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This charm provides the Cinder volume service for OpenStack. It is intended to
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be used alongside the other OpenStack components, starting with the Folsom
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Cinder is made up of 3 separate services: an API service, a scheduler and a
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volume service. This charm allows them to be deployed in different
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combination, depending on user preference and requirements.
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This charm was developed to support deploying Folsom on both
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Ubuntu Quantal and Ubuntu Precise. Since Cinder is only available for
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Ubuntu 12.04 via the Ubuntu Cloud Archive, deploying this charm to a
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Precise machine will by default install Cinder and its dependencies from
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Cinder may be deployed in a number of ways. This charm focuses on 3 main
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configurations. All require the existence of the other core OpenStack
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services deployed via Juju charms, specifically: mysql, rabbitmq-server,
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keystone and nova-cloud-controller. The following assumes these services
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have already been deployed.
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Basic, all-in-one using local storage and iSCSI
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===============================================
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The api server, scheduler and volume service are all deployed into the same
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unit. Local storage will be initialized as a LVM phsyical device, and a volume
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group initialized. Instance volumes will be created locally as logical volumes
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and exported to instances via iSCSI. This is ideal for small-scale deployments
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juju deploy --config=cinder.cfg cinder
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juju add-relation cinder keystone
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juju add-relation cinder mysql
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juju add-relation cinder rabbitmq-server
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juju add-relation cinder nova-cloud-controller
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Separate volume units for scale out, using local storage and iSCSI
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==================================================================
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Separating the volume service from the API service allows the storage pool
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to easily scale without the added complexity that accompanies load-balancing
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the API server. When we've exhausted local storage on volume server, we can
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simply add-unit to expand our capacity. Future requests to allocate volumes
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will be distributed across the pool of volume servers according to the
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availability of storage space.
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enabled-services: api, scheduler
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enabled-services: volume
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juju deploy --config=cinder.cfg cinder cinder-api
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juju deploy --config=cinder.cfg cinder cinder-volume
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juju add-relation cinder-api mysql
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juju add-relation cinder-api rabbitmq-server
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juju add-relation cinder-api keystone
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juju add-relation cinder-api nova-cloud-controller
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juju add-relation cinder-volume mysql
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juju add-relation cinder-volume rabbitmq-server
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# When more storage is needed, simply add more volume servers.
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juju add-unit cinder-volume
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All-in-one using Ceph-backed RBD volumes
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========================================
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All 3 services can be deployed to the same unit, but instead of relying
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on local storage to back volumes an external Ceph cluster is used. This
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allows scalability and redundancy needs to be satisified and Cinder's RBD
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driver used to create, export and connect volumes to instances. This assumes
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a functioning Ceph cluster has already been deployed using the official Ceph
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charm and a relation exists between the Ceph service and the nova-compute
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juju deploy --config=cinder.cfg cinder
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juju add-relation cinder ceph
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juju add-relation cinder keystone
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juju add-relation cinder mysql
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juju add-relation cinder rabbitmq-server
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juju add-relation cinder nova-cloud-controller
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The default value for most config options should work for most deployments.
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Users should be aware of three options, in particular:
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openstack-origin: Allows Cinder to be installed from a specific apt repository.
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See config.yaml for a list of supported sources.
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block-device: When using local storage, a block device should be specified to
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back a LVM volume group. It's important this device exists on
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all nodes that the service may be deployed to.
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overwrite: Whether or not to wipe local storage that of data that may prevent
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it from being initialized as a LVM phsyical device. This includes
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filesystems and partition tables. *CAUTION*
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enabled-services: Can be used to separate cinder services between service
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service units (see previous section)
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Author: Adam Gandelman <adamg@canonical.com>
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Report bugs at: http://bugs.launchpad.net/charms
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Location: http://jujucharms.com
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README.md
