https://www.apt-upgrade.me/tag/netlink/One nerd's homelab: Linux, Kubernetes, security, and the occasional disaster.en-USMon, 21 Sep 2026 21:50:44 +0200https://www.apt-upgrade.me/2026/09/21/bare-metal-to-k3s-a-nextcloud-migration-battle-log/Mon, 21 Sep 2026 21:50:44 +0200https://www.apt-upgrade.me/2026/09/21/bare-metal-to-k3s-a-nextcloud-migration-battle-log/<p>Today I moved a production <a href="https://nextcloud.com/">Nextcloud</a> from a cozy <strong>native bare-metal install</strong> to a shiny <strong>K3s/container</strong> stack. On paper: pull a backup, restore it, flip DNS, done. In practice: a series of small landmines, each invisible until you step on it. Here&rsquo;s the battle log. 🪖</p> <h2 id="step-1-shovel-the-data-">Step 1: shovel the data 🚚</h2> <p>The heavy lifting was an <code>rsync</code> of ~360 GB of user data plus a ~330 MB SQL dump from the backup box into the new node. Because I pre-synced earlier in the day, the final run only shipped the delta — the whole thing came down to a fast incremental copy. Lesson old as time: <em>pre-seed, then the cutover sync is tiny.</em></p>