I’m also using Rook on BM. I had never used K8s before, so that was the learning curve, e.g. translating the example YAML files into the Helm charts we needed, and the label / taint / toleration dance to fit the square peg of pinning services to round hole nodes. We’re using Kubespray ; I gather there are other ways of deploying K8s?
Some things that could improve: * mgrs are limited to 2, apparently Sage previously said that was all anyone should need. I would like to be able to deploy one for each mon. * The efficiency of `destroy`ing OSDs is not exploited, so replacing one involves more data shuffling than it otherwise might * I’m specifying 3 RGWs but only getting 1 deployed, no idea why * Ingress / load balancer service for multiple RGWs seems to be manual * Bundled alerts are kind of noisy * I’m still unsure what Rook does dynamically, and what it only does at deployment time (we use ArgoCD). I.e., if I make changes, what sticks and what’s trampled? * How / if one can bake configuration (as in `ceph.conf` entries) into the YAML files vs manually running “ceph config” * What the sidecars within the pods are doing, if any of them can be disabled * Requests / limits for various pods, especially when on dedicated nodes. Plan to experiment with disabling limits and setting `autotune_memory_target_ratio` and `osd_memory_target_autotune` * Documentation for how to do pod-specific configuration, i.e. setting the number of OSDs per node when it isn’t uniform. A colleague helped me sort this out, but I’m enumerating each node - would like to be able to do so more concisely, perhaps with a default and overrides. > On Jul 6, 2023, at 4:13 AM, Joachim Kraftmayer - ceph ambassador > <joachim.kraftma...@clyso.com> wrote: > > Hello > > we have been following rook since 2018 and have had our experiences both on > bare-metal and in the hyperscalers. > In the same way, we have been following cephadm from the beginning. > > Meanwhile, we have been using both in production for years and the decision > which orchestrator to use depends from project to project. e.g., the features > of both projects are not identical. > > Joachim > > ___________________________________ > ceph ambassador DACH > ceph consultant since 2012 > > Clyso GmbH - Premier Ceph Foundation Member > > https://www.clyso.com/ > > Am 06.07.23 um 07:16 schrieb Nico Schottelius: >> Morning, >> >> we are running some ceph clusters with rook on bare metal and can very >> much recomend it. You should have proper k8s knowledge, knowing how to >> change objects such as configmaps or deployments, in case things go >> wrong. >> >> In regards to stability, the rook operator is written rather defensive, >> not changing monitors or the cluster if the quorom is not met and >> checking how the osd status is on removal/adding of osds. >> >> So TL;DR: very much usable and rather k8s native. >> >> BR, >> >> Nico >> >> zs...@tuta.io writes: >> >>> Hello! >>> >>> I am looking to simplify ceph management on bare-metal by deploying >>> Rook onto kubernetes that has been deployed on bare metal (rke). I >>> have used rook in a cloud environment but I have not used it on >>> bare-metal. I am wondering if anyone here runs rook in bare-metal? >>> Would you recommend it to cephadm or would you steer clear of it? >>> _______________________________________________ >>> ceph-users mailing list -- ceph-users@ceph.io >>> To unsubscribe send an email to ceph-users-le...@ceph.io >> >> -- >> Sustainable and modern Infrastructures by ungleich.ch >> _______________________________________________ >> ceph-users mailing list -- ceph-users@ceph.io >> To unsubscribe send an email to ceph-users-le...@ceph.io > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
