Add a PiHole instance on a macvlan enabled Docker network (Synology eth0 example)

pihole-macvlan-synology-docker.txt

#!/bin/bash

# NAS IP: 192.168.1.10 in this example
# DHCP scope reservation for macvlan: 192.168.1.208/28 (Details below)
## Network:   192.168.1.208/28      11000000.10101000.00000001.1101 0000 (Class C)
## HostMin:   192.168.1.209         11000000.10101000.00000001.1101 0001
## HostMax:   192.168.1.222         11000000.10101000.00000001.1101 1110
## Hosts/Net: 14                    (Private Internet)

# Create a macvlan Docker network using eth0
docker network create --driver=macvlan --gateway=192.168.1.1 --subnet=192.168.1.10/24 -o parent=eth0 macvlan

# Create a Synology macvlan0 bridge network attached to the physical eth0, and add the ip range scope (sudo)
ip link add macvlan0 link eth0 type macvlan mode bridge
ip addr add 192.168.1.208/28 dev macvlan0
ifconfig macvlan0 up

# It's also possible to create a scheduled task at startup as the root user, it's wise to append the following in front of the above commands
while ! ip link show eth0 | grep -q 'state UP'; do
    sleep 1
done

# Perform a basic test with NGINX
docker run --net=macvlan -d --ip=192.168.1.210 -p 80:80 nginx

# Browse to http://192.168.1.210 in your local network, you should see the nginx welcome page! ...Don't forget to remove the container afterwards...

# Now start PiHole on a macvlan enabled IP address f.e.
# Also I've added a fake mac address so the container always uses the samen mac, handy to make a reservation in your DHCP scope or do whatever you like to do with it.
DOCKERHOME=<some path>
NAME=pihole-macvlan
IMAGE=pihole/pihole
docker run --detach \
           --name ${NAME} \
           --restart always \
           --volume /etc/localtime:/etc/localtime:ro \
           --volume ${DOCKERHOME}/data/${NAME}/config:/etc/pihole \
           --volume ${DOCKERHOME}/data/${NAME}/dnsmasq.d:/etc/dnsmasq.d \
           --cap-add NET_ADMIN \
           --dns=127.0.0.1 \
           --dns=1.1.1.1 \
           --env "DNS1=1.1.1.1" \
           --env "DNS2=1.0.0.1" \
           --env "ServerIP=192.168.1.210" \
           --env "DNSMASQ_LISTENING=all" \
           --env "WEBPASSWORD=<secret>" \
           --env "TZ=Europe/Amsterdam" \
           --network macvlan \
           --ip "192.168.1.210" \
           --mac-address "02:42:c0:a8:01:d7" \
           ${IMAGE}
           
# Happy days!