feat(launcher): Add credential refresh to launcher

backend/src/v2/component/launcher_v2.go

@@ -162,6 +162,14 @@ func stopWaitingArtifacts(artifacts map[string]*pipelinespec.ArtifactList) {
 	}
 }
 
+// OpenBucketConfig stores the parameters that are passed into the objectstore.OpenBucket function.
+type OpenBucketConfig struct {
+	ctx       context.Context
+	k8sClient kubernetes.Interface
+	namespace string
+	config    *objectstore.Config
+}
+
 // Execute calls executeV2, updates the cache, and publishes the results to MLMD.
 func (l *LauncherV2) Execute(ctx context.Context) (err error) {
 	defer func() {
@@ -218,7 +226,20 @@ func (l *LauncherV2) Execute(ctx context.Context) (err error) {
 	if err != nil {
 		return err
 	}
-	bucket, err := objectstore.OpenBucket(ctx, l.clientManager.K8sClient(), l.options.Namespace, bucketConfig)
+
+	openBucketConfig := &OpenBucketConfig{
+		ctx:       ctx,
+		k8sClient: l.clientManager.K8sClient(),
+		namespace: l.options.Namespace,
+		config:    bucketConfig,
+	}
+
+	bucket, err := objectstore.OpenBucket(
+		openBucketConfig.ctx,
+		openBucketConfig.k8sClient,
+		openBucketConfig.namespace,
+		openBucketConfig.config,
+	)
 	if err != nil {
 		return err
 	}
@@ -238,6 +259,7 @@ func (l *LauncherV2) Execute(ctx context.Context) (err error) {
 		l.clientManager.K8sClient(),
 		l.options.PublishLogs,
 		l.options.CaCertPath,
+		openBucketConfig,
 	)
 	if err != nil {
 		return err
@@ -361,6 +383,7 @@ func executeV2(
 	k8sClient kubernetes.Interface,
 	publishLogs string,
 	customCAPath string,
+	openBucketConfig *OpenBucketConfig,
 ) (*pipelinespec.ExecutorOutput, []*metadata.OutputArtifact, error) {
 
 	// Add parameter default values to executorInput, if there is not already a user input.
@@ -399,15 +422,38 @@ func executeV2(
 	if err != nil {
 		return nil, nil, err
 	}
-	// TODO(Bobgy): should we log metadata per each artifact, or batched after uploading all artifacts.
+
 	outputArtifacts, err := uploadOutputArtifacts(ctx, executorInput, executorOutput, uploadOutputArtifactsOptions{
 		bucketConfig:   bucketConfig,
 		bucket:         bucket,
 		metadataClient: metadataClient,
 	})
+
 	if err != nil {
-		return nil, nil, err
+		glog.Errorf("Failed to upload output artifacts: %v", err)
+
+		glog.Info("Refreshing credentials before retrying artifacts upload.")
+		bucket, err = objectstore.OpenBucket(
+			openBucketConfig.ctx,
+			openBucketConfig.k8sClient,
+			openBucketConfig.namespace,
+			openBucketConfig.config,
+		)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		glog.Info("Executing second uploadOutputArtifacts attempt.")
+		outputArtifacts, err = uploadOutputArtifacts(ctx, executorInput, executorOutput, uploadOutputArtifactsOptions{
+			bucketConfig:   bucketConfig,
+			bucket:         bucket,
+			metadataClient: metadataClient,
+		})
+		if err != nil {
+			return nil, nil, err
+		}
 	}
+
 	// TODO(Bobgy): only return executor output. Merge info in output artifacts
 	// to executor output.
 	return executorOutput, outputArtifacts, nil
@@ -612,7 +658,12 @@ type uploadOutputArtifactsOptions struct {
 	metadataClient metadata.ClientInterface
 }
 
-func uploadOutputArtifacts(ctx context.Context, executorInput *pipelinespec.ExecutorInput, executorOutput *pipelinespec.ExecutorOutput, opts uploadOutputArtifactsOptions) ([]*metadata.OutputArtifact, error) {
+func uploadOutputArtifacts(
+	ctx context.Context,
+	executorInput *pipelinespec.ExecutorInput,
+	executorOutput *pipelinespec.ExecutorOutput,
+	opts uploadOutputArtifactsOptions,
+) ([]*metadata.OutputArtifact, error) {
 	// Register artifacts with MLMD.
 	outputArtifacts := make([]*metadata.OutputArtifact, 0, len(executorInput.GetOutputs().GetArtifacts()))
 	for name, artifactList := range executorInput.GetOutputs().GetArtifacts() {

backend/src/v2/component/launcher_v2_test.go

@@ -103,6 +103,7 @@ func Test_executeV2_Parameters(t *testing.T) {
 				fakeKubernetesClientset,
 				"false",
 				"",
+				&OpenBucketConfig{context.Background(), fakeKubernetesClientset, "namespace", bucketConfig},
 			)
 
 			if test.wantErr {
@@ -165,6 +166,7 @@ func Test_executeV2_publishLogs(t *testing.T) {
 				fakeKubernetesClientset,
 				"false",
 				"",
+				&OpenBucketConfig{context.Background(), fakeKubernetesClientset, "namespace", bucketConfig},
 			)
 
 			if test.wantErr {