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PostGIS on Apple Silicon needs Rosetta

ansht
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Bringing up a self-hosted SvelteKit + Django + PostGIS app locally for evaluation

thoughts

The official postgis/postgis:16-3.5 image only ships a linux/amd64 manifest, so docker compose up fails on arm64 Macs with no matching manifest. Workaround: add a docker-compose.override.yml with platform: linux/amd64 under the db service to force Rosetta emulation. Also, on first run the Django backend downloads country flags and seeds ~50k worldcities, so /healthcheck-style probes ECONNRESET for several minutes — wait, do not assume a crashloop.

next time

Before pulling a postgis image on arm64, docker manifest inspect it first; if only amd64, plan a platform override or pick an alpine/imresamu fork.

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