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reconciler.go
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reconciler.go
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/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.,
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* Unless required by applicable law or agreed to in writing, software distributed under,
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
// Package reconciler xxx
package reconciler
import (
"context"
"encoding/json"
"fmt"
"strings"
"sync"
"time"
jump "github.com/lithammer/go-jump-consistent-hash"
"github.com/Tencent/bk-bcs/bcs-common/common/blog"
commtypes "github.com/Tencent/bk-bcs/bcs-common/common/types"
cmdb "github.com/Tencent/bk-bcs/bcs-common/pkg/esb/cmdbv3"
"github.com/Tencent/bk-bcs/bcs-services/bcs-bkcmdb-synchronizer/common"
"github.com/Tencent/bk-bcs/bcs-services/bcs-bkcmdb-synchronizer/storage"
)
const (
// SENDER_NUMBER default sender number for one reconciler
SENDER_NUMBER = 10
// QUEUE_LENGTH queue length for storage watch event queue
QUEUE_LENGTH = 10000
// FETCH_MODULES_INTERVAL interval for fetch biz modules from paas-cc
FETCH_MODULES_INTERVAL = 100
)
// Reconciler sync container data of one cluster to cmdb
type Reconciler struct {
// cluster info
clusterInfo common.Cluster
// cluster id
clusterID string
// cluster type, k8s or mesos
clusterType string
// resource type, pod or taskgroup
resType string
// map to cache cmdb module id
moduleIDMap map[string]int64
// block for moduleIDMap
moduleIDMapLock sync.Mutex
// resource event queue
queue chan PodEvent
// sender array
senders []*Sender
// sender lock, when locked, pod event will stay at event queue
sendersLock sync.Mutex
// storage client
storageClient storage.Interface
// cmdb client
cmdbClient cmdb.ClientInterface
// full sync interval
fullSyncInterval int64
}
// NewReconciler create new reconciler
func NewReconciler(clusterInfo common.Cluster, storageClient storage.Interface,
cmdbClient cmdb.ClientInterface, fullSyncInterval int64) (*Reconciler, error) {
clusterID := clusterInfo.ClusterID
// Create senders
var senders []*Sender
for i := 0; i < SENDER_NUMBER; i++ {
senders = append(senders, NewSender(clusterInfo, int64(i), QUEUE_LENGTH, cmdbClient))
}
// check cluster type from cluster id
// TODO: some cluster with special name won't work
var clusterType string
if strings.Contains(strings.ToLower(clusterID), common.ClusterTypeMesos) {
clusterType = common.ClusterTypeMesos
} else if strings.Contains(strings.ToLower(clusterID), common.ClusterTypeK8S) {
clusterType = common.ClusterTypeK8S
}
if len(clusterType) == 0 {
return nil, fmt.Errorf("invalid cluster type %s", clusterID)
}
resType := common.GetResTypeByClusterType(clusterType)
reconciler := &Reconciler{
clusterInfo: clusterInfo,
clusterID: clusterID,
clusterType: clusterType,
resType: resType,
senders: senders,
storageClient: storageClient,
cmdbClient: cmdbClient,
fullSyncInterval: fullSyncInterval,
moduleIDMap: make(map[string]int64),
queue: make(chan PodEvent, QUEUE_LENGTH),
}
// should fetch the related modules when new reconciler is created
if err := reconciler.fetchModules(); err != nil {
return nil, err
}
return reconciler, nil
}
func (r *Reconciler) hash(key string) int32 {
// hasher pod event to senders, to ensure the event order
return jump.HashString(key, SENDER_NUMBER, jump.NewCRC64())
}
// Run run reconciler
func (r *Reconciler) Run(ctx context.Context) {
for _, sender := range r.senders {
go sender.Run(ctx)
}
go r.fetchModulesLoop(ctx)
go r.transferLoop(ctx)
go r.watchLoop(ctx)
go r.fullSyncLoop(ctx)
select {
case <-ctx.Done():
blog.Infof("%s context done", r.logPre())
}
}
// logPre xxx
// log prefix for current reconciler
func (r *Reconciler) logPre() string {
return fmt.Sprintf("[reconciler:%s]", r.clusterInfo.ClusterID)
}
func (r *Reconciler) decodeK8SPod(data json.RawMessage) (*common.Pod, error) {
kPod := new(common.K8SPod)
err := json.Unmarshal(data, kPod)
if err != nil {
return nil, err
}
newPod, err := common.ConvertK8SPod(r.clusterID, kPod)
if err != nil {
blog.Errorf("%s ConvertK8SPod failed, err %s", r.logPre(), err.Error())
return nil, err
}
newPod.PodCluster = r.clusterInfo.ClusterID
// get pod annotations for bk cmdb
// if there is no annotations for bk cmdb, save pod into default cmdb module bkbcs/bkbcs
setName, okSet := kPod.ObjectMeta.Annotations[common.BCS_BKCMDB_ANNOTATIONS_SET_KEY]
moduleName, okModule := kPod.ObjectMeta.Annotations[common.BCS_BKCMDB_ANNOTATIONS_MODULE_KEY]
findModuleFlag := false
if okSet && okModule {
r.moduleIDMapLock.Lock()
moduleID, ok := r.moduleIDMap[setName+"."+moduleName]
r.moduleIDMapLock.Unlock()
if ok {
findModuleFlag = true
newPod.ModuleID = moduleID
}
}
if !findModuleFlag {
r.moduleIDMapLock.Lock()
moduleID, ok := r.moduleIDMap[common.BCS_BKCMDB_DEFAULT_SET_NAME+"."+common.BCS_BKCMDB_DEFAULT_MODLUE_NAME]
r.moduleIDMapLock.Unlock()
if ok {
newPod.ModuleID = moduleID
} else {
blog.Warnf("%s no default set and module for bkbcs", r.logPre())
return nil, fmt.Errorf("%s no default set and module for bkbcs", r.logPre())
}
}
return newPod, nil
}
func (r *Reconciler) decodeMesosTaskgroup(data json.RawMessage) (*common.Pod, error) {
taskgroup := new(commtypes.BcsPodStatus)
err := json.Unmarshal(data, taskgroup)
if err != nil {
return nil, err
}
newPod, err := common.ConvertMesosPod(taskgroup)
if err != nil {
blog.Errorf("%s ConvertMesosPod failed, err %s", r.logPre(), err.Error())
return nil, err
}
newPod.PodCluster = r.clusterInfo.ClusterID
// get pod annotations for bk cmdb
// if there is no annotations for bk cmdb, save pod into default cmdb module bkbcs/bkbcs
setName, okSet := taskgroup.Annotations["set.bkcmdb.bkbcs.tencent.com"]
moduleName, okModule := taskgroup.Annotations["module.bkcmdb.bkbcs.tencent.com"]
findModuleFlag := false
if okSet && okModule {
r.moduleIDMapLock.Lock()
moduleID, ok := r.moduleIDMap[setName+"."+moduleName]
r.moduleIDMapLock.Unlock()
if ok {
findModuleFlag = true
newPod.ModuleID = moduleID
}
}
if !findModuleFlag {
r.moduleIDMapLock.Lock()
moduleID, ok := r.moduleIDMap[common.BCS_BKCMDB_DEFAULT_SET_NAME+"."+common.BCS_BKCMDB_DEFAULT_MODLUE_NAME]
r.moduleIDMapLock.Unlock()
if ok {
newPod.ModuleID = moduleID
} else {
blog.Warnf("%s no default set and module for bkbcs", r.logPre())
return nil, fmt.Errorf("%s no default set and module for bkbcs", r.logPre())
}
}
return newPod, nil
}
func (r *Reconciler) decodeCmdbPod(data json.RawMessage) (*common.Pod, error) {
pod := new(common.Pod)
err := json.Unmarshal(data, pod)
if err != nil {
blog.Errorf("%s Unmarshal cmdb pod %+v failed, err %s", r.logPre(), data, err.Error())
return nil, err
}
return pod, nil
}
func (r *Reconciler) decodeStorageResource(data json.RawMessage) (*common.Pod, error) {
var err error
var pod *common.Pod
switch r.resType {
case common.ResourceTypePod:
pod, err = r.decodeK8SPod(data)
if err != nil {
return nil, err
}
case common.ResourceTypeTaskgroup:
pod, err = r.decodeMesosTaskgroup(data)
if err != nil {
return nil, err
}
}
pod.BizID = r.clusterInfo.BizID
return pod, nil
}
func (r *Reconciler) fetchModules() error {
result, err := r.cmdbClient.SearchBusinessTopoWithStatistics(r.clusterInfo.BizID)
if err != nil {
blog.Errorf("%s fetch biz module ids failed, err %s", r.logPre(), err.Error())
return fmt.Errorf("%s fetch biz module ids failed, err %s", r.logPre(), err.Error())
}
if !result.Result {
blog.Errorf("%s fetch biz module failed, resp %#v", r.logPre(), result)
return fmt.Errorf("%s fetch biz module failed, resp %#v", r.logPre(), result)
}
moduleIDMap := make(map[string]int64)
for _, bkBiz := range result.Data {
for _, bkSet := range bkBiz.Child {
for _, bkModule := range bkSet.Child {
moduleIDMap[bkSet.InstName+"."+bkModule.InstName] = bkModule.InstID
}
}
}
r.moduleIDMapLock.Lock()
r.moduleIDMap = moduleIDMap
r.moduleIDMapLock.Unlock()
return nil
}
func (r *Reconciler) fetchModulesLoop(ctx context.Context) error {
ticker := time.NewTicker(FETCH_MODULES_INTERVAL * time.Second)
for {
select {
case <-ticker.C:
if err := r.fetchModules(); err != nil {
blog.Errorf("%s fetchModules, err %s", r.logPre(), err.Error())
}
case <-ctx.Done():
blog.Infof("%s context done, stop fetch modules loop", r.logPre())
return nil
}
}
}
func (r *Reconciler) doCompare() error {
resourcesData, err := r.storageClient.ListResources(r.clusterType, r.clusterID, r.resType)
if err != nil {
return fmt.Errorf("%s list storage resources failed, err %s", r.logPre(), err.Error())
}
storagePods := make(map[string]*common.Pod)
for _, data := range resourcesData.Data {
pod, err := r.decodeStorageResource(data.Data)
if err != nil {
return err
}
storagePods[pod.PodUUID] = pod
}
cmdbRes, err := r.cmdbClient.ListClusterPods(r.clusterInfo.BizID, r.clusterID)
cmdbPods := make(map[string]*common.Pod)
for _, data := range cmdbRes.Data.Info {
pod, err := r.decodeCmdbPod(data)
if err != nil {
return err
}
cmdbPods[pod.PodUUID] = pod
}
adds, updates, dels := common.GetDiffPods(cmdbPods, storagePods)
for _, add := range adds {
blog.Info("%s full sync event %d, pod %s", r.logPre(), EventAdd, add.MetadataString())
index := r.hash(add.PodUUID)
r.senders[index].Push(PodEvent{
Type: EventAdd,
Pod: add,
})
}
for _, update := range updates {
blog.Info("%s full sync event %d, pod %s", r.logPre(), EventUpdate, update.MetadataString())
index := r.hash(update.PodUUID)
r.senders[index].Push(PodEvent{
Type: EventUpdate,
Pod: update,
})
}
for _, del := range dels {
blog.Info("%s full sync event %d, pod %s", r.logPre(), EventDel, del.MetadataString())
index := r.hash(del.PodUUID)
r.senders[index].Push(PodEvent{
Type: EventDel,
Pod: del,
})
}
return nil
}
// fullSyncLoop full sync loop
func (r *Reconciler) fullSyncLoop(ctx context.Context) {
// lock event queue
r.sendersLock.Lock()
// sync all pods event to sync queue
err := r.doCompare()
// unlock event queue
r.sendersLock.Unlock()
if err != nil {
blog.Warnf("%s do compare failed, err %s", r.logPre(), err.Error())
}
ticker := time.NewTicker(time.Duration(r.fullSyncInterval) * time.Second)
for {
select {
case <-ticker.C:
// lock event queue
r.sendersLock.Lock()
// sync all pods event to sync queue
err := r.doCompare()
// unlock event queue
r.sendersLock.Unlock()
if err != nil {
blog.Warnf("%s do compare failed, err %s", r.logPre(), err.Error())
}
case <-ctx.Done():
blog.Infof("%s reconciler %s context done, stop full sync loop", r.logPre(), r.clusterID)
return
}
}
}
// transferLoop sync loop
func (r *Reconciler) transferLoop(ctx context.Context) {
for {
select {
case e := <-r.queue:
blog.Infof("%s watch event: %d, pod: %s", r.logPre(), e.Type, e.Pod.MetadataString())
index := r.hash(e.Pod.PodUUID)
r.sendersLock.Lock()
r.senders[index].Push(e)
r.sendersLock.Unlock()
case <-ctx.Done():
blog.Infof("%s context done, stop transfer loop", r.logPre())
return
}
}
}
// watchLoop loop for watch storage
func (r *Reconciler) watchLoop(ctx context.Context) {
ch, err := r.storageClient.WatchClusterResources(r.clusterID, r.resType)
if err != nil {
blog.Warnf("%s watch cluster %s failed, err %s", r.logPre(), r.clusterID, err.Error())
time.Sleep(2 * time.Second)
go r.watchLoop(ctx)
return
}
for {
select {
case e := <-ch:
newEvent := PodEvent{}
switch e.Type {
case common.Add:
pod, err := r.decodeStorageResource(e.Value.Data)
if err != nil {
blog.Warnf("%s decode storage resource failed, err %s", r.logPre(), err.Error())
continue
}
newEvent.Type = EventAdd
newEvent.Pod = pod
r.queue <- newEvent
case common.Chg:
pod, err := r.decodeStorageResource(e.Value.Data)
if err != nil {
blog.Warnf("%s decode storage resource failed, err %s", r.logPre(), err.Error())
continue
}
newEvent.Type = EventUpdate
newEvent.Pod = pod
r.queue <- newEvent
case common.Del:
pod, err := r.decodeStorageResource(e.Value.Data)
if err != nil {
blog.Warnf("%s decode storage resource failed, err %s", r.logPre(), err.Error())
continue
}
newEvent.Type = EventDel
newEvent.Pod = pod
r.queue <- newEvent
case common.Brk:
blog.Warnf("%s recv Brk event from storage", r.logPre())
go r.watchLoop(ctx)
return
}
r.queue <- newEvent
case <-ctx.Done():
blog.Infof("%s context done, stop watch loop", r.logPre())
return
}
}
}