1.4.0 (August 24, 2017)

    • YAML is now directly supported for config files.

    • Added /routes admin endpoint.

    • End-to-end flow control is now supported for TCP proxy, HTTP/1, and HTTP/2. HTTP flow control that includes filter buffering is incomplete and will be implemented in 1.5.0.

    • Log verbosity compile time flag added.

    • Hot restart added.

    • Original destination cluster and added.

    • WebSocket is now supported.

    • Virtual cluster priorities have been hard removed without deprecation as we are reasonably sure no one is using this feature.

    • Route option added.

    • header added.

    • HTTP/2 codec settings are now configurable.

    • gRPC/JSON transcoder filter added.

    • gRPC web added.

    • Configurable timeout for the rate limit service call in the network and rate limit filters.

    • x-envoy-retry-grpc-on header added.

    • added.

    • TLS :require_client_certificate option added.

    • Configuration check tool added.

    • added.

    • Config validation mode added via the --mode option.

    • UDP statsd_ip_address option added.

    • Per-cluster DNS resolvers added.

    • enhancements and fixes.

    • Several features are deprecated as of the 1.4.0 release. They will be removed at the beginning of the 1.5.0 release cycle. We explicitly call out that the HttpFilterConfigFactory filter API has been deprecated in favor of NamedHttpFilterConfigFactory.

    • Many small bug fixes and performance improvements not listed.

    Deprecated

    • Config option statsd_local_udp_port has been deprecated and has been replaced with statsd_udp_ip_address.

    • HttpFilterConfigFactory filter API has been deprecated in favor of NamedHttpFilterConfigFactory.

    • Config option has been deprecated and has been replaced with http2_settings.

    • The following log macros have been deprecated: log_trace, log_debug, conn_log, conn_log_info, conn_log_debug, conn_log_trace, stream_log, , stream_log_debug, stream_log_trace. For replacements, please see logger.h.

    • The connectionId() and ssl() callbacks of StreamFilterCallbacks have been deprecated and replaced with a more general connection() callback, which, when not returning a nullptr, can be used to get the connection id and SSL connection from the returned Connection object pointer.

    • The protobuf stub gRPC support via Grpc::RpcChannelImpl is now replaced with Grpc::AsyncClientImpl. This no longer uses protoc generated stubs but instead utilizes C++ template generation of the RPC stubs. Grpc::AsyncClientImpl supports streaming, in addition to the previous unary, RPCs.