CFUPDATER

A fairly simple application that performs Dynamic DNS operations for a CloudFlare Resource Record.

Installation

• On your linux host, create a user for the service:

  sudo useradd -r -s /sbin/nologin cfupdater

• Make a few directories:

  sudo mkdir -p /opt/cfupdater/bin /opt/cfupdater/config /opt/cfupdater/services

• Download the binary and the systemd unit files:

  sudo curl -o /opt/cfupdater/bin/cfupdater_linux_amd64 https://github.com/j4ng5y/cfupdater/releases/download/v0.2.2/cfupdater_linux_amd64
  
  sudo curl -o /opt/cfupdater/services/cfupdater.timer https://github.com/j4ng5y/cfupdater/releases/download/v0.2.2/cfupdater.timer
  
  sudo curl -o /opt/cfupdater/services/cfupdater.service https://github.com/j4ng5y/cfupdater/releases/download/v0.2.2/cfupdater.service

• Run the config-file maker part of the application:

  sudo /opt/cfupdater/bin/cfupdater_linux_amd64 configure \
  --cloudflare-api-token <YOUR_API_TOKEN> \
  --cloudflare-dns-zone-id <YOUR_CLOUDFLARE_DNS_ZONE_ID> \
  --cloudflare-dns-record-name <THE RECORD NAME TO UPDATE> \
  --ipinfo-api-token <YOUR IPINFO.IO API TOKEN>

  This just makes a config.yaml file in the /opt/cfupdater/config directory.

• Create/Enable/Start symlinks for the unit files:

  sudo ln -s /opt/cfupdater/services/cfupdater.timer /etc/systemd/system/cfupdater.timer
  
  sudo ln -s /opt/cfupdater/services/cfupdater.service /etc/systemd/system/cfupdater.service
  
  sudo systemctl daemon-reload
  
  sudo systemctl enable cfupdater.timer

  This will simply run the service 5 minutes after a system reboot and also every 24hours thereafter.

  Note: You can just as easily run the service itself by running a sudo systemctl start cfupdater.service command if you feel the need to do so.

• Move all the files from root's ownership, to the cfupdater user's ownership:

  sudo chown -R cfupdater:cfupdater /opt/cfupdater

TODO

I do plan to make the installation a little less manual, but it serves my purposes as is for the time being, so more to come?