2017年Envoy动态

Matt Klein在Lyft进行Envoy的开发

2017年，Envoy在平稳中逐渐走向成熟，xDS API逐渐成型

年度动态

Cluster discovery service (CDS) API.
Outlier detection (passive health checking).
Envoy configuration is now checked against a JSON schema.
Ring hash consistent load balancer, as well as HTTP consistent hash routing based on a policy.
Vastly enhanced global rate limit configuration via the HTTP rate limiting filter.
HTTP routing to a cluster retrieved from a header.
Weighted cluster HTTP routing.
Auto host rewrite during HTTP routing.
Regex header matching during HTTP routing.
HTTP access log runtime filter.
LightStep tracer parent/child span association.
Route discovery service (RDS) API.
HTTP router x-envoy-upstream-rq-timeout-alt-response header support.
use_original_dst and bind_to_port listener options (useful for iptables based transparent proxy support).
TCP proxy filter route table support.
Configurable stats flush interval.
Various third party library upgrades, including using BoringSSL as the default SSL provider.
No longer maintain closed HTTP/2 streams for priority calculations. Leads to substantial memory savings for large meshes.
Numerous small changes and fixes not listed here.

个人小结：

关键更新：CDS（Cluster discovery service）API 、RDS(Route discovery service) API、离群检测 (Outlier detection，被动健康检查).
重要更新：环形哈希一致性的负载均衡，以及基于策略的HTTP一致性哈希路由，HTTP 路由增强，TCP 路由增强，使用BoringSSL作为默认的SSL提供商

关键更新：增加 LDS API
重要更新：直接支持yaml作为配置文件、新增 Original destination cluster and load balancer 、新增 websocket 支持

关键更新：xds v2 API接近Production Ready，新增Lua filter
重要更新：直接支持yaml作为配置文件、新增 Original destination cluster and load balancer 、新增 websocket 支持，支持 subset load balancer，路由功能的各种优化和增强