root / snf-occi-server.py @ 592e8117
History | View | Annotate | Download (7.8 kB)
1 |
#!/usr/bin/env python
|
---|---|
2 |
|
3 |
from kamaki.clients.compute import ComputeClient |
4 |
from kamaki.config import Config |
5 |
|
6 |
from occi.core_model import Mixin, Resource, Link, Entity |
7 |
from occi.backend import ActionBackend, KindBackend, MixinBackend |
8 |
from occi.extensions.infrastructure import COMPUTE, START, STOP, SUSPEND, RESTART, RESOURCE_TEMPLATE, OS_TEMPLATE |
9 |
|
10 |
from occi.wsgi import Application |
11 |
|
12 |
from wsgiref.simple_server import make_server |
13 |
from wsgiref.validate import validator |
14 |
|
15 |
|
16 |
class MyBackend(KindBackend, ActionBackend): |
17 |
'''
|
18 |
An very simple abstract backend which handles update and replace for
|
19 |
attributes. Support for links and mixins would need to added.
|
20 |
'''
|
21 |
|
22 |
def update(self, old, new, extras): |
23 |
# here you can check what information from new_entity you wanna bring
|
24 |
# into old_entity
|
25 |
|
26 |
# trigger your hypervisor and push most recent information
|
27 |
print('Updating a resource with id: ' + old.identifier)
|
28 |
for item in new.attributes.keys(): |
29 |
old.attributes[item] = new.attributes[item] |
30 |
|
31 |
def replace(self, old, new, extras): |
32 |
print('Replacing a resource with id: ' + old.identifier)
|
33 |
old.attributes = {} |
34 |
for item in new.attributes.keys(): |
35 |
old.attributes[item] = new.attributes[item] |
36 |
old.attributes['occi.compute.state'] = 'inactive' |
37 |
|
38 |
|
39 |
class ComputeBackend(MyBackend): |
40 |
'''
|
41 |
Backend for Cyclades/Openstack compute instances
|
42 |
'''
|
43 |
|
44 |
def create(self, entity, extras): |
45 |
|
46 |
for mixin in entity.mixins: |
47 |
if mixin.related[0].term == 'os_tpl': |
48 |
image = mixin |
49 |
image_id = mixin.attributes['occi.core.id']
|
50 |
if mixin.related[0].term == 'resource_tpl': |
51 |
flavor = mixin |
52 |
flavor_id = mixin.attributes['occi.core.id']
|
53 |
|
54 |
entity.attributes['occi.compute.state'] = 'active' |
55 |
entity.actions = [STOP, SUSPEND, RESTART] |
56 |
|
57 |
#Registry identifier is the uuid key occi.handler assigns
|
58 |
#attribute 'occi.core.id' will be the snf-server id
|
59 |
|
60 |
snf = ComputeClient(Config()) |
61 |
vm_name = entity.attributes['occi.compute.hostname']
|
62 |
info = snf.create_server(vm_name, flavor_id, image_id) |
63 |
entity.attributes['occi.core.id'] = str(info['id']) |
64 |
entity.attributes['occi.compute.cores'] = flavor.attributes['occi.compute.cores'] |
65 |
entity.attributes['occi.compute.memory'] = flavor.attributes['occi.compute.memory'] |
66 |
|
67 |
def retrieve(self, entity, extras): |
68 |
|
69 |
# triggering cyclades to retrieve up to date information
|
70 |
|
71 |
snf = ComputeClient(Config()) |
72 |
|
73 |
vm_id = int(entity.attributes['occi.core.id']) |
74 |
vm_info = snf.get_server_details(vm_id) |
75 |
vm_state = vm_info['status']
|
76 |
|
77 |
status_dict = {'ACTIVE' : 'active', |
78 |
'STOPPED' : 'inactive', |
79 |
'ERROR' : 'inactive', |
80 |
'BUILD' : 'inactive', |
81 |
'DELETED' : 'inactive', |
82 |
} |
83 |
|
84 |
entity.attributes['occi.compute.state'] = status_dict[vm_state]
|
85 |
|
86 |
if entity.attributes['occi.compute.state'] == 'inactive': |
87 |
entity.actions = [START] |
88 |
if entity.attributes['occi.compute.state'] == 'active': |
89 |
entity.actions = [STOP, SUSPEND, RESTART] |
90 |
if entity.attributes['occi.compute.state'] == 'suspended': |
91 |
entity.actions = [START] |
92 |
|
93 |
|
94 |
|
95 |
|
96 |
def delete(self, entity, extras): |
97 |
# delete vm with vm_id = entity.attributes['occi.core.id']
|
98 |
snf = ComputeClient(Config()) |
99 |
vm_id = int(entity.attributes['occi.core.id']) |
100 |
snf.delete_server(vm_id) |
101 |
|
102 |
|
103 |
def action(self, entity, action, extras): |
104 |
if action not in entity.actions: |
105 |
raise AttributeError("This action is currently no applicable.") |
106 |
elif action == START:
|
107 |
entity.attributes['occi.compute.state'] = 'active' |
108 |
entity.actions = [STOP, SUSPEND, RESTART] |
109 |
# read attributes from action and do something with it :-)
|
110 |
print('Starting virtual machine with id' + entity.identifier)
|
111 |
elif action == STOP:
|
112 |
entity.attributes['occi.compute.state'] = 'inactive' |
113 |
entity.actions = [START] |
114 |
# read attributes from action and do something with it :-)
|
115 |
print('Stopping virtual machine with id' + entity.identifier)
|
116 |
elif action == RESTART:
|
117 |
entity.actions = [STOP, SUSPEND, RESTART] |
118 |
entity.attributes['occi.compute.state'] = 'active' |
119 |
# read attributes from action and do something with it :-)
|
120 |
print('Restarting virtual machine with id' + entity.identifier)
|
121 |
elif action == SUSPEND:
|
122 |
entity.attributes['occi.compute.state'] = 'suspended' |
123 |
entity.actions = [START] |
124 |
# read attributes from action and do something with it :-)
|
125 |
print('Suspending virtual machine with id' + entity.identifier)
|
126 |
|
127 |
|
128 |
class MyAPP(Application): |
129 |
'''
|
130 |
An OCCI WSGI application.
|
131 |
'''
|
132 |
|
133 |
def __call__(self, environ, response): |
134 |
sec_obj = {'username': 'password'} |
135 |
|
136 |
|
137 |
#Refresh registry entries with current Cyclades state
|
138 |
snf = ComputeClient(Config()) |
139 |
|
140 |
'''
|
141 |
images = snf.list_images()
|
142 |
for image in images:
|
143 |
IMAGE_ATTRIBUTES = {'occi.core.id': str(image['id'])}
|
144 |
IMAGE = Mixin("http://schemas.ogf.org/occi/infrastructure#", str(image['name']), [OS_TEMPLATE], attributes = IMAGE_ATTRIBUTES)
|
145 |
self.register_backend(IMAGE, MixinBackend())
|
146 |
|
147 |
flavors = snf.list_flavors()
|
148 |
for flavor in flavors:
|
149 |
FLAVOR_ATTRIBUTES = {'occi.core.id': flavor['id'],
|
150 |
'occi.compute.cores': snf.get_flavor_details(flavor['id'])['cpu'],
|
151 |
'occi.compute.memory': snf.get_flavor_details(flavor['id'])['ram'],
|
152 |
'occi.storage.size': snf.get_flavor_details(flavor['id'])['disk'],
|
153 |
}
|
154 |
FLAVOR = Mixin("http://schemas.ogf.org/occi/infrastructure#", str(flavor['name']), [RESOURCE_TEMPLATE], attributes = FLAVOR_ATTRIBUTES)
|
155 |
self.register_backend(FLAVOR, MixinBackend())
|
156 |
'''
|
157 |
|
158 |
#TODO show only current VM instances
|
159 |
|
160 |
return self._call_occi(environ, response, security=sec_obj, foo=None) |
161 |
|
162 |
if __name__ == '__main__': |
163 |
|
164 |
APP = MyAPP() |
165 |
|
166 |
COMPUTE_BACKEND = ComputeBackend() |
167 |
|
168 |
APP.register_backend(COMPUTE, COMPUTE_BACKEND) |
169 |
APP.register_backend(START, COMPUTE_BACKEND) |
170 |
APP.register_backend(STOP, COMPUTE_BACKEND) |
171 |
APP.register_backend(RESTART, COMPUTE_BACKEND) |
172 |
APP.register_backend(SUSPEND, COMPUTE_BACKEND) |
173 |
APP.register_backend(RESOURCE_TEMPLATE, MixinBackend()) |
174 |
APP.register_backend(OS_TEMPLATE, MixinBackend()) |
175 |
|
176 |
snf = ComputeClient(Config()) |
177 |
|
178 |
images = snf.list_images() |
179 |
for image in images: |
180 |
IMAGE_ATTRIBUTES = {'occi.core.id': str(image['id'])} |
181 |
IMAGE = Mixin("http://schemas.ogf.org/occi/infrastructure#", str(image['name']), [OS_TEMPLATE], attributes = IMAGE_ATTRIBUTES) |
182 |
APP.register_backend(IMAGE, MixinBackend()) |
183 |
|
184 |
flavors = snf.list_flavors() |
185 |
for flavor in flavors: |
186 |
FLAVOR_ATTRIBUTES = {'occi.core.id': flavor['id'], |
187 |
'occi.compute.cores': snf.get_flavor_details(flavor['id'])['cpu'], |
188 |
'occi.compute.memory': snf.get_flavor_details(flavor['id'])['ram'], |
189 |
'occi.storage.size': snf.get_flavor_details(flavor['id'])['disk'], |
190 |
} |
191 |
FLAVOR = Mixin("http://schemas.ogf.org/occi/infrastructure#", str(flavor['name']), [RESOURCE_TEMPLATE], attributes = FLAVOR_ATTRIBUTES) |
192 |
APP.register_backend(FLAVOR, MixinBackend()) |
193 |
|
194 |
|
195 |
VALIDATOR_APP = validator(APP) |
196 |
HTTPD = make_server('', 8888, VALIDATOR_APP) |
197 |
HTTPD.serve_forever() |
198 |
|