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Dockerfile
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FROM rust:latest AS builder
ENV DEBIAN_FRONTEND=noninteractive
RUN rustup target add x86_64-unknown-linux-musl
RUN apt update && apt install -y musl-tools musl-dev
RUN update-ca-certificates
# Create appuser
ENV USER=cloudmon
ENV UID=10001
RUN adduser \
--disabled-password \
--gecos "" \
--home "/nonexistent" \
--shell "/sbin/nologin" \
--no-create-home \
--uid "${UID}" \
"${USER}"
WORKDIR /cloudmon
# copy over your manifests
COPY ./Cargo.toml ./Cargo.toml
COPY ./src ./src
RUN cargo build --target x86_64-unknown-linux-musl --release -v
##############
## Final image
##############
FROM scratch as cloudmon-plugin-loadbalancer
# Import from builder.
COPY --from=builder /etc/passwd /etc/passwd
COPY --from=builder /etc/group /etc/group
WORKDIR /cloudmon
# Copy our build
COPY --from=builder /cloudmon/target/x86_64-unknown-linux-musl/release/cloudmon-plugin-loadbalancer ./
# Use an unprivileged user.
USER cloudmon:cloudmon
ENV PATH=/cloudmon
CMD ["/cloudmon/cloudmon-plugin-loadbalancer"]
#################
## Init container
#################
FROM alpine as cloudmon-plugin-loadbalancer-init
WORKDIR /cloudmon
COPY ./grafana ./grafana
RUN rm -rf /cloudmon/init/grafana \
&& mkdir /cloudmon/init \
&& tar cvfz /cloudmon/init/grafana.tar.gz grafana \
&& rm -rf /cloudmon/grafana
CMD ["/bin/sh"]