6bb1fd776f
All Python files, except executables, should have a '.py' extension. This wasn't being done for files in the 'plugins/xenserver' folder, likely because it seems unnatural to call a "plugin" with a file extension. Begin working towards a resolution for this by renaming all files to include a '.py' extension. To avoid forcing operators to upgrade the Nova service and per-host plugins at the same time, continue to reference the old, non-'.py' filenames, using symlinks to ensure the references continue to work. Once Ocata has been released, these symlinks can be removed, the API version updated and the reference updated to include the '.py' extension. Change-Id: Icf4cf2424c15276a6c01778fb92f76bbdc9b2068 Closes-bug: #1302831
65 lines
1.9 KiB
Python
Executable File
65 lines
1.9 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2012 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# NOTE: XenServer still only supports Python 2.4 in it's dom0 userspace
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# which means the Nova xenapi plugins must use only Python 2.4 features
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"""Fetch Bandwidth data from VIF network devices."""
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import utils
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import pluginlib_nova
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import re
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pluginlib_nova.configure_logging('bandwidth')
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def _read_proc_net():
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f = open('/proc/net/dev', 'r')
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try:
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return f.readlines()
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finally:
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f.close()
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def _get_bandwitdth_from_proc():
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devs = [l.strip() for l in _read_proc_net()]
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# ignore headers
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devs = devs[2:]
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vif_pattern = re.compile("^vif(\d+)\.(\d+)")
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dlist = [d.split(':', 1) for d in devs if vif_pattern.match(d)]
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devmap = dict()
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for name, stats in dlist:
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slist = stats.split()
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dom, vifnum = name[3:].split('.', 1)
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dev = devmap.get(dom, {})
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# Note, we deliberately swap in and out, as instance traffic
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# shows up inverted due to going though the bridge. (mdragon)
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dev[vifnum] = dict(bw_in=int(slist[8]), bw_out=int(slist[0]))
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devmap[dom] = dev
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return devmap
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def fetch_all_bandwidth(session):
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return _get_bandwitdth_from_proc()
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if __name__ == '__main__':
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utils.register_plugin_calls(fetch_all_bandwidth)
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