Configuration reference Bootstrap configurationUpgrading from v1 configurationAggregated Discovery ServiceStatistics Listeners Listener discovery service (LDS) Original DestinationTLS Inspector Client TLS authenticationExternal AuthorizationRate limitRedis proxyThrift proxy HTTP connection manager Traffic Shifting/SplittingStatisticsRoute discovery service (RDS) BufferDynamoDBFault InjectiongRPC-JSON transcoderGzipEnvoy Header-To-Metadata FilterJWT AuthenticationRate limitRouter Thrift filters Router StatisticsCluster discovery service Health checkers Access logging Format RulesDefault Format StringCommand Operators gRPC service IDL File system layoutUpdating runtime values via symbolic link swap Statistics File system Overload manager Overload actions Secret discovery service (SDS) SDS ConfigurationExamples two: SDS server