From 3d77f06f1a0bdd5c5df15219f4690ad110ffdf0d Mon Sep 17 00:00:00 2001 From: Oliver Gould Date: Tue, 9 Jun 2020 09:23:44 -0700 Subject: [PATCH] Add release notes for stable-2.8.0 (#4577) --- CHANGES.md | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/CHANGES.md b/CHANGES.md index 151a1b349c7df..b7ada7bd93039 100644 --- a/CHANGES.md +++ b/CHANGES.md @@ -1,5 +1,54 @@ # Changes +## stable-2.8.0 + +This release introduces new a multi-cluster extension to Linkerd, allowing it +to establish connections across Kubernetes clusters that are secure, +transparent to the application, and work with any network topology. + +* The CLI has a new set of `linkerd multicluster` sub-commands that provide + tooling to create the resources needed to discover services across + Kubernetes clusters. +* The `linkerd multicluster gateways` command exposes gateway-specific + telemetry to supplement the existing `stat` and `tap` commands. +* The Linkerd-provided Grafana instance remains enabled by default, but it can + now be disabled. When it is disabled, the Linkerd dashboard can be + configured to link to an alternate, externally-managed Grafana instance. +* Jaeger & OpenCensus are configurable as an [add-on][addon-2.8.0]; and the + proxy has been improved to emit spans with labels that reflect its pod's + metadata. +* The `linkerd-cni` component has been promoted from _experimental_ to + _stable_. +* `linkerd profile --open-api` now honors the `x-linkerd-retryable` and + `x-linkerd-timeout` OpenAPI annotations. +* The Helm chart continues to become more flexible and modular, with new + Prometheus configuration options. More information is available in the + [Helm chart README][helm-2.8.0]. +* gRPC stream error handling has been improved so that transport errors + are indicated to the client with a `grpc-status: UNAVAILABLE` trailer. +* The proxy's memory footprint could grow significantly when + server-speaks-first-protocol connections hit the proxy. Now, a timeout is + in place to prevent these connections from consuming resources. +* After benchmarking the proxy in high-concurrency situations, the inbound + proxy has been improved to reduce contention, improving latency and + reducing spurious timeouts. +* The proxy could fail requests to services that had only 1 request every 60 + seconds. This race condition has been eliminated. +* Finally, users reported that ingress misconfigurations could cause the proxy + to consume an entire CPU which could lead to timeouts. The proxy now + attempts to prevent the most common traffic-loop scenarios to protect against + this. + +This release includes changes from a massive list of contributors. A special +thank-you to everyone who helped make this release possible: @aliariff, +@amariampolskiy, @arminbuerkle, @arthursens, @christianhuening, +@christyjacob4, @cypherfox, @daxmc99, @dr0pdb, @drholmie, @hydeenoble, +@joakimr-axis, @jpresky, @kohsheen1234, @lewiscowper, @lundbird, @matei207, +@mayankshah1607, @mmiller1, @naseemkullah, @sannimichaelse, & @supra08. + +[addon-2.8.0]: https://github.com/linkerd/linkerd2/blob/4219955bdb5441c5fce192328d3760da13fb7ba1/charts/linkerd2/README.md#add-ons-configuration +[helm-2.8.0]: https://github.com/linkerd/linkerd2/blob/4219955bdb5441c5fce192328d3760da13fb7ba1/charts/linkerd2/README.md + ## edge-20.6.2 This edge release is our second release candidate for `stable-2.8`, including