FROM debian:bookworm-slim
LABEL maintainer="docker@ao-it.net"

## prepare requirements
RUN ["bash", "-exo", "pipefail", "-c", "\
    export DEBIAN_FRONTEND=noninteractive ; \
    apt update ; \ 
    apt install -y wget gnupg ; \
    wget -O - https://packages.icinga.com/icinga.key | \
    gpg --dearmor -o /usr/share/keyrings/icinga-archive-keyring.gpg ; \
    source /etc/os-release ; \
    echo \"deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${VERSION_CODENAME} main\" > /etc/apt/sources.list.d/${VERSION_CODENAME}-icinga.list ; \
    echo \"deb-src [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${VERSION_CODENAME} main\" >> /etc/apt/sources.list.d/${VERSION_CODENAME}-icinga.list ; \
    apt clean all ; \
    rm -vrf /var/lib/apt/lists/* "]

## install icinga2 
RUN ["bash", "-exo", "pipefail", "-c", "\
    export DEBIAN_FRONTEND=noninteractive ; \
    apt update ; \
    apt install -y icinga2 monitoring-plugins ; \
    mkdir -p /run/icinga2 ; \
    chown nagios: /run/icinga2 ; \
    apt clean all ; \
    rm -vrf /var/lib/apt/lists/* "]

## create persistend data store
RUN ["bash", "-exo", "pipefail", "-c", "\
    mkdir -p /data ; \
    mkdir -p /data-init/etc/ ; \
    mkdir -p /data-init/var/ ; \
    mkdir -p /data-init/plugins ; \
    mv /etc/icinga2 /data-init/etc/ ; \
    mv /var/lib/icinga2 /data-init/var/ ; \
    mv /usr/lib/nagios/plugins /data-init/ ; \
    ln -vs /data/etc/icinga2 /etc/icinga2 ; \
    ln -vs /data/var/icinga2 /var/lib/icinga2 ; \
    ln -vs /data/plugins /usr/lib/nagios/plugins "]

COPY init.sh /root/init.sh
    
EXPOSE 5665
VOLUME ["/data"]
WORKDIR /data
USER root
ENTRYPOINT [ "bash", "/root/init.sh" ]
CMD [ "/usr/sbin/icinga2", "daemon" ]