Respect HTTP01Timeout, improve logging

Signed-off-by: Christopher Hlubek <hlubek@networkteam.com>

pkg/issuer/acme/http/http.go

@@ -61,7 +61,16 @@ type Solver struct {
 	requiredPasses   int
 }
 
-type reachabilityTest func(ctx context.Context, domain, path, key string) (bool, error)
+type reachabilityTest func(ctx context.Context, url, key string) (bool, error)
+
+// absorbErr wraps an error to mark it as absorbable (log and handle as nil)
+type absorbErr struct {
+	err error
+}
+
+func (ae *absorbErr) Error() string {
+	return ae.err.Error()
+}
 
 // NewSolver returns a new ACME HTTP01 solver for the given Issuer and client.
 // TODO: refactor this to have fewer args
@@ -92,9 +101,15 @@ func (s *Solver) Present(ctx context.Context, issuer v1alpha1.GenericIssuer, ch
 func (s *Solver) Check(ch *v1alpha1.Challenge) (bool, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), HTTP01Timeout)
 	defer cancel()
+
+	url := s.buildChallengeUrl(ch)
+
 	for i := 0; i < s.requiredPasses; i++ {
-		ok, err := s.testReachability(ctx, ch.Spec.DNSName, fmt.Sprintf("%s/%s", solver.HTTPChallengePath, ch.Spec.Token), ch.Spec.Key)
+		ok, err := s.testReachability(ctx, url, ch.Spec.Key)
-		if err != nil {
+		if absorbedErr, wasAbsorbed := err.(*absorbErr); wasAbsorbed {
+			glog.Infof("could not reach '%s': %v", url, absorbedErr.err)
+			return false, nil
+		} else if err != nil {
 			return false, err
 		}
 		if !ok {
@@ -115,35 +130,42 @@ func (s *Solver) CleanUp(ctx context.Context, issuer v1alpha1.GenericIssuer, ch
 	return utilerrors.NewAggregate(errs)
 }
 
-// testReachability will attempt to connect to the 'domain' with 'path' and
+func (s *Solver) buildChallengeUrl(ch *v1alpha1.Challenge) string {
-// check if the returned body equals 'key'
-func testReachability(ctx context.Context, domain, path, key string) (bool, error) {
 	url := &url.URL{}
 	url.Scheme = "http"
-	url.Host = domain
+	url.Host = ch.Spec.DNSName
-	url.Path = path
+	url.Path = fmt.Sprintf("%s/%s", solver.HTTPChallengePath, ch.Spec.Token)
 
-	response, err := http.Get(url.String())
+	return url.String()
+}
+
+// testReachability will attempt to connect to the 'domain' with 'path' and
+// check if the returned body equals 'key'
+func testReachability(ctx context.Context, url string, key string) (bool, error) {
+	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
-		// absorb http client errors
+		return false, fmt.Errorf("failed to build request: %v", err)
-		return false, nil
+	}
+
+	req = req.WithContext(ctx)
+
+	response, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return false, &absorbErr{err: fmt.Errorf("failed to GET '%s': %v", url, err)}
 	}
 
 	if response.StatusCode != http.StatusOK {
-		// TODO: log this elsewhere
+		return false, &absorbErr{err: fmt.Errorf("wrong status code '%d', expected '%d'", response.StatusCode, http.StatusOK)}
-		glog.Infof("wrong status code '%d'", response.StatusCode)
-		return false, nil
 	}
 
 	defer response.Body.Close()
 	presentedKey, err := ioutil.ReadAll(response.Body)
 	if err != nil {
-		return false, err
+		return false, fmt.Errorf("failed to read response body: %v", err)
 	}
 
 	if string(presentedKey) != key {
-		glog.Infof("presented key (%s) did not match expected (%s)", presentedKey, key)
+		return false, &absorbErr{err: fmt.Errorf("presented key (%s) did not match expected (%s)", presentedKey, key)}
-		return false, nil
 	}
 
 	return true, nil

pkg/issuer/acme/http/http_test.go

@@ -27,9 +27,9 @@ import (
 // countReachabilityTestCalls is a wrapper function that allows us to count the number
 // of calls to a reachabilityTest.
 func countReachabilityTestCalls(counter *int, t reachabilityTest) reachabilityTest {
-	return func(ctx context.Context, domain, path, key string) (bool, error) {
+	return func(ctx context.Context, url, key string) (bool, error) {
 		*counter++
-		return t(ctx, domain, path, key)
+		return t(ctx, url, key)
 	}
 }
 
@@ -44,20 +44,26 @@ func TestCheck(t *testing.T) {
 	tests := []testT{
 		{
 			name: "should pass",
-			reachabilityTest: func(context.Context, string, string, string) (bool, error) {
+			reachabilityTest: func(context.Context, string, string) (bool, error) {
 				return true, nil
 			},
 			expectedOk: true,
 		},
 		{
 			name: "should fail",
-			reachabilityTest: func(context.Context, string, string, string) (bool, error) {
+			reachabilityTest: func(context.Context, string, string) (bool, error) {
 				return false, nil
 			},
 		},
+		{
+			name: "should fail with absorbed error",
+			reachabilityTest: func(context.Context, string, string) (bool, error) {
+				return false, &absorbErr{err: fmt.Errorf("failed")}
+			},
+		},
 		{
 			name: "should error",
-			reachabilityTest: func(context.Context, string, string, string) (bool, error) {
+			reachabilityTest: func(context.Context, string, string) (bool, error) {
 				return false, fmt.Errorf("failed")
 			},
 			expectedErr: true,