1 # Copyright (c) 2017 Cable Television Laboratories, Inc. ("CableLabs")
2 # and others. All rights reserved.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
18 from neutronclient.common.exceptions import PortNotFoundClient
19 from novaclient.exceptions import NotFound
21 from snaps.openstack.create_network import PortSettings
22 from snaps.openstack.utils import glance_utils
23 from snaps.openstack.utils import neutron_utils
24 from snaps.openstack.utils import nova_utils
25 from snaps.provisioning import ansible_utils
27 __author__ = 'spisarski'
29 logger = logging.getLogger('create_instance')
32 STATUS_ACTIVE = 'ACTIVE'
33 STATUS_DELETED = 'DELETED'
36 class OpenStackVmInstance:
38 Class responsible for creating a VM instance in OpenStack
41 def __init__(self, os_creds, instance_settings, image_settings,
42 keypair_settings=None):
45 :param os_creds: The connection credentials to the OpenStack API
46 :param instance_settings: Contains the settings for this VM
47 :param image_settings: The OpenStack image object settings
48 :param keypair_settings: The keypair metadata (Optional)
51 self.__os_creds = os_creds
56 self.instance_settings = instance_settings
57 self.image_settings = image_settings
58 self.keypair_settings = keypair_settings
60 # TODO - get rid of FIP list and only use the dict(). Need to fix
61 # populating this object when already exists
62 self.__floating_ips = list()
63 self.__floating_ip_dict = dict()
65 # Instantiated in self.create()
68 # Note: this object does not change after the VM becomes active
71 def create(self, cleanup=False, block=False):
74 :param cleanup: When true, only perform lookups for OpenStack objects.
75 :param block: Thread will block until instance has either become
76 active, error, or timeout waiting.
77 Additionally, when True, floating IPs will not be applied
79 :return: The VM reference object
81 self.__nova = nova_utils.nova_client(self.__os_creds)
82 self.__neutron = neutron_utils.neutron_client(self.__os_creds)
84 self.__ports = self.__setup_ports(self.instance_settings.port_settings,
86 self.__lookup_existing_vm_by_name()
87 if not self.__vm and not cleanup:
88 self.__create_vm(block)
91 def __lookup_existing_vm_by_name(self):
93 Populates the member variables 'self.vm' and 'self.floating_ips' if a
94 VM with the same name already exists
97 servers = nova_utils.get_servers_by_name(self.__nova,
98 self.instance_settings.name)
99 for server in servers:
100 if server.name == self.instance_settings.name:
103 'Found existing machine with name - %s',
104 self.instance_settings.name)
105 fips = neutron_utils.get_floating_ips(self.__neutron)
107 for subnet_name, ips in server.networks.items():
109 self.__floating_ips.append(fip)
110 # TODO - Determine a means to associate to the FIP
111 # configuration and add to FIP map
113 def __create_vm(self, block=False):
115 Responsible for creating the VM instance
116 :param block: Thread will block until instance has either become
117 active, error, or timeout waiting. Floating IPs will be
118 assigned after active when block=True
120 glance = glance_utils.glance_client(self.__os_creds)
121 self.__vm = nova_utils.create_server(
122 self.__nova, self.__neutron, glance, self.instance_settings,
123 self.image_settings, self.keypair_settings)
124 logger.info('Created instance with name - %s',
125 self.instance_settings.name)
128 if not self.vm_active(block=True):
130 'Fatal error, VM did not become ACTIVE within the alloted '
133 # Create server should do this but found it needed to occur here
134 for sec_grp_name in self.instance_settings.security_group_names:
135 if self.vm_active(block=True):
136 nova_utils.add_security_group(self.__nova, self.__vm,
140 'Cannot applying security group with name ' +
142 ' to VM that did not activate with name - ' +
143 self.instance_settings.name)
145 self.__apply_floating_ips()
147 def __apply_floating_ips(self):
149 Applies the configured floating IPs to the necessary ports
152 for key, port in self.__ports:
153 port_dict[key] = port
156 for floating_ip_setting in self.instance_settings.floating_ip_settings:
157 port = port_dict.get(floating_ip_setting.port_name)
161 'Cannot find port object with name - ' +
162 floating_ip_setting.port_name)
164 # Setup Floating IP only if there is a router with an external
166 ext_gateway = self.__ext_gateway_by_router(
167 floating_ip_setting.router_name)
169 subnet = neutron_utils.get_subnet_by_name(
170 self.__neutron, floating_ip_setting.subnet_name)
171 floating_ip = neutron_utils.create_floating_ip(
172 self.__neutron, ext_gateway)
173 self.__floating_ips.append(floating_ip)
174 self.__floating_ip_dict[floating_ip_setting.name] = floating_ip
177 'Created floating IP %s via router - %s', floating_ip.ip,
178 floating_ip_setting.router_name)
179 self.__add_floating_ip(floating_ip, port, subnet)
181 raise Exception('Unable to add floating IP to port,'
182 ' cannot locate router with an external '
185 def __ext_gateway_by_router(self, router_name):
187 Returns network name for the external network attached to a router or
189 :param router_name: The name of the router to lookup
190 :return: the external network name or None
192 router = neutron_utils.get_router_by_name(self.__neutron, router_name)
193 if router and router.external_gateway_info:
194 network = neutron_utils.get_network_by_id(
196 router.external_gateway_info['network_id'])
203 Destroys the VM instance
206 # Cleanup floating IPs
207 for floating_ip in self.__floating_ips:
209 logger.info('Deleting Floating IP - ' + floating_ip.ip)
210 neutron_utils.delete_floating_ip(self.__neutron, floating_ip)
211 except Exception as e:
212 logger.error('Error deleting Floating IP - ' + str(e))
213 self.__floating_ips = list()
214 self.__floating_ip_dict = dict()
217 for name, port in self.__ports:
218 logger.info('Deleting Port - ' + name)
220 neutron_utils.delete_port(self.__neutron, port)
221 except PortNotFoundClient as e:
222 logger.warning('Unexpected error deleting port - %s', e)
224 self.__ports = list()
230 'Deleting VM instance - ' + self.instance_settings.name)
231 nova_utils.delete_vm_instance(self.__nova, self.__vm)
232 except Exception as e:
233 logger.error('Error deleting VM - %s', e)
235 # Block until instance cannot be found or returns the status of
237 logger.info('Checking deletion status')
240 if self.vm_deleted(block=True):
242 'VM has been properly deleted VM with name - %s',
243 self.instance_settings.name)
247 'VM not deleted within the timeout period of %s '
248 'seconds', self.instance_settings.vm_delete_timeout)
249 except Exception as e:
251 'Unexpected error while checking VM instance status - %s',
254 def __setup_ports(self, port_settings, cleanup):
256 Returns the previously configured ports or creates them if they do not
258 :param port_settings: A list of PortSetting objects
259 :param cleanup: When true, only perform lookups for OpenStack objects.
260 :return: a list of OpenStack port tuples where the first member is the
261 port name and the second is the port object
265 for port_setting in port_settings:
266 port = neutron_utils.get_port_by_name(self.__neutron,
269 ports.append((port_setting.name, {'port': port}))
271 # Exception will be raised when port with same name already
274 (port_setting.name, neutron_utils.create_port(
275 self.__neutron, self.__os_creds, port_setting)))
279 def __add_floating_ip(self, floating_ip, port, subnet, timeout=30,
280 poll_interval=POLL_INTERVAL):
282 Returns True when active else False
283 TODO - Make timeout and poll_interval configurable...
288 # Take IP of subnet if there is one configured on which to place
290 for fixed_ip in port.fixed_ips:
291 if fixed_ip['subnet_id'] == subnet['subnet']['id']:
292 ip = fixed_ip['ip_address']
295 # Simply take the first
296 ip = port.ips[0]['ip_address']
299 count = timeout / poll_interval
301 logger.debug('Attempting to add floating IP to instance')
303 nova_utils.add_floating_ip_to_server(
304 self.__nova, self.__vm, floating_ip, ip)
306 'Added floating IP %s to port IP %s on instance %s',
307 floating_ip.ip, ip, self.instance_settings.name)
309 except Exception as e:
311 'Retry adding floating IP to instance. Last attempt '
312 'failed with - %s', e)
313 time.sleep(poll_interval)
318 'Unable find IP address on which to place the floating IP')
320 logger.error('Timeout attempting to add the floating IP to instance.')
321 raise Exception('Timeout while attempting add floating IP to instance')
323 def get_os_creds(self):
325 Returns the OpenStack credentials used to create these objects
326 :return: the credentials
328 return self.__os_creds
330 def get_vm_inst(self):
332 Returns the latest version of this server object from OpenStack
333 :return: Server object
337 def get_os_vm_server_obj(self):
339 Returns the OpenStack server object
340 :return: the server object
342 return nova_utils.get_latest_server_os_object(self.__nova, self.__vm)
344 def get_port_ip(self, port_name, subnet_name=None):
346 Returns the first IP for the port corresponding with the port_name
347 parameter when subnet_name is None else returns the IP address that
348 corresponds to the subnet_name parameter
349 :param port_name: the name of the port from which to return the IP
350 :param subnet_name: the name of the subnet attached to this IP
351 :return: the IP or None if not found
353 port = self.get_port_by_name(port_name)
356 subnet = neutron_utils.get_subnet_by_name(self.__neutron,
359 logger.warning('Cannot retrieve port IP as subnet could '
360 'not be located with name - %s',
363 for fixed_ip in port.ips:
364 if fixed_ip['subnet_id'] == subnet.id:
365 return fixed_ip['ip_address']
367 if port.ips and len(port.ips) > 0:
368 return port.ips[0]['ip_address']
371 def get_port_mac(self, port_name):
373 Returns the first IP for the port corresponding with the port_name
375 TODO - Add in the subnet as an additional parameter as a port may have
377 :param port_name: the name of the port from which to return the IP
378 :return: the IP or None if not found
380 port = self.get_port_by_name(port_name)
382 return port.mac_address
385 def get_port_by_name(self, port_name):
387 Retrieves the OpenStack port object by its given name
388 :param port_name: the name of the port
389 :return: the OpenStack port object or None if not exists
391 for key, port in self.__ports:
394 logger.warning('Cannot find port with name - ' + port_name)
397 def config_nics(self):
399 Responsible for configuring NICs on RPM systems where the instance has
400 more than one configured port
401 :return: the value returned by ansible_utils.apply_ansible_playbook()
403 if len(self.__ports) > 1 and len(self.__floating_ips) > 0:
404 if self.vm_active(block=True) and self.vm_ssh_active(block=True):
405 for key, port in self.__ports:
406 port_index = self.__ports.index((key, port))
408 nic_name = 'eth' + repr(port_index)
409 retval = self.__config_nic(
411 self.__get_first_provisioning_floating_ip().ip)
412 logger.info('Configured NIC - %s on VM - %s',
413 nic_name, self.instance_settings.name)
416 def __get_first_provisioning_floating_ip(self):
418 Returns the first floating IP tagged with the Floating IP name if
419 exists else the first one found
422 for floating_ip_setting in self.instance_settings.floating_ip_settings:
423 if floating_ip_setting.provisioning:
424 fip = self.__floating_ip_dict.get(floating_ip_setting.name)
427 elif len(self.__floating_ips) > 0:
428 return self.__floating_ips[0]
430 def __config_nic(self, nic_name, port, ip):
432 Although ports/NICs can contain multiple IPs, this code currently only
435 :param nic_name: Name of the interface
436 :param port: The port information containing the expected IP values.
437 :param ip: The IP on which to apply the playbook.
438 :return: the return value from ansible
440 port_ip = port.ips[0]['ip_address']
443 'nic_name': nic_name,
447 if self.image_settings.nic_config_pb_loc and self.keypair_settings:
448 return self.apply_ansible_playbook(
449 self.image_settings.nic_config_pb_loc, variables)
452 'VM %s cannot self configure NICs eth1++. No playbook or '
453 'keypairs found.', self.instance_settings.name)
455 def apply_ansible_playbook(self, pb_file_loc, variables=None,
458 Applies a playbook to a VM
459 :param pb_file_loc: the file location of the playbook to be applied
460 :param variables: a dict() of substitution values required by the
462 :param fip_name: the name of the floating IP to use for applying the
463 playbook (default - will take the first)
464 :return: the return value from ansible
466 return ansible_utils.apply_playbook(
467 pb_file_loc, [self.get_floating_ip(fip_name=fip_name).ip],
468 self.get_image_user(), self.keypair_settings.private_filepath,
469 variables, self.__os_creds.proxy_settings)
471 def get_image_user(self):
473 Returns the instance sudo_user if it has been configured in the
474 instance_settings else it returns the image_settings.image_user value
476 if self.instance_settings.sudo_user:
477 return self.instance_settings.sudo_user
479 return self.image_settings.image_user
481 def vm_deleted(self, block=False, poll_interval=POLL_INTERVAL):
483 Returns true when the VM status returns the value of
484 expected_status_code or instance retrieval throws a NotFound exception.
485 :param block: When true, thread will block until active or timeout
486 value in seconds has been exceeded (False)
487 :param poll_interval: The polling interval in seconds
491 return self.__vm_status_check(
492 STATUS_DELETED, block,
493 self.instance_settings.vm_delete_timeout, poll_interval)
494 except NotFound as e:
496 "Instance not found when querying status for %s with message "
497 "%s", STATUS_DELETED, e)
500 def vm_active(self, block=False, poll_interval=POLL_INTERVAL):
502 Returns true when the VM status returns the value of
504 :param block: When true, thread will block until active or timeout
505 value in seconds has been exceeded (False)
506 :param poll_interval: The polling interval in seconds
509 return self.__vm_status_check(STATUS_ACTIVE, block,
510 self.instance_settings.vm_boot_timeout,
513 def __vm_status_check(self, expected_status_code, block, timeout,
516 Returns true when the VM status returns the value of
518 :param expected_status_code: instance status evaluated with this
520 :param block: When true, thread will block until active or timeout
521 value in seconds has been exceeded (False)
522 :param timeout: The timeout value
523 :param poll_interval: The polling interval in seconds
526 # sleep and wait for VM status change
530 return self.__status(expected_status_code)
532 while timeout > time.time() - start:
533 status = self.__status(expected_status_code)
535 logger.info('VM is - ' + expected_status_code)
538 logger.debug('Retry querying VM status in ' + str(
539 poll_interval) + ' seconds')
540 time.sleep(poll_interval)
541 logger.debug('VM status query timeout in ' + str(
542 timeout - (time.time() - start)))
545 'Timeout checking for VM status for ' + expected_status_code)
548 def __status(self, expected_status_code):
550 Returns True when active else False
551 :param expected_status_code: instance status evaluated with this string
558 instance = nova_utils.get_latest_server_os_object(
559 self.__nova, self.__vm)
561 logger.warning('Cannot find instance with id - ' + self.__vm.id)
564 if instance.status == 'ERROR':
565 raise Exception('Instance had an error during deployment')
567 'Instance status [%s] is - %s', self.instance_settings.name,
569 return instance.status == expected_status_code
571 def vm_ssh_active(self, block=False, poll_interval=POLL_INTERVAL):
573 Returns true when the VM can be accessed via SSH
574 :param block: When true, thread will block until active or timeout
575 value in seconds has been exceeded (False)
576 :param poll_interval: The polling interval
579 # sleep and wait for VM status change
580 logger.info('Checking if VM is active')
582 timeout = self.instance_settings.ssh_connect_timeout
584 if self.vm_active(block=True):
588 start = time.time() - timeout
590 while timeout > time.time() - start:
591 status = self.__ssh_active()
593 logger.info('SSH is active for VM instance')
596 logger.debug('Retry SSH connection in ' + str(
597 poll_interval) + ' seconds')
598 time.sleep(poll_interval)
599 logger.debug('SSH connection timeout in ' + str(
600 timeout - (time.time() - start)))
602 logger.error('Timeout attempting to connect with VM via SSH')
605 def __ssh_active(self):
607 Returns True when can create a SSH session else False
610 if len(self.__floating_ips) > 0:
611 ssh = self.ssh_client()
616 def get_floating_ip(self, fip_name=None):
618 Returns the floating IP object byt name if found, else the first known,
620 :param fip_name: the name of the floating IP to return
621 :return: the SSH client or None
624 if fip_name and self.__floating_ip_dict.get(fip_name):
625 return self.__floating_ip_dict.get(fip_name)
626 if not fip and len(self.__floating_ips) > 0:
627 return self.__floating_ips[0]
630 def ssh_client(self, fip_name=None):
632 Returns an SSH client using the name or the first known floating IP if
634 :param fip_name: the name of the floating IP to return
635 :return: the SSH client or None
637 fip = self.get_floating_ip(fip_name)
639 return ansible_utils.ssh_client(
640 self.__floating_ips[0].ip, self.get_image_user(),
641 self.keypair_settings.private_filepath,
642 proxy_settings=self.__os_creds.proxy_settings)
645 'Cannot return an SSH client. No Floating IP configured')
647 def add_security_group(self, security_group):
649 Adds a security group to this VM. Call will block until VM is active.
650 :param security_group: the SNAPS SecurityGroup domain object
651 :return True if successful else False
653 self.vm_active(block=True)
655 if not security_group:
656 logger.warning('Security group object is None, cannot add')
660 nova_utils.add_security_group(self.__nova, self.get_vm_inst(),
663 except NotFound as e:
664 logger.warning('Security group not added - ' + str(e))
667 def remove_security_group(self, security_group):
669 Removes a security group to this VM. Call will block until VM is active
670 :param security_group: the OpenStack security group object
671 :return True if successful else False
673 self.vm_active(block=True)
675 if not security_group:
676 logger.warning('Security group object is None, cannot remove')
680 nova_utils.remove_security_group(self.__nova, self.get_vm_inst(),
683 except NotFound as e:
684 logger.warning('Security group not removed - ' + str(e))
688 class VmInstanceSettings:
690 Class responsible for holding configuration setting for a VM Instance
693 def __init__(self, **kwargs):
696 :param name: the name of the VM
697 :param flavor: the VM's flavor
698 :param port_settings: the port configuration settings (required)
699 :param security_group_names: a set of names of the security groups to
701 :param floating_ip_settings: the floating IP configuration settings
702 :param sudo_user: the sudo user of the VM that will override the
703 instance_settings.image_user when trying to
705 :param vm_boot_timeout: the amount of time a thread will sleep waiting
706 for an instance to boot
707 :param vm_delete_timeout: the amount of time a thread will sleep
708 waiting for an instance to be deleted
709 :param ssh_connect_timeout: the amount of time a thread will sleep
710 waiting obtaining an SSH connection to a VM
711 :param availability_zone: the name of the compute server on which to
712 deploy the VM (optional)
713 :param userdata: the cloud-init script to run after the VM has been
716 self.name = kwargs.get('name')
717 self.flavor = kwargs.get('flavor')
718 self.sudo_user = kwargs.get('sudo_user')
719 self.userdata = kwargs.get('userdata')
721 self.port_settings = list()
722 port_settings = kwargs.get('ports')
723 if not port_settings:
724 port_settings = kwargs.get('port_settings')
726 for port_setting in port_settings:
727 if isinstance(port_setting, dict):
728 self.port_settings.append(PortSettings(**port_setting))
729 elif isinstance(port_setting, PortSettings):
730 self.port_settings.append(port_setting)
732 if kwargs.get('security_group_names'):
733 if isinstance(kwargs['security_group_names'], list):
734 self.security_group_names = kwargs['security_group_names']
735 elif isinstance(kwargs['security_group_names'], set):
736 self.security_group_names = kwargs['security_group_names']
737 elif isinstance(kwargs['security_group_names'], str):
738 self.security_group_names = [kwargs['security_group_names']]
741 'Invalid data type for security_group_names attribute')
743 self.security_group_names = set()
745 self.floating_ip_settings = list()
746 floating_ip_settings = kwargs.get('floating_ips')
747 if not floating_ip_settings:
748 floating_ip_settings = kwargs.get('floating_ip_settings')
749 if floating_ip_settings:
750 for floating_ip_config in floating_ip_settings:
751 if isinstance(floating_ip_config, FloatingIpSettings):
752 self.floating_ip_settings.append(floating_ip_config)
754 self.floating_ip_settings.append(FloatingIpSettings(
755 **floating_ip_config['floating_ip']))
757 if kwargs.get('vm_boot_timeout'):
758 self.vm_boot_timeout = kwargs['vm_boot_timeout']
760 self.vm_boot_timeout = 900
762 if kwargs.get('vm_delete_timeout'):
763 self.vm_delete_timeout = kwargs['vm_delete_timeout']
765 self.vm_delete_timeout = 300
767 if kwargs.get('ssh_connect_timeout'):
768 self.ssh_connect_timeout = kwargs['ssh_connect_timeout']
770 self.ssh_connect_timeout = 180
772 if kwargs.get('availability_zone'):
773 self.availability_zone = kwargs['availability_zone']
775 self.availability_zone = None
777 if not self.name or not self.flavor:
779 'Instance configuration requires the attributes: name, flavor')
781 if len(self.port_settings) == 0:
783 'Instance configuration requires port settings (aka. NICS)')
786 class FloatingIpSettings:
788 Class responsible for holding configuration settings for a floating IP
791 def __init__(self, **kwargs):
794 :param name: the name of the floating IP
795 :param port_name: the name of the router to the external network
796 :param router_name: the name of the router to the external network
797 :param subnet_name: the name of the subnet on which to attach the
799 :param provisioning: when true, this floating IP can be used for
802 TODO - provisioning flag is a hack as I have only observed a single
803 Floating IPs that actually works on an instance. Multiple floating IPs
804 placed on different subnets from the same port are especially
805 troublesome as you cannot predict which one will actually connect.
806 For now, it is recommended not to setup multiple floating IPs on an
807 instance unless absolutely necessary.
809 self.name = kwargs.get('name')
810 self.port_name = kwargs.get('port_name')
811 self.router_name = kwargs.get('router_name')
812 self.subnet_name = kwargs.get('subnet_name')
813 if kwargs.get('provisioning') is not None:
814 self.provisioning = kwargs['provisioning']
816 self.provisioning = True
818 if not self.name or not self.port_name or not self.router_name:
820 'The attributes name, port_name and router_name are required '
821 'for FloatingIPSettings')