VictoriaMetrics/vendor/google.golang.org/grpc/internal/envconfig/xds.go

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/*
*
* 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.
*
*/
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package envconfig
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import (
"os"
"strings"
)
const (
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// XDSBootstrapFileNameEnv is the env variable to set bootstrap file name.
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// 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.
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XDSBootstrapFileNameEnv = "GRPC_XDS_BOOTSTRAP"
// XDSBootstrapFileContentEnv is the env variable to set bootstrapp file
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// 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.
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XDSBootstrapFileContentEnv = "GRPC_XDS_BOOTSTRAP_CONFIG"
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ringHashSupportEnv = "GRPC_XDS_EXPERIMENTAL_ENABLE_RING_HASH"
clientSideSecuritySupportEnv = "GRPC_XDS_EXPERIMENTAL_SECURITY_SUPPORT"
aggregateAndDNSSupportEnv = "GRPC_XDS_EXPERIMENTAL_ENABLE_AGGREGATE_AND_LOGICAL_DNS_CLUSTER"
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rbacSupportEnv = "GRPC_XDS_EXPERIMENTAL_RBAC"
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federationEnv = "GRPC_EXPERIMENTAL_XDS_FEDERATION"
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rlsInXDSEnv = "GRPC_EXPERIMENTAL_XDS_RLS_LB"
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c2pResolverTestOnlyTrafficDirectorURIEnv = "GRPC_TEST_ONLY_GOOGLE_C2P_RESOLVER_TRAFFIC_DIRECTOR_URI"
)
var (
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// XDSBootstrapFileName 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".
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//
// When both bootstrap FileName and FileContent are set, FileName is used.
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XDSBootstrapFileName = os.Getenv(XDSBootstrapFileNameEnv)
// XDSBootstrapFileContent holds the content of the xDS bootstrap
// configuration. Users can specify the bootstrap config by setting the
// environment variable "GRPC_XDS_BOOTSTRAP_CONFIG".
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//
// When both bootstrap FileName and FileContent are set, FileName is used.
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XDSBootstrapFileContent = os.Getenv(XDSBootstrapFileContentEnv)
// XDSRingHash indicates whether ring hash support is enabled, which can be
// disabled by setting the environment variable
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// "GRPC_XDS_EXPERIMENTAL_ENABLE_RING_HASH" to "false".
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XDSRingHash = !strings.EqualFold(os.Getenv(ringHashSupportEnv), "false")
// XDSClientSideSecurity is used to control processing of security
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// 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.
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XDSClientSideSecurity = !strings.EqualFold(os.Getenv(clientSideSecuritySupportEnv), "false")
// XDSAggregateAndDNS indicates whether processing of aggregated cluster
// and DNS cluster is enabled, which can be enabled by setting the
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// environment variable
// "GRPC_XDS_EXPERIMENTAL_ENABLE_AGGREGATE_AND_LOGICAL_DNS_CLUSTER" to
// "true".
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XDSAggregateAndDNS = strings.EqualFold(os.Getenv(aggregateAndDNSSupportEnv), "true")
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// XDSRBAC indicates whether xDS configured RBAC HTTP Filter is enabled,
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// which can be disabled by setting the environment variable
// "GRPC_XDS_EXPERIMENTAL_RBAC" to "false".
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XDSRBAC = !strings.EqualFold(os.Getenv(rbacSupportEnv), "false")
// XDSFederation indicates whether federation support is enabled.
XDSFederation = strings.EqualFold(os.Getenv(federationEnv), "true")
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// XDSRLS indicates whether processing of Cluster Specifier plugins and
// support for the RLS CLuster Specifier is enabled, which can be enabled by
// setting the environment variable "GRPC_EXPERIMENTAL_XDS_RLS_LB" to
// "true".
XDSRLS = strings.EqualFold(os.Getenv(rlsInXDSEnv), "true")
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// C2PResolverTestOnlyTrafficDirectorURI is the TD URI for testing.
C2PResolverTestOnlyTrafficDirectorURI = os.Getenv(c2pResolverTestOnlyTrafficDirectorURIEnv)
)