dex/Dockerfile at master · edgeflare/dex · GitHub

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ARG BASE_IMAGE=alpine

FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.9.0@sha256:c64defb9ed5a91eacb37f96ccc3d4cd72521c4bd18d5442905b95e2226b0e707 AS xx

FROM --platform=$BUILDPLATFORM golang:1.27.1-alpine3.24@sha256:8a5910f31396cd4d89662f56c68b3ae31d374308270a1c3bd96672ee5ed43414 AS builder

COPY --from=xx / /

RUN apk add --update alpine-sdk ca-certificates openssl clang lld

ARG TARGETPLATFORM

RUN xx-apk --update add musl-dev gcc

# lld has issues building static binaries for ppc so prefer ld for it
RUN [ "$(xx-info arch)" != "ppc64le" ] || XX_CC_PREFER_LINKER=ld xx-clang --setup-target-triple

RUN xx-go --wrap

WORKDIR /usr/local/src/dex

ARG GOPROXY

ENV CGO_ENABLED=1

COPY go.mod go.sum ./
COPY api/v2/go.mod api/v2/go.sum ./api/v2/
RUN go mod download

COPY . .

# Propagate Dex version from build args to the build environment
ARG VERSION
RUN make release-binary

RUN xx-verify /go/bin/dex && xx-verify /go/bin/docker-entrypoint

FROM alpine:3.24.2@sha256:294b683cb724975bec92580e1e685676bd4b50bda910ddb8c51d4cabeaec77e6 AS stager

RUN mkdir -p /var/dex
RUN mkdir -p /etc/dex
COPY config.docker.yaml /etc/dex/

FROM ghcr.io/hairyhenderson/gomplate:v5.2.0@sha256:991ce1b8a1307fa32f9b8050a7b339697464664236cfddb1c4079df4aa5f1cd4 AS gomplate

# For Dependabot to detect base image versions
FROM alpine:3.24.2@sha256:294b683cb724975bec92580e1e685676bd4b50bda910ddb8c51d4cabeaec77e6 AS alpine

FROM alpine AS user-setup
RUN addgroup -g 1001 -S dex && adduser -u 1001 -S -G dex -D -H -s /sbin/nologin dex

FROM gcr.io/distroless/static-debian13:nonroot@sha256:e2e927ec666bae08560abb3c55d0659eceabb657f56b6782ab500a9fc7f555e3 AS distroless

FROM $BASE_IMAGE

# Dex connectors, such as GitHub and Google logins require root certificates.
# Proper installations should manage those certificates, but it's a bad user
# experience when this doesn't work out of the box.
#
# See https://go.dev/src/crypto/x509/root_linux.go for Go root CA bundle locations.
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt

# Ensure the dex user/group exist before setting ownership or switching to them.
COPY --from=user-setup /etc/passwd /etc/passwd
COPY --from=user-setup /etc/group /etc/group

COPY --from=stager --chown=1001:1001 /var/dex /var/dex
COPY --from=stager --chown=1001:1001 /etc/dex /etc/dex

# Copy module files for CVE scanning / dependency analysis.
COPY --from=builder /usr/local/src/dex/go.mod /usr/local/src/dex/go.sum /usr/local/src/dex/
COPY --from=builder /usr/local/src/dex/api/v2/go.mod /usr/local/src/dex/api/v2/go.sum /usr/local/src/dex/api/v2/

COPY --from=builder /go/bin/dex /usr/local/bin/dex
COPY --from=builder /go/bin/docker-entrypoint /usr/local/bin/docker-entrypoint
COPY --from=builder /usr/local/src/dex/web /srv/dex/web

COPY --from=gomplate /gomplate /usr/local/bin/gomplate

USER dex:dex

ENTRYPOINT ["/usr/local/bin/docker-entrypoint"]
CMD ["dex", "serve", "/etc/dex/config.docker.yaml"]