Support to set imagePullSecret when creating environment (#1429)

pkg/executor/util/util.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2019 The Fission Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"github.com/pkg/errors"
+	apiv1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+)
+
+// ApplyImagePullSecret applies image pull secret to the give pod spec. An error will be returned if failed to get secret.
+func ApplyImagePullSecret(client *kubernetes.Clientset, secret string, secretNS string, podspec apiv1.PodSpec) (*apiv1.PodSpec, error) {
+	if len(secret) > 0 && client != nil {
+		_, err := client.CoreV1().Secrets(secretNS).Get(secret, metav1.GetOptions{})
+		if err != nil {
+			err = errors.Wrapf(err, "unable to get image pull secret '%v' under namespace '%v'",
+				secret, secretNS)
+			return nil, err
+		}
+		podspec.ImagePullSecrets = []apiv1.LocalObjectReference{{Name: secret}}
+	}
+	return &podspec, nil
+}