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Http2

Scenario

Users can easily enable Http2 protocol for better performance through configuration.

External Service Communication Configuration

The configuration for external service communication is in the microservice.yaml file.

  • Enable h2(Http2 + TLS)

    Append sslEnabled=true to the listening address to enable TLS communication on server side. For details, see the section Using TLS Communication. Then add protocol=http2 to enable h2 communication. Here is the sample configuration:

yaml servicecomb: rest: address: 0.0.0.0:8080?sslEnabled=true&protocol=http2

  • Enable h2c(Http2 without TLS)

    Simply add protocol=http2 to enable h2c communication in the server's configuration:

yaml servicecomb: rest: address: 0.0.0.0:8080?protocol=http2 * The client will read the server's address configuration from service center, then communicate with the server by http2 protocol.

Specific examples can refer to http2-it-tests

http2 server configuration

configuration default description notice
servicecomb.rest.server.http2.useAlpnEnabled true Whether to enable ALPN
servicecomb.rest.server.http2.HeaderTableSize 4096
servicecomb.rest.server.http2.pushEnabled true
servicecomb.rest.server.http2.initialWindowSize 65535
servicecomb.rest.server.http2.maxFrameSize 16384
servicecomb.rest.server.http2.maxHeaderListSize Integer.MAX_VALUE
servicecomb.rest.server.http2.concurrentStreams 100 The maximum stream concurrency supported in a connection The smaller value of the concurrentStreams on the server side and the multiplexingLimit on the client side

http2 client configuration

configuration default description notice
servicecomb.rest.client.http2.useAlpnEnabled true Whether to enable ALPN
servicecomb.rest.client.http2.multiplexingLimit -1 The maximum stream concurrency supported in a connection,-1 means no limit The smaller value of the concurrentStreams on the server side and the multiplexingLimit on the client side
servicecomb.rest.client.http2.maxPoolSize 1 The maximum number of connections established for each IP:Port in each connection pool
servicecomb.rest.client.http2.idleTimeoutInSeconds 0 The timeout period of the idle connection, the connection will be closed after the timeout