Configure Ceph RBD caching on OpenStack Nova
By default, OpenStack doesn’t use any caching. However, you might want to enable the RBD caching.
Best localrc for DevStack
I simply collected all my localrc files and combined them into a single one. Feel free to grab the parts that interest you.
DevStack in 1 minute
DevStack in 1 minute! Ready, steady, GO!
Ceph: update Cephx Keys
It’s not really clear from the command line
Some horizon enhancements
The road to Havana is long, no milestone in the corner yet, but already some enhancements have been brought to the Horizon interface. Let’s take a quick look at the new fancy stuff!
Ceph integration in OpenStack: Grizzly update and roadmap for Havana
What a perfect picture, a Cephalopod smoking a cigar! Updates! The OpenStack developer summit was great and obviously one of the most exciting session was the one about the Ceph integration with OpenStack. I had the great pleasure to attend this session (led by Josh Durgin from Inktank). The session was too short, but we had enough time to discuss upcoming features and establish a proper roadmap. With the help of this article, I’d like to share some of the discussions that we had and blueprints that we wrote.
Grizzly Nova: what's new in the API CLI?
Quick Nova API CLI updates.
Nova: archive deleted rows
Archiving deleted rows made easy by Grizzly.
Deploy a Ceph MDS server
How-to quickly deploy a MDS server.
Use existing RBD image and put it into Glance
The title of the article is not that explicit, actually I had trouble to find a proper one. Thus let me clarify a bit. Here is the context I was wondering if Glance was capable of converting images within its store. The quick answer is no, but I think such feature is worth to be implemented. Glance could be able to convert a QCOW2 image to a RAW format. Usually if you already have an image within let’s say a Ceph cluster (RBD), you have to download the image (since you probably don’t have the source image file anymore), then manually convert it with qemu-img (QCOW2 –> RAW) and eventually import it into Glance. Enough talk about this, I’ll address this in a future article. For now let’s stick to the first matter. Imagine that you have a KVM cluster backed by a Ceph Cluster and your CTO wants you to migrate the whole environment to OpenStack because it’s trendy (joking, OpenStack just rocks!). You’re not going to backup all your images and then build a new cluster or something like that, you might want OpenStack (Glance) to be aware of your Ceph cluster. Generally speaking you just have to connect Glance to one of your image pool. After this, the only thing to do is to create (it’s more registering the images ID and metadata than creating a new image) into Glance. No worries here’s the explanation. Longest introduction ever.