Questions tagged [ceph]
For Ceph, the open-source, distributed storage system, mounted as CephFS using FUSE or NFSv4.
58 questions
2 votes
1 answer
116 views
How to obtain RHEL 8 repo that contain ceph-fuse and install it?
We have planned a ceph upgrade to reef 18.2.7, and it says that Client Kernel drivers older than in Kernel 5.4 are not supported. There is 1 RHEL 8 machine with Kernel 4.18. I tried to mount cephfs ...
- 133
0 votes
0 answers
102 views
Mount error Ceph storage
I'm trying to mount CephFS to my host. mount -t ceph -o name=admin,secretfile=/etc/ceph/admin.secret 192.168.1.88:/exports/data/ /rhev/data-center/mnt/ But I get an error: mount error 2 = No such ...
- 123
1 vote
1 answer
773 views
Ceph crush rules explanation for multiroom/racks setup
I started recently with ceph, inherited 1 large cluster for maintenance and now building recovery cluster. By game of trial and failure I managed to create crush rules to fit my purpose but failed to ...
- 133
1 vote
0 answers
365 views
My Ceph mon on one node fail and won't start
I have A ceph on 3 node working for a year. I get a HEALTH_WARN about : 2 OSD have spurious read erros 1/3 mons down, quorum ceph01,ceph03 I tried to start mon on ceph02. But not working. xxxxxxx@...
- 11
1 vote
0 answers
443 views
How to isolate cpu cores, even from kernel space, at boot?
I have a faulty Ryzen 5900X desktop CPU. Previously, I somewhat tamed its faulty cores via isolcpus=2,3,14,15 kernel parameter in GRUB2 (see https://blog.cbugk.com/post/ryzen-5850x/). However, on ...
- 446
1 vote
1 answer
117 views
is it possible to run a ceph rbd on erasure coded ceph pool, without a separate replicated metadata pool?
I'm new to ceph so forgive me if this is common knowledge, but I can't find it. This seems like a simple question, but I can't find any solid answer. In 2017 when rbd on ec pools was first implemented,...
- 143
0 votes
0 answers
624 views
Ceph non-replicated pool (replication 1)
I have a 10 node cluster. I want to create a non-replicated pool (replication 1) and I want to ask some questions about it: Let me tell you my use case: I don't care about losing data, All of my data ...
- 439
1 vote
1 answer
1k views
CEPH can't find OSD's
I installed ceph cluster using cephadm and bootstrapping. I can view disks via inventory, but they do not show in the device list. Why is this the case? How can I add a disk to the cluster? root@RX570:...
