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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
#
# -------------------------------------------------------------------------
# Copyright (c) 2019 AT&T Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
#
#!/bin/python
from valet.engine.resource_manager.resources.datacenter import Datacenter
from valet.engine.resource_manager.resources.host_group import HostGroup
class TopologyManager(object):
"""Manager to maintain the layout of datacenter."""
def __init__(self, _source, _logger):
self.source = _source
self.datacenter = None
self.host_groups = {}
self.hosts = {}
self.logger = _logger
def get_topology(self, _resource):
"""Set datacenter layout into resource."""
self.logger.info("set datacenter layout...")
# Init first
self.datacenter = Datacenter(_resource.datacenter_id)
self.host_groups.clear()
self.hosts.clear()
if self.source.get_topology(self.datacenter, self.host_groups, self.hosts,
_resource.hosts) != "ok":
return False
self._check_updated(_resource)
return True
def _check_updated(self, _resource):
"""Check if the layout is changed."""
if _resource.datacenter is None:
_resource.datacenter = Datacenter(_resource.datacenter_id)
_resource.datacenter.updated = True
self.logger.info("new datacenter (" + _resource.datacenter_id + ") added")
for hgk in self.host_groups.keys():
if hgk not in _resource.host_groups.keys():
new_host_group = HostGroup(hgk)
new_host_group.host_type = self.host_groups[hgk].host_type
_resource.host_groups[new_host_group.name] = new_host_group
_resource.mark_host_group_updated(hgk)
self.logger.info("new host_group (" + hgk + ") added")
for rhgk in _resource.host_groups.keys():
if rhgk not in self.host_groups.keys():
host_group = _resource.host_groups[rhgk]
host_group.status = "disabled"
host_group.mark_host_group_updated(rhgk)
self.logger.info("host_group (" + rhgk + ") disabled")
# TODO(Gueyoung): what if host exists in topology,
# but does not in resource (DB or platform)?
for rhk in _resource.hosts.keys():
if not _resource.hosts[rhk].is_available():
continue
if rhk not in self.hosts.keys():
_resource.hosts[rhk].status = "disabled"
_resource.mark_host_updated(rhk)
self.logger.info("host (" + rhk + ") removed from topology")
if self._is_datacenter_updated(_resource):
_resource.datacenter.updated = True
for hgk in self.host_groups.keys():
hg = self.host_groups[hgk]
if self._is_host_group_updated(hg, _resource):
_resource.mark_host_group_updated(hgk)
for hk in self.hosts.keys():
if hk in _resource.hosts.keys():
if not _resource.hosts[hk].is_available():
continue
host = self.hosts[hk]
if self._is_host_updated(host, _resource):
_resource.mark_host_updated(hk)
# TODO(Gueyoung): Hierachical failure propagation
def _is_datacenter_updated(self, _resource):
"""Check if datacenter's resources are changed."""
updated = False
_rdatacenter = _resource.datacenter
for rk in self.datacenter.resources.keys():
h = None
if rk in _resource.host_groups.keys():
h = _resource.host_groups[rk]
elif rk in _resource.hosts.keys():
h = _resource.hosts[rk]
if h is not None and h.is_available():
if rk not in _rdatacenter.resources.keys() or h.updated:
_rdatacenter.resources[rk] = h
updated = True
self.logger.info("datacenter updated (new resource)")
for rk in _rdatacenter.resources.keys():
h = None
if rk in _resource.host_groups.keys():
h = _resource.host_groups[rk]
elif rk in _resource.hosts.keys():
h = _resource.hosts[rk]
if h is None or \
not h.is_available() or \
rk not in self.datacenter.resources.keys():
del _rdatacenter.resources[rk]
updated = True
self.logger.info("datacenter updated (resource removed)")
return updated
def _is_host_group_updated(self, _hg, _resource):
"""Check if host_group's parent or children are changed."""
updated = False
_rhg = _resource.host_groups[_hg.name]
if _hg.host_type != _rhg.host_type:
_rhg.host_type = _hg.host_type
updated = True
self.logger.info("host_group (" + _rhg.name + ") updated (hosting type)")
if _rhg.parent_resource is None or \
_rhg.parent_resource.name != _hg.parent_resource.name:
if _hg.parent_resource.name in _resource.host_groups.keys():
hg = _resource.host_groups[_hg.parent_resource.name]
if hg.is_available():
_rhg.parent_resource = hg
updated = True
elif _hg.parent_resource.name == _resource.datacenter.name:
_rhg.parent_resource = _resource.datacenter
updated = True
if updated:
self.logger.info("host_group (" + _rhg.name + ") updated (parent host_group)")
for rk in _hg.child_resources.keys():
h = None
if rk in _resource.hosts.keys():
h = _resource.hosts[rk]
elif rk in _resource.host_groups.keys():
h = _resource.host_groups[rk]
if h is not None and h.is_available():
if rk not in _rhg.child_resources.keys() or h.updated:
_rhg.child_resources[rk] = h
updated = True
self.logger.info("host_group (" + _rhg.name + ") updated (new child host)")
for rk in _rhg.child_resources.keys():
h = None
if rk in _resource.hosts.keys():
h = _resource.hosts[rk]
elif rk in _resource.host_groups.keys():
h = _resource.host_groups[rk]
if h is None or \
not h.is_available() or \
rk not in _hg.child_resources.keys():
del _rhg.child_resources[rk]
updated = True
self.logger.info("host_group (" + _rhg.name + ") updated (child host removed)")
return updated
def _is_host_updated(self, _host, _resource):
"""Check if host's parent (e.g., rack) is changed."""
updated = False
_rhost = _resource.hosts[_host.name]
if _rhost.host_group is None or \
_rhost.host_group.name != _host.host_group.name:
if _host.host_group.name in _resource.host_groups.keys():
rhost_group = _resource.host_groups[_host.host_group.name]
if rhost_group.is_available():
_rhost.host_group = rhost_group
updated = True
elif _host.host_group.name == _resource.datacenter.name:
_rhost.host_group = _resource.datacenter
updated = True
if updated:
self.logger.info("host (" + _rhost.name + ") updated (host_group)")
return False
|