49 lines
1.8 KiB
Docker
49 lines
1.8 KiB
Docker
# All builds should be done using the platform native to the build node to allow
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# cache sharing of the go mod download step.
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# Go cross compilation is also faster than emulation the go compilation across
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# multiple platforms.
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FROM --platform=${BUILDPLATFORM} golang:1.17-buster AS builder
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# Copy sources
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WORKDIR $GOPATH/src/github.com/oauth2-proxy/oauth2-proxy
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# Fetch dependencies
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COPY go.mod go.sum ./
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RUN go mod download
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# Now pull in our code
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COPY . .
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# Arguments go here so that the previous steps can be cached if no external
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# sources have changed.
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ARG VERSION
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ARG TARGETPLATFORM
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ARG BUILDPLATFORM
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# Build binary and make sure there is at least an empty key file.
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# This is useful for GCP App Engine custom runtime builds, because
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# you cannot use multiline variables in their app.yaml, so you have to
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# build the key into the container and then tell it where it is
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# by setting OAUTH2_PROXY_JWT_KEY_FILE=/etc/ssl/private/jwt_signing_key.pem
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# in app.yaml instead.
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# Set the cross compilation arguments based on the TARGETPLATFORM which is
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# automatically set by the docker engine.
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RUN case ${TARGETPLATFORM} in \
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"linux/amd64") GOARCH=amd64 ;; \
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"linux/arm64") GOARCH=arm64 ;; \
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"linux/arm/v6") GOARCH=arm GOARM=6 ;; \
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esac && \
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printf "Building OAuth2 Proxy for arch ${GOARCH}\n" && \
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GOARCH=${GOARCH} VERSION=${VERSION} make build && touch jwt_signing_key.pem
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# Copy binary to alpine
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FROM alpine:3.15
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COPY nsswitch.conf /etc/nsswitch.conf
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
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COPY --from=builder /go/src/github.com/oauth2-proxy/oauth2-proxy/oauth2-proxy /bin/oauth2-proxy
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COPY --from=builder /go/src/github.com/oauth2-proxy/oauth2-proxy/jwt_signing_key.pem /etc/ssl/private/jwt_signing_key.pem
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USER 2000:2000
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ENTRYPOINT ["/bin/oauth2-proxy"]
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