jschoubben
b3486270d1
The mesh's own images declare theirs now, so the refusal ADR 0097 deferred is live. The builder's own image and the examples take arguments with defaults; make builds them, not the mesh.
36 lines
1.5 KiB
Docker
36 lines
1.5 KiB
Docker
ARG GO_BASE=golang:1.25-alpine
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# The control plane's image.
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#
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# novox/hq ADR 0006: this image is pinned by digest in the bundle the host carries, fetched on a
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# machine where no mesh exists yet, and run before there is anything to check it against. So it
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# holds the program and nothing else — no shell, no package manager, no libc, nothing with a CVE
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# feed of its own. What a person has to audit before trusting a first node is one binary.
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#
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# There are no CA certificates in here on purpose. Nothing it does today makes an outbound TLS
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# connection to a public name: it reaches PostgreSQL on the machine it was raised on, and the
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# broker is verified against a fingerprint pinned in a token rather than against a public root
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# (novox/hq ADR 0004). Adding them "just in case" would put a trust store in the one image whose
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# whole argument is that it contains nothing to reason about.
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FROM ${GO_BASE} AS build
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WORKDIR /src
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# Dependencies first, so a change to the source does not refetch them.
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COPY go.mod go.sum ./
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RUN go mod download
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COPY . .
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ARG VERSION=development
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RUN CGO_ENABLED=0 go build -trimpath \
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-ldflags "-s -w -X main.version=${VERSION}" \
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-o /mesh-controller ./cmd/mesh-controller
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FROM scratch
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COPY --from=build /mesh-controller /mesh-controller
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# Numeric because there is no /etc/passwd to look a name up in. Nothing here needs to be root:
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# it opens outbound connections and writes nothing to its own filesystem.
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USER 65534:65534
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ENTRYPOINT ["/mesh-controller"]
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