An Oci Registry for Ci - Series - Roland's Dev Bloghttps://rolandsdev.blog/series/an-oci-registry-for-ci/An Oci Registry for Ci - Series - Roland's Dev BlogHugo -- gohugo.ioenSun, 18 Oct 2026 16:00:00 +0900Replacing our CI registry with Harbor on Garagehttps://rolandsdev.blog/posts/replacing-our-ci-registry-with-harbor-on-garage/Sun, 18 Oct 2026 16:00:00 +0900rolandjitsuhttps://github.com/rolandjitsurolandjitsu@gmail.comhttps://rolandsdev.blog/posts/replacing-our-ci-registry-with-harbor-on-garage/Over the past month and a half I’ve been rolling out a new OCI registry for our CI: Harbor as the registry, Garage as the S3 storage behind it, on Kubernetes. It was quite the journey - a couple of incidents, a lot of measuring, and a pile of lessons about what actually limits a registry under CI load.

This is part 1: why we built it, the design, and the things that broke before it even carried real traffic. Part 2 will be the throughput hunt (every layer we fixed, and the surprising number that didn’t improve). Part 3 is the storage war - including the weekend I already wrote about in the fstrim post.

]]>Reclaim deleted disk space with fstrim in Longhornhttps://rolandsdev.blog/posts/reclaim-deleted-disk-space-with-fstrim-in-longhorn/Sat, 17 Oct 2026 17:30:00 +0900rolandjitsuhttps://github.com/rolandjitsurolandjitsu@gmail.comhttps://rolandsdev.blog/posts/reclaim-deleted-disk-space-with-fstrim-in-longhorn/For the past month or so I’ve been rolling out a scalable, high-throughput OCI registry for our CI: Harbor as the registry, Garage as the S3 storage behind it, on Kubernetes with Longhorn providing the volumes (that has since changed, but it’s the setup this story happened on). That journey is worth a few posts on its own (and I plan to write them, at some point), but this one is about a single thing that caught me off guard on a Saturday morning: deleting data does not free disk space. Not on Longhorn, and not on most thin-provisioned storage - until something explicitly tells the layer below which blocks are no longer in use.

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