52e01264e8
By defining and using an proxy.Exchanger interface we make the proxy more generic and we can then fold back httproxy into proxy. This overrides #463 and #473 and should make futures extensions rather trivial * Add docs that talk about `protocol` and how to set it. * middleware/proxy: rename New to NewLookup It's used as a Lookup mechanism not as a completely new proxy, reflect that in the name. * Set maxfails to 3 by default when looking up names. Most of the changes have been copied from https://github.com/johnbelamaric/coredns/pull/1/files
108 lines
3.1 KiB
Go
108 lines
3.1 KiB
Go
// +build etcd
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package test
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import (
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"encoding/json"
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"io/ioutil"
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"log"
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"testing"
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"time"
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"github.com/miekg/coredns/middleware/etcd"
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"github.com/miekg/coredns/middleware/etcd/msg"
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"github.com/miekg/coredns/middleware/proxy"
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"github.com/miekg/coredns/middleware/test"
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"github.com/miekg/coredns/request"
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etcdc "github.com/coreos/etcd/client"
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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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func etcdMiddleware() *etcd.Etcd {
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etcdCfg := etcdc.Config{
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Endpoints: []string{"http://localhost:2379"},
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}
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cli, _ := etcdc.New(etcdCfg)
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client := etcdc.NewKeysAPI(cli)
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return &etcd.Etcd{Client: client, PathPrefix: "/skydns"}
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}
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// This test starts two coredns servers (and needs etcd). Configure a stubzones in both (that will loop) and
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// will then test if we detect this loop.
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func TestEtcdStubLoop(t *testing.T) {
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// TODO(miek)
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}
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func TestEtcdStubAndProxyLookup(t *testing.T) {
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corefile := `.:0 {
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etcd skydns.local {
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stubzones
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path /skydns
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endpoint http://localhost:2379
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upstream 8.8.8.8:53 8.8.4.4:53
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}
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proxy . 8.8.8.8:53
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}`
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ex, err := CoreDNSServer(corefile)
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if err != nil {
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t.Fatalf("Could not get CoreDNS serving instance: %s", err)
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}
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udp, _ := CoreDNSServerPorts(ex, 0)
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if udp == "" {
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t.Fatalf("Could not get UDP listening port")
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}
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defer ex.Stop()
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etc := etcdMiddleware()
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log.SetOutput(ioutil.Discard)
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var ctx = context.TODO()
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for _, serv := range servicesStub { // adds example.{net,org} as stubs
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set(ctx, t, etc, serv.Key, 0, serv)
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defer delete(ctx, t, etc, serv.Key)
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}
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p := proxy.NewLookup([]string{udp}) // use udp port from the server
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state := request.Request{W: &test.ResponseWriter{}, Req: new(dns.Msg)}
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resp, err := p.Lookup(state, "example.com.", dns.TypeA)
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if err != nil {
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t.Fatalf("Expected to receive reply, but didn't", err)
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}
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if len(resp.Answer) == 0 {
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t.Fatalf("Expected to at least one RR in the answer section, got none")
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}
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if resp.Answer[0].Header().Rrtype != dns.TypeA {
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t.Errorf("Expected RR to A, got: %d", resp.Answer[0].Header().Rrtype)
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}
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if resp.Answer[0].(*dns.A).A.String() != "93.184.216.34" {
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t.Errorf("Expected 93.184.216.34, got: %d", resp.Answer[0].(*dns.A).A.String())
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}
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}
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var servicesStub = []*msg.Service{
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// Two tests, ask a question that should return servfail because remote it no accessible
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// and one with edns0 option added, that should return refused.
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{Host: "127.0.0.1", Port: 666, Key: "b.example.org.stub.dns.skydns.test."},
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// Actual test that goes out to the internet.
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{Host: "199.43.132.53", Key: "a.example.net.stub.dns.skydns.test."},
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}
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// Copied from middleware/etcd/setup_test.go
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func set(ctx context.Context, t *testing.T, e *etcd.Etcd, k string, ttl time.Duration, m *msg.Service) {
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b, err := json.Marshal(m)
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if err != nil {
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t.Fatal(err)
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}
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path, _ := msg.PathWithWildcard(k, e.PathPrefix)
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e.Client.Set(ctx, path, string(b), &etcdc.SetOptions{TTL: ttl})
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}
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// Copied from middleware/etcd/setup_test.go
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func delete(ctx context.Context, t *testing.T, e *etcd.Etcd, k string) {
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path, _ := msg.PathWithWildcard(k, e.PathPrefix)
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e.Client.Delete(ctx, path, &etcdc.DeleteOptions{Recursive: false})
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}
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