initial commit

.gitignore

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+.env
+tmp/

Dockerfile

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+ARG VERSION
+FROM registry.opensuse.org/opensuse/tumbleweed:${VERSION}
+
+VOLUME /config
+
+
+RUN zypper --non-interactive install --no-recommends \
+  dnsmasq \
+  && zypper clean -a \
+  rm /var/log/zypper.log
+
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+CMD ["start"]

Makefile

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+.PHONY: default build clean release
+
+-include .env
+
+VERSION=20230411
+IMAGENAME=dnsmasq
+REPO=docker.io/bardak
+
+SHELL := /bin/bash
+
+default: build
+
+guard:
+	@ if [ -z "$(git status --porcelain)" ]; then echo "git repo not clean"; exit 1; fi
+
+build:
+	podman build --build-arg VERSION=$(VERSION) --tag ${REPO}/${IMAGENAME}:$(VERSION) .
+
+clean:
+	podman image rm ${REPO}/${IMAGENAME}:$(VERSION)
+
+release: guard clean build
+	git tag v$(VERSION)
+	git push origin v$(VERSION)
+	podman push --creds $(USERNAME):$(PASSWORD) ${REPO}/${IMAGENAME}:$(VERSION)

entrypoint.sh

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+#!/usr/bin/env bash
+
+if [[ ! -f /config/dnsmasq.conf ]]; then
+    echo "* Creating /config/dnsmasq.conf"
+    sed 's/^conf-dir=\/etc\//conf-dir=\/config\//g' /etc/dnsmasq.conf > /config/dnsmasq.conf
+fi
+if [[ ! -f /config/hosts/hosts ]]; then
+    echo "* Creating /config/hosts/hosts"
+    mkdir /config/hosts
+    cp /etc/hosts /config/hosts/hosts
+fi
+if [[ ! -f /config/resolv.conf ]]; then
+    echo "* Creating /config/resolv.conf"
+    cp /etc/resolv.conf /config/resolv.conf
+fi
+if [[ ! -d /config/dnsmasq.d ]]; then
+    echo "* Creating /config/dnsmasq.d"
+    mkdir /config/dnsmasq.d
+fi
+
+if [[ "$1" == "start" ]]; then
+    /usr/sbin/dnsmasq \
+        --conf-fil=/config/dnsmasq.conf \
+        --no-daemon --no-hosts  \
+        --keep-in-foreground \
+        --resolv-file=/config/resolv.conf \
+        --hostsdir=/config/hosts
+else
+    exec "$@"
+fi