Dockerfile.cloudflared

ARG ALPINE_VERSION=3.19.1

FROM alpine:${ALPINE_VERSION}

# Root for GitHub, hardly likely to change for a long while...
ARG GITHUB_ROOT=https://github.com

# Build time arguments for where to look for the releases of cloudflared and the
# version to use.
ARG CLOUDFLARED_DOWNLOAD=${GITHUB_ROOT}/cloudflare/cloudflared/releases/download
ARG CLOUDFLARED_VERSION=2023.5.0


# Metadata
LABEL MAINTAINER=efrecon+github@gmail.com
LABEL org.opencontainers.image.title="cloudflared"
LABEL org.opencontainers.image.description="Dockerised cloudflared binary"
LABEL org.opencontainers.image.authors="Emmanuel Frécon <efrecon+github@gmail.com>"
LABEL org.opencontainers.image.url="$GITHUB_ROOT/efrecon/sshd-cloudflared"
LABEL org.opencontainers.image.documentation="$GITHUB_ROOT/efrecon/sshd-cloudflared/README.md"
LABEL org.opencontainers.image.source="$GITHUB_ROOT/efrecon/sshd-cloudflared"


# Install curl and download the cloudflared binary at the requested version.
RUN apk add --no-cache curl && \
    case "$(uname -m)" in \
        "x86_64")   CLOUDFLARED_ARCH=amd64;; \
        "i686")     CLOUDFLARED_ARCH=386;; \
        "aarch64")  CLOUDFLARED_ARCH=arm64;; \
        "armv7l")   CLOUDFLARED_ARCH=arm;; \
    esac && \
    CLOUDFLARED_URL="${CLOUDFLARED_DOWNLOAD}/$CLOUDFLARED_VERSION/cloudflared-$(uname -s|tr '[:upper:]' '[:lower:]')-${CLOUDFLARED_ARCH}" && \
    printf "Downloading cloudflared binary release from: %s\n" "$CLOUDFLARED_URL" && \
    curl \
        --location \
        --silent \
        --show-error \
        --output /usr/local/bin/cloudflared \
        "$CLOUDFLARED_URL" && \
    chmod a+x /usr/local/bin/cloudflared

ENTRYPOINT [ "/usr/local/bin/cloudflared" ]