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confluent/confluent_client/bin/nodeping
2022-06-02 16:04:19 -04:00

141 lines
5.0 KiB
Python
Executable File

#!/usr/bin/python2
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2016-2017 Lenovo
#
# 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.
from collections import deque
import optparse
import os
import select
import signal
import subprocess
import sys
try:
signal.signal(signal.SIGPIPE, signal.SIG_DFL)
except AttributeError:
pass
path = os.path.dirname(os.path.realpath(__file__))
path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
if path.startswith('/opt'):
sys.path.append(path)
import confluent.client as client
import confluent.sortutil as sortutil
def run():
argparser = optparse.OptionParser(
usage="Usage: %prog [options] noderange")
argparser.add_option('-f', '-c', '--count', type='int', default=168,
help='Number of commands to run at a time')
argparser.add_option('-s', '--substitutename',
help='Use a different name other than the nodename for ping, with {}, it is the entire name evaluated as an expression, otherwise it is used as a suffix')
# among other things, FD_SETSIZE limits. Besides, spawning too many
# processes can be unkind for the unaware on memory pressure and such...
(options, args) = argparser.parse_args()
if len(args) < 1:
argparser.print_help()
sys.exit(1)
client.check_globbing(args[0])
concurrentprocs = options.count
c = client.Command()
currprocs = 0
all = set([])
pipedesc = {}
pendingexecs = deque()
exitcode = 0
nodemap = {}
if options.substitutename:
subname = options.substitutename
if '{' not in subname:
subname = '{node}' + subname
for exp in c.create('/noderange/{0}/attributes/expression'.format(args[0]),
{'expression': subname}):
if 'error' in exp:
sys.stderr.write(exp['error'] + '\n')
exitcode |= exp.get('errorcode', 1)
ex = exp.get('databynode', ())
for node in ex:
nodemap[node] = ex[node]['value']
for rsp in c.read('/noderange/{0}/nodes/'.format(args[0])):
if 'error' in rsp:
sys.stderr.write(rsp['error'] + '\n')
exitcode |= rsp.get('errorcode', 1)
if rsp.get('item', {}).get('href', None):
node = rsp['item']['href'][:-1]
pingnode = nodemap.get(node, node)
cmdv = ['ping', '-c', '1', '-W', '1', pingnode]
if currprocs < concurrentprocs:
currprocs += 1
run_cmdv(pingnode, cmdv, all, pipedesc)
else:
pendingexecs.append((pingnode, cmdv))
if not all or exitcode:
sys.exit(exitcode)
rdy, _, _ = select.select(all, [], [], 10)
while all:
pernodeout = {}
for r in rdy:
desc = pipedesc[r]
node = desc['node']
data = True
while data and select.select([r], [], [], 0)[0]:
data = r.readline()
if not data:
pop = desc['popen']
ret = pop.poll()
if ret is not None:
exitcode = exitcode | ret
all.discard(r)
r.close()
if desc['type'] == 'stdout':
if ret:
print('{0}: no_ping'.format(node))
else:
print('{0}: ping'.format(node))
if pendingexecs:
node, cmdv = pendingexecs.popleft()
run_cmdv(node, cmdv, all, pipedesc)
for node in sortutil.natural_sort(pernodeout):
for line in pernodeout[node]:
line = client.stringify(line)
if options.nonodeprefix:
sys.stdout.write(line)
else:
sys.stdout.write('{0}: {1}'.format(node, line))
sys.stdout.flush()
if all:
rdy, _, _ = select.select(all, [], [], 10)
sys.exit(exitcode)
def run_cmdv(node, cmdv, all, pipedesc):
nopen = subprocess.Popen(
cmdv, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
pipedesc[nopen.stdout] = {'node': node, 'popen': nopen,
'type': 'stdout'}
pipedesc[nopen.stderr] = {'node': node, 'popen': nopen,
'type': 'stderr'}
all.add(nopen.stdout)
all.add(nopen.stderr)
if __name__ == '__main__':
run()