Retry a small amount of times when checking nginx output

This can fail in rare cases, because we only check for the service to
be ready, at which point some initial requests may still fail.

Author: href

pkg/internal/integration/service_test.go

@@ -375,7 +375,10 @@ func (s *IntegrationTestSuite) TestServiceVIPAddresses() {
 
 	cmd := exec.Command(
 		"ssh", fmt.Sprintf("ubuntu@%s", public), "-i", s.sshkey,
-		fmt.Sprintf("curl -s http://%s", addr),
+		fmt.Sprintf(
+			"curl -s --retry 3 --retry-delay 3 --retry-all-errors http://%s",
+			addr,
+		),
 	)
 	out, err := cmd.Output()
 	s.Require().NoError(err)