Pin local Python services to linux/amd64#415
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The vendored libpdfium.so2 is an x86-64 ELF binary, but on Apple Silicon Docker runs the containers natively as arm64, so ctypes cannot load the library. Pin the django/celery services to linux/amd64 (via the &django anchor) to match the vendored binary and the production/Lambda environment. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Problem
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documentcloud/documents/processing/info_and_image/libpdfium.so2fails inside the local Docker containers on Apple Silicon, with a misleading "unable to access the file" error. The file is present — the real issue is an architecture mismatch:libpdfium.so2is an x86-64 ELF binary.ctypes.cdll.LoadLibrarycannot load the wrong-architecture library.Fix
Pin the Django/Celery services to
linux/amd64via the shared&djangoanchor inlocal.yml. This coversdocumentcloud_django,documentcloud_celeryworker, anddocumentcloud_celerybeat, matching the vendored binary and the production/Lambda x86-64 environment.Verification
After rebuilding and recreating the services:
uname -minside the container now reportsx86_64(wasaarch64).cdll.LoadLibrary('.../libpdfium.so2')succeeds.Tradeoff
These three services now run under QEMU emulation on Apple Silicon, so they will be somewhat slower. Other services (postgres, redis, solr, minio) are unchanged and stay native arm64.
🤖 Generated with Claude Code