def storage_changed():
zone = get_zone(config('zone-assignment'))
node_settings = {
'ip': openstack.get_host_ip(relation_get('private-address')),
'zone': zone,
'account_port': relation_get('account_port'),
'object_port': relation_get('object_port'),
'container_port': relation_get('container_port'),
}
if None in node_settings.itervalues():
log('storage_changed: Relation not ready.')
return None
for k in ['zone', 'account_port', 'object_port', 'container_port']:
node_settings[k] = int(node_settings[k])
CONFIGS.write_all()
# allow for multiple devs per unit, passed along as a : separated list
devs = relation_get('device').split(':')
for dev in devs:
node_settings['device'] = dev
for ring in SWIFT_RINGS.itervalues():
if not exists_in_ring(ring, node_settings):
add_to_ring(ring, node_settings)
if should_balance([r for r in SWIFT_RINGS.itervalues()]):
balance_rings()
def balance_rings():
'''handle doing ring balancing and distribution.'''
new_ring = False
for ring in SWIFT_RINGS.itervalues():
if balance_ring(ring):
log('Balanced ring %s' % ring)
new_ring = True
if not new_ring:
return
for ring in SWIFT_RINGS.keys():
f = '%s.ring.gz' % ring
shutil.copyfile(os.path.join(SWIFT_CONF_DIR, f),
os.path.join(WWW_DIR, f))
if cluster.eligible_leader(SWIFT_HA_RES):
msg = 'Broadcasting notification to all storage nodes that new '\
'ring is ready for consumption.'
log(msg)
path = WWW_DIR.split('/var/www/')[1]
trigger = uuid.uuid4()
if cluster.is_clustered():
hostname = config('vip')
else:
hostname = unit_get('private-address')
rings_url = 'http://%s/%s' % (hostname, path)
# notify storage nodes that there is a new ring to fetch.
for relid in relation_ids('swift-storage'):
relation_set(relation_id=relid, swift_hash=get_swift_hash(),
rings_url=rings_url, trigger=trigger)
service_restart('swift-proxy')
