Improve Bind9 configuration

dns/Dockerfile

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+FROM ubuntu:24.04
+
+RUN apt-get update && \
+    apt-get install -y \
+        bind9 \
+        vim \
+        nano \
+        dnsutils \
+        tcpdump \
+        traceroute \
+        && rm -rf /var/lib/apt/lists/*
+
+RUN sed 's/include "\/etc\/bind\/named.conf.default-zones";//g' /etc/bind/named.conf
+RUN echo "include \"/etc/dns/master.conf\";" > /etc/bind/named.conf.local
+
+COPY start.sh /start.sh
+COPY restart-bind /usr/bin
+
+RUN mkdir /etc/dns
+RUN touch /etc/dns/master.conf
+
+VOLUME /etc/dns
+
+EXPOSE 53
+CMD ["/bin/sh", "/start.sh"]

dns/README.md

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+# DNS server container
+
+## Useful commands
+* `named-checkconf`: Check Bind9 configuration
+* `restart-bind`: Restart Bind9

dns/build.sh

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+#!/bin/sh
+sudo docker build -t pierre42100/gns3-appliance-dns .

dns/restart-bind

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+#!/bin/sh
+pkill named
+/usr/sbin/named

dns/start.sh

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+#!/bin/sh
+/usr/sbin/named
+while true; do /bin/bash; done