Support multiple events in the lifecycle policy

Author: Rajadeepan D Ramesh

pkg/admission/admission_controller.go

@@ -115,32 +115,43 @@ func validatePolicies(policies []v1alpha1.LifecyclePolicy, fldPath *field.Path)
 	exitCodes := map[int32]struct{}{}
 
 	for _, policy := range policies {
-		if policy.Event != "" && policy.ExitCode != nil {
+		if (policy.Event != "" || len(policy.EventList) != 0) && policy.ExitCode != nil {
 			err = multierror.Append(err, fmt.Errorf("must not specify event and exitCode simultaneously"))
 			break
 		}
 
-		if policy.Event == "" && policy.ExitCode == nil {
+		if policy.Event == "" && len(policy.EventList) == 0 && policy.ExitCode == nil {
 			err = multierror.Append(err, fmt.Errorf("either event and exitCode should be specified"))
 			break
 		}
 
-		if policy.Event != "" {
-			if allow, ok := policyEventMap[policy.Event]; !ok || !allow {
-				err = multierror.Append(err, field.Invalid(fldPath, policy.Event, fmt.Sprintf("invalid policy event")))
-				break
+		if len(policy.Event) != 0 || len(policy.EventList) != 0 {
+			bFlag := false
+			policyEventsList := getEventlist(policy)
+			for _, event := range policyEventsList {
+				if allow, ok := policyEventMap[event]; !ok || !allow {
+					err = multierror.Append(err, field.Invalid(fldPath, event, fmt.Sprintf("invalid policy event")))
+					bFlag = true
+					break
+				}
+
+				if allow, ok := policyActionMap[policy.Action]; !ok || !allow {
+					err = multierror.Append(err, field.Invalid(fldPath, policy.Action, fmt.Sprintf("invalid policy action")))
+					bFlag = true
+					break
+				}
+				if _, found := policyEvents[event]; found {
+					err = multierror.Append(err, fmt.Errorf("duplicate event %v", event))
+					bFlag = true
+					break
+				} else {
+					policyEvents[event] = struct{}{}
+				}
 			}
-
-			if allow, ok := policyActionMap[policy.Action]; !ok || !allow {
-				err = multierror.Append(err, field.Invalid(fldPath, policy.Action, fmt.Sprintf("invalid policy action")))
+			if bFlag == true {
 				break
 			}
-			if _, found := policyEvents[policy.Event]; found {
-				err = multierror.Append(err, fmt.Errorf("duplicate event %v", policy.Event))
-				break
-			} else {
-				policyEvents[policy.Event] = struct{}{}
-			}
+
 		} else {
 			if *policy.ExitCode == 0 {
 				err = multierror.Append(err, fmt.Errorf("0 is not a valid error code"))
@@ -162,6 +173,27 @@ func validatePolicies(policies []v1alpha1.LifecyclePolicy, fldPath *field.Path)
 	return err
 }
 
+func getEventlist(policy v1alpha1.LifecyclePolicy) []v1alpha1.Event {
+	policyEventsList := policy.EventList
+	if len(policy.Event) > 0 {
+		policyEventsList = append(policyEventsList, policy.Event)
+	}
+	uniquePolicyEventlist := removeDuplicates(policyEventsList)
+	return uniquePolicyEventlist
+}
+
+func removeDuplicates(EventList []v1alpha1.Event) []v1alpha1.Event {
+	keys := make(map[v1alpha1.Event]bool)
+	list := []v1alpha1.Event{}
+	for _, val := range EventList {
+		if _, value := keys[val]; !value {
+			keys[val] = true
+			list = append(list, val)
+		}
+	}
+	return list
+}
+
 func getValidEvents() []v1alpha1.Event {
 	var events []v1alpha1.Event
 	for e, allow := range policyEventMap {

pkg/apis/batch/v1alpha1/job.go

@@ -180,6 +180,11 @@ type LifecyclePolicy struct {
 	// +optional
 	Event Event `json:"event,omitempty" protobuf:"bytes,2,opt,name=event"`
 
+	// The EventList recorded by scheduler; the controller takes actions
+	// according to this EventList.
+	// +optional
+	EventList []Event `json:"eventlist,omitempty" protobuf:"bytes,3,opt,name=eventlist"`
+
 	// The exit code of the pod container, controller will take action
 	// according to this code.
 	// Note: only one of `Event` or `ExitCode` can be specified.
@@ -189,7 +194,7 @@ type LifecyclePolicy struct {
 	// Timeout is the grace period for controller to take actions.
 	// Default to nil (take action immediately).
 	// +optional
-	Timeout *metav1.Duration `json:"timeout,omitempty" protobuf:"bytes,3,opt,name=timeout"`
+	Timeout *metav1.Duration `json:"timeout,omitempty" protobuf:"bytes,4,opt,name=timeout"`
 }
 
 // TaskSpec specifies the task specification of Job

pkg/apis/batch/v1alpha1/zz_generated.deepcopy.go

@@ -25,6 +25,7 @@ import (
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
+	"volcano.sh/volcano/pkg/apis/batch/v1alpha1"
 	vkv1 "volcano.sh/volcano/pkg/apis/batch/v1alpha1"
 	"volcano.sh/volcano/pkg/apis/helpers"
 	"volcano.sh/volcano/pkg/controllers/apis"
@@ -143,8 +144,10 @@ func applyPolicies(job *vkv1.Job, req *apis.Request) vkv1.Action {
 		for _, task := range job.Spec.Tasks {
 			if task.Name == req.TaskName {
 				for _, policy := range task.Policies {
-					if len(policy.Event) > 0 && len(req.Event) > 0 {
-						if policy.Event == req.Event || policy.Event == vkv1.AnyEvent {
+					policyEvents := getEventlist(policy)
+
+					if len(policyEvents) > 0 && len(req.Event) > 0 {
+						if checkEventExist(policyEvents, req.Event) || checkEventExist(policyEvents, vkv1.AnyEvent) {
 							return policy.Action
 						}
 					}
@@ -161,8 +164,10 @@ func applyPolicies(job *vkv1.Job, req *apis.Request) vkv1.Action {
 
 	// Parse Job level policies
 	for _, policy := range job.Spec.Policies {
-		if len(policy.Event) > 0 && len(req.Event) > 0 {
-			if policy.Event == req.Event || policy.Event == vkv1.AnyEvent {
+		policyEvents := getEventlist(policy)
+
+		if len(policyEvents) > 0 && len(req.Event) > 0 {
+			if checkEventExist(policyEvents, req.Event) || checkEventExist(policyEvents, vkv1.AnyEvent) {
 				return policy.Action
 			}
 		}
@@ -176,6 +181,24 @@ func applyPolicies(job *vkv1.Job, req *apis.Request) vkv1.Action {
 	return vkv1.SyncJobAction
 }
 
+func getEventlist(policy v1alpha1.LifecyclePolicy) []v1alpha1.Event {
+	policyEventsList := policy.EventList
+	if len(policy.Event) > 0 {
+		policyEventsList = append(policyEventsList, policy.Event)
+	}
+	return policyEventsList
+}
+
+func checkEventExist(policyEvents []v1alpha1.Event, reqEvent v1alpha1.Event) bool {
+	for _, event := range policyEvents {
+		if event == reqEvent {
+			return true
+		}
+	}
+	return false
+
+}
+
 func addResourceList(list, new v1.ResourceList) {
 	for name, quantity := range new {
 		if value, ok := list[name]; !ok {