Merge branch 'master' into interceptors

3 files changed, 1205 insertions, 971 deletions

diff --git a/tools/run_tests/generated/lb_interop_test_scenarios.json b/tools/run_tests/generated/lb_interop_test_scenarios.json
new file mode 100644
index 0000000000..4f956c568a
--- /dev/null
+++ b/tools/run_tests/generated/lb_interop_test_scenarios.json
@@ -0,0 +1,1167 @@
+
+[
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_nx_domain_insecure", 
+        "skip_langs": [], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_nx_domain_alts", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_nx_domain_tls", 
+        "skip_langs": [], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_nx_domain_google_default_credentials", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": true, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_no_data_insecure", 
+        "skip_langs": [], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": true, 
+        "fallback_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_no_data_alts", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": true, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_no_data_tls", 
+        "skip_langs": [], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [], 
+        "cause_no_error_no_data_for_balancer_a_record": true, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "no_balancer_because_lb_a_record_returns_no_data_google_default_credentials", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_insecure_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_alts_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_tls_short_stream_True", 
+        "skip_langs": [
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_google_default_credentials_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_insecure_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_alts_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_tls_short_stream_False", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_google_default_credentials_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_referred_to_backend_fallback_broken_alts_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_referred_to_backend_fallback_broken_tls_short_stream_True", 
+        "skip_langs": [
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_referred_to_backend_fallback_broken_google_default_credentials_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_referred_to_backend_fallback_broken_alts_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_referred_to_backend_fallback_broken_tls_short_stream_False", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_referred_to_backend_fallback_broken_google_default_credentials_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_insecure_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_alts_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_tls_short_stream_True", 
+        "skip_langs": [
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_google_default_credentials_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }, 
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_insecure_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_alts_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }, 
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_tls_short_stream_False", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }, 
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_backends_google_default_credentials_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_insecure_short_stream_True", 
+        "skip_langs": [
+            "go", 
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_alts_short_stream_True", 
+        "skip_langs": [
+            "go", 
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_tls_short_stream_True", 
+        "skip_langs": [
+            "go", 
+            "java", 
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_google_default_credentials_short_stream_True", 
+        "skip_langs": [
+            "go", 
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_insecure_short_stream_False", 
+        "skip_langs": [
+            "go", 
+            "java"
+        ], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_alts_short_stream_False", 
+        "skip_langs": [
+            "go", 
+            "java"
+        ], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_tls_short_stream_False", 
+        "skip_langs": [
+            "go", 
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "client_falls_back_because_no_backends_google_default_credentials_short_stream_False", 
+        "skip_langs": [
+            "go", 
+            "java"
+        ], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "name": "client_falls_back_because_balancer_connection_broken_alts", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "client_falls_back_because_balancer_connection_broken_tls", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "name": "client_falls_back_because_balancer_connection_broken_google_default_credentials", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_insecure_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_alts_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_tls_short_stream_True", 
+        "skip_langs": [
+            "java", 
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": true, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_google_default_credentials_short_stream_True", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "google_default_credentials"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "insecure"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "insecure"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_insecure_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "insecure"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_alts_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "alts"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "tls"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "tls"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_tls_short_stream_False", 
+        "skip_langs": [
+            "java"
+        ], 
+        "transport_sec": "tls"
+    }, 
+    {
+        "backend_configs": [
+            {
+                "transport_sec": "alts"
+            }
+        ], 
+        "balancer_configs": [
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }, 
+            {
+                "short_stream": false, 
+                "transport_sec": "alts"
+            }
+        ], 
+        "cause_no_error_no_data_for_balancer_a_record": false, 
+        "fallback_configs": [], 
+        "name": "client_referred_to_backend_multiple_balancers_google_default_credentials_short_stream_False", 
+        "skip_langs": [], 
+        "transport_sec": "google_default_credentials"
+    }
+]
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index a2240d28ce..ab5a9db8ef 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -6579,24 +6579,6 @@
   }, 
   {
     "deps": [
-      "end2end_nosec_tests", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc_test_util_unsecure", 
-      "grpc_unsecure"
-    ], 
-    "headers": [], 
-    "is_filegroup": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "src": [
-      "test/core/end2end/fixtures/inproc.cc"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
-  {
-    "deps": [
       "gpr", 
       "gpr_test_util", 
       "grpc++_test_config", 
@@ -10006,7 +9988,8 @@
     "deps": [
       "gpr", 
       "grpc_base", 
-      "grpc_deadline_filter"
+      "grpc_deadline_filter", 
+      "health_proto"
     ], 
     "headers": [
       "src/core/ext/filters/client_channel/backup_poller.h", 
@@ -10014,6 +9997,7 @@
       "src/core/ext/filters/client_channel/client_channel_channelz.h", 
       "src/core/ext/filters/client_channel/client_channel_factory.h", 
       "src/core/ext/filters/client_channel/connector.h", 
+      "src/core/ext/filters/client_channel/health/health_check_client.h", 
       "src/core/ext/filters/client_channel/http_connect_handshaker.h", 
       "src/core/ext/filters/client_channel/http_proxy.h", 
       "src/core/ext/filters/client_channel/lb_policy.h", 
@@ -10047,6 +10031,8 @@
       "src/core/ext/filters/client_channel/client_channel_plugin.cc", 
       "src/core/ext/filters/client_channel/connector.cc", 
       "src/core/ext/filters/client_channel/connector.h", 
+      "src/core/ext/filters/client_channel/health/health_check_client.cc", 
+      "src/core/ext/filters/client_channel/health/health_check_client.h", 
       "src/core/ext/filters/client_channel/http_connect_handshaker.cc", 
       "src/core/ext/filters/client_channel/http_connect_handshaker.h", 
       "src/core/ext/filters/client_channel/http_proxy.cc", 
@@ -10481,11 +10467,14 @@
       "src/core/lib/security/credentials/oauth2/oauth2_credentials.h", 
       "src/core/lib/security/credentials/plugin/plugin_credentials.h", 
       "src/core/lib/security/credentials/ssl/ssl_credentials.h", 
-      "src/core/lib/security/security_connector/alts_security_connector.h", 
+      "src/core/lib/security/security_connector/alts/alts_security_connector.h", 
+      "src/core/lib/security/security_connector/fake/fake_security_connector.h", 
       "src/core/lib/security/security_connector/load_system_roots.h", 
       "src/core/lib/security/security_connector/load_system_roots_linux.h", 
-      "src/core/lib/security/security_connector/local_security_connector.h", 
+      "src/core/lib/security/security_connector/local/local_security_connector.h", 
       "src/core/lib/security/security_connector/security_connector.h", 
+      "src/core/lib/security/security_connector/ssl/ssl_security_connector.h", 
+      "src/core/lib/security/security_connector/ssl_utils.h", 
       "src/core/lib/security/transport/auth_filters.h", 
       "src/core/lib/security/transport/secure_endpoint.h", 
       "src/core/lib/security/transport/security_handshaker.h", 
@@ -10531,16 +10520,22 @@
       "src/core/lib/security/credentials/plugin/plugin_credentials.h", 
       "src/core/lib/security/credentials/ssl/ssl_credentials.cc", 
       "src/core/lib/security/credentials/ssl/ssl_credentials.h", 
-      "src/core/lib/security/security_connector/alts_security_connector.cc", 
-      "src/core/lib/security/security_connector/alts_security_connector.h", 
+      "src/core/lib/security/security_connector/alts/alts_security_connector.cc", 
+      "src/core/lib/security/security_connector/alts/alts_security_connector.h", 
+      "src/core/lib/security/security_connector/fake/fake_security_connector.cc", 
+      "src/core/lib/security/security_connector/fake/fake_security_connector.h", 
       "src/core/lib/security/security_connector/load_system_roots.h", 
       "src/core/lib/security/security_connector/load_system_roots_fallback.cc", 
       "src/core/lib/security/security_connector/load_system_roots_linux.cc", 
       "src/core/lib/security/security_connector/load_system_roots_linux.h", 
-      "src/core/lib/security/security_connector/local_security_connector.cc", 
-      "src/core/lib/security/security_connector/local_security_connector.h", 
+      "src/core/lib/security/security_connector/local/local_security_connector.cc", 
+      "src/core/lib/security/security_connector/local/local_security_connector.h", 
       "src/core/lib/security/security_connector/security_connector.cc", 
       "src/core/lib/security/security_connector/security_connector.h", 
+      "src/core/lib/security/security_connector/ssl/ssl_security_connector.cc", 
+      "src/core/lib/security/security_connector/ssl/ssl_security_connector.h", 
+      "src/core/lib/security/security_connector/ssl_utils.cc", 
+      "src/core/lib/security/security_connector/ssl_utils.h", 
       "src/core/lib/security/transport/auth_filters.h", 
       "src/core/lib/security/transport/client_auth_filter.cc", 
       "src/core/lib/security/transport/secure_endpoint.cc", 
@@ -11019,6 +11014,23 @@
   }, 
   {
     "deps": [
+      "nanopb"
+    ], 
+    "headers": [
+      "src/core/ext/filters/client_channel/health/health.pb.h"
+    ], 
+    "is_filegroup": true, 
+    "language": "c", 
+    "name": "health_proto", 
+    "src": [
+      "src/core/ext/filters/client_channel/health/health.pb.c", 
+      "src/core/ext/filters/client_channel/health/health.pb.h"
+    ], 
+    "third_party": false, 
+    "type": "filegroup"
+  }, 
+  {
+    "deps": [
       "nanopb_headers"
     ], 
     "headers": [], 
@@ -11318,6 +11330,7 @@
       "grpc++_codegen_base", 
       "grpc_base_headers", 
       "grpc_transport_inproc_headers", 
+      "health_proto", 
       "nanopb_headers"
     ], 
     "headers": [
@@ -11418,7 +11431,6 @@
       "src/cpp/common/channel_filter.h", 
       "src/cpp/server/dynamic_thread_pool.h", 
       "src/cpp/server/health/default_health_check_service.h", 
-      "src/cpp/server/health/health.pb.h", 
       "src/cpp/server/thread_pool_interface.h", 
       "src/cpp/thread_manager/thread_manager.h"
     ], 
@@ -11543,8 +11555,6 @@
       "src/cpp/server/dynamic_thread_pool.h", 
       "src/cpp/server/health/default_health_check_service.cc", 
       "src/cpp/server/health/default_health_check_service.h", 
-      "src/cpp/server/health/health.pb.c", 
-      "src/cpp/server/health/health.pb.h", 
       "src/cpp/server/health/health_check_service.cc", 
       "src/cpp/server/health/health_check_service_server_builder_option.cc", 
       "src/cpp/server/server_builder.cc", 
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 4099204694..1052666634 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -56290,949 +56290,6 @@
   }, 
   {
     "args": [
-      "authority_not_supported"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "binary_metadata"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_after_accept"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_after_client_done"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_after_invoke"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_after_round_trip"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_before_invoke"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_in_a_vacuum"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "cancel_with_status"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "channelz"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "exclude_iomgrs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "inproc_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "empty_batch"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
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