Edge Roundup for May (even though it's June now, we're covering the M…

…ay releases)

Signed-off-by: Flynn <flynn@buoyant.io>

linkerd.io/content/blog/2024/0606-edge-release-roundup.md

@@ -0,0 +1,150 @@
+---
+author: 'flynn'
+date: 2024-06-06T00:00:00Z
+title: |-
+  Linkerd Edge Release Roundup: May 2024
+url:
+  /2024/06/06/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="May 2024 Linkerd Edge Release Roundup"
+  src="/uploads/2023/06/roundup-clocks-rect.png" >}}
+
+Welcome to the May 2024 Edge Release Roundup post, where we dive into the most
+recent edge releases to help keep everyone up to date on the latest and
+greatest! This month, we're covering the May 2024 releases from `edge-24.5.5`
+back to `edge-24.5.1` -- there's a lot here so we'll get right into it.
+
+## How to give feedback
+
+Remember, edge releases are a snapshot of our current development work on
+`main`; by definition, they always have the most recent features but they may
+have incomplete features, features that end up getting rolled back later, or
+(gasp!) even bugs. If you're running edge releases, it's _very_ important that
+you send us feedback on how things are going for you!
+
+We would be delighted to hear how these releases work out for you! You can
+open [a GitHub issue](https://github.com/linkerd/linkerd2/issues/) or
+[discussion](https://github.com/linkerd/linkerd2/discussions/), join us on
+[Slack](https://slack.linkerd.io), or visit the [Buoyant Linkerd
+Forum](https://linkerd.buoyant.io) -- all are great ways to reach us.
+
+## 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 [knowmost], [Marwan
+Ahmed], and [Nico Feulner] for their contributions! You'll find more
+information about all of these contributions in the release-by-release details
+below.
+
+[knowmost]: https://github.com/knowmost
+[Marwan Ahmed]: https://github.com/marwanad
+[Nico Feulner]: https://github.com/nico151999
+
+## Recommendations and breaking changes
+
+We recommend `edge-24.5.5` instead of `edge-24.5.4` because `edge-24.5.4`
+switches IPv6 to off by default for the control plane, but mistakenly left it
+defaulted to on for the Linkerd CNI plugin.
+
+In `edge-24.5.1`, the `patchs` metric introduced in `edge-24.3.4` is renamed to `patches`.
+
+Finally, starting in `edge-24.5.2`, Linkerd will install the
+`grpcroute.gateway.networking.k8s.io` CRD, in preparation for later GRPCRoute
+support. (You can disable this by setting `enableHttpRoutes` to `false` when
+installing, which will also prevent Linkerd from installing the
+`httproute.gateway.networking.k8s.io` CRD.)
+
+## The releases
+
+This group of releases has focused on IPv6 support - delivered in
+`edge-24.5.2`! - and finalizing fixes for some edge cases in the way Linkerd
+handles EndpointSlices and HTTPRoutes. Of course, each edge release has _many_
+dependency updates; we won't list them all here, but you can find them in the
+release notes for each release.
+
+### [`edge-24.5.5`](https://github.com/linkerd/linkerd2/releases/tag/edge-24.5.5) (May 31, 2024)
+
+This release makes `linkerd-cni` default to _not_ supporting IPv6, to match
+the rest of the control plane. Set `disableIPv6` to `false` to enable IPv6 in
+the CNI.
+
+### [`edge-24.5.4`](https://github.com/linkerd/linkerd2/releases/tag/edge-24.5.4) (May 23, 2024)
+
+_We recommend [`edge-24.5.5`] instead of this release since this release mistakenly leaves IPv6 defaulted to on for the CNI plugin._
+
+This release adds support for JSON output to the `linkerd inject`, `linkerd
+uninject` and `linkerd profile` commands, and a `--token` flag to `linkerd
+diagnostics policy` that allows specifying the context token to use so that
+you can see how specific clients will see policies. It also adds support for
+setting the group ID for the control plane (thanks, [Nico Feulner]!), switches
+IPv6 to off by default for the control plane, adds support for several proxy
+settings to the `linkerd-control-plane` chart, allows overriding how many
+cores control-plane components can use, correctly supports Gateway API
+producer routes, fixes a race conditions around EndpointSlice updates, and
+fixes intermittent routing failures with HTTPRoute ([issue 12610]).
+
+[`edge-24.5.5`]: https://github.com/linkerd/linkerd2/releases/tag/edge-24.5.5
+[Nico Feulner]: https://github.com/nico151999
+[issue 12610]: https://github.com/linkerd/linkerd2/issues/12610
+
+### [`edge-24.5.3`](https://github.com/linkerd/linkerd2/releases/tag/edge-24.5.3) (May 15, 2024)
+
+`edge-24.5.3` removes an internal limit on the number of concurrent gRPC streams to the control plane, leaving available memory as the only constraint.
+
+### [`edge-24.5.2`](https://github.com/linkerd/linkerd2/releases/tag/edge-24.5.2) (May 13, 2024)
+
+`edge-24.5.2` adds support for IPv6 (set `disableIPv6` to `false` when
+installing the control plane to use it). It also correctly sets the
+`backend_not_found` status on HTTPRoutes with no backends. Finally, it adds
+the Gateway API GRPCRoute resource as part of continued work on support for
+GRPCRoutes, although this edge release doesn't attach any functionality to the
+CRD.
+
+To prevent Linkerd from installing the GRPCRoute and HTTPRoute resources from Gateway API, set `enableHttpRoutes` to `false` when installing.
+
+### [`edge-24.5.1`](https://github.com/linkerd/linkerd2/releases/tag/edge-24.5.1) (May 2, 2024)
+
+_This release has one breaking change: the `patchs` metric introduced in [edge-24.3.4] is now correctly named `patches`._
+
+`edge-24.5.1` adds configurable HTTP/2 server keepalives, fixes CLI issues and opaque-port issues when using native sidecars ([issue #12395]), restores Server v1beta1 to ease migrations after it was mistakenly removed in [edge-24.1.2], fixes an issue that could cause the endpoints gauge to report incorrect numbers of endpoints, and continues ongoing work on upcoming IPv6 support.
+
+Additionally, it avoids unnecessary cleanup of headless endpoint mirrors during garbage collection (thanks, [Marwan Ahmed]!) and cleans up some documentation in the code (thanks, [knowmost]!).
+
+[issue #12395]: https://github.com/linkerd/linkerd2/issues/12395
+[edge-24.3.4]: https://github.com/linkerd/linkerd2/releases/tag/edge-24.3.4
+[edge-24.1.2]: https://github.com/linkerd/linkerd2/releases/tag/edge-24.1.2
+[Marwan Ahmed]: https://github.com/marwanad
+[knowmost]: https://github.com/knowmost
+
+## Installing the latest edge release
+
+Installing the latest edge release needs just a single command.
+
+```bash
+curl --proto '=https' --tlsv1.2 -sSfL https://run.linkerd.io/install-edge | sh
+```
+
+You can also [install edge releases with Helm](https://linkerd.io/2.15/tasks/install-helm/).
+
+## Linkerd is for everyone
+
+Linkerd is a graduated project of the [Cloud Native Computing
+Foundation](https://cncf.io/). Linkerd is [committed to open
+governance.](/2019/10/03/linkerds-commitment-to-open-governance/) If you have
+feature requests, questions, or comments, we'd love to have you join our
+rapidly-growing community! Linkerd is hosted on
+[GitHub](https://github.com/linkerd/), and we have a thriving community on
+[Slack](https://slack.linkerd.io/), [Twitter](https://twitter.com/linkerd), and
+in [mailing lists](/community/get-involved/). Come and join the fun!
+
+----
+
+_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)._