Developer Builds GitOps DNS System for Homelab After Single Typo Caused Full Outage

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A homelab operator turned to GitOps-style DNS management after a single typo in a hosts file triggered a cascading failure that took down a Proxmox cluster, Ceph storage, and all running containers. The solution uses dnsmasq, GitHub, Bash, and a cronjob to store all DNS host entries in a version-controlled repository with automated syncing. SSH deploy keys restrict repository access to the DNS server, reducing the risk of unauthorised changes. Host entries are split into modular numbered configuration files under /etc/hosts.d/, making them easier to manage, review, and expand. The workflow validates configurations before restarting dnsmasq and records each applied commit hash to maintain a clear audit trail.

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