630d3d60b9
* use all local IPs * mult/bind ips * gofmt + boundIPs fix * fix no matching endpoint case * don't duplicate NS records in answer * fix answer dedup * fix comment * add multi local ip test case
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package kubernetes
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import (
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"net"
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"github.com/caddyserver/caddy"
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"github.com/coredns/coredns/core/dnsserver"
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)
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// boundIPs returns the list of non-loopback IPs that CoreDNS is bound to
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func boundIPs(c *caddy.Controller) (ips []net.IP) {
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conf := dnsserver.GetConfig(c)
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hosts := conf.ListenHosts
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if hosts == nil || hosts[0] == "" {
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hosts = nil
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addrs, err := net.InterfaceAddrs()
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if err != nil {
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return nil
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}
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for _, addr := range addrs {
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hosts = append(hosts, addr.String())
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}
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}
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for _, host := range hosts {
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ip, _, _ := net.ParseCIDR(host)
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ip4 := ip.To4()
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if ip4 != nil && !ip4.IsLoopback() {
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ips = append(ips, ip4)
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continue
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}
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ip6 := ip.To16()
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if ip6 != nil && !ip6.IsLoopback() {
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ips = append(ips, ip6)
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}
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}
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return ips
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}
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// LocalNodeName is exclusively used in federation plugin, will be deprecated later.
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func (k *Kubernetes) LocalNodeName() string {
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if len(k.localIPs) == 0 {
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return ""
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}
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// Find fist endpoint matching any localIP
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for _, localIP := range k.localIPs {
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for _, ep := range k.APIConn.EpIndexReverse(localIP.String()) {
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for _, eps := range ep.Subsets {
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for _, addr := range eps.Addresses {
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if localIP.Equal(net.ParseIP(addr.IP)) {
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return addr.NodeName
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}
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}
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}
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}
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}
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return ""
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}
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