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43 lines
1.5 KiB
Go
43 lines
1.5 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package framework
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import (
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"fmt"
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"regexp"
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validationutil "k8s.io/apimachinery/pkg/util/validation"
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"k8s.io/kubernetes/pkg/api/validation"
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)
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// GetValidDNSSubdomainName massages the given name to be a valid dns subdomain name.
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// Most resources (such as secrets, clusters) require the names to be valid dns subdomain.
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// This is a generic function (not specific to federation). Should be moved to a more generic location if others want to use it.
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func GetValidDNSSubdomainName(name string) (string, error) {
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// "_" are not allowed. Replace them by "-".
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name = regexp.MustCompile("_").ReplaceAllLiteralString(name, "-")
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maxLength := validationutil.DNS1123SubdomainMaxLength
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if len(name) > maxLength {
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name = name[0 : maxLength-1]
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}
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// Verify that name now passes the validation.
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if errors := validation.NameIsDNSSubdomain(name, false); len(errors) != 0 {
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return "", fmt.Errorf("errors in converting name to a valid DNS subdomain %s", errors)
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}
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return name, nil
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}
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