Send bot start/stop messages to slack channel

helm/kubeops/values.yaml

@@ -6,7 +6,7 @@ replicaCount: 1
 
 image:
   repository: infracloud/kubeops
-  tag: "0.5"
+  tag: "0.6"
   pullPolicy: Always
 
 nameOverride: ""

pkg/controller/controller.go

@@ -1,17 +1,17 @@
 package controller
 
 import (
-	//"fmt"
 	"os"
 	"os/signal"
+	"strconv"
 	"strings"
 	"syscall"
 	"time"
 
 	"github.com/infracloudio/kubeops/pkg/config"
 	"github.com/infracloudio/kubeops/pkg/events"
 	"github.com/infracloudio/kubeops/pkg/filterengine"
-	"github.com/infracloudio/kubeops/pkg/logging"
+	log "github.com/infracloudio/kubeops/pkg/logging"
 	"github.com/infracloudio/kubeops/pkg/notify"
 	"github.com/infracloudio/kubeops/pkg/utils"
 
@@ -22,6 +22,11 @@ import (
 
 var startTime time.Time
 
+const (
+	controllerStartMsg = "...and now my watch begins! :crossed_swords:"
+	controllerStopMsg  = "my watch has ended!"
+)
+
 func findNamespace(ns string) string {
 	if ns == "all" {
 		return apiV1.NamespaceAll
@@ -34,10 +39,23 @@ func findNamespace(ns string) string {
 
 // RegisterInformers creates new informer controllers to watch k8s resources
 func RegisterInformers(c *config.Config) {
+	sendMessage(controllerStartMsg)
 	startTime = time.Now().Local()
+
+	// Get resync period
+	rsyncTimeStr, ok := os.LookupEnv("INFORMERS_RESYNC_PERIOD")
+	if !ok {
+		rsyncTimeStr = "30"
+	}
+
+	rsyncTime, err := strconv.Atoi(rsyncTimeStr)
+	if err != nil {
+		log.Logger.Fatal("Error in reading INFORMERS_RESYNC_PERIOD env var.", err)
+	}
+
 	// Register informers for resource lifecycle events
 	if len(c.Resources) > 0 {
-		logging.Logger.Info("Registering resource lifecycle informer")
+		log.Logger.Info("Registering resource lifecycle informer")
 		for _, r := range c.Resources {
 			if _, ok := utils.ResourceGetterMap[r.Name]; !ok {
 				continue
@@ -47,15 +65,15 @@ func RegisterInformers(c *config.Config) {
 				continue
 			}
 			for _, ns := range r.Namespaces {
-				logging.Logger.Infof("Adding informer for resource:%s namespace:%s", r.Name, ns)
+				log.Logger.Infof("Adding informer for resource:%s namespace:%s", r.Name, ns)
 
 				watchlist := cache.NewListWatchFromClient(
 					utils.ResourceGetterMap[r.Name], r.Name, findNamespace(ns), fields.Everything())
 
 				_, controller := cache.NewInformer(
 					watchlist,
 					object,
-					30*time.Minute,
+					time.Duration(rsyncTime)*time.Minute,
 					registerEventHandlers(r.Name, r.Events),
 				)
 				stopCh := make(chan struct{})
@@ -69,14 +87,14 @@ func RegisterInformers(c *config.Config) {
 
 	// Register informers for k8s events
 	if len(c.Events.Types) > 0 {
-		logging.Logger.Info("Registering kubernetes events informer")
+		log.Logger.Info("Registering kubernetes events informer")
 		watchlist := cache.NewListWatchFromClient(
 			utils.KubeClient.CoreV1().RESTClient(), "events", apiV1.NamespaceAll, fields.Everything())
 
 		_, controller := cache.NewInformer(
 			watchlist,
 			&apiV1.Event{},
-			30*time.Minute,
+			time.Duration(rsyncTime)*time.Minute,
 			cache.ResourceEventHandlerFuncs{
 				AddFunc: func(obj interface{}) {
 					key, err := cache.MetaNamespaceKeyFunc(obj)
@@ -89,12 +107,12 @@ func RegisterInformers(c *config.Config) {
 					ns := eventObj.InvolvedObject.Namespace
 					eType := strings.ToLower(eventObj.Type)
 
-					logging.Logger.Debugf("Received event: kind:%s ns:%s type:%s", kind, ns, eType)
+					log.Logger.Debugf("Received event: kind:%s ns:%s type:%s", kind, ns, eType)
 					// Filter and forward
 					if (utils.AllowedEventKindsMap[utils.EventKind{kind, "all"}] ||
 						utils.AllowedEventKindsMap[utils.EventKind{kind, ns}]) && (utils.AllowedEventTypesMap[eType]) {
-						logging.Logger.Infof("Processing add to events: %s. Invoked Object: %s:%s", key, eventObj.InvolvedObject.Kind, eventObj.InvolvedObject.Namespace)
-						logEvent(obj, "events", "create", err)
+						log.Logger.Infof("Processing add to events: %s. Invoked Object: %s:%s", key, eventObj.InvolvedObject.Kind, eventObj.InvolvedObject.Namespace)
+						sendEvent(obj, "events", "create", err)
 					}
 				},
 			},
@@ -109,56 +127,65 @@ func RegisterInformers(c *config.Config) {
 	signal.Notify(sigterm, syscall.SIGTERM)
 	signal.Notify(sigterm, syscall.SIGINT)
 	<-sigterm
-
+	sendMessage(controllerStopMsg)
 }
 
 func registerEventHandlers(resourceType string, events []string) (handlerFns cache.ResourceEventHandlerFuncs) {
 	for _, event := range events {
 		if event == "all" || event == "create" {
 			handlerFns.AddFunc = func(obj interface{}) {
 				key, err := cache.MetaNamespaceKeyFunc(obj)
-				logging.Logger.Debugf("Processing add to %v: %s", resourceType, key)
-				logEvent(obj, resourceType, "create", err)
+				log.Logger.Debugf("Processing add to %v: %s", resourceType, key)
+				sendEvent(obj, resourceType, "create", err)
 			}
 		}
 
 		if event == "all" || event == "update" {
 			handlerFns.UpdateFunc = func(old, new interface{}) {
 				key, err := cache.MetaNamespaceKeyFunc(new)
-				logging.Logger.Debugf("Processing update to %v: %s", resourceType, key)
-				logEvent(new, resourceType, "update", err)
+				log.Logger.Debugf("Processing update to %v: %s", resourceType, key)
+				sendEvent(new, resourceType, "update", err)
 			}
 		}
 
 		if event == "all" || event == "delete" {
 			handlerFns.DeleteFunc = func(obj interface{}) {
 				key, err := cache.MetaNamespaceKeyFunc(obj)
-				logging.Logger.Debugf("Processing delete to %v: %s", resourceType, key)
-				logEvent(obj, resourceType, "delete", err)
+				log.Logger.Debugf("Processing delete to %v: %s", resourceType, key)
+				sendEvent(obj, resourceType, "delete", err)
 			}
 		}
 	}
 	return handlerFns
 }
 
-func logEvent(obj interface{}, kind, eventType string, err error) {
+func sendEvent(obj interface{}, kind, eventType string, err error) {
 	if err != nil {
-		logging.Logger.Error("Error while receiving event: ", err.Error())
+		log.Logger.Error("Error while receiving event: ", err.Error())
 		return
 	}
 
 	// Skip older events
 	if eventType == "create" {
 		objectMeta := utils.GetObjectMetaData(obj)
 		if objectMeta.CreationTimestamp.Sub(startTime).Seconds() <= 0 {
-			logging.Logger.Debug("Skipping older events")
+			log.Logger.Debug("Skipping older events")
+			return
+		}
+	}
+
+	// Skip older events
+	if eventType == "delete" {
+		objectMeta := utils.GetObjectMetaData(obj)
+		if objectMeta.DeletionTimestamp.Sub(startTime).Seconds() <= 0 {
+			log.Logger.Debug("Skipping older events")
 			return
 		}
 	}
 
 	// Check if Notify disabled
 	if !config.Notify {
-		logging.Logger.Info("Skipping notification")
+		log.Logger.Info("Skipping notification")
 		return
 	}
 
@@ -168,5 +195,15 @@ func logEvent(obj interface{}, kind, eventType string, err error) {
 
 	// Send notification to communication chennel
 	notifier := notify.NewSlack()
-	notifier.Send(event)
+	notifier.SendEvent(event)
+}
+
+func sendMessage(msg string) {
+	if len(msg) <= 0 {
+		log.Logger.Warn("sendMessage received string with length 0. Hence skipping.")
+		return
+	}
+
+	notifier := notify.NewSlack()
+	notifier.SendMessage(msg)
 }

pkg/events/events.go

@@ -51,7 +51,7 @@ var LevelMap map[string]Level
 func init() {
 	LevelMap = make(map[string]Level)
 	LevelMap["create"] = Info
-	LevelMap["Update"] = Debug
+	LevelMap["update"] = Warn
 	LevelMap["delete"] = Critical
 	LevelMap["error"] = Error
 	LevelMap["Warning"] = Critical
@@ -69,7 +69,15 @@ func New(object interface{}, eventType string, kind string) Event {
 		Kind:      objectTypeMeta.Kind,
 		Level:     LevelMap[eventType],
 		Type:      eventType,
-		TimeStamp: objectMeta.CreationTimestamp.Time,
+	}
+
+	// Add TimeStamps
+	if eventType == "create" {
+		event.TimeStamp = objectMeta.CreationTimestamp.Time
+	}
+
+	if eventType == "delete" {
+		event.TimeStamp = objectMeta.DeletionTimestamp.Time
 	}
 
 	if kind != "events" {

pkg/execute/executor.go

@@ -33,6 +33,12 @@ var validNotifierCommands = map[string]bool{
 
 var kubectlBinary = "/usr/local/bin/kubectl"
 
+const (
+	notifierStopMsg   = "Brace yourselves, notifications are coming."
+	notifierStartMsg  = "Sure! I won't send you notifications anymore."
+	unsupportedCmdMsg = "Command not supported. Please run '@kubeops help' to see supported commands."
+)
+
 // Executor is an interface for processes to execute commands
 type Executor interface {
 	Execute() string
@@ -59,7 +65,7 @@ func (e *DefaultExecutor) Execute() string {
 	if validNotifierCommands[args[0]] {
 		return runNotifierCommand(args)
 	}
-	return "Command not supported. Please run '@kubeops help' to see supported commands"
+	return unsupportedCmdMsg
 }
 
 func printHelp() string {
@@ -88,7 +94,7 @@ func printHelp() string {
 }
 
 func printDefaultMsg() string {
-	return "Command not supported. Please run '@kubeops help' to see supported commands"
+	return unsupportedCmdMsg
 }
 
 func runKubectlCommand(args []string) string {
@@ -132,11 +138,13 @@ func runNotifierCommand(args []string) string {
 		}
 		if args[1] == "start" {
 			config.Notify = true
-			return "Notifier started!"
+			log.Logger.Info("Notifier enabled")
+			return notifierStartMsg
 		}
 		if args[1] == "stop" {
 			config.Notify = false
-			return "Notifier stopped!"
+			log.Logger.Info("Notifier disabled")
+			return notifierStopMsg
 		}
 		if args[1] == "status" {
 			if config.Notify == false {

pkg/filterengine/filters/ingress_validator.go

@@ -38,7 +38,7 @@ func (iv *IngressValidator) Run(object interface{}, event *events.Event) {
 			}
 			_, err := ValidServicePort(serviceName, ns, int32(servicePort))
 			if err != nil {
-				event.Messages = append(event.Messages, "Warning: Service "+serviceName+" used in ingress config does not exist or port not exposed\n")
+				event.Messages = append(event.Messages, "Service "+serviceName+" used in ingress config does not exist or port not exposed\n")
 				event.Level = events.Warn
 			}
 		}

pkg/notify/notify.go

@@ -6,5 +6,6 @@ import (
 
 // Notifier to send event notification on the communication channels
 type Notifier interface {
-	Send(events.Event) error
+	SendEvent(events.Event) error
+	SendMessage(string) error
 }

pkg/notify/slack.go

@@ -40,8 +40,8 @@ func NewSlack() Notifier {
 	}
 }
 
-// Send event notification to slack
-func (s *Slack) Send(event events.Event) error {
+// SendEvent sends event notification to slack
+func (s *Slack) SendEvent(event events.Event) error {
 	log.Logger.Info(fmt.Sprintf(">> Sending to slack: %+v", event))
 
 	api := slack.New(s.Token)
@@ -63,7 +63,12 @@ func (s *Slack) Send(event events.Event) error {
 			},
 		},
 		Footer: "kubeops",
-		Ts:     json.Number(strconv.FormatInt(event.TimeStamp.Unix(), 10)),
+	}
+
+	// Add timestamp
+	ts := json.Number(strconv.FormatInt(event.TimeStamp.Unix(), 10))
+	if ts > "0" {
+		attachment.Ts = ts
 	}
 
 	if event.Namespace != "" {
@@ -114,7 +119,6 @@ func (s *Slack) Send(event events.Event) error {
 	attachment.Color = attachmentColor[event.Level]
 	params.Attachments = []slack.Attachment{attachment}
 
-	log.Logger.Infof("Sending message on %v with token %s", s.Channel, s.Token)
 	channelID, timestamp, err := api.PostMessage(s.Channel, "", params)
 	if err != nil {
 		log.Logger.Errorf("Error in sending slack message %s", err.Error())
@@ -124,3 +128,22 @@ func (s *Slack) Send(event events.Event) error {
 	log.Logger.Infof("Message successfully sent to channel %s at %s", channelID, timestamp)
 	return nil
 }
+
+// SendMessage sends message to slack channel
+func (s *Slack) SendMessage(msg string) error {
+	log.Logger.Info(fmt.Sprintf(">> Sending to slack: %+v", msg))
+
+	api := slack.New(s.Token)
+	params := slack.PostMessageParameters{
+		AsUser: true,
+	}
+
+	channelID, timestamp, err := api.PostMessage(s.Channel, msg, params)
+	if err != nil {
+		log.Logger.Errorf("Error in sending slack message %s", err.Error())
+		return err
+	}
+
+	log.Logger.Infof("Message successfully sent to channel %s at %s", channelID, timestamp)
+	return nil
+}