pihole and cloudflared on docker

1. run.sh

#!/bin/bash

set -e

pushd cloudflared
docker build . -t cloudflared
popd

set +e

docker stop pihole && docker rm pihole
docker stop cloudflared && docker rm cloudflared
docker network rm dns-net

set -e

docker network create --driver bridge --subnet=172.19.1.0/24 dns-net

IP="<HOST-MACHINES-IP>"
IPv6=""

DNS1="172.19.1.8"
DNS2="172.19.1.8"

DOCKER_CONFIGS="/home/rancher/pihole-etc"

WEBPASSWORD="<PASSWORD>"

docker run -d \
    --name pihole \
    --network dns-net \
    -p 53:53/tcp -p 53:53/udp \
    -p 80:80 \
    -p 443:443 \
    -v "${DOCKER_CONFIGS}/pihole/:/etc/pihole/" \
    -v "${DOCKER_CONFIGS}/dnsmasq.d/:/etc/dnsmasq.d/" \
    -e ServerIP="${IP}" \
    -e ServerIPv6="${IPv6}" \
    -e DNS1="$DNS1" \
    -e DNS2="$DNS2" \
    -e WEBPASSWORD="${WEBPASSWORD}" \
    --restart=unless-stopped \
    pihole/pihole:latest

docker run -d \
  --name cloudflared \
  --network dns-net \
  --ip 172.19.1.8 \
  --add-host doh.cleanbrowsing.org:185.228.168.168 \
  --restart=unless-stopped \
  cloudflared:latest

2. cloudflared_Dockerfile

# borrowed much from https://github.com/visibilityspots/dockerfile-cloudflared

FROM golang:alpine as gobuild

RUN apk update; \
    apk add git gcc build-base; \
    go get -v github.com/cloudflare/cloudflared/cmd/cloudflared

WORKDIR /go/src/github.com/cloudflare/cloudflared/cmd/cloudflared

RUN go build ./

FROM alpine:latest

RUN apk add --no-cache ca-certificates; \
        rm -rf /var/cache/apk/*;

COPY --from=gobuild /go/src/github.com/cloudflare/cloudflared/cmd/cloudflared/cloudflared /usr/local/bin/cloudflared

# https://doh.cleanbrowsing.org/doh/adult-filter/
CMD ["/bin/sh", "-c", "/usr/local/bin/cloudflared proxy-dns --address 0.0.0.0 --port 53 --upstream https://doh.cleanbrowsing.org/doh/adult-filter/" ]