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Copy pathcallhome.go
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136 lines (117 loc) · 3.87 KB
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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"
"fmt"
"math/rand"
"time"
"github.com/minio/madmin-go"
"github.com/minio/minio/internal/logger"
uatomic "go.uber.org/atomic"
)
const (
// callhomeSchemaVersion1 is callhome schema version 1
callhomeSchemaVersion1 = "1"
// callhomeSchemaVersion is current callhome schema version.
callhomeSchemaVersion = callhomeSchemaVersion1
// callhomeCycleDefault is the default interval between two callhome cycles (24hrs)
callhomeCycleDefault = 24 * time.Hour
)
// CallhomeInfo - Contains callhome information
type CallhomeInfo struct {
SchemaVersion string `json:"schema_version"`
AdminInfo madmin.InfoMessage `json:"admin_info"`
}
var (
enableCallhome = uatomic.NewBool(false)
callhomeLeaderLockTimeout = newDynamicTimeout(30*time.Second, 10*time.Second)
callhomeFreq = uatomic.NewDuration(callhomeCycleDefault)
)
func updateCallhomeParams(ctx context.Context, objAPI ObjectLayer) {
alreadyEnabled := enableCallhome.Load()
enableCallhome.Store(globalCallhomeConfig.Enable)
callhomeFreq.Store(globalCallhomeConfig.Frequency)
// If callhome was disabled earlier and has now been enabled,
// initialize the callhome process again.
if !alreadyEnabled && enableCallhome.Load() {
initCallhome(ctx, objAPI)
}
}
// initCallhome will start the callhome task in the background.
func initCallhome(ctx context.Context, objAPI ObjectLayer) {
go func() {
r := rand.New(rand.NewSource(time.Now().UnixNano()))
// Leader node (that successfully acquires the lock inside runCallhome)
// will keep performing the callhome. If the leader goes down for some reason,
// the lock will be released and another node will acquire it and take over
// because of this loop.
for {
runCallhome(ctx, objAPI)
if !enableCallhome.Load() {
return
}
// callhome running on a different node.
// sleep for some time and try again.<
6282
/div>
duration := time.Duration(r.Float64() * float64(callhomeFreq.Load()))
if duration < time.Second {
// Make sure to sleep atleast a second to avoid high CPU ticks.
duration = time.Second
}
time.Sleep(duration)
if !enableCallhome.Load() {
return
}
}
}()
}
func runCallhome(ctx context.Context, objAPI ObjectLayer) {
// Make sure only 1 callhome is running on the cluster.
locker := objAPI.NewNSLock(minioMetaBucket, "callhome/runCallhome.lock")
lkctx, err := locker.GetLock(ctx, callhomeLeaderLockTimeout)
if err != nil {
return
}
ctx = lkctx.Context()
defer locker.Unlock(lkctx.Cancel)
callhomeTimer := time.NewTimer(callhomeFreq.Load())
defer callhomeTimer.Stop()
for {
select {
case <-ctx.Done():
return
case <-callhomeTimer.C:
if !enableCallhome.Load() {
// Stop the processing as callhome got disabled
return
}
performCallhome(ctx)
// Reset the timer for next cycle.
callhomeTimer.Reset(callhomeFreq.Load())
}
}
}
func performCallhome(ctx context.Context) {
err := sendCallhomeInfo(
CallhomeInfo{
SchemaVersion: callhomeSchemaVersion,
AdminInfo: getServerInfo(ctx, nil),
})
if err != nil {
logger.LogIf(ctx, fmt.Errorf("Unable to perform callhome: %w", err))
}
}