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Questions tagged [ceph]

Ceph is a free software storage platform designed to present object, block, and file storage from a single distributed computer cluster.

Ceph is a free software storage platform designed to present object, block, and file storage from a single distributed computer cluster. Ceph's main goals are to be completely distributed without a single point of failure, scalable to the exabyte level, and freely-available.

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Ceph Cluster - Reduced data availability: 96 pgs inactive And All OSD Nodes Are Down

I set up my Ceph Cluster by following this document. I have one Manager Node, one Monitor Node, and three OSD Nodes. The problem is that right after I finished setting up the cluster, the ceph health returned HEALTH_OK for all three nodes. However,…
Shaghayegh Tavakoli
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Pipe rbd export comand to tar to create compressed export

Is it possible to pipe the output of rbd export directly to something else like tar to create a compressed archive of the .img file without having to write to disk first? Something like rbd export Pool/image | tar -czvf image.img.zst Or do I just…
cclloyd
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Openstack Using Ceph Erasure Code Pool

I tried configuring openstack with ceph pool erasure code backend I'm trying to using —data-pool on ceph.conf using rbd default data pool like the following blog https://themeanti.me/technology/2018/08/23/ceph_erasure_openstack.html , but I'm still…
Prasta Maha
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ceph-deploy install --release fails to upgrade on debian stretch

this is my first post on serverfault! I'm trying to setup a test ceph cluster to see if it can meet our storage needs. I've been following the instructions here I ran into some permissions issues when deploying the mgr. Turns out debian was…
brichter
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Data resiliency in Ceph or Gluster

Say I am most concerned with keeping my data safe from physical hard drive failure and the computer it connects to directly. RAID1 and RAID5 I understand. They provide protections against data loss due to hardware issues. How does Gluster and Ceph…
Dave Pearce
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Memory level for Ceph logs. What's this for?

I want to increase the logging level of some OSDs, but I don't understand what the memory level is for. I didn't find an exact explanation in the documentation. Is there a need to increase this level? OSD logs are written in rsyslog.
akashavkin
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Does Kubeadm reset delete persistent volumes

I need to change the advertise address of my Kubernetes master node. I can do this with a kubeadm reset, but I don't want to lose my (rook-ceph) persistent volumes on the master node. Is it safe to do a kubeadm reset or do I need to backup my PVs…
John Brandli
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OpenStack redundant shared storage backend solution

Which storage backends are recommended for OpenStack which allows live migration and shared storage? Is it NFS / Ceph / storage backend drivers to commercial storage solutions? Which of these is better? In VMware vSphere it's possible to use iSCSI…
jwalker
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Error running ceph-deploy install

I have been following the following tutorial to setup ceph on CentOS https://wiki.centos.org/SpecialInterestGroup/Storage/ceph-Quickstart When I try to run ceph-deploy to install to my other nodes, I get the following error: [ceph-deploy@ceph-admin…
Bert
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Ceph hardware sizing calculator

I would like to calculate the Hardware sizing for a ceph cluster. There are so few references to the sizing, that I try to get these details here in the community. E.g. what shall i have depending on spindle drives (7.2k, 10k, 15k) SATA & SAS 6G…
cilap
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Cephadm + Openstack Keystone Integration

Hello I am trying to Integrate Openstack Keystone as Ceph authentication Mechanism So i can use ceph object storage as openstack swift backend Environment: Kernel : Ubunutu Server LTS 22.04 (minimal) Openstack : Zed (Manual Installation) Ceph :…
Hoodad Tabibi
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What's the best way to sync folders across 03 or more webservers?

I have 03 servers and I want to sync some folders across them. I'm using DRBD + OCFS2 for a year or so, but it doesn't support more than 02 servers right now. I read about GlusterFS and CEPH, but there are a lot of bad reviews about them related to…
Steve Lacerda
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How exactly are Distributed File Systems used in cloud environment?

How exactly are Distributed File Systems used in cloud environment ? More precisely: Are live VMs images (or their filesystem) usually located in the DFS ? Are VMs usually used to run the backbone (actual code) of DFS structure ? Precise example…
vaab
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Backup solution for medium infrastructure with commodity hardware

I'm looking for recommendations for a backup solution for our Infrastructure. We have lots of old Hardware, which is not very fast but just laying around. We have like 20 Servers for backup with 8-16GB RAM, AMD FX4300 to FX 8350 and many different…
Simon Sutter
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