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package test
import (
"io"
"io/ioutil"
"log"
"net"
"net/http"
"net/http/httptest"
"net/url"
"testing"
"github.com/coredns/coredns/plugin/proxy"
"github.com/coredns/coredns/plugin/test"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
)
func TestProxyWithHTTPCheckOK(t *testing.T) {
log.SetOutput(ioutil.Discard)
healthCheckServer := httptest.NewServer(http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
io.WriteString(w, "OK\n")
}))
defer healthCheckServer.Close()
healthCheckURL, err := url.Parse(healthCheckServer.URL)
if err != nil {
t.Fatal(err)
}
// TODO: use URL.Port() (Go 1.8+) once we've deprecated Go 1.7 support
var healthCheckPort string
if _, healthCheckPort, err = net.SplitHostPort(healthCheckURL.Host); err != nil {
healthCheckPort = "80"
}
name, rm, err := test.TempFile(".", exampleOrg)
if err != nil {
t.Fatalf("Failed to create zone: %s", err)
}
defer rm()
// We have to bind to 127.0.0.1 because the server started by
// httptest.NewServer does, and the IP addresses of the backend
// DNS and HTTP servers must match.
authoritativeCorefile := `example.org:0 {
bind 127.0.0.1
file ` + name + `
}
`
authoritativeInstance, authoritativeAddr, _, err := CoreDNSServerAndPorts(authoritativeCorefile)
if err != nil {
t.Fatalf("Could not get CoreDNS authoritative instance: %s", err)
}
defer authoritativeInstance.Stop()
proxyCorefile := `example.org:0 {
proxy . ` + authoritativeAddr + ` {
health_check /health:` + healthCheckPort + ` 1s
}
}
`
proxyInstance, proxyAddr, _, err := CoreDNSServerAndPorts(proxyCorefile)
if err != nil {
t.Fatalf("Could not get CoreDNS proxy instance: %s", err)
}
defer proxyInstance.Stop()
p := proxy.NewLookup([]string{proxyAddr})
state := request.Request{W: &test.ResponseWriter{}, Req: new(dns.Msg)}
resp, err := p.Lookup(state, "example.org.", dns.TypeA)
if err != nil {
t.Fatal("Expected to receive reply, but didn't")
}
// expect answer section with A record in it
if len(resp.Answer) == 0 {
t.Fatalf("Expected to at least one RR in the answer section, got none: %s", resp)
}
if resp.Answer[0].Header().Rrtype != dns.TypeA {
t.Errorf("Expected RR to A, got: %d", resp.Answer[0].Header().Rrtype)
}
if resp.Answer[0].(*dns.A).A.String() != "127.0.0.1" {
t.Errorf("Expected 127.0.0.1, got: %s", resp.Answer[0].(*dns.A).A.String())
}
}
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