760e667063
Put the autopath stuff in a separate sub package. Tests are still included in the main kubernetes directory. Next steps (after this is merged), is pulling the autopath handling into the subpackage and fixing the tests.
560 lines
16 KiB
Go
560 lines
16 KiB
Go
package kubernetes
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import (
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"net"
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"sort"
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"testing"
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"github.com/coredns/coredns/middleware/kubernetes/autopath"
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"github.com/coredns/coredns/middleware/pkg/dnsrecorder"
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"github.com/coredns/coredns/middleware/test"
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"github.com/miekg/dns"
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"golang.org/x/net/context"
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"k8s.io/client-go/1.5/pkg/api"
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)
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var dnsTestCases = map[string](*test.Case){
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"A Service": {
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Qname: "svc1.testns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("svc1.testns.svc.cluster.local. 0 IN A 10.0.0.1"),
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},
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},
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"A Service (Headless)": {
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Qname: "hdls1.testns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("hdls1.testns.svc.cluster.local. 0 IN A 172.0.0.2"),
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test.A("hdls1.testns.svc.cluster.local. 0 IN A 172.0.0.3"),
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},
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},
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"SRV Service": {
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Qname: "_http._tcp.svc1.testns.svc.cluster.local.", Qtype: dns.TypeSRV,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.svc1.testns.svc.cluster.local. 0 IN SRV 0 100 80 svc1.testns.svc.cluster.local."),
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},
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Extra: []dns.RR{
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test.A("svc1.testns.svc.cluster.local. 0 IN A 10.0.0.1"),
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},
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},
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"SRV Service (Headless)": {
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Qname: "_http._tcp.hdls1.testns.svc.cluster.local.", Qtype: dns.TypeSRV,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.hdls1.testns.svc.cluster.local. 0 IN SRV 0 50 80 172-0-0-2.hdls1.testns.svc.cluster.local."),
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test.SRV("_http._tcp.hdls1.testns.svc.cluster.local. 0 IN SRV 0 50 80 172-0-0-3.hdls1.testns.svc.cluster.local."),
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},
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Extra: []dns.RR{
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test.A("172-0-0-2.hdls1.testns.svc.cluster.local. 0 IN A 172.0.0.2"),
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test.A("172-0-0-3.hdls1.testns.svc.cluster.local. 0 IN A 172.0.0.3"),
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},
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},
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// TODO A External
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"CNAME External": {
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Qname: "external.testns.svc.cluster.local.", Qtype: dns.TypeCNAME,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("external.testns.svc.cluster.local. 0 IN CNAME ext.interwebs.test."),
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},
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},
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"A Service (Local Federated)": {
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Qname: "svc1.testns.fed.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("svc1.testns.fed.svc.cluster.local. 0 IN A 10.0.0.1"),
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},
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},
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"PTR Service": {
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Qname: "1.0.0.10.in-addr.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("1.0.0.10.in-addr.arpa. 0 IN PTR svc1.testns.svc.cluster.local."),
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},
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},
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// TODO A Service (Remote Federated)
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"CNAME Service (Remote Federated)": {
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Qname: "svc0.testns.fed.svc.cluster.local.", Qtype: dns.TypeCNAME,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("svc0.testns.fed.svc.cluster.local. 0 IN CNAME svc0.testns.fed.svc.fd-az.fd-r.federal.test."),
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},
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},
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"AAAA Service (existing service)": {
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Qname: "svc1.testns.svc.cluster.local.", Qtype: dns.TypeAAAA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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"AAAA Service (non-existing service)": {
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Qname: "svc0.testns.svc.cluster.local.", Qtype: dns.TypeAAAA,
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Rcode: dns.RcodeNameError,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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"TXT Schema": {
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Qname: "dns-version.cluster.local.", Qtype: dns.TypeTXT,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.TXT("dns-version.cluster.local 28800 IN TXT 1.0.1"),
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},
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},
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}
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var podModeDisabledCases = map[string](*test.Case){
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"A Record Pod mode = Case 1": {
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Qname: "10-240-0-1.podns.pod.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Error: errPodsDisabled,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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"A Record Pod mode = Case 2": {
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Qname: "172-0-0-2.podns.pod.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Error: errPodsDisabled,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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}
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var podModeInsecureCases = map[string](*test.Case){
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"A Record Pod mode = Case 1": {
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Qname: "10-240-0-1.podns.pod.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("10-240-0-1.podns.pod.cluster.local. 0 IN A 10.240.0.1"),
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},
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},
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"A Record Pod mode = Case 2": {
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Qname: "172-0-0-2.podns.pod.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("172-0-0-2.podns.pod.cluster.local. 0 IN A 172.0.0.2"),
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},
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},
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}
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var podModeVerifiedCases = map[string](*test.Case){
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"A Record Pod mode = Case 1": {
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Qname: "10-240-0-1.podns.pod.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("10-240-0-1.podns.pod.cluster.local. 0 IN A 10.240.0.1"),
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},
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},
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"A Record Pod mode = Case 2": {
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Qname: "172-0-0-2.podns.pod.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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}
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var autopathCases = map[string](*test.Case){
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"A Autopath Service (Second Search)": {
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Qname: "svc1.testns.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("svc1.testns.podns.svc.cluster.local. 0 IN CNAME svc1.testns.svc.cluster.local."),
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test.A("svc1.testns.svc.cluster.local. 0 IN A 10.0.0.1"),
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},
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},
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"A Autopath Service (Third Search)": {
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Qname: "svc1.testns.svc.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("svc1.testns.svc.podns.svc.cluster.local. 0 IN CNAME svc1.testns.svc.cluster.local."),
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test.A("svc1.testns.svc.cluster.local. 0 IN A 10.0.0.1"),
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},
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},
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"A Autopath Next Middleware (Host Domain Search)": {
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Qname: "test1.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("test1.podns.svc.cluster.local. 0 IN CNAME test1.hostdom.test."),
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test.A("test1.hostdom.test. 0 IN A 11.22.33.44"),
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},
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},
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"A Autopath Service (Bare Search)": {
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Qname: "svc1.testns.svc.cluster.local.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("svc1.testns.svc.cluster.local.podns.svc.cluster.local. 0 IN CNAME svc1.testns.svc.cluster.local."),
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test.A("svc1.testns.svc.cluster.local. 0 IN A 10.0.0.1"),
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},
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},
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"A Autopath Next Middleware (Bare Search)": {
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Qname: "test2.interwebs.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("test2.interwebs.podns.svc.cluster.local. 0 IN CNAME test2.interwebs."),
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test.A("test2.interwebs. 0 IN A 55.66.77.88"),
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},
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},
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"AAAA Autopath Next Middleware (Bare Search)": {
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Qname: "test2.interwebs.podns.svc.cluster.local.", Qtype: dns.TypeAAAA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("test2.interwebs.podns.svc.cluster.local. 0 IN CNAME test2.interwebs."),
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test.AAAA("test2.interwebs. 0 IN AAAA 5555:6666:7777::8888"),
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},
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},
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}
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var autopathBareSearch = map[string](*test.Case){
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"A Autopath Next Middleware (Bare Search) Non-existing OnNXDOMAIN default": {
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Qname: "nothere.interwebs.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{},
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},
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}
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var autopathBareSearchExpectNameErr = map[string](*test.Case){
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"A Autopath Next Middleware (Bare Search) Non-existing OnNXDOMAIN disabled": {
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Qname: "nothere.interwebs.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Answer: []dns.RR{},
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},
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}
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var autopath2NDotsCases = map[string](*test.Case){
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"A Service (0 Dots)": {
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Qname: "foo.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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"A Service (1 Dots)": {
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Qname: "foo.foo.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Answer: []dns.RR{},
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Ns: []dns.RR{
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test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
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},
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},
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"A Service (2 Dots)": {
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Qname: "foo.foo.foo.podns.svc.cluster.local.", Qtype: dns.TypeA,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("foo.foo.foo.hostdom.test. 0 IN A 11.22.33.44"),
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test.CNAME("foo.foo.foo.podns.svc.cluster.local. 0 IN CNAME foo.foo.foo.hostdom.test."),
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},
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},
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}
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func TestServeDNS(t *testing.T) {
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k := Kubernetes{Zones: []string{"cluster.local."}}
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_, cidr, _ := net.ParseCIDR("10.0.0.0/8")
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k.ReverseCidrs = []net.IPNet{*cidr}
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k.Federations = []Federation{{name: "fed", zone: "federal.test."}}
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k.APIConn = &APIConnServeTest{}
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k.autoPath = new(autopath.AutoPath)
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k.autoPath.HostSearchPath = []string{"hostdom.test"}
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k.interfaceAddrsFunc = localPodIP
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k.Next = testHandler(nextMWMap)
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ctx := context.TODO()
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runServeDNSTests(ctx, t, dnsTestCases, k)
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runServeDNSTests(ctx, t, autopathCases, k)
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runServeDNSTests(ctx, t, autopathBareSearch, k)
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//Set PodMode to Disabled
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k.PodMode = PodModeDisabled
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runServeDNSTests(ctx, t, podModeDisabledCases, k)
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//Set PodMode to Insecure
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k.PodMode = PodModeInsecure
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runServeDNSTests(ctx, t, podModeInsecureCases, k)
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//Set PodMode to Verified
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k.PodMode = PodModeVerified
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runServeDNSTests(ctx, t, podModeVerifiedCases, k)
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// Set ndots to 2 for the ndots test cases
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k.autoPath.NDots = 2
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runServeDNSTests(ctx, t, autopath2NDotsCases, k)
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k.autoPath.NDots = defautNdots
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// Disable the NXDOMAIN override (enabled by default)
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k.autoPath.OnNXDOMAIN = dns.RcodeNameError
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runServeDNSTests(ctx, t, autopathCases, k)
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runServeDNSTests(ctx, t, autopathBareSearchExpectNameErr, k)
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}
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func runServeDNSTests(ctx context.Context, t *testing.T, dnsTestCases map[string](*test.Case), k Kubernetes) {
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for testname, tc := range dnsTestCases {
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testname = "\nTest Case \"" + testname + "\""
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r := tc.Msg()
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w := dnsrecorder.New(&test.ResponseWriter{})
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_, err := k.ServeDNS(ctx, w, r)
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if err != tc.Error {
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t.Errorf("%v expected no error, got %v\n", testname, err)
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return
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}
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if tc.Error != nil {
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continue
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}
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resp := w.Msg
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// Before sorting, make sure that CNAMES do not appear after their target records
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for i, c := range resp.Answer {
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if c.Header().Rrtype != dns.TypeCNAME {
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continue
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}
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for _, a := range resp.Answer[:i] {
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if a.Header().Name != c.(*dns.CNAME).Target {
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continue
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}
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t.Errorf("%v: CNAME found after target record\n", testname)
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t.Logf("%v Received:\n %v\n", testname, resp)
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}
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}
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sort.Sort(test.RRSet(resp.Answer))
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sort.Sort(test.RRSet(resp.Ns))
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sort.Sort(test.RRSet(resp.Extra))
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sort.Sort(test.RRSet(tc.Answer))
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sort.Sort(test.RRSet(tc.Ns))
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sort.Sort(test.RRSet(tc.Extra))
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if !test.Header(t, *tc, resp) {
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t.Logf("%v Received:\n %v\n", testname, resp)
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continue
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}
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if !test.Section(t, *tc, test.Answer, resp.Answer) {
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t.Logf("%v Received:\n %v\n", testname, resp)
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}
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if !test.Section(t, *tc, test.Ns, resp.Ns) {
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t.Logf("%v Received:\n %v\n", testname, resp)
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}
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if !test.Section(t, *tc, test.Extra, resp.Extra) {
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t.Logf("%v Received:\n %v\n", testname, resp)
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}
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}
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}
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// next middleware question->answer map
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var nextMWMap = map[dns.Question]dns.Msg{
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{Name: "test1.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
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Answer: []dns.RR{test.A("test1.hostdom.test. 0 IN A 11.22.33.44")},
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},
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{Name: "test2.interwebs.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
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Answer: []dns.RR{test.A("test2.interwebs. 0 IN A 55.66.77.88")},
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},
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{Name: "test2.interwebs.", Qtype: dns.TypeAAAA, Qclass: dns.ClassINET}: {
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Answer: []dns.RR{test.AAAA("test2.interwebs. 0 IN AAAA 5555:6666:7777::8888")},
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},
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{Name: "foo.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
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Answer: []dns.RR{test.A("foo.hostdom.test. 0 IN A 11.22.33.44")},
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},
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{Name: "foo.foo.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
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Answer: []dns.RR{test.A("foo.foo.hostdom.test. 0 IN A 11.22.33.44")},
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},
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{Name: "foo.foo.foo.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
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Answer: []dns.RR{test.A("foo.foo.foo.hostdom.test. 0 IN A 11.22.33.44")},
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},
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}
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// testHandler returns a Handler that returns an answer for the question in the
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// request per the question->answer map qMap.
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func testHandler(qMap map[dns.Question]dns.Msg) test.Handler {
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return test.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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m := new(dns.Msg)
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m.SetReply(r)
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msg, ok := qMap[r.Question[0]]
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if !ok {
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r.Rcode = dns.RcodeNameError
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return dns.RcodeNameError, nil
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}
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r.Rcode = dns.RcodeSuccess
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m.Answer = append(m.Answer, msg.Answer...)
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m.Extra = append(m.Extra, msg.Extra...)
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w.WriteMsg(m)
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return dns.RcodeSuccess, nil
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})
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}
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type APIConnServeTest struct{}
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func (APIConnServeTest) Run() { return }
|
|
func (APIConnServeTest) Stop() error { return nil }
|
|
|
|
func (APIConnServeTest) PodIndex(string) []interface{} {
|
|
a := make([]interface{}, 1)
|
|
a[0] = &api.Pod{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Namespace: "podns",
|
|
},
|
|
Status: api.PodStatus{
|
|
PodIP: "10.240.0.1", // Remote IP set in test.ResponseWriter
|
|
},
|
|
}
|
|
return a
|
|
}
|
|
|
|
func (APIConnServeTest) ServiceList() []*api.Service {
|
|
svcs := []*api.Service{
|
|
{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "svc1",
|
|
Namespace: "testns",
|
|
},
|
|
Spec: api.ServiceSpec{
|
|
ClusterIP: "10.0.0.1",
|
|
Ports: []api.ServicePort{{
|
|
Name: "http",
|
|
Protocol: "tcp",
|
|
Port: 80,
|
|
}},
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "hdls1",
|
|
Namespace: "testns",
|
|
},
|
|
Spec: api.ServiceSpec{
|
|
ClusterIP: api.ClusterIPNone,
|
|
},
|
|
},
|
|
{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "external",
|
|
Namespace: "testns",
|
|
},
|
|
Spec: api.ServiceSpec{
|
|
ExternalName: "ext.interwebs.test",
|
|
Ports: []api.ServicePort{{
|
|
Name: "http",
|
|
Protocol: "tcp",
|
|
Port: 80,
|
|
}},
|
|
},
|
|
},
|
|
}
|
|
return svcs
|
|
|
|
}
|
|
|
|
func (APIConnServeTest) EndpointsList() api.EndpointsList {
|
|
n := "test.node.foo.bar"
|
|
|
|
return api.EndpointsList{
|
|
Items: []api.Endpoints{
|
|
{
|
|
Subsets: []api.EndpointSubset{
|
|
{
|
|
Addresses: []api.EndpointAddress{
|
|
{
|
|
IP: "172.0.0.1",
|
|
Hostname: "ep1a",
|
|
},
|
|
},
|
|
Ports: []api.EndpointPort{
|
|
{
|
|
Port: 80,
|
|
Protocol: "tcp",
|
|
Name: "http",
|
|
},
|
|
},
|
|
},
|
|
},
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "svc1",
|
|
Namespace: "testns",
|
|
},
|
|
},
|
|
{
|
|
Subsets: []api.EndpointSubset{
|
|
{
|
|
Addresses: []api.EndpointAddress{
|
|
{
|
|
IP: "172.0.0.2",
|
|
},
|
|
},
|
|
Ports: []api.EndpointPort{
|
|
{
|
|
Port: 80,
|
|
Protocol: "tcp",
|
|
Name: "http",
|
|
},
|
|
},
|
|
},
|
|
},
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "hdls1",
|
|
Namespace: "testns",
|
|
},
|
|
},
|
|
{
|
|
Subsets: []api.EndpointSubset{
|
|
{
|
|
Addresses: []api.EndpointAddress{
|
|
{
|
|
IP: "172.0.0.3",
|
|
},
|
|
},
|
|
Ports: []api.EndpointPort{
|
|
{
|
|
Port: 80,
|
|
Protocol: "tcp",
|
|
Name: "http",
|
|
},
|
|
},
|
|
},
|
|
},
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "hdls1",
|
|
Namespace: "testns",
|
|
},
|
|
},
|
|
{
|
|
Subsets: []api.EndpointSubset{
|
|
{
|
|
Addresses: []api.EndpointAddress{
|
|
{
|
|
IP: "10.9.8.7",
|
|
NodeName: &n,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
func (APIConnServeTest) GetNodeByName(name string) (api.Node, error) {
|
|
return api.Node{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "test.node.foo.bar",
|
|
Labels: map[string]string{
|
|
labelRegion: "fd-r",
|
|
labelAvailabilityZone: "fd-az",
|
|
},
|
|
},
|
|
}, nil
|
|
}
|