def _get_libvirt_connection(driver_info):
"""Get the libvirt connection.
:param driver_info: driver info
:returns: the active libvirt connection
:raises: LibvirtError if failed to connect to the Libvirt uri.
"""
uri = driver_info['libvirt_uri']
sasl_username = driver_info.get('sasl_username')
sasl_password = driver_info.get('sasl_password')
ssh_key_filename = driver_info.get('ssh_key_filename')
try:
if sasl_username and sasl_password:
def request_cred(credentials, user_data):
for credential in credentials:
if credential[0] == libvirt.VIR_CRED_AUTHNAME:
credential[4] = sasl_username
elif credential[0] == libvirt.VIR_CRED_PASSPHRASE:
credential[4] = sasl_password
return 0
auth = [[libvirt.VIR_CRED_AUTHNAME, libvirt.VIR_CRED_PASSPHRASE],
request_cred, None]
conn = libvirt.openAuth(uri, auth, 0)
elif ssh_key_filename:
uri += "?keyfile=%s&no_verify=1" % ssh_key_filename
conn = libvirt.open(uri)
else:
conn = libvirt.open(uri)
except libvirt.libvirtError as e:
raise f_exc.LibvirtError(err=e)
if conn is None:
raise f_exc.LibvirtError(err=_("Failed to open connection to %s") %
uri)
return conn
def _get_power_state(domain):
"""Get the current power state of domain.
:param domain: libvirt domain object.
:returns: power state. One of :class:`ironic.common.states`.
:raises: LibvirtErr if failed to get doamin status.
"""
try:
if domain.isActive():
return states.POWER_ON
except libvirt.libvirtError as e:
raise f_exc.LibvirtError(err=e)
return states.POWER_OFF
def _power_cycle(domain):
"""Power cycles a node.
:param domain: libvirt domain object.
:raises: PowerStateFailure if it failed to set power state to POWER_ON.
:raises: LibvirtError if failed to power cycle domain.
"""
try:
_power_off(domain)
state = _power_on(domain)
except libvirt.libvirtError as e:
raise f_exc.LibvirtError(err=e)
if state != states.POWER_ON:
raise exception.PowerStateFailure(pstate=states.POWER_ON)
def _power_off(domain):
"""Power OFF this domain.
:param domain: libvirt domain object.
:returns: one of ironic.common.states POWER_OFF or ERROR.
:raises: LibvirtError if failed to destroy domain.
"""
current_pstate = _get_power_state(domain)
if current_pstate == states.POWER_OFF:
return current_pstate
try:
domain.destroy()
except libvirt.libvirtError as e:
raise f_exc.LibvirtError(err=e)
current_pstate = _get_power_state(domain)
if current_pstate == states.POWER_OFF:
return current_pstate
else:
return states.ERROR
def _power_on(domain):
"""Power ON this domain.
:param domain: libvirt domain object.
:returns: one of ironic.common.states POWER_ON or ERROR.
:raises: LibvirtError if failed to connect to start domain.
"""
current_pstate = _get_power_state(domain)
if current_pstate == states.POWER_ON:
return current_pstate
try:
domain.create()
except libvirt.libvirtError as e:
raise f_exc.LibvirtError(err=e)
current_pstate = _get_power_state(domain)
if current_pstate == states.POWER_ON:
return current_pstate
else:
return states.ERROR
def _set_boot_device(conn, domain, device):
"""Set the boot device.
:param conn: active libvirt connection.
:param domain: libvirt domain object.
:raises: LibvirtError if failed update domain xml.
"""
parsed = ET.fromstring(domain.XMLDesc())
os = parsed.find('os')
boot_list = os.findall('boot')
# Clear boot list
for boot_el in boot_list:
os.remove(boot_el)
boot_el = ET.SubElement(os, 'boot')
boot_el.set('dev', device)
try:
conn.defineXML(ET.tostring(parsed))
except libvirt.libvirtError as e:
raise f_exc.LibvirtError(err=e)