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The Dockerfile's last stage is now the image of "Deployment" in SPEC.md: Ubuntu 26.04 with ca-certificates, nix-bin and runit from a dated snapshot whose InRelease files are checked by hash, nixpkgs from its release file checked by SHA-256, runsvinit built at a fixed commit, and smallwebwaf as a runit service. smallwebwaf answers /_smallwebwaf/healthz, and `smallwebwaf healthcheck`, which takes no further argument, is the image's HEALTHCHECK. script/example-app builds an app on the image and checks it end to end. The Nix profile comes last on the PATH: first, busybox from nixpkgs replaced runit's own runsvdir and sv. SPEC.md is corrected to match what was built. Model: opus-5-5
21 lines
830 B
Docker
21 lines
830 B
Docker
# An app built on the smallwebwaf image, as under "Deployment" in
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# SPEC.md, which script/example-app builds and checks. The app is
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# busybox's web server, from the nixpkgs in the image, serving one page;
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# a real app copies in its own binary instead.
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#
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# A real app names the smallwebwaf image by digest. This one takes the
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# image script/example-app has just built, or else the one `make docker`
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# builds.
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ARG SMALLWEBWAF_IMAGE=smallwebwaf
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FROM ${SMALLWEBWAF_IMAGE}
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# Packages the app needs, from the nixpkgs in the image.
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RUN nix-env -iA nixpkgs.busybox
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# The app's page, and a user of its own to run it.
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RUN mkdir /var/www && echo 'hello from the example app' > /var/www/index.html
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RUN useradd --system --no-create-home --shell /usr/sbin/nologin app
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# The app's runit service.
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COPY --chmod=755 app.run /etc/service/app/run
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