1.14.0 (July 7, 2020)

Changes

• access log: access logger extensions use the “envoy.access_loggers” name space. A mapping of extension names is available in the deprecated documentation.

• access log: added support for %DOWNSTREAM_LOCAL_PORT% access log formatters.

• access log: fixed %DOWSTREAM_DIRECT_REMOTE_ADDRESS% when used with PROXY protocol listener filter.

• access log: introduced connection-level access loggers.

• adaptive concurrency: fixed bug that allowed concurrency limits to drop below the configured minimum.

• adaptive concurrency: minRTT is now triggered when the minimum concurrency is maintained for 5 consecutive sampling intervals.

• admin: added POST /reopen_logs endpoint to control log rotation.

• admin: added support for displaying ip address subject alternate names in certs end point.

• api: froze v2 xDS API. New feature development in the API should occur in v3 xDS. While the v2 xDS API has been deprecated since 1.13.0, it will continue to be supported by Envoy until EOY 2020. See Supported API versions.

• aws_lambda: added AWS Lambda filter that converts HTTP requests to Lambda invokes. This effectively makes Envoy act as an egress gateway to AWS Lambda.

• aws_request_signing: a few fixes so that it works with S3.

• config: added stat update_time.

• config: use type URL to select an extension whenever the config type URL (or its previous versions) uniquely identify a typed extension, see extension configuration.

• datasource: added retry policy for remote async data source.

• dns: added support for dns_failure_refresh_rate for the dns cache to set the DNS refresh rate during failures.

• dns: the STRICT_DNS cluster now only resolves to 0 hosts if DNS resolution successfully returns 0 hosts.

• eds: added hostname field for endpoints and hostname field for endpoint’s health check config. This enables auto host rewrite and customizing the host header during health checks for eds endpoints.

• ext_authz: disabled the use of lowercase string matcher for headers matching in HTTP-based ext_authz. Can be reverted temporarily by setting runtime feature envoy.reloadable_features.ext_authz_http_service_enable_case_sensitive_string_matcher to false.

• fault: added support for controlling abort faults with HTTP header fault configuration to the HTTP fault filter.

• grpc-json: added support for building HTTP request into google.api.HttpBody.

• grpc-stats: added option to limit which messages stats are created for.

• http: added headers_with_underscores_action setting to control how client requests with header names containing underscore characters are handled. The options are to allow such headers, reject request or drop headers. The default is to allow headers, preserving existing behavior.

• http: added max_stream_duration to specify the duration of existing streams. See connection and stream timeouts.

• http: added HTTP/1.1 flood protection. Can be temporarily disabled using the runtime feature envoy.reloadable_features.http1_flood_protection.

• http: connection header sanitizing has been modified to always sanitize if there is no upgrade, including when an h2c upgrade attempt has been removed.

• http: fixed a bug that could send extra METADATA frames and underflow memory when encoding METADATA frames on a connection that was dispatching data.

• http: fixing a bug in HTTP/1.0 responses where Connection: keep-alive was not appended for connections which were kept alive.

• http: http filter extensions use the “envoy.filters.http” name space. A mapping of extension names is available in the deprecated documentation.

• http: the runtime feature http.connection_manager.log_flood_exception is removed and replaced with a connection access log response code.

• http: upgrade parser library, which removes support for “identity” transfer-encoding value.

• listener filters: listener filter extensions use the “envoy.filters.listener” name space. A mapping of extension names is available in the deprecated documentation.

• listeners: added listener filter matcher api to disable individual listener filter on matching downstream connections.

• loadbalancing: added support for retry host predicates in conjunction with consistent hashing load balancers (ring hash and maglev).

• loadbalancing: added support for using hostname for consistent hash loadbalancing via consistent_hash_lb_config.

• lua: added a parameter to httpCall that makes it possible to have the call be asynchronous.

• lua: added moonjit support.

• mongo: the stat emitted for queries without a max time set in the MongoDB filter was modified to emit correctly for Mongo v3.2+.

• network filters: added a direct response filter.

• network filters: network filter extensions use the “envoy.filters.network” name space. A mapping of extension names is available in the deprecated documentation.

• rbac: added remote_ip and direct_remote_ip for matching downstream remote IP address.

• rbac: deprecated source_ip with direct_remote_ip and remote_ip.

• request_id_extension: added an ability to extend request ID handling at HTTP connection manager.

• retry: added a retry predicate that rejects hosts based on metadata..

• router: added auto_san_validation to support overrriding SAN validation to transport socket for new upstream connections based on the downstream HTTP host/authority header.

• router: added ability to set attempt count in downstream response, see virtual host’s include response attempt count config.

• router: added additional stats for virtual clusters.

• router: added support for regex_rewrite for path rewriting using regular expressions and capture groups.

• router: added support for %DOWNSTREAM_LOCAL_PORT% header formatter.

• router: added the ability to match a route based on whether a downstream TLS connection certificate has been validated.

• router: don’t ignore per_try_timeout when the global route timeout is disabled.

• router: strip whitespace for retry_on, grpc-retry-on header and retry-on header.

• runtime: enabling the runtime feature envoy.deprecated_features.allow_deprecated_extension_names disables the use of deprecated extension names.

• runtime: integer values may now be parsed as booleans.

• sds: added GenericSecret to support secret of generic type.

• sds: added certificate rotation support for certificates in static resources.

• server: the SIGUSR1 access log reopen warning now is logged at info level.

• stat sinks: stat sink extensions use the envoy.stat_sinks name space. A mapping of extension names is available in the deprecated documentation.

• thrift_proxy: added router filter stats to docs.

• tls: added configuration to disable stateless TLS session resumption disable_stateless_session_resumption.

• tracing: added gRPC service configuration to the OpenCensus Stackdriver and OpenCensus Agent tracers.

• tracing: tracer extensions use the “envoy.tracers” name space. A mapping of extension names is available in the deprecated documentation.

• upstream: added upstream_rq_retry_limit_exceeded to cluster, and virtual cluster stats.

• upstream: changed load distribution algorithm when all priorities enter panic mode.

• upstream: combined HTTP/1 and HTTP/2 connection pool code. This means that circuit breaker limits for both requests and connections apply to both pool types. Also, HTTP/2 now has the option to limit concurrent requests on a connection, and allow multiple draining connections. The old behavior is deprecated, but can be used during the deprecation period by disabling runtime feature envoy.reloadable_features.new_http1_connection_pool_behavior or envoy.reloadable_features.new_http2_connection_pool_behavior and then re-configure your clusters or restart Envoy. The behavior will not switch until the connection pools are recreated. The new circuit breaker behavior is described here.

• zlib: by default zlib is initialized to use its default strategy (Z_DEFAULT_STRATEGY) instead of the fixed one (Z_FIXED). The difference is that the use of dynamic Huffman codes is enabled now resulting in better compression ratio for normal data.

Deprecated

• circuit_breaker: The previous behavior for upstream connection pool circuit breaking described here has been deprecated in favor of the new behavior described here.

• compression: The content_length, content_type, disable_on_etag_header and remove_accept_encoding_header fields in HTTP Gzip filter config have been deprecated in favor of compressor.

• compression: The statistics counter header_gzip in HTTP Gzip filter has been deprecated in favor of header_compressor_used.

• grpc_stats: The grpc_stats filter behavior of by default creating a new stat for every message type seen is deprecated. The default will switch to only creating a fixed set of stats. The previous behavior can be enabled by enabling stats_for_all_methods, and the previous default can be enabled until the end of the deprecation period by enabling runtime feature envoy.deprecated_features.grpc_stats_filter_enable_stats_for_all_methods_by_default.

• logging: Access Logger, Listener Filter, HTTP Filter, Network Filter, Stats Sink, and Tracer names have been deprecated in favor of the extension name from the envoy build system. Disable the runtime feature envoy.deprecated_features.allow_deprecated_extension_names to disallow the deprecated names. Use of these extension names generates a log message and increments the deprecated_feature_use metric in stats.

  Canonical Names	Deprecated Names
  envoy.access_loggers.file	envoy.file_access_log
  envoy.access_loggers.http_grpc	envoy.http_grpc_access_log
  envoy.access_loggers.tcp_grpc	envoy.tcp_grpc_access_log
  envoy.filters.http.buffer	envoy.buffer
  envoy.filters.http.cors	envoy.cors
  envoy.filters.http.csrf	envoy.csrf
  envoy.filters.http.dynamo	envoy.http_dynamo_filter
  envoy.filters.http.ext_authz	envoy.ext_authz
  envoy.filters.http.fault	envoy.fault
  envoy.filters.http.grpc_http1_bridge	envoy.grpc_http1_bridge
  envoy.filters.http.grpc_json_transcoder	envoy.grpc_json_transcoder
  envoy.filters.http.grpc_web	envoy.grpc_web
  envoy.filters.http.gzip	envoy.gzip
  envoy.filters.http.health_check	envoy.health_check
  envoy.filters.http.ip_tagging	envoy.ip_tagging
  envoy.filters.http.lua	envoy.lua
  envoy.filters.http.ratelimit	envoy.rate_limit
  envoy.filters.http.router	envoy.router
  envoy.filters.http.squash	envoy.squash
  envoy.filters.listener.http_inspector	envoy.listener.http_inspector
  envoy.filters.listener.original_dst	envoy.listener.original_dst
  envoy.filters.listener.original_src	envoy.listener.original_src
  envoy.filters.listener.proxy_protocol	envoy.listener.proxy_protocol
  envoy.filters.listener.tls_inspector	envoy.listener.tls_inspector
  envoy.filters.network.client_ssl_auth	envoy.client_ssl_auth
  envoy.filters.network.echo	envoy.echo
  envoy.filters.network.ext_authz	envoy.ext_authz
  envoy.filters.network.http_connection_manager	envoy.http_connection_manager
  envoy.filters.network.mongo_proxy	envoy.mongo_proxy
  envoy.filters.network.ratelimit	envoy.ratelimit
  envoy.filters.network.redis_proxy	envoy.redis_proxy
  envoy.filters.network.tcp_proxy	envoy.tcp_proxy
  envoy.stat_sinks.dog_statsd	envoy.dog_statsd
  envoy.stat_sinks.metrics_service	envoy.metrics_service
  envoy.stat_sinks.statsd	envoy.statsd
  envoy.tracers.dynamic_ot	envoy.dynamic.ot
  envoy.tracers.lightstep	envoy.lightstep
  envoy.tracers.zipkin	envoy.zipkin

  Note

  Some renamed filters produce metadata using their filter name as the metadata namespace:

  • Mongo Proxy Filter

  • Zookeeper Filter

  The metadata generated by these filters may be consumed by the following extensions, whose configurations may need to be adjusted to use the new names.

  • Access Loggers

  • HTTP and Network Ext Authz filters

  • HTTP and Network RBAC filters

  • Tracers

• matching: The previous behavior of auto ignoring case in headers matching: allowed_headers, allowed_upstream_headers, and allowed_client_headers of HTTP-based ext_authz has been deprecated in favor of explicitly setting the ignore_case field.

• rbac: The source_ip field in RBAC has been deprecated in favor of direct_remote_ip and remote_ip.

• route_checker_tool: The header_fields, custom_header_fields, and additional_headers fields for the route checker tool have been deprecated in favor of request_header_fields, response_header_fields, additional_request_headers, and additional_response_headers.

• streaming: Support for the undocumented HTTP/1.1 :no-chunks pseudo-header has been removed. If an extension was using this it can achieve the same behavior via the new http1StreamEncoderOptions() API.