actions: allow creation of the arm64 container

Author: grampelberg

.github/workflows/build.yml

@@ -21,7 +21,7 @@ concurrency:
 
 jobs:
   binary:
-    runs-on: ${{ matrix.host_os }}
+    runs-on: ${{ matrix.runner }}
 
     strategy:
       matrix:
@@ -31,7 +31,7 @@ jobs:
 
         include:
           - arch: arm64
-            host_os: macos-latest
+            runner: macos-latest
 
     steps:
       - uses: actions/checkout@v4
@@ -68,7 +68,7 @@ jobs:
           retention-days: 1
 
   docker:
-    runs-on: ${{ matrix.host_os }}
+    runs-on: ${{ matrix.runner }}
 
     permissions:
       packages: write
@@ -79,11 +79,14 @@ jobs:
         arch:
           - amd64
           # The emulated arm64 builds are painfully slow (90m last time). Skip them until we have dedicated linux-arm64 hardware.
-          # - arm64
+          - arm64
 
         include:
           - arch: amd64
-            host_os: ubuntu-latest
+            runner: ubuntu-latest
+
+          - arch: arm64
+            runner: buildjet-4vcpu-ubuntu-2204-arm
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/release.yml

@@ -45,6 +45,9 @@ jobs:
           path: /tmp/digests
           pattern: digests-*
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: buildx
         uses: docker/setup-buildx-action@v3
 

justfile

@@ -45,10 +45,12 @@ extract-from-digests:
 
     for digest in /tmp/digests/*/*; do
         sha="$(basename "${digest}")"
-        name="kuberift-$(basename $(dirname "${digest}") | cut -d- -f2-)"
+        bucket="$(basename $(dirname "${digest}"))"
+        IFS=- read -r _ os arch <<< "${bucket}"
+        name="kuberift-${os}-${arch}"
         echo "Extracting {{ image }}@sha256:${sha}"
 
-        container_id="$(docker create {{ image }}@sha256:${sha})"
+        container_id="$(docker create --platform=${os}/${arch} {{ image }}@sha256:${sha})"
         docker cp "${container_id}:/usr/local/bin/kuberift" "/tmp/bins/${name}"
         docker rm "${container_id}"
     done