open source

Safely backing up your Ceph monitors

Safely backing up your Ceph monitors 1562 1001 Wido den Hollander

So you might wonder: Why do I need to make a backup of my Ceph monitors? I have multiple monitors. That’s true, but would you run into the very unfortunate situation where you loose all you monitors, you loose all your data. The monitors contain very important metadata (pgmap, osdmap, crushmap) to run your cluster.…

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Changing the region of a RGW bucket

Changing the region of a RGW bucket 1500 1000 Wido den Hollander

As of Ceph version 0.67 (Dumpling) the Ceph Object Gateway aka RADOS Gateway supports regions. This allows you to create a geo-replicated Amazon S3 compatible service. While working on a setup we decided later in the process that we wanted regions, but we already created about 50 buckets with data in them. We didn’t feel…

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A quick note on running CloudStack with RBD on Ubuntu 12.04

A quick note on running CloudStack with RBD on Ubuntu 12.04 1510 1000 Wido den Hollander

When you want to use Ceph as Primary Storage in Apache CloudStack you need a recent version of libvirt with RBD storage pool support enabled. If you want to use Ubuntu 12.04 LTS (Precise) you would need to manually compile libvirt since the default libvirt version doesn’t include RBD storage pool support. But not any…

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Redundant Ceph monitors with Round Robin DNS

Redundant Ceph monitors with Round Robin DNS 1500 1001 Wido den Hollander

One of the unique features of Ceph is that it can be build without any Single Point of Failure. No single machine will take your cluster down when designed properly. Ceph’s monitors play a crucial part in this. To make them redundant you want a odd number of monitors, where 3 is more then sufficient…

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Enhanced RBD support for CloudStack 4.2

Enhanced RBD support for CloudStack 4.2 1500 1000 Wido den Hollander

About 1 hour ago the new storage subsystem got merged into the master branch of CloudStack. That is wonderful news for all you out there who want to use features like snapshotting with RBD in CloudStack. In pre-4.2 CloudStack a snapshot was the same as a backup. As soon as you created a snapshot it…

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Ceph distributed storage with CloudStack

Ceph distributed storage with CloudStack 1618 1001 Wido den Hollander

As we are nearing the CloudStack 4.0 release I figured it was time I’d write something about the Ceph integration in CloudStack 4.0 In the beginning of this year we (my company) decided we wanted to use CloudStack for our cloud product, but we also wanted to use Ceph for the storage. CloudStack lacked the…

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