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55 lines
1.7 KiB
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55 lines
1.7 KiB
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===========================
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RBD and Apache CloudStack
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===========================
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You can use RBD to run instances on in Apache CloudStack.
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This can be done by adding a RBD pool as Primary Storage.
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There are a couple of prerequisites:
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* You need to CloudStack 4.0 or higher
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* Qemu on the Hypervisor has to be compiled with RBD enabled
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* The libvirt version on the Hypervisor has to be at least 0.10 with RBD enabled
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Make sure you meet this requirements before installing the CloudStack Agent on the Hypervisor(s)!
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.. important:: To use RBD with CloudStack, you must have a running Ceph cluster!
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Limitations
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===========
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Running instances from RBD has a couple of limitations:
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* An additional NFS Primary Storage pool is required for running System VM's
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* Snapshotting RBD volumes is not possible (at this moment)
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* Only one monitor can be configured
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Add Hypervisor
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==============
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Please follow the official CloudStack documentation how to do this.
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There is no special way of adding a Hypervisor when using RBD, nor is any configuration needed on the hypervisor.
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Add RBD Primary Storage
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=======================
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Once the hypervisor has been added, log on to the CloudStack UI.
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* Infrastructure
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* Primary Storage
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* "Add Primary Storage"
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* Select "Protocol" RBD
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* Fill in your cluster information (cephx is supported)
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* Optionally add the tag 'rbd'
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Now you should be able to deploy instances on RBD.
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RBD Disk Offering
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=================
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Create a special "Disk Offering" which needs to match the tag 'rbd' so you can make sure the StoragePoolAllocator
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chooses the RBD pool when searching for a suiteable storage pool.
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Since there is also a NFS storage pool it's possible that instances get deployed on NFS instead of RBD.
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