Merge pull request #2572 from murgatroid99/grpc-js-xds_pick_first

grpc-js-xds: Add support for pick_first in xDS config

Author: murgatroid99

packages/grpc-js-xds/gulpfile.ts

@@ -63,6 +63,7 @@ const compile = checkTask(() => execNpmCommand('compile'));
 const runTests = checkTask(() => {
   process.env.GRPC_EXPERIMENTAL_XDS_FEDERATION = 'true';
   process.env.GRPC_EXPERIMENTAL_XDS_CUSTOM_LB_CONFIG = 'true';
+  process.env.GRPC_EXPERIMENTAL_PICKFIRST_LB_CONFIG = 'true';
   if (Number(process.versions.node.split('.')[0]) > 14) {
     process.env.GRPC_XDS_EXPERIMENTAL_ENABLE_RING_HASH = 'true';
   }

packages/grpc-js-xds/package.json

@@ -12,7 +12,7 @@
     "prepare": "npm run compile",
     "pretest": "npm run compile",
     "posttest": "npm run check",
-    "generate-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --includeDirs deps/envoy-api/ deps/xds/ deps/googleapis/ deps/protoc-gen-validate/ -O src/generated/ --grpcLib @grpc/grpc-js envoy/service/discovery/v3/ads.proto envoy/service/load_stats/v3/lrs.proto envoy/config/listener/v3/listener.proto envoy/config/route/v3/route.proto envoy/config/cluster/v3/cluster.proto envoy/config/endpoint/v3/endpoint.proto envoy/extensions/filters/network/http_connection_manager/v3/http_connection_manager.proto udpa/type/v1/typed_struct.proto xds/type/v3/typed_struct.proto envoy/extensions/filters/http/fault/v3/fault.proto envoy/service/status/v3/csds.proto envoy/extensions/load_balancing_policies/wrr_locality/v3/wrr_locality.proto envoy/extensions/load_balancing_policies/ring_hash/v3/ring_hash.proto",
+    "generate-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --includeDirs deps/envoy-api/ deps/xds/ deps/googleapis/ deps/protoc-gen-validate/ -O src/generated/ --grpcLib @grpc/grpc-js envoy/service/discovery/v3/ads.proto envoy/service/load_stats/v3/lrs.proto envoy/config/listener/v3/listener.proto envoy/config/route/v3/route.proto envoy/config/cluster/v3/cluster.proto envoy/config/endpoint/v3/endpoint.proto envoy/extensions/filters/network/http_connection_manager/v3/http_connection_manager.proto udpa/type/v1/typed_struct.proto xds/type/v3/typed_struct.proto envoy/extensions/filters/http/fault/v3/fault.proto envoy/service/status/v3/csds.proto envoy/extensions/load_balancing_policies/wrr_locality/v3/wrr_locality.proto envoy/extensions/load_balancing_policies/ring_hash/v3/ring_hash.proto envoy/extensions/load_balancing_policies/pick_first/v3/pick_first.proto",
     "generate-interop-types": "proto-loader-gen-types --keep-case --longs String --enums String --defaults --oneofs --json --includeComments --includeDirs proto/ -O interop/generated --grpcLib @grpc/grpc-js grpc/testing/test.proto",
     "generate-test-types": "proto-loader-gen-types --keep-case --longs String --enums String --defaults --oneofs --json --includeComments --includeDirs proto/ -O test/generated --grpcLib @grpc/grpc-js grpc/testing/echo.proto"
   },

packages/grpc-js-xds/src/environment.ts

@@ -21,3 +21,4 @@ export const EXPERIMENTAL_RETRY = (process.env.GRPC_XDS_EXPERIMENTAL_ENABLE_RETR
 export const EXPERIMENTAL_FEDERATION = (process.env.GRPC_EXPERIMENTAL_XDS_FEDERATION ?? 'false') === 'true';
 export const EXPERIMENTAL_CUSTOM_LB_CONFIG = (process.env.GRPC_EXPERIMENTAL_XDS_CUSTOM_LB_CONFIG ?? 'false') === 'true';
 export const EXPERIMENTAL_RING_HASH = (process.env.GRPC_XDS_EXPERIMENTAL_ENABLE_RING_HASH ?? 'false') === 'true';
+export const EXPERIMENTAL_PICK_FIRST = (process.env.GRPC_EXPERIMENTAL_PICKFIRST_LB_CONFIG ?? 'false') === 'true';