- access log: added fields for :ref:`UPSTREAM_LOCAL_ADDRESS and DOWNSTREAM_ADDRESS <config_access_log_format>`.
- admin: added :ref:`JSON output <operations_admin_interface_stats>` for stats admin endpoint.
- admin: added basic :ref:`Prometheus output <operations_admin_interface_stats>` for stats admin endpoint. Histograms are not currently output.
- admin: added
version_infoto the :ref:`/clusters admin endpoint<operations_admin_interface_clusters>`. - config: the :ref:`v2 API <config_overview>` is now considered production ready.
- config: added --v2-config-only CLI flag.
- cors: added :ref:`CORS filter <config_http_filters_cors>`.
- health check: added :ref:`x-envoy-immediate-health-check-fail <config_http_filters_router_x-envoy-immediate-health-check-fail>` header support.
- health check: added :ref:`reuse_connection <envoy_api_field_core.HealthCheck.reuse_connection>` option.
- http: added :ref:`per-listener stats <config_http_conn_man_stats_per_listener>`.
- http: end-to-end HTTP flow control is now complete across both connections, streams, and filters.
- load balancer: added :ref:`subset load balancer <arch_overview_load_balancer_subsets>`.
- load balancer: added ring size and hash :ref:`configuration options <envoy_api_msg_Cluster.RingHashLbConfig>`. This used to be configurable via runtime. The runtime configuration was deleted without deprecation as we are fairly certain no one is using it.
- log: added the ability to optionally log to a file instead of stderr via the :option:`--log-path` option.
- listeners: added :ref:`drain_type <envoy_api_field_Listener.drain_type>` option.
- lua: added experimental :ref:`Lua filter <config_http_filters_lua>`.
- mongo filter: added :ref:`fault injection <config_network_filters_mongo_proxy_fault_injection>`.
- mongo filter: added :ref:`"drain close" <arch_overview_draining>` support.
- outlier detection: added :ref:`HTTP gateway failure type <arch_overview_outlier_detection>`. See :ref:`deprecated log <deprecated>` for outlier detection stats deprecations in this release.
- redis: the :ref:`redis proxy filter <config_network_filters_redis_proxy>` is now considered production ready.
- redis: added :ref:`"drain close" <arch_overview_draining>` functionality.
- router: added :ref:`x-envoy-overloaded <config_http_filters_router_x-envoy-overloaded_set>` support.
- router: added :ref:`regex <envoy_api_field_route.RouteMatch.regex>` route matching.
- router: added :ref:`custom request headers <config_http_conn_man_headers_custom_request_headers>` for upstream requests.
- router: added :ref:`downstream IP hashing <envoy_api_field_route.RouteAction.HashPolicy.connection_properties>` for HTTP ketama routing.
- router: added :ref:`cookie hashing <envoy_api_field_route.RouteAction.HashPolicy.cookie>`.
- router: added :ref:`start_child_span <envoy_api_field_config.filter.http.router.v2.Router.start_child_span>` option to create child span for egress calls.
- router: added optional :ref:`upstream logs <envoy_api_field_config.filter.http.router.v2.Router.upstream_log>`.
- router: added complete :ref:`custom append/override/remove support <config_http_conn_man_headers_custom_request_headers>` of request/response headers.
- router: added support to :ref:`specify response code during redirect <envoy_api_field_route.RedirectAction.response_code>`.
- router: added :ref:`configuration <envoy_api_field_route.RouteAction.cluster_not_found_response_code>` to return either a 404 or 503 if the upstream cluster does not exist.
- runtime: added :ref:`comment capability <config_runtime_comments>`.
- server: change default log level (:option:`-l`) to info.
- stats: maximum stat/name sizes and maximum number of stats are now variable via the --max-obj-name-len and --max-stats options.
- tcp proxy: added :ref:`access logging <envoy_api_field_config.filter.network.tcp_proxy.v2.TcpProxy.access_log>`.
- tcp proxy: added :ref:`configurable connect retries <envoy_api_field_config.filter.network.tcp_proxy.v2.TcpProxy.max_connect_attempts>`.
- tcp proxy: enable use of :ref:`outlier detector <arch_overview_outlier_detection>`.
- tls: added :ref:`SNI support <faq_how_to_setup_sni>`.
- tls: added support for specifying :ref:`TLS session ticket keys <envoy_api_field_auth.DownstreamTlsContext.session_ticket_keys>`.
- tls: allow configuration of the :ref:`min <envoy_api_field_auth.TlsParameters.tls_minimum_protocol_version>` and :ref:`max <envoy_api_field_auth.TlsParameters.tls_maximum_protocol_version>` TLS protocol versions.
- tracing: added :ref:`custom trace span decorators <envoy_api_field_route.Route.decorator>`.
- Many small bug fixes and performance improvements not listed.
- The outlier detection ejections_total stats counter has been deprecated and not replaced. Monitor the individual ejections_detected_* counters for the detectors of interest, or ejections_enforced_total for the total number of ejections that actually occurred.
- The outlier detection ejections_consecutive_5xx stats counter has been deprecated in favour of ejections_detected_consecutive_5xx and ejections_enforced_consecutive_5xx.
- The outlier detection ejections_success_rate stats counter has been deprecated in favour of ejections_detected_success_rate and ejections_enforced_success_rate.