Analyse OpenStack guest writes and reads running on Ceph
Analyse IO pattern of all your guest machines.
Read more →Quick and efficient Ceph DevStacking
Recently I built a little repository on github/ceph where I put two files to help you building your DevStack Ceph. $ git clone https://git.openstack.org/openstack-dev/devstack $ git clone …
Read more →OpenStack and Backup
Doing backups in the Cloud is not an easy task. In this article I will try to answer some frequently asked questions.
Read more →OpenStack summit Vancouver talks: Ceph and OpenStack upgrades
Self promotion ahead :) For the next OpenStack summit I have submitted two talks.
Read more →OpenStack: perform consistent snapshots with Qemu Guest Agent
A while back, I wrote an article about taking consistent snapshots of your virtual machines in your OpenStack environment. However this method was really intrusive since it required to be inside the …
Read more →OpenStack and Ceph: RBD discard
Only Magic Card player might recognize that post picture :) (if you’re interested) I have been waiting for this for quite a while now. Discard, also called trim (with SSD), is a space …
Read more →Ceph recover a RBD image from a dead cluster
Many years ago I came across a script made by Shawn Moore and Rodney Rymer from Catawba university. The purpose of this tool is to reconstruct a RBD image. Imagine your cluster dead, all the monitors …
Read more →Ceph and KRBD discard
Space reclamation mechanism for the Kernel RBD module. Having this kind of support is really crucial for operators and ease your capacity planing. RBD images are sparse, thus size after creation is …
Read more →OpenStack Cinder with Ceph under the hood
What’s happening under the hood while playing with Cinder and Ceph? Answer table :-).
Read more →OpenStack: disable a compute node during its first bootstrap
For operationnal reasons, you might not want to automatically make your compute node available. With the following flag, during its first bootstrap the compute node will register itself to the service …
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