20230807 Edge Release Roundup

linkerd.io/content/blog/2023/0807-edge-release-roundup.md

@@ -0,0 +1,188 @@
+---
+author: 'alejandro'
+date: 2023-08-07T00:00:00Z
+title: |-
+  Linkerd Edge Release Roundup: August 2023
+url:
+  /2023/08/07/linkerd-edge-release-roundup/
+thumbnail: '/uploads/2023/06/roundup-clocks-square.png'
+featuredImage: '/uploads/2023/06/roundup-clocks-rect.png'
+tags: [Linkerd, linkerd, edge, release, roundup]
+featured: false
+---
+
+{{< fig
+  alt="August Linkerd Edge Release Roundup"
+  src="/uploads/2023/06/roundup-clocks-rect.png" >}}
+
+Linkerd’s edge releases are a big part of our development process, and there
+have been a lot of them - five! - since our last edge-release roundup. The
+plan is do these roundups more frequently to keep things manageable, but for
+this one, we'll hit some highlights and then do a release-by-release list at
+the end.
+
+## Community Contributions
+
+We couldn't do what we do without the Linkerd community, and this batch of
+releases is definitely no exception. Huge thanks to [@hiteshwani29], [Abhijeet
+Gaurav], [Grégoire Bellon-Gervais], [Harsh Soni], [Jean-Charles Legras], and
+[Miguel Elias dos Santos] for their contributions across a wide range of
+areas, from the Linkerd CLI to host networking! You'll find more information
+about all of these contributions in the release-by-release details below.
+
+[@hiteshwani29]:https://github.com/hiteshwani29
+[Abhijeet Gaurav]:https://github.com/abhijeetgauravm
+[Grégoire Bellon-Gervais]:https://github.com/albundy83
+[Harsh Soni]:https://github.com/harsh020
+[Jean-Charles Legras]:https://github.com/jclegras
+[Miguel Elias dos Santos]:https://github.com/migueleliasweb
+
+## Gateway API
+
+From the feature perspective, our main focus over the last several edge
+releases has been improving our Gateway API support, bringing us closer to
+feature parity between [HTTPRoutes] and [ServiceProfiles]:
+
+- We added support for the Gateway API's `gateway.networking.k8s.io` APIGroup
+  to Linkerd in edge-23.7.1 on July 7th. This is a major step toward
+  conformance with the Gateway API's [Mesh profile]. (We're not turning off
+  support for `policy.linkerd.io` though, that's still quite a ways away.)
+
+- We added support for HTTPRoutes defined in the namespace from which a route
+  is called in edge-23.7.3 on July 28th. The Gateway API calls these
+  [_consumer routes_][consumer-routes] since the use case is, usually, doing
+  things like overriding the timeout for a workload you're calling. You can
+  learn more about this in the [Gateway API Mesh routing
+  documentation][gamma-routing].
+
+- We also made HTTPRoute `parentRefs` port numbers optional in edge-23.7.3,
+  per the [HTTPRoute standard].
+
+- Finally, we started adding support for [HTTPRoute filters]:
+  `RequestHeaderModifier` and `RequestRedirect` are supported in edge-23.7.2,
+  and `ResponseHeaderModifier` is supported in edge-23.7.3 (so edge-23.7.2
+  added header modifications for _requests_, and edge-23.7.3 added header
+  modifications for _responses_).
+
+[HTTPRoutes]:https://gateway-api.sigs.k8s.io/api-types/httproute/
+[HTTPRoute standard]:https://gateway-api.sigs.k8s.io/references/spec/#gateway.networking.k8s.io/v1alpha2.HTTPRoute
+[ServiceProfiles]:https://linkerd.io/2.13/features/service-profiles/
+[consumer-routes]:https://gateway-api.sigs.k8s.io/concepts/glossary/#consumer-route
+[gamma-routing]:https://gateway-api.sigs.k8s.io/concepts/gamma/#how-the-gateway-api-works-for-service-mesh
+[Mesh profile]:https://gateway-api.sigs.k8s.io/geps/gep-1686/
+[HTTPRoute filters]:https://gateway-api.sigs.k8s.io/references/spec/#gateway.networking.k8s.io/v1beta1.HTTPRouteFilter
+
+## Fixes
+
+Of the many fixes in these five releases, two in particular stand out:
+
+1. In edge-23.7.3, we fixed a race condition where the Linkerd destination
+   controller could panic in an environment with high churn of Endpoints or
+   Servers. The most common effect here is seeing restarts of the destination
+   controller Pods, but it could also result in traffic being sent to the
+   wrong destination endpoints.
+
+   This is covered in Linkerd issue [#11163].
+
+2. In edge-23.8.1, we raised the default capacities of the HTTP request queues
+   (both inbound and outbound) back to 10,000 after lowering them for Linkerd
+   2.13. The effect here is that in situations where a single destination
+   workload needed to accept a lot of concurrent traffic, the Linkerd proxies
+   would decide that they had too much load, and start shedding it by dropping
+   connections. This happened much more agressively in Linkerd 2.13 than in
+   Linkerd 2.12; it's fixed in edge-23.8.1.
+
+   This is covered in Linkerd issue [#11055] and PR [#11198].
+
+[#11163]:https://github.com/linkerd/linkerd2/issues/11163
+[#11055]:https://github.com/linkerd/linkerd2/issues/11055
+[#11198]:https://github.com/linkerd/linkerd2/pull/11198
+
+## Installing the Latest Edge Release
+
+```bash
+curl --proto '=https' --tlsv1.2 -sSfL https://run.linkerd.io/install-edge | sh
+```
+
+## How to give feedback
+
+We would be delighted to hear how these releases work out for you! The full
+changelogs are at
+<https://github.com/linkerd/linkerd2/releases/tag/edge-23.6.3>,
+<https://github.com/linkerd/linkerd2/releases/tag/edge-23.7.1>,
+<https://github.com/linkerd/linkerd2/releases/tag/edge-23.7.2>,
+<https://github.com/linkerd/linkerd2/releases/tag/edge-23.7.3>, and
+<https://github.com/linkerd/linkerd2/releases/tag/edge-23.8.1>. We’d love to
+hear your feedback on [Slack](https://slack.linkerd.io) or at the new [Buoyant
+Linkerd Forum](https://linkerd.buoyant.io). Looking forward to hearing from
+you – happy meshing!!
+
+## Release Details
+
+- edge-23.6.3, on June 30th, was all about a couple of community contributions:
+
+  - [@hiteshwani29] added JSONpath output to `linkerd viz tap`.
+
+  - [Jean-Charles Legras] fixed a proxy startup failure that could happen with
+    the `config.linkerd.io/admin-port` annotation.
+
+- edge-23.7.1, on July 7th, started our Gateway API theme and also made a
+  couple of fixes:
+
+  - We added support for the Gateway API's `gateway.networking.k8s.io`
+    APIGroup to Linkerd (a major step toward conformance with the Gateway
+    API's [Mesh profile]).
+
+  - We fixed a problem where the ingress-mode proxy wouldn't always correctly
+    use ServiceProfiles for destinations with no HTTPRoutes.
+
+  - We added distinguishable version information to the proxy's logs and metrics.
+
+- edge-23.7.2, on July 13th, continued the Gateway API theme and pulled in a
+  community fix:
+
+  - We added support for HTTPRoute's `RequestHeaderModifier` and
+    `RequestRedirect` [filters].
+
+  - [Miguel Elias dos Santos] fixed a `linkerd-cni` chart problem that could
+    block the CNI pods from coming up when the injector was broken.
+
+- edge-23.7.3, on July 28th, was our largest edge release: it had a lot of
+  Gateway API work and several fixes.
+
+  - We made HTTPRoute `parentRefs` port numbers optional, per the [HTTPRoute
+    standard].
+
+  - We added support for Gateway API [_consumer routes_][consumer-routes].
+
+  - We added support for HTTPRoute's `ResponseHeaderModifier`
+    [filter][HTTPRoute filters].
+
+  - [Grégoire Bellon-Gervais] fixed a Grafana error caused by an incorrect
+    datasource.
+
+  - [Harsh Soni] fixed the linkerd extension CLI commands so that they prefer
+    the `--register` flag over the `LINKERD_DOCKER_REGISTRY` environment
+    variable, for consistency.
+
+  - We fixed a race condition that could cause the destination controller to
+    panic.
+
+  - We added high-availability mode for the multicluster service mirror, and
+    further improved control-plane logging.
+
+  - We added support for disabling the network validator security context if
+    you're in an environment that defines its own security context.
+
+- Last but not least: edge-23.8.1, on August 3rd, brought in a couple of
+  very important bugfixes:
+
+  - [Abhijeet Gaurav] made it possible to use the `linkerd-cni` DaemonSet
+    without needing host networking support.
+
+  - We raised the default capacities of the HTTP request queues back to
+    10,000.
+
+----
+
+_Linkerd generally does new edge releases weekly; watch this space to keep up-to-date. Feedback on this blog series is welcome! Just ping `@flynn` on the [Linkerd Slack](https://slack.linkerd.io)._

linkerd.io/content/blog/_index.md

@@ -7,8 +7,8 @@ tags:
   - Tutorials & How-To's
   - Video
 items:
-  - blog/2023/0725-linkerd-hero.md
   - blog/2023/0720-flat-networks.md
+  - blog/2023/0713-linkerd-in-production.md
 description: Read the latest blog posts covering the Linkerd service mesh, from technical tutorials to announcements to what’s next on the roadmap.
 keywords: []
 ---