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Copy pathcallhome.go
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196 lines (164 loc) · 5.1 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 (
"bytes"
"compress/gzip"
"context"
"encoding/json"
"errors"
"fmt"
"math/rand"
"net/url"
"time"
"github.com/minio/madmin-go/v3"
"github.com/minio/minio/internal/logger"
)
var callhomeLeaderLockTimeout = newDynamicTimeout(30*time.Second, 10*time.Second)
// initCallhome will start the callhome task in the background.
func initCallhome(ctx context.Context, objAPI ObjectLayer) {
if !globalCallhomeConfig.Enabled() {
return
}
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 {
if !globalCallhomeConfig.Enabled() {
return
}
if !runCallhome(ctx, objAPI) {
// callhome was disabled or context was ca
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nceled
return
}
// callhome running on a different node.
// sleep for some time and try again.
duration := time.Duration(r.Float64() * float64(globalCallhomeConfig.FrequencyDur()))
if duration < time.Second {
// Make sure to sleep atleast a second to avoid high CPU ticks.
duration = time.Second
}
time.Sleep(duration)
}
}()
}
func runCallhome(ctx context.Context, objAPI ObjectLayer) bool {
// 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 {
// lock timedout means some other node is the leader,
// cycle back return 'true'
return true
}
ctx = lkctx.Context()
defer locker.Unlock(lkctx)
callhomeTimer := time.NewTimer(globalCallhomeConfig.FrequencyDur())
defer callhomeTimer.Stop()
for {
if !globalCallhomeConfig.Enabled() {
// Stop the processing as callhome got disabled
return false
}
select {
case <-ctx.Done():
// indicates that we do not need to run callhome anymore
return false
case <-callhomeTimer.C:
if !globalCallhomeConfig.Enabled() {
// Stop the processing as callhome got disabled
return false
}
performCallhome(ctx)
// Reset the timer for next cycle.
callhomeTimer.Reset(globalCallhomeConfig.FrequencyDur())
}
}
}
func performCallhome(ctx context.Context) {
deadline := 10 * time.Second // Default deadline is 10secs for callhome
objectAPI := newObjectLayerFn()
if objectAPI == nil {
logger.LogIf(ctx, errors.New("Callhome: object layer not ready"))
return
}
healthCtx, healthCancel := context.WithTimeout(ctx, deadline)
defer healthCancel()
healthInfoCh := make(chan madmin.HealthInfo)
query := url.Values{}
for _, k := range madmin.HealthDataTypesList {
query.Set(string(k), "true")
}
healthInfo := madmin.HealthInfo{
TimeStamp: time.Now().UTC(),
Version: madmin.HealthInfoVersion,
Minio: madmin.MinioHealthInfo{
Info: madmin.MinioInfo{
DeploymentID: globalDeploymentID(),
},
},
}
go fetchHealthInfo(healthCtx, objectAPI, &query, healthInfoCh, healthInfo)
for {
select {
case hi, hasMore := <-healthInfoCh:
if !hasMore {
// Received all data. Send to SUBNET and return
err := sendHealthInfo(ctx, healthInfo)
if err != nil {
logger.LogIf(ctx, fmt.Errorf("Unable to perform callhome: %w", err))
}
return
}
healthInfo = hi
case <-healthCtx.Done():
return
}
}
}
const (
subnetHealthPath = "/api/health/upload"
)
func sendHealthInfo(ctx context.Context, healthInfo madmin.HealthInfo) error {
url := globalSubnetConfig.BaseURL + subnetHealthPath
filename := fmt.Sprintf("health_%s.json.gz", UTCNow().Format("20060102150405"))
url += "?filename=" + filename
_, err := globalSubnetConfig.Upload(url, filename, createHealthJSONGzip(ctx, healthInfo))
return err
}
func createHealthJSONGzip(ctx context.Context, healthInfo madmin.HealthInfo) []byte {
var b bytes.Buffer
gzWriter := gzip.NewWrite
41FA
r(&b)
header := struct {
Version string `json:"version"`
}{Version: healthInfo.Version}
enc := json.NewEncoder(gzWriter)
if e := enc.Encode(header); e != nil {
logger.LogIf(ctx, fmt.Errorf("Could not encode health info header: %w", e))
return nil
}
if e := enc.Encode(healthInfo); e != nil {
logger.LogIf(ctx, fmt.Errorf("Could not encode health info: %w", e))
return nil
}
gzWriter.Flush()
gzWriter.Close()
return b.Bytes()
}