mirror of https://github.com/kubernetes/kops.git
60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
/*
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Copyright 2017 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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"k8s.io/klog/v2"
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"k8s.io/kops/protokube/pkg/gossip/dns/hosts"
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)
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// HostsFile stores DNS records into /etc/hosts
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type HostsFile struct {
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Path string
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}
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var _ DNSTarget = &HostsFile{}
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func (h *HostsFile) Update(snapshot *DNSViewSnapshot) error {
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klog.V(2).Infof("Updating hosts file with snapshot version %v", snapshot.version)
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mutator := func(existing []string) (*hosts.HostMap, error) {
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hostMap := &hosts.HostMap{}
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badLines := hostMap.Parse(existing)
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if len(badLines) != 0 {
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klog.Warningf("ignoring unexpected lines in /etc/hosts: %v", badLines)
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}
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zones := snapshot.ListZones()
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for _, zone := range zones {
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records := snapshot.RecordsForZone(zone)
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for _, record := range records {
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if record.RrsType != "A" {
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klog.Warningf("skipping record of unhandled type: %v", record)
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continue
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}
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hostMap.ReplaceRecords(record.Name, record.Rrdatas)
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}
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}
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return hostMap, nil
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}
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return hosts.UpdateHostsFileWithRecords(h.Path, mutator)
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}
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