add zerotier

zerotier/Dockerfile

@@ -0,0 +1,28 @@
+## NOTE: to retain configuration; mount a Docker volume, or use a bind-mount, on /var/lib/zerotier-one
+
+FROM debian:buster-slim as builder
+
+## Supports x86_64, x86, arm, and arm64
+
+RUN apt-get update && apt-get install -y curl gnupg
+RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 0x1657198823e52a61  && \
+    echo "deb http://download.zerotier.com/debian/buster buster main" > /etc/apt/sources.list.d/zerotier.list
+RUN apt-get update && apt-get install -y zerotier-one=1.4.4
+COPY ext/installfiles/linux/zerotier-containerized/main.sh /var/lib/zerotier-one/main.sh
+
+FROM debian:buster-slim
+LABEL version="1.4.4"
+LABEL description="Containerized ZeroTier One for use on CoreOS or other Docker-only Linux hosts."
+
+# ZeroTier relies on UDP port 9993
+EXPOSE 9993/udp
+
+RUN mkdir -p /var/lib/zerotier-one
+COPY --from=builder /usr/sbin/zerotier-cli /usr/sbin/zerotier-cli
+COPY --from=builder /usr/sbin/zerotier-idtool /usr/sbin/zerotier-idtool
+COPY --from=builder /usr/sbin/zerotier-one /usr/sbin/zerotier-one
+COPY --from=builder /var/lib/zerotier-one/main.sh /main.sh
+
+RUN chmod 0755 /main.sh
+ENTRYPOINT ["/main.sh"]
+CMD ["zerotier-one"]

zerotier/main.sh

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+#!/bin/sh
+
+export PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin
+
+if [ ! -e /dev/net/tun ]; then
+	echo 'FATAL: cannot start ZeroTier One in container: /dev/net/tun not present.'
+	exit 1
+fi
+
+exec "$@"
+
+
+if ! [[ -z "${NETWORK_ID}" ]]; then
+	zerotier-cli join ${NETWORK_ID}
+fi