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Viewing changes to hooks/cinder_contexts.py

  • Committer: Adam Gandelman
  • Date: 2013-10-17 21:48:08 UTC
  • Revision ID: adamg@canonical.com-20131017214808-k52pya40bowxzg4i
Merging python-redux and havana work.

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hooks/cinder_contexts.py
 
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from charmhelpers.core.hookenv import (
 
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    config,
 
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    relation_ids,
 
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    service_name,
 
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)
 
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from charmhelpers.contrib.openstack.context import (
 
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    OSContextGenerator,
 
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    ApacheSSLContext as SSLContext,
 
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)
 
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from charmhelpers.contrib.hahelpers.cluster import (
 
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    determine_api_port,
 
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    determine_haproxy_port,
 
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)
 
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class ImageServiceContext(OSContextGenerator):
 
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    interfaces = ['image-service']
 
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    def __call__(self):
 
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        if not relation_ids('image-service'):
 
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            return {}
 
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        return { 'glance_api_version': config('glance-api-version') }
 
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class CephContext(OSContextGenerator):
 
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    interfaces = ['ceph']
 
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    def __call__(self):
 
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        """
 
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        Used to generate template context to be added to cinder.conf in the
 
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        presence of a ceph relation.
 
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        """
 
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        if not relation_ids('ceph'):
 
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            return {}
 
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        service = service_name()
 
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        return {
 
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            'volume_driver': 'cinder.volume.driver.RBDDriver',
 
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            # ensure_ceph_pool() creates pool based on service name.
 
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            'rbd_pool': service,
 
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            'rbd_user': service,
 
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            'host': service,
 
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        }
 
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class HAProxyContext(OSContextGenerator):
 
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    interfaces = ['ceph']
 
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    def __call__(self):
 
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        '''
 
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        Extends the main charmhelpers HAProxyContext with a port mapping
 
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        specific to this charm.
 
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        Also used to extend cinder.conf context with correct api_listening_port
 
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        '''
 
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        haproxy_port = determine_haproxy_port(config('api-listening-port'))
 
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        api_port = determine_api_port(config('api-listening-port'))
 
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        ctxt = {
 
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            'service_ports': {'cinder_api': [haproxy_port, api_port]},
 
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            'osapi_volume_listen_port': api_port,
 
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        }
 
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        return ctxt
 
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class ApacheSSLContext(SSLContext):
 
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    interfaces = ['https']
 
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    external_ports = [8776]
 
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    service_namespace = 'cinder'
 
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    def __call__(self):
 
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        # late import to work around circular dependency
 
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        from cinder_utils import service_enabled
 
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        if not service_enabled('cinder-api'):
 
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            return {}
 
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        return super(ApacheSSLContext, self).__call__()