5 The pattern used within the SNAPS-OO library for creating OpenStack
6 instances have been made as consistent as possible amongst the different
7 instance types. Each consists of a constructor that takes in a
8 credentials object and generally takes in a single "settings"
9 (configuration) object. The only exception to this rule is with the
10 OpenStackVMInstance (creates an OpenStack Server) where it takes in the
11 additional settings used for the associated image and SSH key-pairs
12 credentials as those objects contain additional attributes required of
13 SNAPS, primarily when one needs to obtain remote access. After
14 instantiation, the create() method must be called to initiate all of the
15 necessary remote API calls to OpenStack required for proper instance
21 As communicating with OpenStack is performed via secure remote RESTful
22 API calls, any function or method performing any type of query or CRUD
23 operation must know how to connect to the NFVI. The class ***OSCreds***
24 defined in *snaps.openstack.os\_credentials.py* contains everything
25 required to connect to any Keystone v2.0 or v3 authorization server. The
26 attributes are listed below:
31 - project\_name (aka. tenant\_name)
32 - identity\_api\_version (for obtaining Keystone authorization token.
33 default = 2, Versions 2.0 & v3 only validated.)
34 - image\_api\_version (default = 2, Glance version 1 & 2 only validated)
35 - network\_api\_version (Neutron version 2 currently only validated)
36 - compute\_api\_version (Nova version 2 currently only validated)
37 - heat\_api\_version (Heat version 1 currently only validated)
38 - volume\_api\_version (default = 2, Heat versions 2 & 3 currently only validated)
39 - user\_domain\_id (default='default')
40 - user\_domain\_name (default='Default')
41 - project\_domain\_id (default='default')
42 - project\_domain\_name (default='Default')
43 - interface (default='admin', used to specify the endpoint type for keystone: public, admin, internal)
44 - cacert (default=False, expected values T|F to denote server certificate verification, else value contains the path to an HTTPS certificate)
45 - region_name (The region name default=None)
48 - host (the HTTP proxy host)
49 - port (the HTTP proxy port)
50 - https\_host (the HTTPS proxy host, default value of host)
51 - https\_port (the HTTPS proxy port, default value of port)
52 - ssh\_proxy\_cmd (same as the value placed into ssh -o
53 ProxyCommand='<this config value>')
55 Create OS Credentials Object
56 ----------------------------
60 from snaps.openstack.os_credentials import OSCreds
61 os_creds=OSCreds(username='admin', password='admin',
62 auth_url='http://localhost:5000/v3', project_name='admin',
63 identity_api_version=3)
68 Each creator minimally requires an OSCreds object for connecting to the
69 NFVI, associated \*Settings object for instance configuration, create()
70 method to make the necessary remote API calls and create all of the
71 necessary OpenStack instances required, and clean() method that is
72 responsible for deleting all associated OpenStack instances. Please see
73 the class diagram `here </display/SNAP/SNAPS-OO+Classes>`__. Below is a
74 textual representation of the requirements of each creator classes with
75 their associated setting classes and a sample code snippet on how to use
80 - User - snaps.openstack.create\_user.OpenStackUser
82 - snaps.openstack.user.UserConfig
84 - name - the username (required)
85 - password - the user's password (required)
86 - project\_name - the name of the project to associated to this
88 - domain\_name - the user's domain (default='default')
89 - email - the user's email address (optional)
90 - enabled - flag to determine whether or not the user should be
91 enabled (default=True)
92 - roles - dict where key is the role's name and value is the name
93 the project to associate with the role (optional)
97 from snaps.config.user import UserConfig
98 from snaps.openstack.create_user import OpenStackUser
99 user_settings = UserConfig(name='username', password='password')
100 user_creator = OpenStackUser(os_creds, user_settings)
101 user_creator.create()
103 # Retrieve OS creds for new user for creating other OpenStack instance
104 user_creds = user_creator.get_os_creds(os_creds.project_name)
114 - Project - snaps.openstack.create\_project.OpenStackProject
116 - snaps.openstack.project.ProjectConfig
118 - name - the project name (required)
119 - domain - the project's domain (default='default')
120 - description - the project's description (optional)
121 - enabled - flag to determine whether or not the project should
122 be enabled (default=True)
127 from snaps.openstack.project import ProjectConfig
128 from snaps.openstack.create_project import OpenStackProject
129 project_settings = ProjectConfig(name='username', password='password')
130 project_creator = OpenStackProject(os_creds, project_settings)
131 project_creator.create()
137 project_creator.clean()
141 - Flavor - snaps.openstack.create\_flavor.OpenStackFlavor
143 - snaps.config.flavor.FlavorConfig
145 - name - the flavor name (required)
146 - flavor\_id - the flavor's string ID (default='auto')
147 - ram - memory in MB to allocate to VM (required)
148 - disk - disk storage in GB (required)
149 - vcpus - the number of CPUs to allocate to VM (required)
150 - ephemeral - the size of the ephemeral disk in GB (default=0)
151 - swap - the size of the swap disk in GB (default=0)
152 - rxtx\_factor - the receive/transmit factor to be set on ports
153 if backend supports QoS extension (default=1.0)
154 - is\_public - flag that denotes whether or not other projects
155 can access image (default=True)
156 - metadata - freeform dict() for special metadata (optional)
160 from snaps.config.flavor import FlavorConfig
161 from snaps.openstack.create_flavor import OpenStackFlavor
162 flavor_settings = FlavorConfig(name='flavor-name', ram=4, disk=10, vcpus=2)
163 flavor_creator = OpenStackFlavor(os_creds, flavor_settings)
164 flavor_creator.create()
170 flavor_creator.clean()
174 - Image - snaps.openstack.create\_image.OpenStackImage
176 - snaps.config.image.ImageConfig
178 - name - the image name (required)
179 - image\_user - the default image user generally used by
180 OpenStackVMInstance class for obtaining an SSH connection
182 - img\_format or format - the image's format (i.e. qcow2) (required)
183 - url - the download URL to obtain the image file (this or
184 image\_file must be configured, not both)
185 - image\_file - the location of the file to be sourced from the
186 local filesystem (this or url must be configured, not both)
187 - extra\_properties - dict() object containing extra parameters to
188 pass when loading the image (i.e. ids of kernel and initramfs images)
189 - nic\_config\_pb\_loc - the location of the ansible playbook
190 that can configure additional NICs. Floating IPs are required
191 to perform this operation. (optional and deprecated)
192 - kernel\_image\_settings - the image settings for a kernel image (optional)
193 - ramdisk\_image\_settings - the image settings for a ramdisk image (optional)
194 - public - image will be created with public visibility when True (default = False)
199 from snaps.openstack.create_image import OpenStackImage
200 from snaps.config.image import ImageConfig
201 image_settings = ImageConfig(name='image-name', image_user='ubuntu', img_format='qcow2',
202 url='http://uec-images.ubuntu.com/releases/trusty/14.04/ubuntu-14.04-server-cloudimg-amd64-disk1.img')
203 image_creator = OpenStackImage(os_creds, image_settings)
204 image_creator.create()
210 image_creator.clean()
214 - Keypair - snaps.openstack.create\_keypair.OpenStackKeypair
216 - snaps.openstack.keypair.KeypairConfig
218 - name - the keypair name (required)
219 - public\_filepath - the file location to where the public key is
220 to be written or currently resides (optional)
221 - private\_filepath - the file location to where the private key
222 file is to be written or currently resides (optional but highly
223 recommended to leverage or the private key will be lost
225 - key\_size - The number of bytes for the key size when it needs to
226 be generated (value must be >=512, default = 1024)
227 - delete\_on\_clean - when True, the key files will be deleted when
228 OpenStackKeypair#clean() is called (default = False)
232 from snaps.openstack.keypair.KeypairConfig
233 from snaps.openstack.create_keypairs import OpenStackKeypair
234 keypair_settings = KeypairConfig(name='kepair-name', private_filepath='/tmp/priv-kp')
235 keypair_creator = OpenStackKeypair(os_creds, keypair_settings)
236 keypair_creator.create()
242 keypair_creator.clean()
247 - Network - snaps.openstack.create\_network.OpenStackNetwork
249 - snaps.openstack.create\_network.NetworkSettings
251 - name - the name of the network (required)
252 - admin\_state\_up - flag denoting the administrative status of
253 the network (True = up, False = down)
254 - shared - flag indicating whether the network can be shared
255 across projects/tenants (default=True)
256 - project\_name - the name of the project (optional - can only be
258 - external - flag determining if network has external access
260 - network\_type - the type of network (i.e. vlan\|vxlan\|flat)
261 - physical\_network - the name of the physical network (required
262 when network\_type is 'flat')
263 - segmentation\_id - the id of the segmentation (required
264 when network\_type is 'vlan')
265 - subnet\_settings (list of optional
266 snaps.openstack.create\_network.SubnetSettings objects)
268 - cidr - the subnet's CIDR (required)
269 - ip\_version - 4 or 6 (default=4)
270 - name - the subnet name (required)
271 - project\_name - the name of the project (optional - can only
272 be set by admin users)
273 - start - the start address for the allocation pools
274 - end - the end address for the allocation pools
275 - gateway\_ip - the gateway IP
276 - enable\_dhcp - flag to determine whether or not to enable
278 - dns\_nameservers - a list of DNS nameservers
279 - host\_routes - list of host route dictionaries for subnet
280 (optional, see pydoc and Neutron API for more details)
281 - destination - the destination for static route (optional)
282 - nexthop - the next hop for the destination (optional)
283 - ipv6\_ra\_mode - valid values include: 'dhcpv6-stateful',
284 'dhcp6v-stateless', 'slaac' (optional)
285 - ipvc\_address\_mode - valid values include:
286 'dhcpv6-stateful', 'dhcp6v-stateless', 'slaac' (optional)
290 from snaps.openstack.create_network import NetworkSettings, SubnetSettings, OpenStackNetwork
292 subnet_settings = SubnetSettings(name='subnet-name', cidr='10.0.0.0/24')
293 network_settings = NetworkSettings(name='network-name', subnet_settings=[subnet_settings])
295 network_creator = OpenStackNetwork(os_creds, network_settings)
296 network_creator.create()
302 network_creator.clean()
304 Create Security Group
305 ---------------------
308 snaps.openstack.create\_security\_group.OpenStackSecurityGroup
310 - snaps.openstack.create\_security\_group.SecurityGroupSettings
312 - name - the security group's name (required)
313 - description - the description (optional)
314 - project\_name - the name of the project (optional - can only be
316 - rule\_settings (list of
317 optional snaps.openstack.create\_security\_group.SecurityGroupRuleSettings
320 - sec\_grp\_name - the name of the associated security group
322 - description - the description (optional)
324 snaps.openstack.create\_security\_group.Direction (required)
325 - remote\_group\_id - the group ID to associate with this rule
327 enum snaps.openstack.create\_security\_group.Protocol
330 enum snaps.openstack.create\_security\_group.Ethertype
332 - port\_range\_min - the max port number in the range that is
333 matched by the security group rule (optional)
334 - port\_range\_max - the min port number in the range that is
335 matched by the security group rule (optional)
336 - sec\_grp\_rule - the rule object to a security group rule
337 object to associate (note: does not work currently)
338 - remote\_ip\_prefix - the remote IP prefix to associate with
339 this metering rule packet (optional)
343 from snaps.openstack.create_security_group import SecurityGroupSettings, SecurityGroupRuleSettings, Direction, OpenStackSecurityGroup
345 rule_settings = SubnetSettings(name='subnet-name', cidr='10.0.0.0/24')
346 network_settings = NetworkSettings(name='network-name', subnet_settings=[subnet_settings])
348 sec_grp_name = 'sec-grp-name'
349 rule_settings = SecurityGroupRuleSettings(name=sec_grp_name, direction=Direction.ingress)
350 security_group_settings = SecurityGroupSettings(name=sec_grp_name, rule_settings=[rule_settings])
352 security_group_creator = OpenStackSecurityGroup(os_creds, security_group_settings)
353 security_group_creator.create()
359 security_group_creator.clean()
364 - Router - snaps.openstack.create\_router.OpenStackRouter
366 - snaps.openstack.router.RouterConfig
368 - name - the router name (required)
369 - project\_name - the name of the project (optional - can only be
371 - external\_gateway - the name of the external network (optional)
372 - admin\_state\_up - flag to denote the administrative status of
373 the router (default=True)
374 - external\_fixed\_ips - dictionary containing the IP address
375 parameters (parameter not tested)
376 - internal\_subnets - list of subnet names to which this router
377 will connect (optional)
378 - port\_settings (list of optional
379 snaps.openstack.create\_router.PortSettings objects) - creates
380 custom ports to internal subnets (similar to internal\_subnets
383 - name - the port's display name
384 - network\_name - the name of the network on which to create the port
385 - admin\_state\_up - A boolean value denoting the administrative
386 status of the port (default = True)
387 - project\_name - the name of the project (optional - can only
388 be set by admin users)
389 - mac\_address - the port's MAC address to set (optional and
390 recommended not to set this configuration value)
391 - ip\_addrs - list of dict() objects containing two keys 'subnet_name'
392 and 'ip' where the value of the 'ip' entry is the expected IP
393 address assigned. This value gets mapped to the fixed\_ips
395 - fixed\_ips - dict() where the key is the subnet ID and value is the
396 associated IP address to assign to the port (optional)
397 - security\_groups - list of security group IDs (not tested)
398 - allowed\_address\_pairs - A dictionary containing a set of zero or
399 more allowed address pairs. An address pair contains an IP address
400 and MAC address (optional)
401 - opt\_value - the extra DHCP option value (optional)
402 - opt\_name - the extra DHCP option name (optional)
403 - device\_owner - The ID of the entity that uses this port.
404 For example, a DHCP agent (optional)
405 - device\_id - The ID of the device that uses this port.
406 For example, a virtual server (optional)
410 from snaps.config.router import RouterConfig
411 from snaps.openstack.create_router import OpenStackRouter
413 router_settings = RouterConfig(name='router-name', external_gateway='external')
414 router_creator = OpenStackRouter(os_creds, router_settings)
415 router_creator.create()
421 router_creator.clean()
426 - Volume Type - snaps.openstack.create\_qos.OpenStackQoS
428 - snaps.openstack.qos.QoSConfig
430 - name - the volume type's name (required)
431 - consumer - the qos's consumer type of the enum type Consumer (required)
432 - specs - freeform dict() to be added as 'specs' (optional)
436 from snaps.openstack.qos import QoSConfig
437 from snaps.openstack.create_qos import OpenStackQoS
439 qos_settings = QoSConfig(name='stack-name', consumer=Consumer.front-end)
440 qos_creator = OpenStackQoS(os_creds, vol_type_settings)
452 - Volume Type - snaps.openstack.create\_volume\_type.OpenStackVolumeType
454 - snaps.config.volume\_type.VolumeTypeConfig
456 - name - the volume type's name (required)
457 - description - the volume type's description (optional)
458 - encryption - instance or config for VolumeTypeEncryptionConfig (optional)
459 - qos\_spec\_name - name of the QoS Spec to associate (optional)
460 - public - instance or config for VolumeTypeEncryptionConfig (optional)
464 from snaps.config.volume_type import VolumeTypeConfig
465 from snaps.openstack.create_volume_type import OpenStackVolumeType
467 vol_type_settings = VolumeTypeConfig(name='stack-name')
468 vol_type_creator = OpenStackHeatStack(os_creds, vol_type_settings)
469 vol_type_creator.create()
475 vol_type_creator.clean()
480 - Volume - snaps.openstack.create\_volume.OpenStackVolume
482 - snaps.config.volume.VolumeConfig
484 - name - the volume type's name (required)
485 - description - the volume type's description (optional)
486 - size - size of volume in GB (default = 1)
487 - image_name - when a glance image is used for the image source (optional)
488 - type\_name - the associated volume's type name (optional)
489 - availability\_zone - the name of the compute server on which to
490 deploy the volume (optional)
491 - multi_attach - when true, volume can be attached to more than one
492 server (default = False)
496 from snaps.config.volume import VolumeConfig
497 from snaps.openstack.create\_volume import OpenStackVolume
499 vol_settings = VolumeConfig(name='stack-name')
500 vol_creator = OpenStackVolume(os_creds, vol_settings)
507 vol_type_creator.clean()
512 - Heat Stack - snaps.openstack.create\_stack.OpenStackHeatStack
514 - snaps.config.stack.StackConfig
516 - name - the stack's name (required)
517 - template - the heat template in dict() format (required when
518 template_path is None)
519 - template\_path - the location of the heat template file (required
520 when template is None)
521 - env\_values - dict() of strings for substitution of template
522 default values (optional)
526 from snaps.config.stack import StackConfig
527 from snaps.openstack.create_stack import OpenStackHeatStack
529 stack_settings = StackConfig(name='stack-name', template_path='/tmp/template.yaml')
530 stack_creator = OpenStackHeatStack(os_creds, stack_settings)
531 stack_creator.create()
537 stack_creator.clean()
542 - VM Instances - snaps.openstack.create\_instance.OpenStackVmInstance
544 - snaps.openstack.create\_instance.VmInstanceSettings
546 - name - the name of the VM (required)
547 - flavor - the name of the flavor (required)
548 - port\_settings - list of
549 snaps.openstack.create\_network.PortSettings objects where each
550 denote a NIC (see above in create router section for details)
551 API does not require, but newer NFVIs now require VMs have at
553 - security\_group\_names - a list of security group names to
555 - floating\_ip\_settings (list of
556 snaps.openstack\_create\_instance.FloatingIpSettings objects)
558 - name - a name to a floating IP for easy lookup
559 - port\_name - the name of the VM port on which the floating
560 IP should be applied (required)
561 - router\_name - the name of the router to the external
563 - subnet\_name - the name of the subnet on which to attach the
564 floating IP (optional)
565 - provisioning - when true, this floating IP will be used for
566 provisioning which will come into play once we are able to
567 get multiple floating IPs working.
569 - sudo\_user - overrides the image\_settings.image\_user value
570 when attempting to connect via SSH
571 - vm\_boot\_timeout - the number of seconds that the thread will
572 block when querying the VM's status when building (default=900)
573 - vm\_delete\_timeout - the number of seconds that the thread
574 will block when querying the VM's status when deleting
576 - ssh\_connect\_timeout - the number of seconds that the thread
577 will block when attempting to obtain an SSH connection
579 - availability\_zone - the name of the compute server on which to
580 deploy the VM (optional must be admin)
581 - userdata - the cloud-init script to execute after VM has been
584 - image\_settings - see snaps.config.image.ImageConfig
586 - keypair\_settings - see
587 snaps.openstack.keypair.KeypairConfig above (optional)
591 from snaps.openstack.create_instance import VmInstanceSettings, FloatingIpSettings, OpenStackVmInstance
592 from snaps.openstack.create_network import PortSettings
594 port_settings = PortSettings(name='port-name', network_name=network_settings.name)
595 floating_ip_settings = FloatingIpSettings(name='fip1', port_name=port_settings.name, router_name=router_settings.name)
596 instance_settings = VmInstanceSettings(name='vm-name', flavor='flavor_settings.name', port_settings=[port_settings],
597 floating_ip_settings=[floating_ip_settings])
599 instance_creator = OpenStackVmInstance(os_creds, instance_settings, image_settings, kepair_settings)
600 instance_creator.create()
604 ssh_client = instance_creator.ssh_client()
608 instance_creator.clean()
613 Being able to easily create OpenStack instances such as virtual networks
614 and VMs is a good start to the problem of NFV; however, an NFVI is
615 useless unless there is some software performing some function. This is
616 why we added Ansible playbook support to SNAPS-OO which can be located
617 in snaps.provisioning.ansible\_utils#apply\_playbook. See below for a
618 description of that function's parameters:
620 - playbook\_path - the file location of the ansible playbook
621 - hosts\_inv - a list of hosts/IP addresses to which the playbook will
623 - host\_user - the user (preferably sudo) to use for applying the
625 - ssh\_priv\_key\_file\_path - the location to the private key file
627 - variables - a dict() of substitution values for Jinga2 templates
629 - proxy\_setting - used to extract the SSH proxy command (optional)
631 Apply Ansible Playbook Utility
632 ------------------------------
636 from snaps.provisioning import ansible_utils
638 ansible_utils.apply_playbook(playbook_path='provisioning/tests/playbooks/simple_playbook.yml',
639 hosts_inv=[ip], host_user=user, ssh_priv_key_file_path=priv_key,
640 proxy_setting=self.os_creds.proxy_settings)
645 For those who do like working procedurally, SNAPS-OO also leverages
646 utilitarian functions for nearly every query or request made to
647 OpenStack. This pattern will make it easier to deal with API version
648 changes as they would all be made in one place. (see keystone\_utils for
649 an example of this pattern as this is the only API where SNAPS is
650 supporting more than one version)
652 - snaps.openstack.utils.keystone\_utils - for calls to the Keystone
653 APIs (support for versions 2 & 3)
654 - snaps.openstack.utils.glance\_utils - for calls to the Glance APIs
655 (support for versions 1 & 2)
656 - snaps.openstack.utils.neutron\_utils - for calls to the Neutron APIs
658 - snaps.openstack.utils.nova\_utils - for calls to the Nova APIs (version 2)
659 - snaps.openstack.utils.heat\_utils - for calls to the Heat APIs (version 1)
660 - snaps.openstack.utils.cinder\_utils - for calls to the Cinder APIs
661 (support for versions 2 & 3)