Setup External Communication Channels

SkyWalking has default activated gRPC/HTTP servers in the core module, which serve for both internal communication and external data report or query.

In some advanced scenarios, such as security requirements, specific gRPC/HTTP servers should be exposed for external requests.

receiver-sharing-server:  selector: ${SW_RECEIVER_SHARING_SERVER:default}  default:  # For REST server  restHost: ${SW_RECEIVER_SHARING_REST_HOST:0.0.0.0}  restPort: ${SW_RECEIVER_SHARING_REST_PORT:0}  restContextPath: ${SW_RECEIVER_SHARING_REST_CONTEXT_PATH:/}  restMaxThreads: ${SW_RECEIVER_SHARING_REST_MAX_THREADS:200}  restIdleTimeOut: ${SW_RECEIVER_SHARING_REST_IDLE_TIMEOUT:30000}  restAcceptQueueSize: ${SW_RECEIVER_SHARING_REST_QUEUE_SIZE:0}  httpMaxRequestHeaderSize: ${SW_RECEIVER_SHARING_HTTP_MAX_REQUEST_HEADER_SIZE:8192}  # For gRPC server  gRPCHost: ${SW_RECEIVER_GRPC_HOST:0.0.0.0}  gRPCPort: ${SW_RECEIVER_GRPC_PORT:0}  maxConcurrentCallsPerConnection: ${SW_RECEIVER_GRPC_MAX_CONCURRENT_CALL:0}  maxMessageSize: ${SW_RECEIVER_GRPC_MAX_MESSAGE_SIZE:52428800} #50MB  gRPCThreadPoolSize: ${SW_RECEIVER_GRPC_THREAD_POOL_SIZE:0}  gRPCSslEnabled: ${SW_RECEIVER_GRPC_SSL_ENABLED:false}  gRPCSslKeyPath: ${SW_RECEIVER_GRPC_SSL_KEY_PATH:""}  gRPCSslCertChainPath: ${SW_RECEIVER_GRPC_SSL_CERT_CHAIN_PATH:""}  gRPCSslTrustedCAsPath: ${SW_RECEIVER_GRPC_SSL_TRUSTED_CAS_PATH:""}  authentication: ${SW_AUTHENTICATION:""}

Set restPort(HTTP) and gRPCPort(gRPC) to a legal port(greater than 0), would initialize new gRPC/HTTP servers for external requests with other relative settings. In this case, core/gRPC and core/rest could be served for cluster internal communication only.