Dynamic DNS

Time Required

5 Minutes

Difficulty

Low

You can use a Dynamic DNS container to automatically update your Cloudflare managed domain, to keep it up to date with your dynamic public IP address

Requirements

• A Cloudflare API key per Generate an API Key

• Your domains DNS will need to be managed by Cloudflare, per Domains

Compose Files

You will be able to use the https://github.com/trentnbauer/agg-docs/blob/main/guides/cloudflare/broken-reference/README.md guide to put these compose files into production

https://github.com/trentnbauer/agg/blob/main/docker-compose/ddns.yml

version: "3"
services:
  play:
    image: oznu/cloudflare-ddns:latest
    restart: always
    environment:
      - API_KEY=$CLOUDFLARE_APIKEY     #Required
      - ZONE=$DOMAIN                   #Required
      - SUBDOMAIN=$SUBDOMAIN           #Not required
      - PROXIED=$PROXIED               #Required: true/false
    logging:
      driver: "json-file"
      options:
        max-size: "5m"
        max-file: "3"

Example .ENV file

CLOUDFLARE_APIKEY=
DOMAIN=
SUBDOMAIN=
PROXIED=true

Some things to note

• If you are setting up DDNS for your root domain, leave the subdomain variable blank

• It is recommended to leave proxied as true but if your service fails to load, try it as false.

• You may need to configure a Cloudflare tunnel, per Tunnel

Confirm the Container is working

Log into Portainer and view the logs for the container, you should see something similar to below

[s6-init] making user provided files available at /var/run/s6/etc...exited 0.
[s6-init] ensuring user provided files have correct perms...exited 0.
[fix-attrs.d] applying ownership & permissions fixes...
[fix-attrs.d] done.
[cont-init.d] executing container initialization scripts...
[cont-init.d] 30-cloudflare-setup: executing... 
DNS Zone: <REDACTED> (ebf622fd8125a2b85523ddd64814a66e)
DNS record for '<REDACTED>' was not found in <REDACTED> zone. Creating now...
DNS Record: <REDACTED> (5109ffe562242554b4a4599b06ffa0f0)
[cont-init.d] 30-cloudflare-setup: exited 0.
[cont-init.d] 50-ddns: executing... 
No DNS update required for <REDACTED> (<REDACTED>).
[cont-init.d] 50-ddns: exited 0.
[cont-init.d] done.
[services.d] starting services
Starting crond...
crond: crond (busybox 1.31.1) started, log level 6
[services.d] done.