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reorg.go
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/
reorg.go
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/*
* Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* 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 loadbalancer
import (
"context"
"k8s.io/klog"
"time"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
)
const maxPeriod = 30 * time.Minute
func (p *lbProvider) reorg(client clientcorev1.ServiceInterface, stop <-chan struct{}) {
timer := time.NewTimer(1 * time.Second)
lastErrNext := 0 * time.Second
for {
select {
case <-stop:
return
case <-timer.C:
var next time.Duration
err := p.doReorgStep(client)
if err == nil {
next = maxPeriod
lastErrNext = 0
} else {
klog.Warningf("reorg failed with %s", err)
if lastErrNext == 0 {
lastErrNext = 500 * time.Millisecond
} else {
lastErrNext = 5 * lastErrNext / 4
if lastErrNext > maxPeriod {
lastErrNext = maxPeriod
}
}
next = lastErrNext
}
timer.Reset(next)
}
}
}
func (p *lbProvider) doReorgStep(client clientcorev1.ServiceInterface) error {
klog.Infof("starting reorg...")
list, err := client.List(metav1.ListOptions{})
if err != nil {
return err
}
services := map[ObjectName]corev1.Service{}
for _, item := range list.Items {
if item.Spec.Type == corev1.ServiceTypeLoadBalancer {
services[objectNameFromService(&item)] = item
}
}
lbs := map[ObjectName]struct{}{}
servers, err := p.access.ListVirtualServers(ClusterName)
if err != nil {
return err
}
for _, server := range servers {
tag := getTag(server.Tags, ScopeService)
if tag != "" {
lbs[parseObjectName(tag)] = struct{}{}
}
}
pools, err := p.access.ListPools(ClusterName)
if err != nil {
return err
}
for _, pool := range pools {
tag := getTag(pool.Tags, ScopeService)
if tag != "" {
lbs[parseObjectName(tag)] = struct{}{}
}
}
monitors, err := p.access.ListTCPMonitorLight(ClusterName)
if err != nil {
return err
}
for _, pool := range monitors {
tag := getTag(pool.Tags, ScopeService)
if tag != "" {
lbs[parseObjectName(tag)] = struct{}{}
}
}
klog.Infof("reorg: %d existing services, artefacts for %d services", len(services), len(lbs))
for lb := range lbs {
if svc, ok := services[lb]; !ok || svc.Spec.Type != corev1.ServiceTypeLoadBalancer {
service := &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Namespace: lb.Namespace,
Name: lb.Name,
},
}
klog.Infof("deleting artefacts for non-existing service %s/%s", lb.Namespace, lb.Name)
err = p.EnsureLoadBalancerDeleted(context.TODO(), ClusterName, service)
if err != nil {
return err
}
}
}
return nil
}