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node-feature-discovery/pkg/nfd-master/node-updater-pool.go
Markus Lehtonen 039378c725 nfd-master: use term node update instead of labeling
Rename symbols and reword log messages to correlate with the
functionality (we may do other updates than just modify labels
nowadays).
2023-08-01 16:42:34 +03:00

98 lines
2.3 KiB
Go

/*
Copyright 2023 The Kubernetes Authors.
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 nfdmaster
import (
"sync"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog/v2"
)
type nodeUpdaterPool struct {
queue workqueue.RateLimitingInterface
sync.Mutex
wg sync.WaitGroup
nfdMaster *nfdMaster
}
func newNodeUpdaterPool(nfdMaster *nfdMaster) *nodeUpdaterPool {
return &nodeUpdaterPool{
nfdMaster: nfdMaster,
wg: sync.WaitGroup{},
}
}
func (u *nodeUpdaterPool) processNodeUpdateRequest(queue workqueue.RateLimitingInterface) bool {
nodeName, quit := queue.Get()
if quit {
return false
}
defer queue.Done(nodeName)
if err := u.nfdMaster.nfdAPIUpdateOneNode(nodeName.(string)); err != nil {
if queue.NumRequeues(nodeName) < 5 {
klog.InfoS("retrying node update", "nodeName", nodeName)
queue.AddRateLimited(nodeName)
return true
} else {
klog.ErrorS(err, "failed to update node", "nodeName", nodeName)
}
}
queue.Forget(nodeName)
return true
}
func (u *nodeUpdaterPool) runNodeUpdater(queue workqueue.RateLimitingInterface) {
for u.processNodeUpdateRequest(queue) {
}
u.wg.Done()
}
func (u *nodeUpdaterPool) start(parallelism int) {
u.Lock()
defer u.Unlock()
if u.queue != nil && !u.queue.ShuttingDown() {
klog.InfoS("the NFD master node updater pool is already running.")
return
}
klog.InfoS("starting the NFD master node updater pool", "parallelism", parallelism)
u.queue = workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter())
for i := 0; i < parallelism; i++ {
u.wg.Add(1)
go u.runNodeUpdater(u.queue)
}
}
func (u *nodeUpdaterPool) stop() {
u.Lock()
defer u.Unlock()
if u.queue == nil || u.queue.ShuttingDown() {
klog.InfoS("the NFD master node updater pool is not running.")
return
}
klog.InfoS("stopping the NFD master node updater pool")
u.queue.ShutDown()
u.wg.Wait()
}