def call(self, context, version, method, *args, **kwargs):
"""Call a glance client method. If we get a connection error,
retry the request according to CONF.glance_num_retries.
"""
retry_excs = (glanceclient.exc.ServiceUnavailable,
glanceclient.exc.InvalidEndpoint,
glanceclient.exc.CommunicationError)
num_attempts = 1 + CONF.glance_num_retries
for attempt in xrange(1, num_attempts + 1):
client = self.client or self._create_onetime_client(
context, version)
try:
return getattr(client.images, method)(*args, **kwargs)
except retry_excs as e:
host = self.host
port = self.port
extra = "retrying"
error_msg = (_("Error contacting glance server "
"'%(host)s:%(port)s' for '%(method)s', "
"%(extra)s.") % {
'host': host,
'port': port,
'method': method,
'extra': extra
})
if attempt == num_attempts:
extra = 'done trying'
LOG.exception(error_msg)
raise exception.GlanceConnectionFailed(host=host,
port=port,
reason=str(e))
LOG.exception(error_msg)
time.sleep(1)
def call(self, context, version, method, *args, **kwargs):
"""Call a glance client method. If we get a connection error,
retry the request according to CONF.glance.num_retries.
"""
retry_excs = (glanceclient.exc.ServiceUnavailable,
glanceclient.exc.InvalidEndpoint,
glanceclient.exc.CommunicationError)
retries = CONF.glance.num_retries
if retries < 0:
LOG.warning(_LW("Treating negative config value (%(retries)s) for "
"'glance.num_retries' as 0."),
{'retries': retries})
retries = 0
num_attempts = retries + 1
for attempt in range(1, num_attempts + 1):
client = self.client or self._create_onetime_client(context,
version)
try:
return getattr(client.images, method)(*args, **kwargs)
except retry_excs as e:
if attempt < num_attempts:
extra = "retrying"
else:
extra = 'done trying'
LOG.exception(_LE("Error contacting glance server "
"'%(server)s' for '%(method)s', "
"%(extra)s."),
{'server': self.api_server,
'method': method, 'extra': extra})
if attempt == num_attempts:
raise exception.GlanceConnectionFailed(
server=str(self.api_server), reason=six.text_type(e))
time.sleep(1)
def call(self,
context,
version,
method,
controller=None,
args=None,
kwargs=None):
"""Call a glance client method. If we get a connection error,
retry the request according to CONF.glance.num_retries.
:param context: RequestContext to use
:param version: Numeric version of the *Glance API* to use
:param method: string method name to execute on the glanceclient
:param controller: optional string name of the client controller to
use. Default (None) is to use the 'images'
controller
:param args: optional iterable of arguments to pass to the
glanceclient method, splatted as positional args
:param kwargs: optional dict of arguments to pass to the glanceclient,
splatted into named arguments
"""
args = args or []
kwargs = kwargs or {}
retry_excs = (glanceclient.exc.ServiceUnavailable,
glanceclient.exc.InvalidEndpoint,
glanceclient.exc.CommunicationError)
num_attempts = 1 + CONF.glance.num_retries
controller_name = controller or 'images'
for attempt in range(1, num_attempts + 1):
client = self.client or self._create_onetime_client(
context, version)
try:
controller = getattr(client, controller_name)
result = getattr(controller, method)(*args, **kwargs)
if inspect.isgenerator(result):
# Convert generator results to a list, so that we can
# catch any potential exceptions now and retry the call.
return list(result)
return result
except retry_excs as e:
if attempt < num_attempts:
extra = "retrying"
else:
extra = 'done trying'
LOG.exception(
"Error contacting glance server "
"'%(server)s' for '%(method)s', "
"%(extra)s.", {
'server': self.api_server,
'method': method,
'extra': extra
})
if attempt == num_attempts:
raise exception.GlanceConnectionFailed(
server=str(self.api_server), reason=six.text_type(e))
time.sleep(1)
def _call_retry(self, context, name, *args, **kwargs):
"""Retry call to glance server if there is a connection error.
Suitable only for idempotent calls."""
for i in xrange(FLAGS.glance_num_retries + 1):
client = self._get_client(context)
try:
return getattr(client, name)(*args, **kwargs)
except glance_exception.ClientConnectionError as e:
LOG.exception(_('Connection error contacting glance'
' server, retrying'))
time.sleep(1)
raise exception.GlanceConnectionFailed(
reason=_('Maximum attempts reached'))
def call(self, context, version, method, *args, **kwargs):
"""Call a glance client method. If we get a connection error,
retry the request according to CONF.glance.num_retries.
"""
retry_excs = (glanceclient.exc.ServiceUnavailable,
glanceclient.exc.InvalidEndpoint,
glanceclient.exc.CommunicationError)
retries = CONF.glance.num_retries
if retries < 0:
LOG.warning(
_LW("Treating negative config value (%(retries)s) for "
"'glance.num_retries' as 0."), {'retries': retries})
retries = 0
num_attempts = retries + 1
for attempt in range(1, num_attempts + 1):
client = self.client or self._create_onetime_client(
context, version)
try:
result = getattr(client.images, method)(*args, **kwargs)
if inspect.isgenerator(result):
# Convert generator results to a list, so that we can
# catch any potential exceptions now and retry the call.
return list(result)
return result
except retry_excs as e:
host = self.host
port = self.port
if attempt < num_attempts:
extra = "retrying"
else:
extra = 'done trying'
LOG.exception(
_LE("Error contacting glance server "
"'%(host)s:%(port)s' for '%(method)s', "
"%(extra)s."), {
'host': host,
'port': port,
'method': method,
'extra': extra
})
if attempt == num_attempts:
raise exception.GlanceConnectionFailed(
host=host, port=port, reason=six.text_type(e))
time.sleep(1)
def call(self, context, version, method, *args, **kwargs):
"""Call a glance client method. If we get a connection error,
retry the request according to CONF.glance.num_retries.
"""
retry_excs = (glanceclient.exc.ServiceUnavailable,
glanceclient.exc.InvalidEndpoint,
glanceclient.exc.CommunicationError)
num_attempts = 1 + CONF.glance.num_retries
for attempt in range(1, num_attempts + 1):
client = self.client or self._create_onetime_client(
context, version)
try:
controller = getattr(client,
kwargs.pop('controller', 'images'))
result = getattr(controller, method)(*args, **kwargs)
if inspect.isgenerator(result):
# Convert generator results to a list, so that we can
# catch any potential exceptions now and retry the call.
return list(result)
return result
except retry_excs as e:
if attempt < num_attempts:
extra = "retrying"
else:
extra = 'done trying'
LOG.exception(
"Error contacting glance server "
"'%(server)s' for '%(method)s', "
"%(extra)s.", {
'server': self.api_server,
'method': method,
'extra': extra
})
if attempt == num_attempts:
raise exception.GlanceConnectionFailed(
server=str(self.api_server), reason=six.text_type(e))
time.sleep(1)
