mirror of
https://github.com/coredns/coredns.git
synced 2025-10-27 16:24:19 -04:00
101 lines
2.7 KiB
Go
101 lines
2.7 KiB
Go
package test
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import (
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"io"
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"io/ioutil"
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"log"
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"net"
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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"github.com/coredns/coredns/middleware/proxy"
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"github.com/coredns/coredns/middleware/test"
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"github.com/coredns/coredns/request"
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"github.com/miekg/dns"
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)
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func TestProxyWithHTTPCheckOK(t *testing.T) {
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log.SetOutput(ioutil.Discard)
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healthCheckServer := httptest.NewServer(http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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io.WriteString(w, "OK\n")
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}))
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defer healthCheckServer.Close()
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healthCheckURL, err := url.Parse(healthCheckServer.URL)
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if err != nil {
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t.Fatal(err)
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}
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// TODO: use URL.Port() (Go 1.8+) once we've deprecated Go 1.7 support
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var healthCheckPort string
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if _, healthCheckPort, err = net.SplitHostPort(healthCheckURL.Host); err != nil {
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healthCheckPort = "80"
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}
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name, rm, err := test.TempFile(".", exampleOrg)
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if err != nil {
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t.Fatalf("failed to create zone: %s", err)
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}
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defer rm()
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// We have to bind to 127.0.0.1 because the server started by
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// httptest.NewServer does, and the IP addresses of the backend
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// DNS and HTTP servers must match.
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authoritativeCorefile := `example.org:0 {
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bind 127.0.0.1
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file ` + name + `
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}
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`
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authoritativeInstance, err := CoreDNSServer(authoritativeCorefile)
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if err != nil {
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t.Fatalf("Could not get CoreDNS authoritative instance: %s", err)
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}
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authoritativeAddr, _ := CoreDNSServerPorts(authoritativeInstance, 0)
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if authoritativeAddr == "" {
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t.Fatalf("Could not get CoreDNS authoritative instance UDP listening port")
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}
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defer authoritativeInstance.Stop()
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proxyCorefile := `example.org:0 {
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proxy . ` + authoritativeAddr + ` {
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health_check /health:` + healthCheckPort + ` 1s
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}
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}
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`
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proxyInstance, err := CoreDNSServer(proxyCorefile)
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if err != nil {
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t.Fatalf("Could not get CoreDNS proxy instance: %s", err)
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}
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proxyAddr, _ := CoreDNSServerPorts(proxyInstance, 0)
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if proxyAddr == "" {
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t.Fatalf("Could not get CoreDNS proxy instance UDP listening port")
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}
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defer proxyInstance.Stop()
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p := proxy.NewLookup([]string{proxyAddr})
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state := request.Request{W: &test.ResponseWriter{}, Req: new(dns.Msg)}
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resp, err := p.Lookup(state, "example.org.", dns.TypeA)
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if err != nil {
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t.Fatal("Expected to receive reply, but didn't")
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}
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// expect answer section with A record in it
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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: %s", resp)
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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() != "127.0.0.1" {
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t.Errorf("Expected 127.0.0.1, got: %s", resp.Answer[0].(*dns.A).A.String())
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}
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}
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