docker-nagios-4/Dockerfile

FROM ubuntu:focal

# Packages: update & install
RUN apt-get update -qq && \
    DEBIAN_FRONTEND=noninteractive apt-get install -qq -y --no-install-recommends python3-pip supervisor build-essential apache2 libapache2-mod-php7.4 snmp-mibs-downloader apache2-utils wget curl samba-common samba-common-bin smbclient snmp whois traceroute libgd-dev libssl-dev libnet-snmp-perl libperl-dev libpq5 libsensors5 libsnmp-base libtalloc2 libtdb1 libwbclient0 libmysqlclient-dev unzip inetutils-ping sudo openssh-client bind9-dnsutils file && \
    pip3 install j2cli && \
    update-alternatives --install /usr/bin/python python $(which python3) 2  # Workaround for nagios scripts wanting python2 as "python"

# Const
ENV NAGIOS_PHP_TIMEZONE=UTC \
    NAGIOS_TARBALL=https://phoenixnap.dl.sourceforge.net/project/nagios/nagios-4.x/nagios-4.4.6/nagios-4.4.6.tar.gz \
    NAGIOS_PLUGINS_TARBALL=https://www.nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz \
    NAGIOS_NRPE_TARBALL=https://phoenixnap.dl.sourceforge.net/project/nagios/nrpe-4.x/nrpe-4.0.3/nrpe-4.0.3.tar.gz \
    NAGIOS_NSCA_TARBALL=https://phoenixnap.dl.sourceforge.net/project/nagios/nsca-2.x/nsca-2.10.0/nsca-2.10.0.tar.gz
# Using manual: https://raymii.org/s/tutorials/Nagios_Core_4_Installation_on_Ubuntu_12.04.html

#https://kent.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.15/nrpe-2.15.tar.gz \

# Users
RUN groupadd -g 3000 nagios && \
    useradd -u 3000 -g nagios -G www-data -m -s /bin/bash nagios

# Install nagios
RUN mkdir -p /usr/local/src/nagios4 && \
    cd /usr/local/src/nagios4 && \
    wget -q $NAGIOS_TARBALL -O- | tar -zxp --strip-components 1 && \
    ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios --with-command-user=nagios --with-command-group=nagios && \
    make -j8 all && \
    make install install-init install-config install-commandmode && \
    ln -s /usr/local/nagios/etc /etc/nagios

# Install nagios plugins
RUN mkdir -p /usr/local/src/nagios4-plugins && \
    cd /usr/local/src/nagios4-plugins && \
    wget -q $NAGIOS_PLUGINS_TARBALL -O- | tar -zxp --strip-components 1 && \
    ./configure --with-nagios-user=nagios --with-nagios-group=nagios --with-openssl=/usr/bin/openssl --enable-perl-modules --enable-libtap && \
    make -j8 && \
    make install

# Install nagios NRPE
RUN mkdir -p /usr/local/src/nagios4-nrpe && \
    cd /usr/local/src/nagios4-nrpe && \
    wget -q $NAGIOS_NRPE_TARBALL -O- | tar -zxp --strip-components 1 && \
    ./configure --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib/x86_64-linux-gnu && \
    make -j8 all && \
    make install install-plugin install-daemon install-config

# Install nagios NSCA
RUN mkdir -p /usr/local/src/nagios4-nsca && \
    cd /usr/local/src/nagios4-nsca && \
    wget -q $NAGIOS_NSCA_TARBALL -O- | tar -zxp --strip-components 1 && \
    ./configure --with-nsca-user=nagios --with-nsca-grp=nagios && \
    make -j8 all && \
    cd /usr/local/src/nagios4-nsca && \
    cp sample-config/nsca.cfg sample-config/send_nsca.cfg /etc/nagios/ && \
    cp src/send_nsca src/nsca /usr/local/bin/ && \
    chmod 644 /etc/nagios/nsca.cfg

# Clean-up
RUN rm -rf /usr/local/src/nagios*

# Add files
ADD conf /root/conf

# Configure: php
RUN j2 /root/conf/php.ini > /etc/php/7.4/mods-available/custom.ini && \
    phpenmod custom

# Configure: apache
ADD conf/apache2-site.conf /etc/apache2/sites-available/nagios.conf
RUN a2dissite 000-default && \
    a2ensite nagios && \
    a2enmod cgi

# Configure: supervisor
ADD conf/supervisor-all.conf /etc/supervisor/conf.d/

# Configure: nagios
RUN bash -c 'mkdir -p /etc/nagios/conf.d /etc/nagios/conf.d/{hosts,services,timeperiods,templates,hostgroups,servicegroups,contacts}' && \
    echo 'cfg_dir=/etc/nagios/conf.d/' >> /etc/nagios/nagios.cfg && \
    sed -i 's~^url_html_path=.*~url_html_path=/~' /etc/nagios/cgi.cfg

# Runner
ADD run.sh /root/run.sh

# Declare
VOLUME ["/etc/nagios/", "/usr/local/nagios/var/"]
EXPOSE 80
EXPOSE 5666
EXPOSE 5667

CMD ["/root/run.sh"]