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identity_gc.go
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identity_gc.go
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// Copyright 2018-2020 Authors of Cilium
//
// 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 main
import (
"time"
operatorOption "github.com/cilium/cilium/operator/option"
"github.com/cilium/cilium/pkg/allocator"
"github.com/cilium/cilium/pkg/identity/cache"
"github.com/cilium/cilium/pkg/kvstore"
kvstoreallocator "github.com/cilium/cilium/pkg/kvstore/allocator"
"github.com/sirupsen/logrus"
)
func startKvstoreIdentityGC() {
log.Infof("Starting kvstore identity garbage collector with %s interval...", operatorOption.Config.IdentityGCInterval)
backend, err := kvstoreallocator.NewKVStoreBackend(cache.IdentitiesPath, "", nil, kvstore.Client())
if err != nil {
log.WithError(err).Fatal("Unable to initialize kvstore backend for identity allocation")
}
a := allocator.NewAllocatorForGC(backend)
keysToDelete := map[string]uint64{}
go func() {
for {
keysToDelete2, err := a.RunGC(identityRateLimiter, keysToDelete)
if err != nil {
log.WithError(err).Warning("Unable to run security identity garbage collector")
} else {
keysToDelete = keysToDelete2
}
<-time.After(operatorOption.Config.IdentityGCInterval)
log.WithFields(logrus.Fields{
"identities-to-delete": keysToDelete,
}).Debug("Will delete identities if they are still unused")
}
}()
}