forked from minio/mc
/
ready.go
154 lines (133 loc) · 4.25 KB
/
ready.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"
"github.com/fatih/color"
"github.com/minio/cli"
json "github.com/minio/colorjson"
"github.com/trinet2005/oss-admin-go"
"github.com/trinet2005/oss-mc/pkg/probe"
)
const (
healthCheckInterval = 5 * time.Second
)
var readyFlags = []cli.Flag{
cli.BoolFlag{
Name: "cluster-read",
Usage: "check if the cluster has enough read quorum",
},
cli.BoolFlag{
Name: "maintenance",
Usage: "check if the cluster is taken down for maintenance",
},
}
// Checks if the cluster is ready or not
var readyCmd = cli.Command{
Name: "ready",
Usage: "checks if the cluster is ready or not",
Action: mainReady,
OnUsageError: onUsageError,
Before: setGlobalsFromContext,
Flags: append(readyFlags, globalFlags...),
CustomHelpTemplate: `NAME:
{{.HelpName}} - {{.Usage}}
USAGE:
{{.HelpName}} [FLAGS] TARGET
{{if .VisibleFlags}}
FLAGS:
{{range .VisibleFlags}}{{.}}
{{end}}{{end}}
EXAMPLES:
1. Check if the cluster is ready or not
{{.Prompt}} {{.HelpName}} myminio
2. Check if the cluster has enough read quorum
{{.Prompt}} {{.HelpName}} myminio --cluster-read
3. Check if the cluster is taken down for maintenance
{{.Prompt}} {{.HelpName}} myminio --maintenance
`,
}
type readyMessage struct {
Healthy bool `json:"healthy"`
MaintenanceMode bool `json:"maintenanceMode"`
WriteQuorum int `json:"writeQuorum"`
HealingDrives int `json:"healingDrives"`
}
func (r readyMessage) String() string {
if r.Healthy {
return color.GreenString("The cluster is ready")
}
return color.RedString("The cluster is not ready")
}
// JSON jsonified ready result
func (r readyMessage) JSON() string {
jsonMessageBytes, e := json.MarshalIndent(r, "", " ")
fatalIf(probe.NewError(e), "Unable to marshal into JSON.")
return string(jsonMessageBytes)
}
// mainReady - main handler for mc ready command.
func mainReady(cliCtx *cli.Context) error {
if !cliCtx.Args().Present() {
exitCode := 1
showCommandHelpAndExit(cliCtx, exitCode)
}
// Set command flags from context.
clusterRead := cliCtx.Bool("cluster-read")
maintenance := cliCtx.Bool("maintenance")
ctx, cancelClusterReady := context.WithCancel(globalContext)
defer cancelClusterReady()
aliasedURL := cliCtx.Args().Get(0)
anonClient, err := newAnonymousClient(aliasedURL)
fatalIf(err.Trace(aliasedURL), "Couldn't construct anonymous client for `"+aliasedURL+"`.")
healthOpts := madmin.HealthOpts{
ClusterRead: clusterRead,
Maintenance: maintenance,
}
healthResult, hErr := anonClient.Healthy(ctx, healthOpts)
fatalIf(probe.NewError(hErr).Trace(aliasedURL), "Couldn't get the health status for `"+aliasedURL+"`.")
if healthResult.Healthy {
printMsg(readyMessage{
Healthy: healthResult.Healthy,
MaintenanceMode: healthResult.MaintenanceMode,
WriteQuorum: healthResult.WriteQuorum,
HealingDrives: healthResult.HealingDrives,
})
return nil
}
timer := time.NewTimer(healthCheckInterval)
defer timer.Stop()
for {
select {
case <-ctx.Done():
return nil
case <-timer.C:
healthResult, hErr := anonClient.Healthy(ctx, healthOpts)
fatalIf(probe.NewError(hErr).Trace(aliasedURL), "Couldn't get the health status for `"+aliasedURL+"`.")
printMsg(readyMessage{
Healthy: healthResult.Healthy,
MaintenanceMode: healthResult.MaintenanceMode,
WriteQuorum: healthResult.WriteQuorum,
HealingDrives: healthResult.HealingDrives,
})
if healthResult.Healthy {
return nil
}
timer.Reset(healthCheckInterval)
}
}
}