def _Delete(self):
"""Delete a DigitalOcean VM instance."""
stdout, ret = util.RunCurlCommand('DELETE',
'droplets/%s' % self.droplet_id)
if ret != 0:
if ret == 404:
return # Assume already deleted.
raise errors.Resource.RetryableDeletionError(
'Deletion failed: %s' % GetErrorMessage(stdout))
# Get the droplet's actions so that we can look up the
# ID for the deletion just issued.
stdout, ret = util.RunCurlCommand(
'GET', 'droplets/%s/actions' % self.droplet_id)
if ret != 0:
# There's a race condition here - if the lookup fails, assume it's
# due to deletion already being complete. Don't raise an error in
# that case, the _Exists check should trigger retry if needed.
return
response = json.loads(stdout)['actions']
# Get the action ID for the 'destroy' action. This assumes there's only
# one of them, but AFAIK there can't be more since 'destroy' locks the VM.
destroy = [v for v in response if v['type'] == 'destroy'][0]
# Wait for completion. Actions are global objects, so the action
# status should still be retrievable after the VM got destroyed.
# We don't care about the result, let the _Exists check decide if we
# need to try again.
self._GetActionResult(destroy['id'])
def _PostCreate(self):
"""Get the instance's data."""
stdout, _ = util.RunCurlCommand('GET', 'droplets/%s' % self.droplet_id)
response = json.loads(stdout)['droplet']
for interface in response['networks']['v4']:
if interface['type'] == 'public':
self.ip_address = interface['ip_address']
else:
self.internal_ip = interface['ip_address']
def _Exists(self):
"""Returns true if the VM exists."""
_, ret = util.RunCurlCommand('GET',
'droplets/%s' % self.droplet_id,
suppress_warning=True)
if ret == 0:
return True
if ret == 404:
# Definitely doesn't exist.
return False
# Unknown status - assume it doesn't exist. TODO(klausw): retry?
return False
def _Create(self):
"""Create a DigitalOcean VM instance (droplet)."""
with open(self.ssh_public_key) as f:
public_key = f.read().rstrip('\n')
stdout, ret = util.RunCurlCommand(
'POST', 'droplets', {
'name':
self.name,
'region':
self.zone,
'size':
self.machine_type,
'image':
self.image,
'backups':
False,
'ipv6':
False,
'private_networking':
True,
'ssh_keys': [],
'user_data':
CLOUD_CONFIG_TEMPLATE.format(self.user_name, public_key)
})
if ret != 0:
msg = GetErrorMessage(stdout)
if ret in FATAL_CREATION_ERRORS:
raise errors.Error(
'Creation request invalid, not retrying: %s' % msg)
raise errors.Resource.RetryableCreationError(
'Creation failed: %s' % msg)
response = json.loads(stdout)
self.droplet_id = response['droplet']['id']
# The freshly created droplet will be in a locked and unusable
# state for a while, and it cannot be deleted or modified in
# this state. Wait for the action to finish and check the
# reported result.
if not self._GetActionResult(response['links']['actions'][0]['id']):
raise errors.Resource.RetryableCreationError(
'Creation failed, see log.')
def _GetActionResult(self,
action_id,
wait_seconds=DEFAULT_ACTION_WAIT_SECONDS,
max_tries=DEFAULT_ACTION_MAX_TRIES):
"""Wait until a VM action completes."""
for _ in xrange(max_tries):
time.sleep(wait_seconds)
stdout, ret = util.RunCurlCommand('GET', 'actions/%s' % action_id)
if ret != 0:
logging.warn('Unexpected action lookup failure.')
return False
response = json.loads(stdout)
status = response['action']['status']
logging.debug('action %d: status is "%s".', action_id, status)
if status == 'completed':
return True
elif status == 'errored':
return False
# If we get here, waiting timed out. Treat as failure.
logging.debug('action %d: timed out waiting.', action_id)
return False