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from charmhelpers.contrib.openstack import context
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from charmhelpers.core.host import service_running, service_start
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from charmhelpers.fetch import apt_install, filter_installed_packages
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from charmhelpers.core.hookenv import (
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from charmhelpers.contrib.openstack.utils import get_host_ip, os_release
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from charmhelpers.contrib.network.ovs import add_bridge
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# This is just a label and it must be consistent across
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# nova-compute nodes to support live migration.
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CEPH_SECRET_UUID = '514c9fca-8cbe-11e2-9c52-3bc8c7819472'
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def _save_flag_file(path, data):
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Saves local state about plugin or manager to specified file.
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# Wonder if we can move away from this now?
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with open(path, 'wb') as out:
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# compatability functions to help with quantum -> neutron transition
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def _network_manager():
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from nova_compute_utils import network_manager as manager
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def _neutron_security_groups():
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Inspects current cloud-compute relation and determine if nova-c-c has
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instructed us to use neutron security groups.
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for rid in relation_ids('cloud-compute'):
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for unit in related_units(rid):
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relation_get('neutron_security_groups',
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relation_get('quantum_security_groups',
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if ('yes' in groups or 'Yes' in groups):
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def _neutron_plugin():
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from nova_compute_utils import neutron_plugin
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return neutron_plugin()
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def _neutron_url(rid, unit):
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# supports legacy relation settings.
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return (relation_get('neutron_url', rid=rid, unit=unit) or
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relation_get('quantum_url', rid=rid, unit=unit))
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class NovaComputeLibvirtContext(context.OSContextGenerator):
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Determines various libvirt and nova options depending on live migration
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# /etc/default/libvirt-bin
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'libvirtd_opts': '-d',
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# /etc/libvirt/libvirtd.conf (
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# enable tcp listening if configured for live migration.
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if config('enable-live-migration'):
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ctxt['libvirtd_opts'] += ' -l'
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if config('migration-auth-type') in ['none', 'None', 'ssh']:
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ctxt['listen_tls'] = 0
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if config('migration-auth-type') == 'ssh':
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ctxt['live_migration_uri'] = 'qemu+ssh://%s/system'
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class NovaComputeVirtContext(context.OSContextGenerator):
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class NovaComputeCephContext(context.CephContext):
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ctxt = super(NovaComputeCephContext, self).__call__()
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ctxt['ceph_secret_uuid'] = CEPH_SECRET_UUID
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ctxt['service_name'] = svc
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ctxt['rbd_user'] = svc
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ctxt['rbd_secret_uuid'] = CEPH_SECRET_UUID
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ctxt['rbd_pool'] = 'nova'
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class CloudComputeContext(context.OSContextGenerator):
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Generates main context for writing nova.conf and quantum.conf templates
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from a cloud-compute relation changed hook. Mainly used for determinig
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correct network and volume service configuration on the compute node,
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as advertised by the cloud-controller.
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Note: individual quantum plugin contexts are handled elsewhere.
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interfaces = ['cloud-compute']
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def _ensure_packages(self, packages):
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'''Install but do not upgrade required packages'''
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required = filter_installed_packages(packages)
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apt_install(required, fatal=True)
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def network_manager(self):
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return _network_manager()
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def volume_service(self):
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volume_service = None
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for rid in relation_ids('cloud-compute'):
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for unit in related_units(rid):
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volume_service = relation_get('volume_service',
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return volume_service
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def flat_dhcp_context(self):
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for rid in relation_ids('cloud-compute'):
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for unit in related_units(rid):
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ec2_host = relation_get('ec2_host', rid=rid, unit=unit)
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if config('multi-host').lower() == 'yes':
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self._ensure_packages(['nova-api', 'nova-network'])
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'flat_interface': config('flat-interface'),
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'ec2_dmz_host': ec2_host,
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def neutron_context(self):
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# generate config context for neutron or quantum. these get converted
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# directly into flags in nova.conf
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# NOTE: Its up to release templates to set correct driver
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def _legacy_quantum(ctxt):
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# rename neutron flags to support legacy quantum.
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for k, v in ctxt.iteritems():
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k = k.replace('neutron', 'quantum')
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neutron_ctxt = {'neutron_url': None}
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for rid in relation_ids('cloud-compute'):
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for unit in related_units(rid):
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rel = {'rid': rid, 'unit': unit}
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url = _neutron_url(**rel)
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# only bother with units that have a neutron url set.
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'neutron_auth_strategy': 'keystone',
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'keystone_host': relation_get(
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'auth_port': relation_get(
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'neutron_admin_tenant_name': relation_get(
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'service_tenant_name', **rel),
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'neutron_admin_username': relation_get(
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'service_username', **rel),
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'neutron_admin_password': relation_get(
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'service_password', **rel),
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'neutron_plugin': _neutron_plugin(),
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missing = [k for k, v in neutron_ctxt.iteritems() if v in ['', None]]
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log('Missing required relation settings for Quantum: ' +
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neutron_ctxt['neutron_security_groups'] = _neutron_security_groups()
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ks_url = 'http://%s:%s/v2.0' % (neutron_ctxt['keystone_host'],
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neutron_ctxt['auth_port'])
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neutron_ctxt['neutron_admin_auth_url'] = ks_url
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if self.network_manager == 'quantum':
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return _legacy_quantum(neutron_ctxt)
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def volume_context(self):
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# provide basic validation that the volume manager is supported on the
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# given openstack release (nova-volume is only supported for E and F)
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# it is up to release templates to set the correct volume driver.
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if not self.volume_service:
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os_rel = os_release('nova-common')
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# ensure volume service is supported on specific openstack release.
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if self.volume_service == 'cinder':
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if os_rel == 'essex':
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e = ('Attempting to configure cinder volume manager on '
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'an unsupported OpenStack release (essex)')
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raise context.OSContextError(e)
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elif self.volume_service == 'nova-volume':
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if os_release('nova-common') not in ['essex', 'folsom']:
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e = ('Attempting to configure nova-volume manager on '
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'an unsupported OpenStack release (%s).' % os_rel)
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raise context.OSContextError(e)
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e = ('Invalid volume service received via cloud-compute: %s' %
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raise context.OSContextError(e)
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def network_manager_context(self):
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if self.network_manager == 'flatdhcpmanager':
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ctxt = self.flat_dhcp_context()
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elif self.network_manager in ['neutron', 'quantum']:
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ctxt = self.neutron_context()
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_save_flag_file(path='/etc/nova/nm.conf', data=self.network_manager)
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log('Generated config context for %s network manager.' %
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self.network_manager)
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rids = relation_ids('cloud-compute')
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net_manager = self.network_manager_context()
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ctxt['network_manager'] = self.network_manager
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ctxt['network_manager_config'] = net_manager
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vol_service = self.volume_context()
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ctxt['volume_service'] = vol_service
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class NeutronComputeContext(context.NeutronContext):
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return _neutron_plugin()
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def network_manager(self):
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return _network_manager()
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def neutron_security_groups(self):
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return _neutron_security_groups()
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def _ensure_bridge(self):
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if not service_running('openvswitch-switch'):
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service_start('openvswitch-switch')
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add_bridge(OVS_BRIDGE)
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# In addition to generating config context, ensure the OVS service
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# is running and the OVS bridge exists. Also need to ensure
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# local_ip points to actual IP, not hostname.
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ovs_ctxt = super(NeutronComputeContext, self).ovs_ctxt()
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self._ensure_bridge()
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ovs_ctxt['local_ip'] = get_host_ip(unit_get('private-address'))
added
removed
hooks/nova_compute_context.py
