DHCP Settings don't stick after restarts

[Nedlinin]

If you enable DHCP and change settings or create reservations they are lost on container recreation.

https://discourse.pi-hole.net/t/what-files-does-pi-hole-use/1684

This explains the files required. I modified the readme and added a file mounted inside the container for the 2 DHCP ones

  - /volume4/docker/pihole-unbound/pihole/config/pihole-dhcp.conf:/etc/dnsmasq.d/02-pihole-dhcp.conf:rw
  - /volume4/docker/pihole-unbound/pihole/config/pihole-static-dhcp.conf:/etc/dnsmasq.d/04-pihole-static-dhcp.conf:rw

But this should likely be documented somewhere.

[chriscrowe]

Thanks for this-- I don't use Pi-Hole for DHCP so I've not tested it. Can you make a pull request with your fixes to the repo?

[Nedlinin]

@chriscrowe : I mistyped my original report saying I had modified the readme but intended to say the readme should be modified to contain this information.

In the end, DHCP works as expected you just have to know to mount the file into the container such that pihole sees and applies it.

[Staubgeborener]

@Nedlinin could you please provide your full docker-compose? It seems, there are also further configurations needed in order to get DHCP working (like network_mode, etc.). I have issues with DHCP (long story short: DHCP is simply not working, i deactivate the DHCP service on my router and activated it in Pi-Hole -> no internet connection). I am using the one-container example docker-compose.

For completeness, here is my setup (yes, web port is 81 instead 80):

.env

ServerIP=192.168.178.34
TZ=Europe/Berlin
WEBPASSWORD=secret
REV_SERVER=true
REV_SERVER_DOMAIN=local
REV_SERVER_TARGET=192.168.178.1
REV_SERVER_CIDR=192.168.178.0/16
HOSTNAME=nuc
DOMAIN_NAME=pihole.local

docker-compose.yml

version: '2'

volumes:
  etc_pihole-unbound:
  etc_pihole_dnsmasq-unbound:

services:
  pihole:
    container_name: pihole
    image: cbcrowe/pihole-unbound:latest
    hostname: ${HOSTNAME}
    domainname: ${DOMAIN_NAME}
    ports:
      - 444:443/tcp
      - 53:53/tcp
      - 53:53/udp
      - 81:80/tcp
      - 67:67/udp # Only required if you are using Pi-hole as your DHCP server
      - 5335:5335/tcp # Uncomment to enable unbound access on local server
      #- 22/tcp # Uncomment to enable SSH
    cap_add:
      - NET_ADMIN
    environment:
      ServerIP: ${ServerIP}
      #WEB_PORT: 81
      #network_mode: host
      TZ: ${TZ}
      WEBPASSWORD: ${WEBPASSWORD}
      REV_SERVER: ${REV_SERVER}
      REV_SERVER_TARGET: ${REV_SERVER_TARGET}
      REV_SERVER_DOMAIN: ${REV_SERVER_DOMAIN}
      REV_SERVER_CIDR: ${REV_SERVER_CIDR}
      DNS1: 127.0.0.1#5335 # Hardcoded to our Unbound server
      DNS2: 127.0.0.1#5335 # Hardcoded to our Unbound server
      DNSSEC: "true" # Enable DNSSEC
    volumes:
      - etc_pihole-unbound:/etc/pihole:rw
      - etc_pihole_dnsmasq-unbound:/etc/dnsmasq.d:rw
    restart: always

[Nedlinin]

Unfortunately I've migrated over to Adguard Home so I can't say I use this any longer.

The last backup of my config is as follows (with some redactions). This config might have been when I had already partially migrated to Adguard and, as such, you might need to bring back the commented out volume mounts.

Hope this at least gives you some ideas. Good luck!

version: '3.7'

services:
  pihole:
    container_name: pihole
...
    hostname: pi-hole
    mac_address: d0:ca:ab:cd:ef:01
    cap_add:
      - NET_ADMIN
    ports:
      - 443/tcp
      - 53/tcp
      - 53/udp
      - 67/udp
      - 80/tcp
      - 22/tcp
    environment:
      ServerIP: 192.168.1.5
      WEBPASSWORD: ${WEBPASSWORD}
    volumes:
      - /volume4/docker/pihole-unbound/pihole/volume:/etc/pihole
#      - /volume4/docker/pihole-unbound/pihole/config/hosts:/etc/hosts
#      - /volume4/docker/pihole-unbound/pihole/config/resolv.conf:/etc/resolv.conf
#      - /volume4/docker/pihole-unbound/pihole/config/dnsmasq:/etc/dnsmasq.d
#      - /volume4/docker/pihole-unbound/pihole/config/pihole-dhcp.conf:/etc/dnsmasq.d/02-pihole-dhcp.conf:rw
#      - /volume4/docker/pihole-unbound/pihole/config/pihole-static-dhcp.conf:/etc/dnsmasq.d/04-pihole-static-dhcp.conf:rw
#      - /volume4/docker/pihole-unbound/pihole/config/pihole-FTL.conf:/etc/pihole/pihole-FTL.conf

    networks:
      home:
        ipv4_address: 192.168.1.5
    restart: always

networks:
  home:
    driver: macvlan
    driver_opts:
      parent: ovs_eth0
    ipam:
      config:
        - subnet: 192.168.1.0/24