mirror of https://github.com/kubernetes/kops.git
101 lines
2.2 KiB
Go
101 lines
2.2 KiB
Go
/*
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Copyright 2019 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 dns
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import (
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"fmt"
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"strings"
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"k8s.io/klog/v2"
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"k8s.io/kops/dnsprovider/pkg/dnsprovider"
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)
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type ZoneSpec struct {
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Name string
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ID string
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}
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func ParseZoneSpec(s string) (*ZoneSpec, error) {
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s = strings.TrimSpace(s)
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tokens := strings.SplitN(s, "/", 2)
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if len(tokens) == 2 && tokens[0] == "*" {
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// */1234: Match by ID
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return &ZoneSpec{ID: tokens[1]}, nil
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}
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name := EnsureDotSuffix(tokens[0])
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if len(tokens) == 1 {
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// example.com: Match by name
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return &ZoneSpec{Name: name}, nil
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}
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// example.com/1234: Match by name & id
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return &ZoneSpec{Name: name, ID: tokens[1]}, nil
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}
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type ZoneRules struct {
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// We don't use a map so we can support e.g. *.example.com later
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Zones []*ZoneSpec
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Wildcard bool
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}
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func ParseZoneRules(zones []string) (*ZoneRules, error) {
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r := &ZoneRules{}
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for _, s := range zones {
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s = strings.TrimSpace(s)
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if s == "*" || s == "*/*" {
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r.Wildcard = true
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continue
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}
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zoneSpec, err := ParseZoneSpec(s)
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if err != nil {
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return nil, fmt.Errorf("error parsing %q: %v", s, err)
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}
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r.Zones = append(r.Zones, zoneSpec)
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}
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if len(zones) == 0 {
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klog.Infof("No rules specified, will permit management of all zones")
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r.Wildcard = true
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}
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return r, nil
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}
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// MatchesExplicitly returns true if this matches an explicit rule (not a wildcard)
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func (r *ZoneRules) MatchesExplicitly(zone dnsprovider.Zone) bool {
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name := EnsureDotSuffix(zone.Name())
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id := zone.ID()
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for _, zoneSpec := range r.Zones {
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if zoneSpec.Name != "" && zoneSpec.Name != name {
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continue
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}
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if zoneSpec.ID != "" && zoneSpec.ID != id {
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return false
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}
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return true
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}
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return false
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}
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