FROM alpine:3.19.0

RUN apk add --no-cache \
    pdns-recursor \
    py3-pip \
    python3

RUN pip3 install --no-cache-dir --break-system-packages envtpl

RUN mkdir -p /etc/pdns/api.d \
  && chown -R recursor: /etc/pdns/api.d \
  && mkdir -p /var/run/pdns-recursor \
  && chown -R recursor: /var/run/pdns-recursor

ENV VERSION=4.9 \
  PDNS_setuid=recursor \
  PDNS_setgid=recursor \
  PDNS_daemon=no

EXPOSE 53 53/udp

COPY recursor.conf.tpl /
COPY docker-entrypoint.sh /

ENTRYPOINT [ "/docker-entrypoint.sh" ]

CMD [ "/usr/sbin/pdns_recursor" ]