def on_entry(self):
req = self.db.requests.get_info(self.machine.request_id)
device_name = req['assigned_device']
device_state = self.db.devices.get_machine_state(device_name)
if device_state != 'ready':
self.logger.error('Assigned device %s is in unexpected state %s '
'when about to contact lifeguard.' %
(device_name, device_state))
self.machine.goto_state(finding_device)
# note that there's still a small chance of a race here between
# mozpool and lifeguard: lifeguard begins self-testing the device
# after this check and before it receives the event below; the
# device eventually returns to the 'ready' state, but has not sent
# the request. The timeout for 'pending' will catch this rare
# situation.
return
# If the requested image is reusable and we got a device with that
# image and the requested bootconfig, just power cycle it.
# Otherwise, image it. Note that there will be a failure if the
# image is not installed and the device is not imageable.
event = ''
device_request_data = {}
assigned_device_name = req['assigned_device']
if self.db.images.is_reusable(req['image']):
dev = self.db.devices.get_image(req['assigned_device'])
if (dev['image'] == req['image'] and util.from_json(
dev['boot_config']) == util.from_json(req['boot_config'])):
event = 'please_power_cycle'
if not event:
# Use the device's hardware type and requested image to find the
# pxe config, if any.
event = 'please_image'
device_request_data['boot_config'] = req['boot_config']
device_request_data['image'] = req['image']
# try to ask lifeguard to start imaging or power cycling
device_url = 'http://%s/api/device/%s/event/%s/' % (
self.db.devices.get_imaging_server(assigned_device_name),
assigned_device_name, event)
def posted(result):
if result.status_code != 200:
self.logger.warn("got %d from Lifeguard" % result.status_code)
return
mozpool.driver.handle_event(self.machine.request_id,
'lifeguard_contacted', {})
async .requests.post.start(posted,
device_url,
data=json.dumps(device_request_data))
def on_entry(self):
req = self.db.requests.get_info(self.machine.request_id)
device_name = req['assigned_device']
device_state = self.db.devices.get_machine_state(device_name)
if device_state != 'ready':
self.logger.error('Assigned device %s is in unexpected state %s '
'when about to contact lifeguard.' %
(device_name, device_state))
self.machine.goto_state(finding_device)
# note that there's still a small chance of a race here between
# mozpool and lifeguard: lifeguard begins self-testing the device
# after this check and before it receives the event below; the
# device eventually returns to the 'ready' state, but has not sent
# the request. The timeout for 'pending' will catch this rare
# situation.
return
# If the requested image is reusable and we got a device with that
# image and the requested bootconfig, just power cycle it.
# Otherwise, image it. Note that there will be a failure if the
# image is not installed and the device is not imageable.
event = ''
device_request_data = {}
assigned_device_name = req['assigned_device']
if self.db.images.is_reusable(req['image']):
dev = self.db.devices.get_image(req['assigned_device'])
if (dev['image'] == req['image'] and
util.from_json(dev['boot_config']) ==
util.from_json(req['boot_config'])):
event = 'please_power_cycle'
if not event:
# Use the device's hardware type and requested image to find the
# pxe config, if any.
event = 'please_image'
device_request_data['boot_config'] = req['boot_config']
device_request_data['image'] = req['image']
# try to ask lifeguard to start imaging or power cycling
device_url = 'http://%s/api/device/%s/event/%s/' % (
self.db.devices.get_imaging_server(assigned_device_name),
assigned_device_name, event)
def posted(result):
if result.status_code != 200:
self.logger.warn("got %d from Lifeguard" % result.status_code)
return
mozpool.driver.handle_event(self.machine.request_id, 'lifeguard_contacted', {})
async.requests.post.start(posted, device_url,
data=json.dumps(device_request_data))
def find_device(self):
self.logger.info('Finding device.')
device_name = None
count = self.machine.increment_counter(self.state_name)
self.db.device_requests.clear(self.machine.request_id)
request = self.db.requests.get_info(self.machine.request_id)
image_is_reusable = self.db.images.is_reusable(request['image'])
avail_devices = self.db.devices.list_available(
environment=request['environment'],
device_name=request['requested_device'])
if avail_devices:
if image_is_reusable:
devices_with_image = [
x for x in avail_devices if x['image'] == request['image']
and util.from_json(x['boot_config']) == util.from_json(
request['boot_config'])
]
if devices_with_image:
avail_devices = devices_with_image
# pick a device at random from the returned list
device_name = random.choice(avail_devices)['name']
self.logger.info('Assigning device %s.' % device_name)
if self.db.device_requests.add(self.machine.request_id,
device_name):
self.logger.info('Request succeeded.')
self.machine.goto_state(contact_lifeguard)
else:
self.logger.warn('Request failed!')
if request['requested_device'] == 'any':
if count >= self.MAX_ANY_REQUESTS:
self.logger.warn('Hit maximum number of attempts to find '
'a free device; giving up.')
self.machine.goto_state(failed_device_not_found)
else:
if count >= self.MAX_SPECIFIC_REQUESTS:
self.logger.warn('Requested device %s is busy.' %
request['requested_device'])
self.machine.goto_state(failed_device_busy)
return
# check the device status - if it's failed, then short-circuit
# to failed_bad_device
state = self.db.devices.get_machine_state(
request['requested_device'])
if state.startswith('failed_'):
self.machine.goto_state(failed_bad_device)
def find_device(self):
self.logger.info('Finding device.')
device_name = None
count = self.machine.increment_counter(self.state_name)
self.db.device_requests.clear(self.machine.request_id)
request = self.db.requests.get_info(self.machine.request_id)
image_is_reusable = self.db.images.is_reusable(request['image'])
avail_devices = self.db.devices.list_available(
environment=request['environment'],
device_name=request['requested_device'])
if avail_devices:
if image_is_reusable:
devices_with_image = [x for x in avail_devices
if x['image'] == request['image'] and
util.from_json(x['boot_config']) ==
util.from_json(request['boot_config'])]
if devices_with_image:
avail_devices = devices_with_image
# pick a device at random from the returned list
device_name = random.choice(avail_devices)['name']
self.logger.info('Assigning device %s.' % device_name)
if self.db.device_requests.add(self.machine.request_id,
device_name):
self.logger.info('Request succeeded.')
self.machine.goto_state(contacting_lifeguard)
else:
self.logger.warn('Request failed!')
if request['requested_device'] == 'any':
if count >= self.MAX_ANY_REQUESTS:
self.logger.warn('Hit maximum number of attempts to find '
'a free device; giving up.')
self.machine.goto_state(failed_device_not_found)
else:
if count >= self.MAX_SPECIFIC_REQUESTS:
self.logger.warn('Requested device %s is busy.' %
request['requested_device'])
self.machine.goto_state(failed_device_busy)
return
# check the device status - if it's failed, then short-circuit
# to failed_bad_device
state = self.db.devices.get_machine_state(request['requested_device'])
if state.startswith('failed_'):
self.machine.goto_state(failed_bad_device)
def test_from_json(self):
self.assertEqual(util.from_json('{"a": "b"}'), {'a': 'b'})
self.assertEqual(util.from_json('{"a"'), {})