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import os
import pwd
from base64 import b64decode
from copy import deepcopy
from subprocess import check_call
from charmhelpers.core.hookenv import (
config,
log,
related_units,
relation_ids,
relation_get,
ERROR,
)
from charmhelpers.contrib.openstack.utils import get_os_codename_package
from charmhelpers.contrib.openstack import templating, context
from nova_compute_context import (
CloudComputeContext,
NovaComputeLibvirtContext,
NovaComputeCephContext,
QuantumPluginContext,
)
CA_CERT_PATH = '/usr/local/share/ca-certificates/keystone_juju_ca_cert.crt'
TEMPLATES='templates/'
BASE_PACKAGES = [
'nova-compute',
'genisoimage', # was missing as a package dependency until raring.
]
BASE_RESOURCE_MAP = {
'/etc/libvirt/qemu.conf': {
'services': ['libvirt-bin'],
'contexts': [],
},
'/etc/default/libvirt-bin': {
'services': ['libvirt-bin'],
'contexts': [NovaComputeLibvirtContext()],
},
'/etc/nova/nova.conf': {
'services': ['nova-compute'],
'contexts': [context.AMQPContext(),
context.SharedDBContext(),
context.ImageServiceContext(),
CloudComputeContext(),
NovaComputeCephContext(),
QuantumPluginContext()]
},
}
CEPH_RESOURCES = {
'/etc/ceph/ceph.conf': {
'contexts': [NovaComputeCephContext()],
'services': [],
},
'/etc/ceph/secret.xml': {
'contexts': [NovaComputeCephContext()],
'services': [],
}
}
QUANTUM_RESOURCES = {
'/etc/quantum/quantum.conf': {
'services': ['quantum-server'],
'contexts': [context.AMQPContext()],
}
}
QUANTUM_PLUGINS = {
'ovs': {
'config': '/etc/quantum/plugins/openvswitch/ovs_quantum_plugin.ini',
'contexts': [context.SharedDBContext(),
QuantumPluginContext()],
'services': ['quantum-plugin-openvswitch-agent'],
'packages': ['quantum-plugin-openvswitch-agent',
'openvswitch-datapath-dkms'],
},
'nvp': {
'config': '/etc/quantum/plugins/nicira/nvp.ini',
'services': [],
'packages': ['quantum-plugin-nicira'],
}
}
# Maps virt-type config to a compute package(s).
VIRT_TYPES = {
'kvm': ['nova-compute-kvm'],
'qemu': ['nova-compute-qemu'],
'xen': ['nova-compute-xen'],
'uml': ['nova-compute-uml'],
'lxc': ['nova-compute-lxc'],
}
def resource_map():
'''
Dynamically generate a map of resources that will be managed for a single
hook execution.
'''
# TODO: Cache this on first call?
resource_map = deepcopy(BASE_RESOURCE_MAP)
net_manager = network_manager()
if (net_manager in ['FlatManager', 'FlatDHCPManager'] and
config('multi-host').lower() == 'yes'):
resource_map['/etc/nova/nova.conf']['services'].extend(
['nova-api', 'nova-network']
)
elif net_manager == 'Quantum':
plugin = quantum_plugin()
resource_map.update(QUANTUM_RESOURCES)
if plugin:
conf = quantum_attribute(plugin, 'config')
svcs = quantum_attribute(plugin, 'services')
ctxts = quantum_attribute(plugin, 'contexts') or []
resource_map[conf] = {}
resource_map[conf]['services'] = svcs
resource_map[conf]['contexts'] = ctxts
if relation_ids('ceph'):
resource_map.update(CEPH_RESOURCES)
return resource_map
def restart_map():
'''
Constructs a restart map based on charm config settings and relation
state.
'''
return {k: v['services'] for k, v in resource_map().iteritems()}
def register_configs():
'''
Returns an OSTemplateRenderer object with all required configs registered.
'''
_resource_map = resource_map()
if quantum_enabled():
_resource_map.update(QUANTUM_RESOURCES)
release = get_os_codename_package('nova-common', fatal=False) or 'essex'
configs = templating.OSConfigRenderer(templates_dir=TEMPLATES,
openstack_release=release)
for cfg, d in _resource_map.iteritems():
configs.register(cfg, d['contexts'])
return configs
def determine_packages():
packages = [] + BASE_PACKAGES
net_manager = network_manager()
if (net_manager in ['FlatManager', 'FlatDHCPManager'] and
config('multi-host').lower() == 'yes'):
packages.extend(['nova-api', 'nova-network'])
elif net_manager == 'Quantum':
plugin = quantum_plugin()
packages.extend(quantum_attribute(plugin, 'packages'))
if relation_ids('ceph'):
packages.append('ceph-common')
virt_type = config('virt-type')
try:
packages.extend(VIRT_TYPES[virt_type])
except KeyError:
log('Unsupported virt-type configured: %s' % virt_type)
raise
return packages
def migration_enabled():
# XXX: confirm juju-core bool behavior is the same.
return config('enable-live-migration')
def quantum_enabled():
manager = config('network-manager')
if not manager:
return False
return manager.lower() == 'quantum'
def _network_config():
'''
Obtain all relevant network configuration settings from nova-c-c via
cloud-compute interface.
'''
settings = ['network_manager', 'quantum_plugin']
net_config = {}
for rid in relation_ids('cloud-compute'):
for unit in related_units(rid):
for setting in settings:
value = relation_get(setting, rid=rid, unit=unit)
if value:
net_config[setting] = value
return net_config
def quantum_plugin():
return _network_config().get('quantum_plugin')
def network_manager():
return _network_config().get('network_manager')
def quantum_attribute(plugin, attr):
try:
_plugin = QUANTUM_PLUGINS[plugin]
except KeyError:
log('Unrecognised plugin for quantum: %s' % plugin, level=ERROR)
raise
try:
return _plugin[attr]
except KeyError:
return None
def public_ssh_key(user='root'):
home = pwd.getpwnam(user).pw_dir
try:
with open(os.path.join(home, '.ssh', 'id_rsa')) as key:
return key.read().strip()
except:
return None
def initialize_ssh_keys():
pass
def import_authorized_keys(user='root'):
"""Import SSH authorized_keys + known_hosts from a cloud-compute relation
and store in user's $HOME/.ssh.
"""
# XXX: Should this be managed via templates + contexts?
hosts = relation_get('known_hosts')
auth_keys = relation_get('authorized_keys')
if None in [hosts, auth_keys]:
return
dest = os.path.join(pwd.getpwnam(user).pw_dir, '.ssh')
log('Saving new known_hosts and authorized_keys file to: %s.' % dest)
with open(os.path.join(dest, 'authorized_keys')) as _keys:
_keys.write(b64decode(auth_keys))
with open(os.path.join(dest, 'known_hosts')) as _hosts:
_hosts.write(b64decode(hosts))
def configure_live_migration(configs=None):
"""
Ensure libvirt live migration is properly configured or disabled,
depending on current config setting.
"""
# dont think we need this
return
configs = configs or register_configs()
configs.write('/etc/libvirt/libvirtd.conf')
configs.write('/etc/default/libvirt-bin')
configs.write('/etc/nova/nova.conf')
if not migration_enabled():
return
if config('migration-auth-type') == 'ssh':
initialize_ssh_keys()
def do_openstack_upgrade():
pass
def import_keystone_ca_cert():
"""If provided, improt the Keystone CA cert that gets forwarded
to compute nodes via the cloud-compute interface
"""
ca_cert = relation_get('ca_cert')
if not ca_cert:
return
log('Writing Keystone CA certificate to %s' % CA_CERT_PATH)
with open(CA_CERT_PATH) as out:
out.write(b64decode(ca_cert))
check_call(['update-ca-certificates'])
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