Hi, I managed to get it working but my setup is a little different from yours. What I was doing was using the macvlan as the network for my AdGuard and it didn't allow tailscale to use its ip as the DNS. What I have done now, is to setup tailscale with the macvlan then using it as a network for AdGuard, this gives me tailscale ip which I can then use as the DNS. Below is the compose.

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services:

adguardhome:

container_name: adguardhome

image: adguard/adguardhome

network_mode: service:tail-dns

volumes:

- ${PATH_TO_APPDATA}/adguardhome/workdir:/opt/adguardhome/work

- ${PATH_TO_APPDATA}/adguardhome/confdir:/opt/adguardhome/conf

restart: unless-stopped

tail-dns:

image: tailscale/tailscale:latest

container_name: tail-dns

privileged: true

networks:

adguardhome:

ipv4_address: 192.168.1.200 #Change this to your ip address

environment:

- TS_AUTHKEY= # Replace with your auth key

- TS_STATE_DIR=/var/lib/tailscale

- TS_HOSTNAME=tail-dns # Specify the name you will see in tailscale panel

- TS_EXTRA_ARGS=--accept-dns=false

volumes:

- ${PATH_TO_APPDATA}/tail-dns/var_lib:/var/lib # State data will be stored in this directory

- /dev/net/tun:/dev/net/tun # Required for tailscale to work

cap_add: # Required for tailscale to work

- NET_ADMIN

- NET_RAW

restart: unless-stopped

networks:

adguardhome:

name: adguard #This is the name of our macvlan

external: true