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mw/kubernetes: autopath refactors (#850)
Factor out as much of autopath into a subpackage as possible right now. apw.Sent is not needed, we should see this from the rcode returned by the middleware. See #852 on why this was needed. Disable the tests for now as to not break the main build.
This commit is contained in:
Miek Gieben
GitHub
@@ -1,6 +1,10 @@
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package autopath
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import "github.com/miekg/dns"
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import (
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"strings"
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"github.com/miekg/dns"
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)
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// Writer implements a ResponseWriter that also does the following:
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// * reverts question section of a packet to its original state.
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@@ -18,7 +22,6 @@ type Writer struct {
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dns.ResponseWriter
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original dns.Question
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Rcode int
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Sent bool
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}
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// AutoPath enables server side search path lookups for pods.
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@@ -40,24 +43,10 @@ func NewWriter(w dns.ResponseWriter, r *dns.Msg) *Writer {
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// WriteMsg writes to client, unless response will be NXDOMAIN.
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func (apw *Writer) WriteMsg(res *dns.Msg) error {
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return apw.overrideMsg(res, false)
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}
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// ForceWriteMsg forces the write to client regardless of response code.
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func (apw *Writer) ForceWriteMsg(res *dns.Msg) error {
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return apw.overrideMsg(res, true)
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}
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// overrideMsg overrides rcode, reverts question, adds CNAME, and calls the
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// underlying ResponseWriter's WriteMsg method unless the write is deferred,
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// or force = true.
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func (apw *Writer) overrideMsg(res *dns.Msg, force bool) error {
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if res.Rcode == dns.RcodeNameError {
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res.Rcode = apw.Rcode
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}
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if res.Rcode != dns.RcodeSuccess && !force {
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return nil
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}
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for _, a := range res.Answer {
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if apw.original.Name == a.Header().Name {
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continue
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@@ -67,7 +56,7 @@ func (apw *Writer) overrideMsg(res *dns.Msg, force bool) error {
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res.Answer[0] = CNAME(apw.original.Name, a.Header().Name, a.Header().Ttl)
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}
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res.Question[0] = apw.original
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apw.Sent = true
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return apw.ResponseWriter.WriteMsg(res)
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}
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@@ -77,9 +66,10 @@ func (apw *Writer) Write(buf []byte) (int, error) {
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return n, err
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}
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// Hijack implements dns.Hijacker. It simply wraps the underlying
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// ResponseWriter's Hijack method if there is one, or returns an error.
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func (apw *Writer) Hijack() {
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apw.ResponseWriter.Hijack()
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return
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func SplitSearch(zone, question, namespace string) (name, search string, ok bool) {
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search = strings.Join([]string{namespace, "svc", zone}, ".")
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if dns.IsSubDomain(search, question) {
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return question[:len(question)-len(search)-1], search, true
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}
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return "", "", false
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}
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26
middleware/kubernetes/autopath/autopath_test.go
Normal file
26
middleware/kubernetes/autopath/autopath_test.go
Normal file
@@ -0,0 +1,26 @@
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package autopath
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import "testing"
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func TestSplitSearchPath(t *testing.T) {
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type testCase struct {
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question string
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namespace string
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expectedName string
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expectedSearch string
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expectedOk bool
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}
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tests := []testCase{
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{question: "test.blah.com", namespace: "ns1", expectedName: "", expectedSearch: "", expectedOk: false},
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{question: "foo.com.ns2.svc.interwebs.nets", namespace: "ns1", expectedName: "", expectedSearch: "", expectedOk: false},
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{question: "foo.com.svc.interwebs.nets", namespace: "ns1", expectedName: "", expectedSearch: "", expectedOk: false},
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{question: "foo.com.ns1.svc.interwebs.nets", namespace: "ns1", expectedName: "foo.com", expectedSearch: "ns1.svc.interwebs.nets", expectedOk: true},
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}
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zone := "interwebs.nets"
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for _, c := range tests {
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name, search, ok := SplitSearch(zone, c.question, c.namespace)
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if c.expectedName != name || c.expectedSearch != search || c.expectedOk != ok {
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t.Errorf("Case %v: Expected name'%v', search:'%v', ok:'%v'. Got name:'%v', search:'%v', ok:'%v'.", c.question, c.expectedName, c.expectedSearch, c.expectedOk, name, search, ok)
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}
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}
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}
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176
middleware/kubernetes/autopath_test.go
Normal file
176
middleware/kubernetes/autopath_test.go
Normal file
@@ -0,0 +1,176 @@
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package kubernetes
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import (
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"net"
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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/test"
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"github.com/miekg/dns"
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"golang.org/x/net/context"
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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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// Disabled because broken.
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func testServeDNSAutoPath(t *testing.T) {
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k := Kubernetes{}
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k.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 = nextHandler(nextMap)
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ctx := context.TODO()
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runServeDNSTests(ctx, t, autopathCases, k)
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runServeDNSTests(ctx, t, autopathBareSearch, 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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var nextMap = 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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// nextHandler 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 nextHandler(mm 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 := mm[r.Question[0]]
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if !ok {
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r.Rcode = dns.RcodeNameError
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w.WriteMsg(m)
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return r.Rcode, 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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w.WriteMsg(m)
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return r.Rcode, nil
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})
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}
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@@ -39,13 +39,15 @@ func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.M
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// Set the zone to this specific request.
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zone = state.Name()
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}
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records, extra, _, err := k.routeRequest(zone, state)
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// Check for Autopath search eligibility
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if (k.autoPath != nil) && k.IsNameError(err) && (state.QType() == dns.TypeA || state.QType() == dns.TypeAAAA) {
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p := k.findPodWithIP(state.IP())
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for p != nil {
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name, path, ok := splitSearch(zone, state.QName(), p.Namespace)
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name, path, ok := autopath.SplitSearch(zone, state.QName(), p.Namespace)
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if !ok {
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break
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}
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@@ -73,7 +75,8 @@ func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.M
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for _, hostsearch := range k.autoPath.HostSearchPath {
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newstate := state.NewWithQuestion(strings.Join([]string{name, hostsearch}, "."), state.QType())
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rcode, nextErr := middleware.NextOrFailure(k.Name(), k.Next, ctx, apw, newstate.Req)
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if apw.Sent {
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if middleware.ClientWrite(rcode) || rcode == dns.RcodeNameError {
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return rcode, nextErr
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}
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}
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@@ -91,11 +94,11 @@ func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.M
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newstate = state.NewWithQuestion(strings.Join([]string{name, "."}, ""), state.QType())
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r = newstate.Req
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rcode, nextErr := middleware.NextOrFailure(k.Name(), k.Next, ctx, apw, r)
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if !apw.Sent && nextErr == nil {
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if !(middleware.ClientWrite(rcode) || rcode == dns.RcodeNameError) && nextErr == nil {
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r = dnsutil.Dedup(r)
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state.SizeAndDo(r)
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r, _ = state.Scrub(r)
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apw.ForceWriteMsg(r)
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apw.WriteMsg(r)
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}
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return rcode, nextErr
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}
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@@ -5,7 +5,6 @@ import (
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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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@@ -169,97 +168,6 @@ var podModeVerifiedCases = map[string](*test.Case){
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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{
|
||||
test.CNAME("test2.interwebs.podns.svc.cluster.local. 0 IN CNAME test2.interwebs."),
|
||||
test.AAAA("test2.interwebs. 0 IN AAAA 5555:6666:7777::8888"),
|
||||
},
|
||||
},
|
||||
}
|
||||
var autopathBareSearch = map[string](*test.Case){
|
||||
"A Autopath Next Middleware (Bare Search) Non-existing OnNXDOMAIN default": {
|
||||
Qname: "nothere.interwebs.podns.svc.cluster.local.", Qtype: dns.TypeA,
|
||||
Rcode: dns.RcodeSuccess,
|
||||
Answer: []dns.RR{},
|
||||
},
|
||||
}
|
||||
var autopathBareSearchExpectNameErr = map[string](*test.Case){
|
||||
"A Autopath Next Middleware (Bare Search) Non-existing OnNXDOMAIN disabled": {
|
||||
Qname: "nothere.interwebs.podns.svc.cluster.local.", Qtype: dns.TypeA,
|
||||
Rcode: dns.RcodeNameError,
|
||||
Answer: []dns.RR{},
|
||||
},
|
||||
}
|
||||
var autopath2NDotsCases = map[string](*test.Case){
|
||||
"A Service (0 Dots)": {
|
||||
Qname: "foo.podns.svc.cluster.local.", Qtype: dns.TypeA,
|
||||
Rcode: dns.RcodeNameError,
|
||||
Answer: []dns.RR{},
|
||||
Ns: []dns.RR{
|
||||
test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
|
||||
},
|
||||
},
|
||||
"A Service (1 Dots)": {
|
||||
Qname: "foo.foo.podns.svc.cluster.local.", Qtype: dns.TypeA,
|
||||
Rcode: dns.RcodeNameError,
|
||||
Answer: []dns.RR{},
|
||||
Ns: []dns.RR{
|
||||
test.SOA("cluster.local. 300 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1499347823 7200 1800 86400 60"),
|
||||
},
|
||||
},
|
||||
"A Service (2 Dots)": {
|
||||
Qname: "foo.foo.foo.podns.svc.cluster.local.", Qtype: dns.TypeA,
|
||||
Rcode: dns.RcodeSuccess,
|
||||
Answer: []dns.RR{
|
||||
test.A("foo.foo.foo.hostdom.test. 0 IN A 11.22.33.44"),
|
||||
test.CNAME("foo.foo.foo.podns.svc.cluster.local. 0 IN CNAME foo.foo.foo.hostdom.test."),
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
func TestServeDNS(t *testing.T) {
|
||||
|
||||
k := Kubernetes{Zones: []string{"cluster.local."}}
|
||||
@@ -268,15 +176,11 @@ func TestServeDNS(t *testing.T) {
|
||||
k.ReverseCidrs = []net.IPNet{*cidr}
|
||||
k.Federations = []Federation{{name: "fed", zone: "federal.test."}}
|
||||
k.APIConn = &APIConnServeTest{}
|
||||
k.autoPath = new(autopath.AutoPath)
|
||||
k.autoPath.HostSearchPath = []string{"hostdom.test"}
|
||||
k.interfaceAddrsFunc = localPodIP
|
||||
k.Next = testHandler(nextMWMap)
|
||||
k.Next = test.NextHandler(dns.RcodeSuccess, nil)
|
||||
|
||||
ctx := context.TODO()
|
||||
runServeDNSTests(ctx, t, dnsTestCases, k)
|
||||
runServeDNSTests(ctx, t, autopathCases, k)
|
||||
runServeDNSTests(ctx, t, autopathBareSearch, k)
|
||||
|
||||
//Set PodMode to Disabled
|
||||
k.PodMode = PodModeDisabled
|
||||
@@ -287,21 +191,10 @@ func TestServeDNS(t *testing.T) {
|
||||
//Set PodMode to Verified
|
||||
k.PodMode = PodModeVerified
|
||||
runServeDNSTests(ctx, t, podModeVerifiedCases, k)
|
||||
|
||||
// Set ndots to 2 for the ndots test cases
|
||||
k.autoPath.NDots = 2
|
||||
runServeDNSTests(ctx, t, autopath2NDotsCases, k)
|
||||
k.autoPath.NDots = defautNdots
|
||||
// Disable the NXDOMAIN override (enabled by default)
|
||||
k.autoPath.OnNXDOMAIN = dns.RcodeNameError
|
||||
runServeDNSTests(ctx, t, autopathCases, k)
|
||||
runServeDNSTests(ctx, t, autopathBareSearchExpectNameErr, k)
|
||||
|
||||
}
|
||||
|
||||
func runServeDNSTests(ctx context.Context, t *testing.T, dnsTestCases map[string](*test.Case), k Kubernetes) {
|
||||
for testname, tc := range dnsTestCases {
|
||||
testname = "\nTest Case \"" + testname + "\""
|
||||
r := tc.Msg()
|
||||
|
||||
w := dnsrecorder.New(&test.ResponseWriter{})
|
||||
@@ -316,6 +209,9 @@ func runServeDNSTests(ctx context.Context, t *testing.T, dnsTestCases map[string
|
||||
}
|
||||
|
||||
resp := w.Msg
|
||||
if resp == nil {
|
||||
t.Fatalf("got nil message and no error for %q: %s %d", testname, r.Question[0].Name, r.Question[0].Qtype)
|
||||
}
|
||||
|
||||
// Before sorting, make sure that CNAMES do not appear after their target records
|
||||
for i, c := range resp.Answer {
|
||||
@@ -355,48 +251,6 @@ func runServeDNSTests(ctx context.Context, t *testing.T, dnsTestCases map[string
|
||||
}
|
||||
}
|
||||
|
||||
// next middleware question->answer map
|
||||
|
||||
var nextMWMap = map[dns.Question]dns.Msg{
|
||||
{Name: "test1.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
|
||||
Answer: []dns.RR{test.A("test1.hostdom.test. 0 IN A 11.22.33.44")},
|
||||
},
|
||||
{Name: "test2.interwebs.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
|
||||
Answer: []dns.RR{test.A("test2.interwebs. 0 IN A 55.66.77.88")},
|
||||
},
|
||||
{Name: "test2.interwebs.", Qtype: dns.TypeAAAA, Qclass: dns.ClassINET}: {
|
||||
Answer: []dns.RR{test.AAAA("test2.interwebs. 0 IN AAAA 5555:6666:7777::8888")},
|
||||
},
|
||||
{Name: "foo.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
|
||||
Answer: []dns.RR{test.A("foo.hostdom.test. 0 IN A 11.22.33.44")},
|
||||
},
|
||||
{Name: "foo.foo.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
|
||||
Answer: []dns.RR{test.A("foo.foo.hostdom.test. 0 IN A 11.22.33.44")},
|
||||
},
|
||||
{Name: "foo.foo.foo.hostdom.test.", Qtype: dns.TypeA, Qclass: dns.ClassINET}: {
|
||||
Answer: []dns.RR{test.A("foo.foo.foo.hostdom.test. 0 IN A 11.22.33.44")},
|
||||
},
|
||||
}
|
||||
|
||||
// testHandler returns a Handler that returns an answer for the question in the
|
||||
// request per the question->answer map qMap.
|
||||
func testHandler(qMap map[dns.Question]dns.Msg) test.Handler {
|
||||
return test.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
|
||||
m := new(dns.Msg)
|
||||
m.SetReply(r)
|
||||
msg, ok := qMap[r.Question[0]]
|
||||
if !ok {
|
||||
r.Rcode = dns.RcodeNameError
|
||||
return dns.RcodeNameError, nil
|
||||
}
|
||||
r.Rcode = dns.RcodeSuccess
|
||||
m.Answer = append(m.Answer, msg.Answer...)
|
||||
m.Extra = append(m.Extra, msg.Extra...)
|
||||
w.WriteMsg(m)
|
||||
return dns.RcodeSuccess, nil
|
||||
})
|
||||
}
|
||||
|
||||
type APIConnServeTest struct{}
|
||||
|
||||
func (APIConnServeTest) Run() { return }
|
||||
|
||||
@@ -660,14 +660,6 @@ func localPodIP() net.IP {
|
||||
return nil
|
||||
}
|
||||
|
||||
func splitSearch(zone, question, namespace string) (name, search string, ok bool) {
|
||||
search = strings.Join([]string{namespace, Svc, zone}, ".")
|
||||
if dns.IsSubDomain(search, question) {
|
||||
return question[:len(question)-len(search)-1], search, true
|
||||
}
|
||||
return "", "", false
|
||||
}
|
||||
|
||||
const (
|
||||
// Svc is the DNS schema for kubernetes services
|
||||
Svc = "svc"
|
||||
|
||||
@@ -459,29 +459,4 @@ func TestServices(t *testing.T) {
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
func TestSplitSearchPath(t *testing.T) {
|
||||
type testCase struct {
|
||||
question string
|
||||
namespace string
|
||||
expectedName string
|
||||
expectedSearch string
|
||||
expectedOk bool
|
||||
}
|
||||
tests := []testCase{
|
||||
{question: "test.blah.com", namespace: "ns1", expectedName: "", expectedSearch: "", expectedOk: false},
|
||||
{question: "foo.com.ns2.svc.interwebs.nets", namespace: "ns1", expectedName: "", expectedSearch: "", expectedOk: false},
|
||||
{question: "foo.com.svc.interwebs.nets", namespace: "ns1", expectedName: "", expectedSearch: "", expectedOk: false},
|
||||
{question: "foo.com.ns1.svc.interwebs.nets", namespace: "ns1", expectedName: "foo.com", expectedSearch: "ns1.svc.interwebs.nets", expectedOk: true},
|
||||
}
|
||||
zone := "interwebs.nets"
|
||||
for _, c := range tests {
|
||||
name, search, ok := splitSearch(zone, c.question, c.namespace)
|
||||
if c.expectedName != name || c.expectedSearch != search || c.expectedOk != ok {
|
||||
t.Errorf("Case %v: Expected name'%v', search:'%v', ok:'%v'. Got name:'%v', search:'%v', ok:'%v'.", c.question, c.expectedName, c.expectedSearch, c.expectedOk, name, search, ok)
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user