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chore: remove ARM support

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Building/testing for ARM does not happen often - the only runtime environment is Raspberry PI, which supports ARM64 - and complicates support for a ton of features. Aside from that, CI runs are much longer for ARM Dokku images, often reaching 15-20 minutes or just timing out completely.

Rather than support an architecture that doesn't have much usage by maintainers and has a lot of maintenance burden, we're removing the platform.
This commit is contained in:
Jose Diaz-Gonzalez
2023-08-27 12:00:34 -04:00
parent c23e878e7d
commit 76a979e139
12 changed files with 11 additions and 68 deletions
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2
docs/appendices/0.32.0-migration-guide.md
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@@ -19,3 +19,5 @@
- post-build-pack
## Removals
- ARM support has been removed. Users of ARM installations on platforms such as the Raspberry PI should consider migrating to ARM64. ARM64 will continue to be supported by Dokku, and there are no plans to remove support for ARM64.

2
docs/deployment/builders/herokuish-buildpacks.md
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@@ -181,7 +181,7 @@ dokku buildpacks:set-property --global stack
> [!IMPORTANT]
> New as of 0.29.0
By default, the builder-herokuish plugin is not enabled for non-amd64 platforms, and attempting to use it is blocked. This is because the majority of buildpacks are not cross-platform compatible, and thus building apps will either be considerably slower - due to emulating the amd64 platform - or won't work - due to building amd64 packages on arm/arm64 platforms.
By default, the builder-herokuish plugin is not enabled for non-amd64 platforms, and attempting to use it is blocked. This is because the majority of buildpacks are not cross-platform compatible, and thus building apps will either be considerably slower - due to emulating the amd64 platform - or won't work - due to building amd64 packages on arm64 platforms.
To force-enable herokuish on non-amd64 platforms, the `allowed` property can be set via `builder-herokuish:set`. The default value depends on the host platform architecture (`true` on amd64, `false` otherwise).

1
docs/getting-started/installation/index.md
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@@ -13,7 +13,6 @@ To start using Dokku, you'll need a system that meets the following minimum requ
- [Debian 10+ x64](https://www.debian.org/distrib/)
- A server with one of the following architectures
- AMD64 (alternatively known as `x86_64`), commonly used for Intel cloud servers
- ARMV7 (alternatively known as `armhf`), commonly used for Raspberry PI
- ARMV8 (alternatively known as `arm64`), commonly used for Raspberry PI and AWS Graviton
To avoid memory pressure during builds or runtime of your applications, we suggest the following: