93 lines
2.4 KiB
Python
Executable File
93 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python
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# Get count of available slaves.
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# Copyright (C) 2011 OpenStack LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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#
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import vmdatabase
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import os
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import sys
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import getopt
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def main(threshold, stat_file):
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db = vmdatabase.VMDatabase()
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ready = vmdatabase.READY
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ready_nodes = []
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for provider in db.getProviders():
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for base_image in provider.base_images:
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ready_nodes = [x for x in base_image.machines if x.state == ready]
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ready_count = len(ready_nodes)
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set_vm_state(ready_count, stat_file)
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print "Number of slaves available: %s\n" % ready_count
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if ready_count < threshold:
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sys.exit(1)
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def set_vm_state(count, stat_file):
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try:
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w_fh = open(stat_file, 'w')
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w_fh.write("slaves\n%s\n" % count)
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w_fh.close()
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except IOError, err:
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print >>sys.stderr, "warning: unable to update stat file: %s" % err
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def usage(msg=None):
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if msg:
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stream = sys.stderr
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else:
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stream = sys.stdout
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stream.write("usage: %s [-h] -t threshold [-f stat-file]\n"
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% os.path.basename(sys.argv[0]))
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if msg:
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stream.write("\nERROR: " + msg + "\n")
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exitCode = 1
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else:
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exitCode = 0
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sys.exit(exitCode)
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if __name__ == '__main__':
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try:
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opts = getopt.getopt(sys.argv[1:], 'ht:f:')[0]
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except getopt.GetoptError:
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usage('invalid option selected')
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threshold = None
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stat_file = None
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for opt, value in opts:
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if (opt in ('-h')):
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usage()
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elif (opt in ('-f')):
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stat_file = value
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elif (opt in ('-t')):
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threshold = value
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if not threshold:
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usage('please specify threshold')
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try:
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threshold = int(threshold)
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except TypeError, err:
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usage('invalid threshold specified')
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if not stat_file:
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stat_file = os.path.expanduser('~/vm-threshold.txt')
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main(threshold, stat_file)
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