fix: cache cancellations to prevent race conditions in pod creation

.github/workflows/remote-controller.yaml

@@ -47,7 +47,7 @@ jobs:
     - name: Setup correct Go version
       uses: actions/setup-go@v2
       with:
-        go-version: '1.17'
+        go-version: '1.20'
     - name: Install kubebuilder
       run: |
         #kubebuilder

controllers/v1beta1/build_controller.go

@@ -315,8 +315,8 @@ func (r *LagoonBuildReconciler) createNamespaceBuild(ctx context.Context,
 
 // getOrCreateBuildResource will deepcopy the lagoon build into a new resource and push it to the new namespace
 // then clean up the old one.
-func (r *LagoonBuildReconciler) getOrCreateBuildResource(ctx context.Context, build *lagoonv1beta1.LagoonBuild, ns string) error {
-	newBuild := build.DeepCopy()
+func (r *LagoonBuildReconciler) getOrCreateBuildResource(ctx context.Context, lagoonBuild *lagoonv1beta1.LagoonBuild, ns string) error {
+	newBuild := lagoonBuild.DeepCopy()
 	newBuild.SetNamespace(ns)
 	newBuild.SetResourceVersion("")
 	newBuild.SetLabels(
@@ -334,7 +334,7 @@ func (r *LagoonBuildReconciler) getOrCreateBuildResource(ctx context.Context, bu
 			return err
 		}
 	}
-	err = r.Delete(ctx, build)
+	err = r.Delete(ctx, lagoonBuild)
 	if err != nil {
 		return err
 	}

controllers/v1beta1/podmonitor_buildhandlers.go

@@ -38,12 +38,19 @@ func (r *LagoonMonitorReconciler) handleBuildMonitor(ctx context.Context,
 	if err != nil {
 		return err
 	}
+	cancel := false
 	if cancelBuild, ok := jobPod.ObjectMeta.Labels["lagoon.sh/cancelBuild"]; ok {
-		cancel, _ := strconv.ParseBool(cancelBuild)
-		if cancel {
-			opLog.Info(fmt.Sprintf("Attempting to cancel build %s", lagoonBuild.ObjectMeta.Name))
-			return r.updateDeploymentWithLogs(ctx, req, lagoonBuild, jobPod, nil, cancel)
-		}
+		cancel, _ = strconv.ParseBool(cancelBuild)
+	}
+	_, ok := r.Cache.Get(lagoonBuild.ObjectMeta.Name)
+	if ok {
+		opLog.Info(fmt.Sprintf("Cached cancellation exists (in podmonitor): %s", lagoonBuild.ObjectMeta.Name))
+		// this object exists in the cache meaning the task has been cancelled, do nothing
+		r.Cache.Remove(lagoonBuild.ObjectMeta.Name)
+		cancel = true
+	}
+	if cancel {
+		return r.updateDeploymentWithLogs(ctx, req, lagoonBuild, jobPod, nil, cancel)
 	}
 	// check if the build pod is in pending, a container in the pod could be failed in this state
 	if jobPod.Status.Phase == corev1.PodPending {

controllers/v1beta1/podmonitor_controller.go

@@ -23,6 +23,7 @@ import (
 	"strconv"
 
 	"github.com/go-logr/logr"
+	"github.com/hashicorp/golang-lru/v2/expirable"
 	lagoonv1beta1 "github.com/uselagoon/remote-controller/apis/lagoon/v1beta1"
 	"github.com/uselagoon/remote-controller/internal/helpers"
 	"github.com/uselagoon/remote-controller/internal/messenger"
@@ -50,6 +51,7 @@ type LagoonMonitorReconciler struct {
 	LagoonTargetName      string
 	LFFQoSEnabled         bool
 	BuildQoS              BuildQoS
+	Cache                 *expirable.LRU[string, string]
 }
 
 // slice of the different failure states of pods that we care about

controllers/v1beta1/podmonitor_taskhandlers.go

@@ -31,11 +31,19 @@ func (r *LagoonMonitorReconciler) handleTaskMonitor(ctx context.Context, opLog l
 	if err != nil {
 		return err
 	}
+	cancel := false
 	if cancelTask, ok := jobPod.ObjectMeta.Labels["lagoon.sh/cancelTask"]; ok {
-		cancel, _ := strconv.ParseBool(cancelTask)
-		if cancel {
-			return r.updateTaskWithLogs(ctx, req, lagoonTask, jobPod, nil, cancel)
-		}
+		cancel, _ = strconv.ParseBool(cancelTask)
+	}
+	_, ok := r.Cache.Get(lagoonTask.ObjectMeta.Name)
+	if ok {
+		opLog.Info(fmt.Sprintf("Cached cancellation exists (in podmonitor): %s", lagoonTask.ObjectMeta.Name))
+		// this object exists in the cache meaning the task has been cancelled, do nothing
+		r.Cache.Remove(lagoonTask.ObjectMeta.Name)
+		cancel = true
+	}
+	if cancel {
+		return r.updateTaskWithLogs(ctx, req, lagoonTask, jobPod, nil, cancel)
 	}
 	if jobPod.Status.Phase == corev1.PodPending {
 		for _, container := range jobPod.Status.ContainerStatuses {

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/go-logr/logr v1.2.4
 	github.com/google/go-cmp v0.5.9
 	github.com/hashicorp/go-version v1.6.0
+	github.com/hashicorp/golang-lru/v2 v2.0.6
 	github.com/k8up-io/k8up/v2 v2.7.1
 	github.com/mittwald/goharbor-client/v3 v3.3.0
 	github.com/mittwald/goharbor-client/v5 v5.3.1

go.sum

@@ -779,6 +779,8 @@ github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
+github.com/hashicorp/golang-lru/v2 v2.0.6 h1:3xi/Cafd1NaoEnS/yDssIiuVeDVywU0QdFGl3aQaQHM=
+github.com/hashicorp/golang-lru/v2 v2.0.6/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO+LraFDTW64=
 github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=

internal/messenger/consumer.go

@@ -312,6 +312,7 @@ func (m *Messenger) Consumer(targetName string) { //error {
 						namespace,
 					),
 				)
+				m.Cache.Add(jobSpec.Misc.Name, jobSpec.Project.Name)
 				err := m.CancelBuild(namespace, jobSpec)
 				if err != nil {
 					//@TODO: send msg back to lagoon and update task to failed?
@@ -327,6 +328,7 @@ func (m *Messenger) Consumer(targetName string) { //error {
 						namespace,
 					),
 				)
+				m.Cache.Add(jobSpec.Task.TaskName, jobSpec.Project.Name)
 				err := m.CancelTask(namespace, jobSpec)
 				if err != nil {
 					//@TODO: send msg back to lagoon and update task to failed?

internal/messenger/messenger.go

@@ -2,6 +2,7 @@ package messenger
 
 import (
 	"github.com/cheshir/go-mq/v2"
+	"github.com/hashicorp/golang-lru/v2/expirable"
 	"github.com/uselagoon/remote-controller/internal/utilities/deletions"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 )
@@ -35,6 +36,7 @@ type Messenger struct {
 	AdvancedTaskDeployTokenInjection bool
 	DeletionHandler                  *deletions.Deletions
 	EnableDebug                      bool
+	Cache                            *expirable.LRU[string, string]
 }
 
 // New returns a messaging with config and controller-runtime client.
@@ -49,6 +51,7 @@ func New(config mq.Config,
 	advancedTaskDeployTokenInjection bool,
 	deletionHandler *deletions.Deletions,
 	enableDebug bool,
+	cache *expirable.LRU[string, string],
 ) *Messenger {
 	return &Messenger{
 		Config:                           config,
@@ -62,5 +65,6 @@ func New(config mq.Config,
 		AdvancedTaskDeployTokenInjection: advancedTaskDeployTokenInjection,
 		DeletionHandler:                  deletionHandler,
 		EnableDebug:                      enableDebug,
+		Cache:                            cache,
 	}
 }

main.go

@@ -42,6 +42,7 @@ import (
 
 	cron "gopkg.in/robfig/cron.v2"
 
+	"github.com/hashicorp/golang-lru/v2/expirable"
 	k8upv1 "github.com/k8up-io/k8up/v2/api/v1"
 	lagoonv1beta1 "github.com/uselagoon/remote-controller/apis/lagoon/v1beta1"
 	lagoonv1beta1ctrl "github.com/uselagoon/remote-controller/controllers/v1beta1"
@@ -470,6 +471,9 @@ func main() {
 		os.Exit(1)
 	}
 
+	// create the cache
+	cache := expirable.NewLRU[string, string](1000, nil, time.Minute*60)
+
 	config := mq.Config{
 		ReconnectDelay: time.Duration(rabbitRetryInterval) * time.Second,
 		Exchanges: mq.Exchanges{
@@ -640,10 +644,12 @@ func main() {
 		advancedTaskDeployToken,
 		deletion,
 		enableDebug,
+		cache,
 	)
 
 	c := cron.New()
 	// if we are running with MQ support, then start the consumer handler
+
 	if enableMQ {
 		setupLog.Info("starting messaging handler")
 		go messaging.Consumer(lagoonTargetName)
@@ -812,6 +818,7 @@ func main() {
 		LagoonTargetName:      lagoonTargetName,
 		LFFQoSEnabled:         lffQoSEnabled,
 		BuildQoS:              buildQoSConfig,
+		Cache:                 cache,
 	}).SetupWithManager(mgr); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "LagoonMonitor")
 		os.Exit(1)