[VOL-4289] Proto changes for gRPC migration
Change-Id: I317a0a865ccf78d0c37aa229c50d293a3f66c8bb
diff --git a/vendor/google.golang.org/grpc/internal/xds/env/env.go b/vendor/google.golang.org/grpc/internal/xds/env/env.go
new file mode 100644
index 0000000..b171ac9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/internal/xds/env/env.go
@@ -0,0 +1,95 @@
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package env acts a single source of definition for all environment variables
+// related to the xDS implementation in gRPC.
+package env
+
+import (
+ "os"
+ "strings"
+)
+
+const (
+ // BootstrapFileNameEnv is the env variable to set bootstrap file name.
+ // Do not use this and read from env directly. Its value is read and kept in
+ // variable BootstrapFileName.
+ //
+ // When both bootstrap FileName and FileContent are set, FileName is used.
+ BootstrapFileNameEnv = "GRPC_XDS_BOOTSTRAP"
+ // BootstrapFileContentEnv is the env variable to set bootstrapp file
+ // content. Do not use this and read from env directly. Its value is read
+ // and kept in variable BootstrapFileName.
+ //
+ // When both bootstrap FileName and FileContent are set, FileName is used.
+ BootstrapFileContentEnv = "GRPC_XDS_BOOTSTRAP_CONFIG"
+
+ ringHashSupportEnv = "GRPC_XDS_EXPERIMENTAL_ENABLE_RING_HASH"
+ clientSideSecuritySupportEnv = "GRPC_XDS_EXPERIMENTAL_SECURITY_SUPPORT"
+ aggregateAndDNSSupportEnv = "GRPC_XDS_EXPERIMENTAL_ENABLE_AGGREGATE_AND_LOGICAL_DNS_CLUSTER"
+ retrySupportEnv = "GRPC_XDS_EXPERIMENTAL_ENABLE_RETRY"
+ rbacSupportEnv = "GRPC_XDS_EXPERIMENTAL_ENABLE_RBAC"
+
+ c2pResolverSupportEnv = "GRPC_EXPERIMENTAL_GOOGLE_C2P_RESOLVER"
+ c2pResolverTestOnlyTrafficDirectorURIEnv = "GRPC_TEST_ONLY_GOOGLE_C2P_RESOLVER_TRAFFIC_DIRECTOR_URI"
+)
+
+var (
+ // BootstrapFileName holds the name of the file which contains xDS bootstrap
+ // configuration. Users can specify the location of the bootstrap file by
+ // setting the environment variable "GRPC_XDS_BOOTSTRAP".
+ //
+ // When both bootstrap FileName and FileContent are set, FileName is used.
+ BootstrapFileName = os.Getenv(BootstrapFileNameEnv)
+ // BootstrapFileContent holds the content of the xDS bootstrap
+ // configuration. Users can specify the bootstrap config by
+ // setting the environment variable "GRPC_XDS_BOOTSTRAP_CONFIG".
+ //
+ // When both bootstrap FileName and FileContent are set, FileName is used.
+ BootstrapFileContent = os.Getenv(BootstrapFileContentEnv)
+ // RingHashSupport indicates whether ring hash support is enabled, which can
+ // be disabled by setting the environment variable
+ // "GRPC_XDS_EXPERIMENTAL_ENABLE_RING_HASH" to "false".
+ RingHashSupport = !strings.EqualFold(os.Getenv(ringHashSupportEnv), "false")
+ // ClientSideSecuritySupport is used to control processing of security
+ // configuration on the client-side.
+ //
+ // Note that there is no env var protection for the server-side because we
+ // have a brand new API on the server-side and users explicitly need to use
+ // the new API to get security integration on the server.
+ ClientSideSecuritySupport = !strings.EqualFold(os.Getenv(clientSideSecuritySupportEnv), "false")
+ // AggregateAndDNSSupportEnv indicates whether processing of aggregated
+ // cluster and DNS cluster is enabled, which can be enabled by setting the
+ // environment variable
+ // "GRPC_XDS_EXPERIMENTAL_ENABLE_AGGREGATE_AND_LOGICAL_DNS_CLUSTER" to
+ // "true".
+ AggregateAndDNSSupportEnv = strings.EqualFold(os.Getenv(aggregateAndDNSSupportEnv), "true")
+
+ // RetrySupport indicates whether xDS retry is enabled.
+ RetrySupport = !strings.EqualFold(os.Getenv(retrySupportEnv), "false")
+
+ // RBACSupport indicates whether xDS configured RBAC HTTP Filter is enabled.
+ RBACSupport = strings.EqualFold(os.Getenv(rbacSupportEnv), "true")
+
+ // C2PResolverSupport indicates whether support for C2P resolver is enabled.
+ // This can be enabled by setting the environment variable
+ // "GRPC_EXPERIMENTAL_GOOGLE_C2P_RESOLVER" to "true".
+ C2PResolverSupport = strings.EqualFold(os.Getenv(c2pResolverSupportEnv), "true")
+ // C2PResolverTestOnlyTrafficDirectorURI is the TD URI for testing.
+ C2PResolverTestOnlyTrafficDirectorURI = os.Getenv(c2pResolverTestOnlyTrafficDirectorURIEnv)
+)