mirror of https://github.com/k3s-io/k3s
76 lines
2.1 KiB
Go
76 lines
2.1 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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// Fed contains federation specific DNS code.
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package fed
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import (
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"errors"
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"fmt"
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"strings"
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"k8s.io/kubernetes/pkg/util/validation"
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)
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var ErrExpectedKeyEqualsValue = errors.New("invalid format, must be key=value")
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// ParseFederationsFlag parses the federations command line flag. The
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// flag is a comma-separated list of zero or more "name=label" pairs,
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// e.g. "a=b,c=d".
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func ParseFederationsFlag(str string, federations map[string]string) error {
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if strings.TrimSpace(str) == "" {
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return nil
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}
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for _, val := range strings.Split(str, ",") {
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splits := strings.SplitN(strings.TrimSpace(val), "=", 2)
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if len(splits) != 2 {
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return ErrExpectedKeyEqualsValue
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}
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name := strings.TrimSpace(splits[0])
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domain := strings.TrimSpace(splits[1])
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if err := ValidateName(name); err != nil {
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return err
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}
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if err := ValidateDomain(domain); err != nil {
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return err
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}
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federations[name] = domain
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}
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return nil
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}
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// ValidateName checks the validity of a federation name.
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func ValidateName(name string) error {
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if errs := validation.IsDNS1123Label(name); len(errs) != 0 {
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return fmt.Errorf("%q not a valid federation name: %q", name, errs)
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}
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return nil
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}
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// ValidateDomain checks the validity of a federation label.
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func ValidateDomain(name string) error {
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// The federation domain name need not strictly be domain names, we
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// accept valid dns names with subdomain components.
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if errs := validation.IsDNS1123Subdomain(name); len(errs) != 0 {
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return fmt.Errorf("%q not a valid domain name: %q", name, errs)
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}
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return nil
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}
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