Add cron service to run load_from_static 4x daily

.github/workflows/docker-build-push-cron.yml

@@ -0,0 +1,55 @@
+name: Build and Push Cron Docker Image
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "src/**"
+      - ".github/workflows/docker-build-push-cron.yml"
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: Life-USTC/server-cron
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha,format=short
+            type=ref,event=branch
+            latest
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./src
+          file: ./src/Dockerfile.cron
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

docker-compose.prod.yml

@@ -33,6 +33,23 @@ services:
         networks:
             - backend
 
+    cron:
+        image: ghcr.io/life-ustc/server-cron:latest
+        restart: always
+        depends_on:
+            - db
+        environment:
+            - DJANGO_SECRET_KEY=${DJANGO_SECRET_KEY}
+            - DJANGO_DEBUG=False
+            - DJANGO_ALLOWED_HOSTS=life-ustc.tiankaima.dev
+            - POSTGRES_DB=${POSTGRES_DB:-postgres}
+            - POSTGRES_USER=${POSTGRES_USER:-user}
+            - POSTGRES_PASSWORD=${POSTGRES_password}
+            - POSTGRES_HOST=${POSTGRES_HOST:-db}
+            - POSTGRES_PORT=${POSTGRES_PORT:-5432}
+        networks:
+            - backend
+
 networks:
     backend:
         driver: bridge

docker-compose.yml

@@ -36,6 +36,25 @@ services:
         networks:
             - backend
 
+    cron:
+        build:
+            context: ./src
+            dockerfile: Dockerfile.cron
+        volumes:
+            - ./src:/app
+        depends_on:
+            - db
+        environment:
+            - DJANGO_DEBUG=True
+            - DJANGO_ALLOWED_HOSTS=localhost,127.0.0.1,0.0.0.0
+            - POSTGRES_DB=${POSTGRES_DB:-postgres}
+            - POSTGRES_USER=${POSTGRES_USER:-user}
+            - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}
+            - POSTGRES_HOST=${POSTGRES_HOST:-db}
+            - POSTGRES_PORT=${POSTGRES_PORT:-5432}
+        networks:
+            - backend
+
 networks:
     backend:
         driver: bridge

src/Dockerfile.cron

@@ -0,0 +1,27 @@
+FROM python:3.13-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+COPY . .
+
+# Install cron, gettext, and git (needed for load_from_static to clone repos)
+RUN apt-get update && apt-get install -y cron gettext git && rm -rf /var/lib/apt/lists/* \
+    && pip install --upgrade pip \
+    && pip install --no-cache-dir -r requirements.txt
+
+RUN python manage.py compilemessages
+
+# Copy crontab file and set up cron
+COPY crontab /etc/cron.d/django-cron
+RUN chmod 0644 /etc/cron.d/django-cron \
+    && crontab /etc/cron.d/django-cron \
+    && touch /var/log/cron.log
+
+# Create entrypoint script
+RUN echo '#!/bin/bash\nset -e\nprintenv | grep -v "no_proxy" >> /etc/environment\ncron && tail -f /var/log/cron.log' > /entrypoint.sh \
+    && chmod +x /entrypoint.sh
+
+CMD ["/entrypoint.sh"]

src/crontab

@@ -0,0 +1,4 @@
+# Run load_from_static command 4 times per day (every 6 hours)
+# At 00:00, 06:00, 12:00, and 18:00 every day
+0 0,6,12,18 * * * cd /app && python manage.py load_from_static >> /var/log/cron.log 2>&1
+