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63 lines
1.2 KiB
63 lines
1.2 KiB
1 year ago
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package dns
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import (
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"bytes"
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"fmt"
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"io"
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"net/netip"
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)
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// WriteTo writes the DNS data for the cluster
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func (mgr *Manager) WriteTo(w io.Writer) (int64, error) {
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var buf bytes.Buffer
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cache := make(map[string][]netip.Addr)
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// zones
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for _, z := range mgr.zones {
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mgr.writeZoneHosts(&buf, z)
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// zone alias
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addrs := mgr.genZoneAddresses(z)
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zoneName := z.Name
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rr := AddrRecord{
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Name: mgr.fqdn(zoneName + mgr.suffix),
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Addr: addrs,
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}
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_, _ = rr.WriteTo(&buf)
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// and cache for regions
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cache[zoneName] = addrs
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}
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// regions, sorted
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for _, name := range mgr.genRegionsSorted() {
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addrs := mgr.genRegionAddressesCached(name, cache)
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mgr.writeRegionAddresses(&buf, name, addrs)
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}
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return buf.WriteTo(w)
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}
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func (mgr *Manager) writeZoneHosts(w io.Writer, z *Zone) {
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_, _ = fmt.Fprintf(w, ";\n; %s\n;\n", z.Name)
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for _, rr := range mgr.genZoneHostRecords(z) {
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rr.Name = mgr.fqdn(rr.Name)
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_, _ = rr.WriteTo(w)
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}
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}
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func (mgr *Manager) writeRegionAddresses(w io.Writer, name string, addrs []netip.Addr) {
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_, _ = fmt.Fprintf(w, "; %s\n", name)
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rr := AddrRecord{
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Name: mgr.fqdn(name + mgr.suffix),
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Addr: addrs,
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}
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_, _ = rr.WriteTo(w)
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}
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