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Questions tagged [cephfs]

65 questions
4
votes
3 answers

cephadm: Not able to add nodes to ceph cluster (Error EINVAL: Failed to connect to host)

I followed the following steps from https://docs.ceph.com/en/latest/cephadm/install/ to setup a ceph cluster on Centos 8.1 curl --silent --remote-name --location https://github.com/ceph/ceph/raw/octopus/src/cephadm/cephadm chmod +x cephadm ./cephadm…
Shounak
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3
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1 answer

CephFS Unable to attach or mount volumes: unmounted volumes=[image-store]

I'm having trouble getting my Kube-registry up and running on cephfs. I'm using rook to set this cluster up. As you can see, I'm having trouble attaching the volume. Any idea what would be causing this issue? any help is…
Xcer
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3
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2 answers

How do I fix a dial tcp 10.96.0.1:443: i/o timeout error for Operator pod installed via helm-rook?

I pretty much added the repo with this command helm repo add rook-stable https://charts.rook.io/stable Then I ran the command helm install --namespace rook-ceph-system The operator is created at first but then turns into a…
CoderDude74
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2
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1 answer

Understanding snapshots in Ceph

Our team is currently deciding whether to implement snapshotting on cephfs directories or not, and thus trying to understand the effects and performance issues caused by snapshots on the cluster. Our main concern is "How will the cluster be affected…
NIKHIL KOMMINENI
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2
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2 answers

How to share a cephfs volume between pods in different k8s namespaces

I'm trying to share a cephfs volumes between namespaces within k8s cluster. I'm using ceph-csi with cephfs. Followed https://github.com/ceph/ceph-csi/blob/devel/docs/static-pvc.md#cephfs-static-pvc to create static pv+pvc in both namespaces. Works…
Pav K.
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0 answers

How to seperate BlueStore from ceph and run it solely?

I am learning BlueStore. I want to run it so that I could get a concrete workflow. However, BlueStore is integrated into CEPH which makes it difficult for me to focus only on what I interest. So how could I separate BlueStore from CEPH and run it…
tuffy chow
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1 answer

Error - Unable to attach or mount volumes: unmounted volumes=[data]

I have had weird problems in kubernetes. When I run install command, pods never started. Pvc was bound. It gave errors below order 0/4 nodes are available: 4 pod has unbound immediate PersistentVolumeClaims. Unable to attach or mount volumes:…
Enes Pekkaya
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2
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1 answer

Ceph Nautilus : How to enable the Ceph MGR dashboard

I have recently installed Ceph Nautilus. ceph version 14.2.1 (d555a9489eb35f84f2e1ef49b77e19da9d113972) nautilus (stable) I cannot see any "dashboard" module (neither in enabled nor in disabled state). I an checking through "ceph mgr module ls" If…
user1819071
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2
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0 answers

When we get a file from Ceph, how does Ceph find all objects of this file?

According to Ceph's documentation, when storing a file into Ceph, it is split into many objects first, and CRUSH will then map each object to a placement group. When we read a file from Ceph, we only input the key to to get the file, how does Ceph…
Fish sec
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1
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Kubernetes CephFS Volume - Specify FS-Name

i have the following problem: I want to mount different CephFS-Volumes to my pods but I can only mount the first created CephFS. I have different Filesystems in my Ceph: volume1 volume2 etc. Only "volume1" gets mounted all the time, it doesnt…
GE ownt
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0 answers

AWS S3 using Ceph how to provide a url for an object

I'm starting to work with AWS SDK S3 with Ceph storage platform, and my server needs to provide a URL to some large objects without getting the objects themselves, but only a URL to access the object. Is there a way to do so withCeph? With AWS S3 I…
Eli Zatlawy
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1
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0 answers

What is the difference between cephfs and cephfs volumes?

What scenarios are cephfs volume and subvolume mainly used for, and what is the difference between it and cephfs? My current understanding is that cephfs volumes and subvolumes can provide a way of sharing between docker and OpenStack Manila.…
user15010873
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3 answers

ceph df max available miscalculation

Ceph cluster shows following weird behavior with ceph df output: --- RAW STORAGE --- CLASS SIZE AVAIL USED RAW USED %RAW USED hdd 817 TiB 399 TiB 418 TiB 418 TiB 51.21 ssd 1.4 TiB 1.2 TiB 22 GiB 174 GiB …
Nyquillus
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1
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2 answers

How to use ceph to store large amount of small data

I set up a cephfs cluster on my virtual machine, and then want to use this cluster to store a batch of image data (total 1.4G, each image is about 8KB). The cluster stores two copies, with a total of 12G of available space. But when I store data…
Sc_Cloud
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1 answer

cephfs seems to have a problem with linux 5.11 kernels

Upgraded fedora33 lately and found my cephfs mounts won't work anymore. After hours of debugging and looking around, I realized a new kernel 5.11.X was installed. Before I had 5.10.X. Did reboot with 5.10 and everything was fine. To verify the…
mvh
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