Updating the code to fix the context name before using it as secret and cluster names

test/e2e/framework/federation_util.go

@@ -0,0 +1,42 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 framework
+
+import (
+	"fmt"
+	"regexp"
+
+	"k8s.io/kubernetes/pkg/api/validation"
+	validation_util "k8s.io/kubernetes/pkg/util/validation"
+)
+
+// GetValidDNSSubdomainName massages the given name to be a valid dns subdomain name.
+// Most resources (such as secrets, clusters) require the names to be valid dns subdomain.
+// This is a generic function (not specific to federation). Should be moved to a more generic location if others want to use it.
+func GetValidDNSSubdomainName(name string) (string, error) {
+	// "_" are not allowed. Replace them by "-".
+	name = regexp.MustCompile("_").ReplaceAllLiteralString(name, "-")
+	maxLength := validation_util.DNS1123SubdomainMaxLength
+	if len(name) > maxLength {
+		name = name[0 : maxLength-1]
+	}
+	// Verify that name now passes the validation.
+	if errors := validation.NameIsDNSSubdomain(name, false); len(errors) != 0 {
+		return "", fmt.Errorf("errors in converting name to a valid DNS subdomain %s", errors)
+	}
+	return name, nil
+}