context.WithCancel(globalContext)
defer cancel()
info, e := client.ServerInfo(ctxt)
fatalIf(probe.NewError(e).Trace(aliasedURL), "Unable to initialize admin client.")
var disks []madmin.Disk
for _, srv := range info.Servers {
disks = append(disks, srv.Disks...)
}
// MetricsOptions are options provided to Metrics call.
opts := madmin.MetricsOptions{
Type: madmin.MetricsDisk,
Interval: time.Second,
ByDisk: true,
}
p := tea.NewProgram(initTopDriveUI(disks, ctx.Int("count")))
go func() {
out := func(m madmin.RealtimeMetrics) {
for name, metric := range m.ByDisk {
p.Send(topDriveResult{
diskName: name,
stats: metric.IOStats,
})
}
}
e := client.Metrics(ctxt, opts, out)
if e != nil {
fatalIf(probe.NewError(e), "Unable to fetch top drives events")
}
}()
if _, e := p.Run(); e != nil {
cancel()
fatalIf(probe.NewError(e).Trace(aliasedURL), "Unable to fetch top drive events")
}
return nil
}