Added log level option configuration (argoproj#3201)

Signed-off-by: Omer Aplatony <omerap12@gmail.com>

common/common.go

@@ -27,8 +27,8 @@ import (
 const (
 	// EnvVarKubeConfig is the path to the Kubernetes configuration
 	EnvVarKubeConfig = "KUBECONFIG"
-	// EnvVarDebugLog is the env var to turn on the debug mode for logging
-	EnvVarDebugLog = "DEBUG_LOG"
+	// EnvVarLogLog is the env var to select the log level - options are debug, info, error
+	EnvVarLogLevel = "LOG_LEVEL"
 	// ENVVarPodName should be set to the name of the pod
 	EnvVarPodName = "POD_NAME"
 	// ENVVarLeaderElection sets the leader election mode

common/logging/logger.go

@@ -41,17 +41,15 @@ const (
 	LabelHTTPMethod      = "http-method"
 	LabelTime            = "time"
 	TimestampFormat      = "2006-01-02 15:04:05"
+	InfoLevel            = "info"
+	DebugLevel           = "debug"
+	ErrorLevel           = "error"
 )
 
 // NewArgoEventsLogger returns a new ArgoEventsLogger
 func NewArgoEventsLogger() *zap.SugaredLogger {
-	var config zap.Config
-	debugMode, ok := os.LookupEnv(common.EnvVarDebugLog)
-	if ok && debugMode == "true" {
-		config = zap.NewDevelopmentConfig()
-	} else {
-		config = zap.NewProductionConfig()
-	}
+	logLevel, _ := os.LookupEnv(common.EnvVarLogLevel)
+	config := ConfigureLogLevelLogger(logLevel)
 	// Config customization goes here if any
 	config.OutputPaths = []string{"stdout"}
 	logger, err := config.Build()
@@ -81,3 +79,19 @@ func FromContext(ctx context.Context) *zap.SugaredLogger {
 	}
 	return NewArgoEventsLogger()
 }
+
+// Returns logger conifg depending on the log level
+func ConfigureLogLevelLogger(logLevel string) zap.Config {
+	logConfig := zap.NewProductionConfig()
+	switch logLevel {
+	case InfoLevel:
+		logConfig.Level = zap.NewAtomicLevelAt(zap.InfoLevel)
+	case ErrorLevel:
+		logConfig.Level = zap.NewAtomicLevelAt(zap.ErrorLevel)
+	case DebugLevel:
+		logConfig.Level = zap.NewAtomicLevelAt(zap.DebugLevel)
+	default:
+		logConfig.Level = zap.NewAtomicLevelAt(zap.InfoLevel)
+	}
+	return logConfig
+}

docs/FAQ.md

@@ -25,7 +25,7 @@ with the desired namespace and service account. Make sure to grant the service a
      * Make sure you have configured the event source correctly.
      * Check the event-source pod's containers logs.
 
-Note: You can set the environment variable `DEBUG_LOG:true` in any of the containers to output debug logs. See [here](https://github.com/argoproj/argo-events/blob/master/examples/sensors/log-debug.yaml) for a debug example.
+Note: You can set the environment variable `LOG_LEVEL:info/debug/error` in any of the containers to output debug logs. See [here](https://github.com/argoproj/argo-events/blob/master/examples/sensors/log-debug.yaml) for a debug example.
 
 **Q. The event-source pod is receiving events but nothing happens.**
 

examples/sensors/log-debug.yaml

@@ -6,8 +6,8 @@ spec:
   template:
     container:
       env:
-        - name: DEBUG_LOG
-          value: "true"
+        - name: LOG_LEVEL
+          value: error
   dependencies:
     - name: test-dep
       eventSourceName: calendar