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/*
* Copyright 2020 Intel Corporation, Inc
*
* 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 status
import (
"encoding/json"
"fmt"
"sync"
pkgerrors "github.com/pkg/errors"
"github.com/sirupsen/logrus"
v1alpha1 "github.com/onap/multicloud-k8s/src/monitor/pkg/apis/k8splugin/v1alpha1"
clientset "github.com/onap/multicloud-k8s/src/monitor/pkg/generated/clientset/versioned"
informers "github.com/onap/multicloud-k8s/src/monitor/pkg/generated/informers/externalversions"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/clientcmd"
)
type channelManager struct {
channels map[string]chan struct{}
sync.Mutex
}
var channelData channelManager
const monitorLabel = "emco/deployment-id"
// HandleStatusUpdate for an application in a cluster
// TODO: Add code for specific handling
func HandleStatusUpdate(provider, name string, id string, v *v1alpha1.ResourceBundleState) error {
logrus.Info("label::", id)
//status := v.Status.ServiceStatuses
//podStatus := v.Status.PodStatuses
// Store Pod Status in app context
out, _ := json.Marshal(v.Status)
logrus.Info("Status::", string(out))
return nil
}
// StartClusterWatcher watches for CR
// configBytes - Kubectl file data
func StartClusterWatcher(provider, name string, configBytes []byte) error {
key := provider + "+" + name
// Get the lock
channelData.Lock()
defer channelData.Unlock()
// For first time
if channelData.channels == nil {
channelData.channels = make(map[string]chan struct{})
}
_, ok := channelData.channels[key]
if !ok {
// Create Channel
channelData.channels[key] = make(chan struct{})
// Create config
config, err := clientcmd.RESTConfigFromKubeConfig(configBytes)
if err != nil {
logrus.Info(fmt.Sprintf("RESTConfigFromKubeConfig error: %s", err.Error()))
return pkgerrors.Wrap(err, "RESTConfigFromKubeConfig error")
}
k8sClient, err := clientset.NewForConfig(config)
if err != nil {
return pkgerrors.Wrap(err, "Clientset NewForConfig error")
}
// Create Informer
mInformerFactory := informers.NewSharedInformerFactory(k8sClient, 0)
mInformer := mInformerFactory.K8splugin().V1alpha1().ResourceBundleStates().Informer()
go scheduleStatus(provider, name, channelData.channels[key], mInformer)
}
return nil
}
// StopClusterWatcher stop watching a cluster
func StopClusterWatcher(provider, name string) {
key := provider + "+" + name
if channelData.channels != nil {
c, ok := channelData.channels[key]
if ok {
close(c)
}
}
}
// CloseAllClusterWatchers close all channels
func CloseAllClusterWatchers() {
if channelData.channels == nil {
return
}
// Close all Channels to stop all watchers
for _, e := range channelData.channels {
close(e)
}
}
// Per Cluster Go routine to watch CR
func scheduleStatus(provider, name string, c <-chan struct{}, s cache.SharedIndexInformer) {
handlers := cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
v, ok := obj.(*v1alpha1.ResourceBundleState)
if ok {
labels := v.GetLabels()
l, ok := labels[monitorLabel]
if ok {
HandleStatusUpdate(provider, name, l, v)
}
}
},
UpdateFunc: func(oldObj, obj interface{}) {
v, ok := obj.(*v1alpha1.ResourceBundleState)
if ok {
labels := v.GetLabels()
l, ok := labels[monitorLabel]
if ok {
HandleStatusUpdate(provider, name, l, v)
}
}
},
DeleteFunc: func(obj interface{}) {
// Ignore it
},
}
s.AddEventHandler(handlers)
s.Run(c)
}
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