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configMapsStore.go
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/
configMapsStore.go
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/*
Copyright paskal.maksim@gmail.com
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 configmapsstore
import (
"context"
"fmt"
"strings"
"sync"
"time"
"github.com/maksim-paskal/envoy-control-plane/pkg/config"
"github.com/maksim-paskal/envoy-control-plane/pkg/configstore"
"github.com/maksim-paskal/envoy-control-plane/pkg/controlplane"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
)
var mutex sync.Mutex
func checkConfigMapLabels(cm *v1.ConfigMap) bool {
// if config has exact names, it only loads them
if len(*config.Get().ConfigMapNames) != 0 {
for _, name := range strings.Split(*config.Get().ConfigMapNames, ",") {
if cm.Name == name {
return true
}
}
return false
}
label := strings.Split(*config.Get().ConfigMapLabels, "=")
return (cm.Labels[label[0]] == label[1])
}
func NewConfigMap(ctx context.Context, cm *v1.ConfigMap) error {
if !checkConfigMapLabels(cm) {
return nil
}
mutex.Lock()
defer mutex.Unlock()
for nodeID, text := range cm.Data {
config, err := config.ParseConfigYaml(nodeID, text, nil)
if err != nil {
return err
}
if len(config.ID) == 0 {
config.ID = nodeID
}
if len(config.Name) == 0 {
config.Name = config.ID
}
config.ConfigMapName = cm.Name
config.ConfigMapNamespace = cm.Namespace
config.ConfigMapAnnotations = cm.Annotations
if config.UseVersionLabel && len(cm.Labels[config.VersionLabelKey]) > 0 {
log.Debug("update Id, using UseVersionLabel")
config.VersionLabel = cm.Labels[config.VersionLabelKey]
config.ID = fmt.Sprintf("%s-%s", config.ID, config.VersionLabel)
}
for i := 0; i < len(config.Kubernetes); i++ {
if len(config.Kubernetes[i].Namespace) == 0 {
log.Debug("namespace not set - using configmap namespace")
config.Kubernetes[i].Namespace = cm.Namespace
}
}
if v, ok := configstore.StoreMap.Load(config.ID); ok {
cs, ok := v.(*configstore.ConfigStore)
if !ok {
return errAssertion
}
cs.Stop()
}
if err := config.SaveResources(); err != nil {
return errors.Wrap(err, "error in config.SaveResources")
}
log.Infof("Create configStore %s", config.ID)
newConfigStore, err := configstore.New(ctx, config)
if err != nil {
return err
}
configstore.StoreMap.Store(config.ID, newConfigStore)
}
return nil
}
func DeleteConfigMap(cm *v1.ConfigMap) {
configstore.StoreMap.Range(func(key interface{}, value interface{}) bool {
cs, ok := value.(*configstore.ConfigStore)
if !ok {
log.WithError(errAssertion).Fatal("DeleteConfigMap v.(*ConfigStore)")
}
if cs.Config.ConfigMapName == cm.Name && cs.Config.ConfigMapNamespace == cm.Namespace {
cs.Stop()
time.Sleep(*config.Get().ConfigDrainPeriod)
controlplane.SnapshotCache.ClearSnapshot(cs.Config.ID)
configstore.StoreMap.Delete(key)
}
return true
})
}