Docker compose fails on Raspberry Pi - docker-compose

Question

Running $ docker compose up -d on the following docker-compose.yml
version: '3'
services:
web:
platform: linux/arm/v6
build: ./web
restart: always
environment:
DATABASE_URL: ${DATABASE_URL}
SECRET_KEY: ${SECRET_KEY}
TZ: Europe/Amsterdam
ports:
- ${PORT}:5000
depends_on:
- db
volumes:
- web-data:/data
db:
platform: linux/arm/v6
image: arm32v6/postgres:15.1-alpine
restart: always
environment:
POSTGRES_USER: ${POSTGRES_USER}
POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
POSTGRES_DB: ${POSTGRES_DB}
ports:
- ${POSTGRES_PORT}:5432
volumes:
- postgres-data:/var/lib/postgresql/data
volumes:
postgres-data:
web-data:
should create two docker containers. However, it produces
[+] Building 6.5s (3/3) FINISHED
=> [internal] load build definition from Dockerfile 0.5s
=> => transferring dockerfile: 32B 0.2s
=> [internal] load .dockerignore 0.2s
=> => transferring context: 2B 0.1s
=> ERROR resolve image config for docker.io/docker/dockerfile:1 2.4s
------
> resolve image config for docker.io/docker/dockerfile:1:
------
failed to solve: rpc error: code = Unknown desc = failed to solve with frontend
dockerfile.v0: failed to solve with frontend gateway.v0: no match for platform in manifest
sha256:9ba7531bd80fb0a858632727cf7a112fbfd19b17e94c4e84ced81e24ef1a0dbc: not found
I verified that both services (web and db) in my docker-compose file can be build using docker build, which excludes any platform issues from the services.
What does no match for platform in manifest mean? More importantly, how can I fix the error?

Answer 1

A temporary solution is to replace docker-compose.yml with explicit docker commands.
# Create the network and volumes
docker network create randpion-app
docker volume create postgres-data
docker volume create web-data
# Build the web service
docker build -t randpion/web web
# Load the environment variables from the .env file
export $(cat .env | xargs)
# Start the database service
docker run -d \
--network randpion-app --network-alias db --name randpion-db \
--platform "linux/arm/v6" \
-v postgres-data:/var/lib/postgresql/data \
-e POSTGRES_USER=${POSTGRES_USER} \
-e POSTGRES_PASSWORD=${POSTGRES_PASSWORD} \
-e POSTGRES_DB=${POSTGRES_DB} \
-p ${POSTGRES_PORT}:5432 \
arm32v6/postgres:15.1-alpine
# Start the web service
docker run -d \
--network randpion-app --network-alias web --name randpion-web \
--platform "linux/arm/v6" \
-v web-data:/data \
-e DATABASE_URL=${DATABASE_URL} \
-e SECRET_KEY=${SECRET_KEY} \
-e TZ=Europe/Amsterdam \
-p ${PORT}:5000 \
randpion/web
This runs fine for now, but the solution is not ideal. For example, the containers must restart after every reboot.