1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
##############################################################################
# Copyright (c) 2018 Parker Berberian, Sawyer Bergeron, and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import re
from django.db.models import Q
from dashboard.exceptions import ResourceAvailabilityException
from resource_inventory.models import (
ResourceBundle,
ResourceTemplate,
Network,
Vlan,
PhysicalNetwork,
InterfaceConfiguration,
)
class ResourceManager:
instance = None
def __init__(self):
pass
@staticmethod
def getInstance():
if ResourceManager.instance is None:
ResourceManager.instance = ResourceManager()
return ResourceManager.instance
def getAvailableResourceTemplates(self, lab, user=None):
filter = Q(public=True)
if user:
filter = filter | Q(owner=user)
filter = filter & Q(temporary=False) & Q(lab=lab)
return ResourceTemplate.objects.filter(filter)
def templateIsReservable(self, resource_template):
"""
Check if the required resources to reserve this template is available.
No changes to the database
"""
# count up hosts
profile_count = {}
for config in resource_template.getConfigs():
if config.profile not in profile_count:
profile_count[config.profile] = 0
profile_count[config.profile] += 1
# check that all required hosts are available
for profile in profile_count.keys():
available = len(profile.get_resources(lab=resource_template.lab, unreserved=True))
needed = profile_count[profile]
if available < needed:
return False
return True
# public interface
def deleteResourceBundle(self, resourceBundle):
for resource in resourceBundle.get_resources():
resource.release()
resourceBundle.delete()
def get_vlans(self, resourceTemplate):
networks = {}
vlan_manager = resourceTemplate.lab.vlan_manager
for network in resourceTemplate.networks.all():
if network.is_public:
public_net = vlan_manager.get_public_vlan()
vlan_manager.reserve_public_vlan(public_net.vlan)
networks[network.name] = public_net.vlan
else:
vlan = vlan_manager.get_vlan()
vlan_manager.reserve_vlans(vlan)
networks[network.name] = vlan
return networks
def instantiateTemplate(self, resource_template):
"""
Convert a ResourceTemplate into a ResourceBundle.
Takes in a ResourceTemplate and reserves all the
Resources needed and returns a completed ResourceBundle.
"""
resource_bundle = ResourceBundle.objects.create(template=resource_template)
res_configs = resource_template.getConfigs()
resources = []
vlan_map = self.get_vlans(resource_template)
for config in res_configs:
try:
phys_res = self.acquireHost(config)
phys_res.bundle = resource_bundle
phys_res.config = config
resources.append(phys_res)
self.configureNetworking(resource_bundle, phys_res, vlan_map)
phys_res.save()
except Exception as e:
self.fail_acquire(resources, vlan_map, resource_template)
raise e
return resource_bundle
def configureNetworking(self, resource_bundle, resource, vlan_map):
for physical_interface in resource.interfaces.all():
# assign interface configs
iface_configs = InterfaceConfiguration.objects.filter(
profile=physical_interface.profile,
resource_config=resource.config
)
iface_config = iface_configs.first()
physical_interface.acts_as = iface_config
physical_interface.acts_as.save()
physical_interface.config.clear()
for connection in iface_config.connections.all():
physicalNetwork = PhysicalNetwork.objects.create(
vlan_id=vlan_map[connection.network.name],
generic_network=connection.network,
bundle=resource_bundle,
)
physical_interface.config.add(
Vlan.objects.create(
vlan_id=vlan_map[connection.network.name],
tagged=connection.vlan_is_tagged,
public=connection.network.is_public,
network=physicalNetwork
)
)
# private interface
def acquireHost(self, resource_config):
resources = resource_config.profile.get_resources(
lab=resource_config.template.lab,
unreserved=True
)
try:
resource = resources[0] # TODO: should we randomize and 'load balance' the servers?
resource.config = resource_config
resource.reserve()
return resource
except IndexError:
raise ResourceAvailabilityException("No available resources of requested type")
def releaseNetworks(self, template, vlans):
vlan_manager = template.lab.vlan_manager
for net_name, vlan_id in vlans.items():
net = Network.objects.get(name=net_name, bundle=template)
if(net.is_public):
vlan_manager.release_public_vlan(vlan_id)
else:
vlan_manager.release_vlans(vlan_id)
def fail_acquire(self, hosts, vlans, template):
self.releaseNetworks(template, vlans)
for host in hosts:
host.release()
class HostNameValidator(object):
regex = r'^[A-Za-z0-9][A-Za-z0-9-]*$'
message = "Hostnames can only contain alphanumeric characters and hyphens (-). Hostnames must start with a letter"
pattern = re.compile(regex)
@classmethod
def is_valid_hostname(cls, hostname):
return len(hostname) < 65 and cls.pattern.fullmatch(hostname) is not None
|
