/
processor.go
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/
processor.go
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/*
* Copyright 2022 Huawei Cloud Computing Technologies Co., Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 processor
import (
"errors"
"fmt"
"time"
"github.com/beego/beego/v2/client/orm"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog/v2"
"github.com/kappital/kappital/pkg/handler"
"github.com/kappital/kappital/pkg/models"
"github.com/kappital/kappital/pkg/resource"
"github.com/kappital/kappital/pkg/watcher"
)
const (
retryInterval = 5 * time.Second
// LongestDurationForProcess defines the timeout interval for asynchronous event processing
LongestDurationForProcess = 20 * time.Minute
)
// Processor the struct of process attribute
type Processor struct {
workQueue workqueue.RateLimitingInterface
workers int
resource resource.IResource
handler handler.IHandler
processName string
processorObject interface{}
careStatusSet sets.String
}
// NewProcessor return the entity object of process
func NewProcessor(name string, processorObj interface{}, handlerType handler.Type, resourceType resource.Type,
workerCounts int, actionSets sets.String) *Processor {
return &Processor{
workers: workerCounts,
workQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(),
fmt.Sprintf("%s-processor", name)),
resource: resource.GetResourceByType(resourceType),
handler: handler.GetHandlerByType(handlerType),
processName: name,
processorObject: processorObj,
careStatusSet: actionSets,
}
}
// ProcessType return the process name
func (p *Processor) ProcessType() string {
return p.processName
}
// ProcessObject return the object of process
func (p *Processor) ProcessObject() interface{} {
return p.processorObject
}
// Run start to run process
func (p *Processor) Run(stopCh <-chan struct{}) {
defer p.workQueue.ShutDown()
klog.Infof("Starting %s processor", p.processName)
defer klog.Infof("Shutting down %s processor", p.processName)
for i := 0; i < p.workers; i++ {
go wait.Until(p.sync, 0, stopCh)
}
<-stopCh
}
func (p *Processor) sync() {
key, quit := p.workQueue.Get()
if quit {
klog.V(3).Infof("quit syncing work queue")
return
}
defer p.workQueue.Done(key)
retry, err := p.syncHandler(key.(string))
if err != nil {
klog.Errorf("Error processing %s %s: %s", p.processName, key, err.Error())
}
if retry {
p.workQueue.AddAfter(key, retryInterval)
}
}
func (p *Processor) syncHandler(name string) (retry bool, err error) {
obj, err := p.resource.GetCommonDBObject(name)
if err != nil {
return !errors.Is(err, orm.ErrNoRows), err
}
status := p.resource.GetObjectStatus(obj)
defer func() {
if !retry {
// reset process timeout when retry false, error nil
innerErr := p.resource.UpdateObjProcessTime(obj, time.Time{})
if innerErr != nil {
retry = true
err = innerErr
return
}
return
}
// check handle timeout
if !p.subProcessTimeout(obj) {
return
}
errMsg := ""
if err != nil {
errMsg = err.Error()
}
innerErr := p.resource.UpdateProcessFailed(obj, getFailedStatus(status),
fmt.Sprintf("timeout to handle resource %s, status %s, last error: %s",
p.resource.GetResourceType(), p.resource.GetObjectStatus(obj), errMsg))
if innerErr != nil {
retry = true
err = innerErr
return
}
retry = false
err = fmt.Errorf("timeout to handle resource %s, status %s, last error:%s",
p.resource.GetResourceType(), p.resource.GetObjectStatus(obj), errMsg)
}()
if p.careStatusSet.Has(status) {
switch status {
case models.StatusDeleting:
return processStatus(obj, []func(interface{}) (bool, error){p.handler.BeforeDelete,
p.handler.Delete, p.handler.AfterDelete})
case models.StatusUpgrading, models.StatusRollingBack:
return processStatus(obj, []func(interface{}) (bool, error){p.handler.BeforeUpgrade,
p.handler.Upgrade, p.handler.AfterUpgrade})
case models.StatusInstalling, models.StatusInitializing:
return processStatus(obj, []func(interface{}) (bool, error){p.handler.BeforeInstall,
p.handler.Install, p.handler.AfterInstall})
}
}
return false, nil
}
func (p *Processor) subProcessTimeout(obj interface{}) bool {
if time.Now().UTC().After(p.resource.GetObjUpdateTime(obj).Add(LongestDurationForProcess)) {
return true
}
if p.resource.GetObjectProcessTime(obj).IsZero() {
return false
}
return time.Now().After(p.resource.GetObjectProcessTime(obj))
}
func getFailedStatus(status string) string {
switch status {
case models.StatusDeleting:
return models.StatusDeleteFailed
case models.StatusUpgrading:
return models.StatusUpgradeFailed
case models.StatusRollingBack:
return models.StatusRollBackFailed
default:
return models.StatusFailed
}
}
// Process implements watcher.Processor interface
func (p *Processor) Process(opType string, obj interface{}) {
switch opType {
case watcher.OPList, watcher.OPCreate:
fallthrough
case watcher.OPUpdate, watcher.OPDelete:
if p.careStatusSet.Has(p.resource.GetObjectStatus(obj)) {
p.workQueue.Add(p.resource.GetObjectID(obj))
}
}
}
// List implements watcher.Processor interface
func (p *Processor) List() ([]interface{}, error) {
res, err := p.resource.GetObjectListByStatusSets(p.careStatusSet)
if err != nil {
klog.Errorf("list %s objects failed, error: %v", p.processName, err)
}
return res, nil
}
func processStatus(obj interface{}, funcs []func(interface{}) (bool, error)) (bool, error) {
for _, f := range funcs {
retry, err := f(obj)
if err != nil || retry {
return retry, err
}
}
return false, nil
}