Ceph: monitoring with the Ceph Admin API
For quite some time, Ceph has an admin API. This article demonstrates and gives some hints to monitor Ceph.
Ceph maintenance with Ansible
Following up this article.
This playbook was made to automate Ceph servers maintenance.
The typical use case is an hardware change.
By running this playbook you will set the noout flag on your cluster, which means that OSD can’t be marked as out of the CRUSH map, but they will be marked as down.
Thus the OSD will not receive any data.
Basically we tell the cluster to do not move any data since the operation will not last for too long.
Ceph: real men use the memstore backend
A simple in-memory backend that stores objects in RAM is available since version 0.76 and will land with Firefly. Quick look at this new feature.
Ansible Ceph playbook updates
It has been two weeks now since we released the Ansible playbook for Ceph. This article is a little update concerning new features and roadmap.
Announcing Ansible playbooks for Ceph!
Ceph: cow based deployment with Ansible :-).
See you at the Cephdays in Frankfurt
A quick post to tell everybody that I’ll be giving a presentation at the Ceph day in Frankfurt. Obviously, I’ll be representing the company I work for, eNovance. The event is next Thursday, February 27, 2014. I am going to talk about Ceph, performance and benchmarking. You can check the details and schedule of the event here. See you there!
Ceph IO patterns: the ugly
Ceph IO patterns analysis final part: The Ugly.
Ceph IO patterns: the bad
Ceph IO patterns analysis part 2: The Bad.
Ceph IO patterns: the good
Ceph IO patterns analysis part 1: The Good.
Ceph: snapshot a RBD instance with QEMU-UTILS
Quick tip to perform a full snapshot of an RBD image. (only MtG players can recognize this picture!)