Changing web port when using Docker

sombrafam · July 21, 2024, 5:23pm

How do I configure lighttpd.conf if I'm using docker? I didn't see any options to set it there.

rdwebdesign · July 21, 2024, 6:38pm

In docker you don't need to change lighttpd port configuration. You just need to publish a different port for your container. This is how docker works.

Adding -p 8080:80 to your docker run command will publish the web interface on port 8080 (inside the container lighttpd will use the default port).

sombrafam · July 23, 2024, 2:27pm

I'm using network_mode: "host"'', so I needed to get rid of the port mapping. I managed to configure and make it work using this configuration:

# More info at https://github.com/pi-hole/docker-pi-hole/ and https://docs.pi-hole.net/
version: '3'
services:
  pihole:
    restart: unless-stopped
    container_name: pihole
    image: pihole/pihole:nightly
    network_mode: "host"
    environment:
      TZ: 'America/Sao_Paulo'
      WEBPASSWORD: 'd57d1c269f44'
      DNSMASQ_LISTENING: 'all'
    # Volumes store your data between container upgrades
    volumes:
      - '/srv/data/pihole/etc-pihole:/etc/pihole'
      - '/srv/data/pihole/etc-dnsmasq.d:/etc/dnsmasq.d'
      - '/srv/wayhome-script/pihole/lighttpd:/etc/lighttpd'
    #   https://github.com/pi-hole/docker-pi-hole#note-on-capabilities
    cap_add:
      - NET_ADMIN # Required if you are using Pi-hole as your DHCP server, else not needed
      - CAP_SYS_NICE paste

The drawback of that is that I needed to first start pihole, let it populate the folder, then restart it.

Bucking_Horn · July 23, 2024, 2:39pm

If you'd want to switch away from port 80 when using Docker's host network mode, simply set the WEB_PORT environment variable for your Pi-hole container.

sombrafam · July 23, 2024, 2:58pm

I tried that, it didn't work for metry it that, I did it didn't work for me. I think it doesn't work since the config is hard coded in lighttpd.conf

PromoFaux · July 23, 2024, 3:21pm

There is code in the docker start up script to replace the one inside the container's lighttpd.conf:

github.com

pi-hole/docker-pi-hole/blob/d4dd6b0a41bfb06629a5544d18680d5cce43c8f2/src/s6/debian-root/usr/local/bin/bash_functions.sh#L395-L416


      
          setup_web_port() {
              local warning="  [!] WARNING: Custom WEB_PORT not used"
              # Quietly exit early for empty or default
              if [[ -z "${WEB_PORT}" || "${WEB_PORT}" == '80' ]] ; then return ; fi
          
              if ! echo "$WEB_PORT" | grep -q '^[0-9][0-9]*$' ; then
                  echo "$warning - $WEB_PORT is not an integer"
                  return
              fi
          
              local -i web_port="$WEB_PORT"
              if (( web_port < 1 || web_port > 65535 )); then
                  echo "$warning - $web_port is not within valid port range of 1-65535"
                  return
              fi
              echo "  [i] Custom WEB_PORT set to $web_port"
              echo "  [i] Without proper router DNAT forwarding to ${WEB_BIND_ADDR:-$FTLCONF_LOCAL_IPV4}:$web_port, you may not get any blocked websites on ads"
          
              # Update lighttpd's port
              sed -i '/server.port\s*=\s*80\s*$/ s/80/'"${WEB_PORT}"'/g' /etc/lighttpd/lighttpd.conf

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That said, I see you are volume mounting the /etc/lighttpd directory. Any reason for this? This may be causing all sorts of issues!

sombrafam · August 22, 2024, 1:35pm

The reason was that I couldn't make the environment variable to work (I must have done something wrong that don't know now, since you are saying that it should work), so I mainly edited the config file and created it as a mount.

PromoFaux · August 23, 2024, 6:05pm

This will all be much easier with the v6 container as we wont need to deal with dynamically updating lighttpd config files