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Dockerfile
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# https://backstage.io/docs/deployment/docker/#multi-stage-build
# Stage 1 - Create yarn install skeleton layer
FROM node:18-bookworm-slim AS packages
WORKDIR /app
COPY package.json yarn.lock ./
COPY packages packages
# Comment this out if you don't have any internal plugins
COPY plugins plugins
RUN find packages \! -name "package.json" -mindepth 2 -maxdepth 2 -exec rm -rf {} \+
# Stage 2 - Install dependencies and build packages
FROM node:18-bookworm-slim AS build
# Install isolate-vm dependencies, these are needed by the @backstage/plugin-scaffolder-backend.
RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && \
apt-get install -y --no-install-recommends python3 g++ build-essential && \
yarn config set python /usr/bin/python3
# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
# in which case you should also move better-sqlite3 to "devDependencies" in package.json.
RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && \
apt-get install -y --no-install-recommends libsqlite3-dev
USER node
WORKDIR /app
COPY --from=packages --chown=node:node /app .
RUN --mount=type=cache,target=/home/node/.cache/yarn,sharing=locked,uid=1000,gid=1000 \
yarn install --frozen-lockfile --network-timeout 600000
COPY --chown=node:node . .
RUN yarn tsc
RUN yarn --cwd packages/backend build
# If you have not yet migrated to package roles, use the following command instead:
# RUN yarn --cwd packages/backend backstage-cli backend:bundle --build-dependencies
RUN mkdir packages/backend/dist/skeleton packages/backend/dist/bundle \
&& tar xzf packages/backend/dist/skeleton.tar.gz -C packages/backend/dist/skeleton \
&& tar xzf packages/backend/dist/bundle.tar.gz -C packages/backend/dist/bundle
# Stage 3 - Build the actual backend image and install production dependencies
FROM node:18-bookworm-slim
# Install isolate-vm dependencies, these are needed by the @backstage/plugin-scaffolder-backend.
# Additionally, we install dependencies for `techdocs.generator.runIn: local`.
# https://backstage.io/docs/features/techdocs/getting-started#disabling-docker-in-docker-situation-optional
ENV VIRTUAL_ENV=/opt/venv
ENV PATH="$VIRTUAL_ENV/bin:$PATH"
RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && \
apt-get install -y --no-install-recommends python3 python3-pip python3-venv g++ build-essential && \
yarn config set python /usr/bin/python3 && \
python3 -m venv $VIRTUAL_ENV && \
pip3 install mkdocs-techdocs-core==1.2.3
# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
# in which case you should also move better-sqlite3 to "devDependencies" in package.json.
RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
--mount=type=cache,target=/var/lib/apt,sharing=locked \
apt-get update && \
apt-get install -y --no-install-recommends libsqlite3-dev
# From here on we use the least-privileged `node` user to run the backend.
USER node
# This should create the app dir as `node`.
# If it is instead created as `root` then the `tar` command below will fail: `can't create directory 'packages/': Permission denied`.
# If this occurs, then ensure BuildKit is enabled (`DOCKER_BUILDKIT=1`) so the app dir is correctly created as `node`.
WORKDIR /app
# Copy the install dependencies from the build stage and context
COPY --from=build --chown=node:node /app/yarn.lock /app/package.json /app/packages/backend/dist/skeleton/ ./
RUN --mount=type=cache,target=/home/node/.cache/yarn,sharing=locked,uid=1000,gid=1000 \
yarn install --frozen-lockfile --production --network-timeout 600000
# Copy the built packages from the build stage
COPY --from=build --chown=node:node /app/packages/backend/dist/bundle/ ./
# Copy any other files that we need at runtime
COPY --chown=node:node app-config.yaml app-config.production.yaml app-config.5min.yaml ./
COPY --chown=node:node catalog-info.yaml ./
COPY --chown=node:node templates templates
COPY --chown=node:node examples examples
# This switches many Node.js dependencies to production mode.
ENV NODE_ENV=production
CMD ["node", "packages/backend", "--config", "app-config.yaml"]