Add retry on 401 and 403 for runner-registration (#3377)

Co-authored-by: Francesco Renzi <rentziass@gmail.com>

github/actions/client.go

@@ -975,20 +975,38 @@ func (c *Client) getActionsServiceAdminConnection(ctx context.Context, rt *regis
 
 	c.logger.Info("getting Actions tenant URL and JWT", "registrationURL", req.URL.String())
 
-	resp, err := c.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
+	var resp *http.Response
+	retry := 0
+	for {
+		var err error
+		resp, err = c.Do(req)
+		if err != nil {
+			return nil, err
+		}
+		defer resp.Body.Close()
 
-	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		registrationErr := fmt.Errorf("unexpected response from Actions service during registration call: %v", resp.StatusCode)
+		if resp.StatusCode >= 200 && resp.StatusCode <= 299 {
+			break
+		}
 
+		errStr := fmt.Sprintf("unexpected response from Actions service during registration call: %v", resp.StatusCode)
 		body, err := io.ReadAll(resp.Body)
 		if err != nil {
-			return nil, fmt.Errorf("%v - %v", registrationErr, err)
+			err = fmt.Errorf("%s - %w", errStr, err)
+		} else {
+			err = fmt.Errorf("%s - %v", errStr, string(body))
 		}
-		return nil, fmt.Errorf("%v - %v", registrationErr, string(body))
+
+		if resp.StatusCode != http.StatusUnauthorized && resp.StatusCode != http.StatusForbidden {
+			return nil, err
+		}
+
+		retry++
+		if retry > 3 {
+			return nil, fmt.Errorf("unable to register runner after 3 retries: %v", err)
+		}
+		time.Sleep(time.Duration(500 * int(time.Millisecond) * (retry + 1)))
+
 	}
 
 	var actionsServiceAdminConnection *ActionsServiceAdminConnection

github/actions/github_api_request_test.go

@@ -2,6 +2,7 @@ package actions_test
 
 import (
 	"context"
+	"encoding/json"
 	"io"
 	"net/http"
 	"net/url"
@@ -152,6 +153,43 @@ func TestNewActionsServiceRequest(t *testing.T) {
 			assert.Equal(t, client.ActionsServiceAdminTokenExpiresAt, expiresAt)
 		})
 
+		t.Run("admin token refresh retry", func(t *testing.T) {
+			newToken := defaultActionsToken(t)
+			errMessage := `{"message":"test"}`
+
+			srv := "http://github.com/my-org"
+			resp := &actions.ActionsServiceAdminConnection{
+				AdminToken:        &newToken,
+				ActionsServiceUrl: &srv,
+			}
+			failures := 0
+			unauthorizedHandler := func(w http.ResponseWriter, r *http.Request) {
+				if failures < 2 {
+					failures++
+					w.Header().Set("Content-Type", "application/json")
+					w.WriteHeader(http.StatusUnauthorized)
+					w.Write([]byte(errMessage))
+					return
+				}
+
+				w.WriteHeader(http.StatusCreated)
+				_ = json.NewEncoder(w).Encode(resp)
+			}
+			server := testserver.New(t, nil, testserver.WithActionsToken("random-token"), testserver.WithActionsToken(newToken), testserver.WithActionsRegistrationTokenHandler(unauthorizedHandler))
+			client, err := actions.NewClient(server.ConfigURLForOrg("my-org"), defaultCreds)
+			require.NoError(t, err)
+			expiringToken := "expiring-token"
+			expiresAt := time.Now().Add(59 * time.Second)
+			client.ActionsServiceAdminToken = expiringToken
+			client.ActionsServiceAdminTokenExpiresAt = expiresAt
+
+			_, err = client.NewActionsServiceRequest(ctx, http.MethodGet, "my-path", nil)
+			require.NoError(t, err)
+			assert.Equal(t, client.ActionsServiceAdminToken, newToken)
+			assert.Equal(t, client.ActionsServiceURL, srv)
+			assert.NotEqual(t, client.ActionsServiceAdminTokenExpiresAt, expiresAt)
+		})
+
 		t.Run("token is currently valid", func(t *testing.T) {
 			tokenThatShouldNotBeFetched := defaultActionsToken(t)
 			server := testserver.New(t, nil, testserver.WithActionsToken(tokenThatShouldNotBeFetched))