juju deploy openstack-charmers-next-cinder
|latest/edge||698||698||19 Mar 2021|
OpenStack block storage service Read more
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The cinder charm deploys Cinder, the Block Storage (volume) service for OpenStack. The charm works alongside other Juju-deployed OpenStack services.
This section covers common and/or important configuration options. See file
config.yaml for the full list of options, along with their descriptions and
default values. See the Juju documentation for details
on configuring applications.
Important: The practice of setting the
block-deviceoption to a local block device is deprecated. Doing so enacts the charm's built-in support for LVM storage. This feature will soon be removed from the charm, along with the option's default value of 'sdb'.
States the software sources. A common value is an OpenStack UCA release (e.g. 'cloud:bionic-ussuri' or 'cloud:focal-wallaby'). See Ubuntu Cloud Archive. The underlying host's existing apt sources will be used if this option is not specified (this behaviour can be explicitly chosen by using the value of 'distro').
This section includes two different deployment scenarios, each of which requires these applications to be present: keystone, nova-cloud-controller, nova-compute, rabbitmq-server, and a cloud database.
The database application is determined by the series. Prior to focal percona-cluster is used, otherwise it is mysql-innodb-cluster. In the example deployment below mysql-innodb-cluster has been chosen.
Cinder can be backed by Ceph, which provides volumes with scalability and redundancy.
Note: Ceph is the recommended storage method for production Cinder deployments.
These instructions assume a pre-existing Ceph cluster.
cinder.yaml contains the following:
cinder: block-device: None
block-device must be set to 'None' to disable the local block device.
Here, Cinder is deployed to a container on machine '1' and related to the Ceph cluster via the cinder-ceph subordinate charm:
juju deploy --to lxd:1 --config cinder.yaml cinder juju deploy cinder-ceph juju add-relation cinder-ceph:storage-backend cinder:storage-backend juju add-relation cinder-ceph:ceph ceph-mon:client juju add-relation cinder-ceph:ceph-access nova-compute:ceph-access
Proceed with a group of commands common to both scenarios:
juju add-relation cinder:identity-service keystone:identity-service juju add-relation cinder:cinder-volume-service nova-cloud-controller:cinder-volume-service juju add-relation cinder:amqp rabbitmq-server:amqp juju deploy mysql-router cinder-mysql-router juju add-relation cinder-mysql-router:db-router mysql-innodb-cluster:db-router juju add-relation cinder-mysql-router:shared-db cinder:shared-db
Cinder can be backed by storage local to the cinder unit, where local block devices are used as LVM physical volumes, and volumes are offered via iSCSI. This functionality is provided by the cinder-lvm subordinate charm.
Note: Built-in support for LVM in the cinder charm is deprecated.
Cinder can be backed by a NetApp appliance local to the cinder unit, where volumes are offered via iSCSI or NFS. This functionality is provided by the cinder-netapp subordinate charm.
When more than one unit is deployed with the hacluster application the charm will bring up an HA active/active cluster.
There are two mutually exclusive high availability options: using virtual IP(s) or DNS. In both cases the hacluster subordinate charm is used to provide the Corosync and Pacemaker backend HA functionality.
This charm supports the use of Juju network spaces (Juju
v.2.0). This feature optionally allows specific types of the application's
network traffic to be bound to subnets that the underlying hardware is
Note: Spaces must be configured in the backing cloud prior to deployment.
API endpoints can be bound to distinct network spaces supporting the network separation of public, internal, and admin endpoints.
Access to the underlying MySQL instance can also be bound to a specific space using the shared-db relation.
For example, providing that spaces 'public-space', 'internal-space', and 'admin-space' exist, the deploy command above could look like this:
juju deploy --config cinder.yaml cinder \ --bind "public=public-space internal=internal-space admin=admin-space shared-db=internal-space"
Alternatively, configuration can be provided as part of a bundle:
cinder: charm: cs:cinder num_units: 1 bindings: public: public-space internal: internal-space admin: admin-space shared-db: internal-space
Note: Existing cinder units configured with the
os-public-networkoptions will continue to honour them. Furthermore, these options override any space bindings, if set.
This section covers Juju actions supported by the charm.
Actions allow specific operations to be performed on a per-unit basis. To
display action descriptions run
juju actions --schema cinder. If the charm is
not deployed then see file
Policy overrides is an advanced feature that allows an operator to override the default policy of an OpenStack service. The policies that the service supports, the defaults it implements in its code, and the defaults that a charm may include should all be clearly understood before proceeding.
Caution: It is possible to break the system (for tenants and other services) if policies are incorrectly applied to the service.
Policy statements are placed in a YAML file. This file (or files) is then (ZIP) compressed into a single file and used as an application resource. The override is then enabled via a Boolean charm option.
Here are the essential commands (filenames are arbitrary):
zip overrides.zip override-file.yaml juju attach-resource cinder policyd-override=overrides.zip juju config cinder use-policyd-override=true
The OpenStack Charms project maintains two documentation guides:
- OpenStack Charm Guide: for project information, including development and support notes
- OpenStack Charms Deployment Guide: for charm usage information
Please report bugs on Launchpad.