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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