mirror of
https://github.com/livekit/livekit.git
synced 2026-10-29 03:22:28 +00:00
Elliot Morales Solé
a55d4c6c0f
The build already cross-compiles explicitly (CGO_ENABLED=0, GOOS=linux, GOARCH=$TARGETARCH), so the toolchain never needs to match the target arch. Without --platform=$BUILDPLATFORM a cross-arch build runs the entire Go compilation under QEMU emulation for a byte-identical binary: building linux/amd64 on an arm64 host went from minutes to still-running after ten. Only the final stage stays on $TARGETPLATFORM, where it belongs. go-version.sh reads the Go version out of the builder's FROM line, so its pattern now accepts an optional --platform flag before the image.
68 lines
3.0 KiB
Docker
68 lines
3.0 KiB
Docker
# Copyright 2023 LiveKit, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Pinned by digest so the build is reproducible even if the tag is republished.
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# The tag is kept alongside it for readability; Renovate updates both together.
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# This image is also the single source of truth for the Go toolchain: CI reads the
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# version out of this line (see .github/scripts/go-version.sh) so tests and images
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# always run the same runtime.
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# --platform=$BUILDPLATFORM pins the BUILDER to the host's own architecture. The
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# build below already cross-compiles explicitly (CGO_ENABLED=0, GOOS=linux,
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# GOARCH=$TARGETARCH), so the toolchain never needs to be the target's arch —
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# and without this line a cross-arch build runs the whole Go compilation under
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# QEMU emulation, which is roughly an order of magnitude slower for an identical
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# binary. Only the final stage stays on $TARGETPLATFORM, where it belongs.
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FROM --platform=$BUILDPLATFORM golang:1.27.3-alpine3.24@sha256:f2c872bcee949b7be9c490efd02b48a8a2fbf947cdf533f1c58525ec9d8170fd AS builder
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ARG TARGETPLATFORM
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ARG TARGETARCH
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RUN echo building for "$TARGETPLATFORM"
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WORKDIR /workspace
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# Build with exactly the toolchain in this image; fail (don't silently download)
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# if go.mod ever requires a newer version, so the pinned image stays authoritative.
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ENV GOTOOLCHAIN=local
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# Copy the Go Modules manifests
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COPY go.mod go.mod
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COPY go.sum go.sum
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# cache deps before building and copying source so that we don't need to re-download as much
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# and so that source changes don't invalidate our downloaded layer
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RUN go mod download
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# Copy the go source
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COPY cmd/ cmd/
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COPY pkg/ pkg/
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COPY test/ test/
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COPY version/ version/
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RUN CGO_ENABLED=0 GOOS=linux GOARCH=$TARGETARCH GO111MODULE=on go build -a -o livekit-server ./cmd/server
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FROM alpine:3.24.3@sha256:c6b073f8e9e58d881f6ffba6ebf3b9ebd60b9e7d6e8337018c0e68bb5c356873
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# Pull the latest security patches for base packages within the pinned Alpine
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# release. The digest above is only refreshed by a Renovate PR, so without this
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# an image can ship base-package CVEs that Alpine has already fixed.
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# NOTE: this relies on the build starting with a cold layer cache, which is true
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# today because the release workflow configures no buildx cache. If cache-from/
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# cache-to is ever added, this layer needs a cache-busting ARG (as ../cloud does
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# with SECURITY_REFRESH) or it will be served stale.
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RUN apk upgrade --no-cache
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COPY --from=builder /workspace/livekit-server /livekit-server
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# Run the binary.
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ENTRYPOINT ["/livekit-server"]
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