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.

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