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monitoring.py
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monitoring.py
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from contextlib import contextmanager
import glob
import os.path
import common
import settings
import logging
logger = logging.getLogger("cbt")
class Monitoring(object):
def __init__(self, mconfig):
# the initializers should be the very single places interrogating
# settings for the sake of explicitness
nodes_list = mconfig.get('nodes', self._get_default_nodes())
self.nodes = settings.getnodes(*nodes_list)
@staticmethod
def _get_all():
for monitoring, mconfig in sorted(settings.monitoring_profiles.items()):
yield Monitoring._get_object(monitoring, mconfig)
@staticmethod
def _get_object(monitoring, mconfig):
if monitoring == 'collectl':
return CollectlMonitoring(mconfig)
if monitoring == 'perf':
return PerfMonitoring(mconfig)
if monitoring == 'blktrace':
return BlktraceMonitoring(mconfig)
class CollectlMonitoring(Monitoring):
def __init__(self, mconfig):
super(CollectlMonitoring, self).__init__(mconfig)
self.args = mconfig.get('args', '-s+mYZ -i 1:10 -F0 -f {collectl_dir} '
r'--rawdskfilt \"+cciss/c\d+d\d+ |hd[ab] | sd[a-z]+ |dm-\d+ |xvd[a-z] |fio[a-z]+ | vd[a-z]+ |emcpower[a-z]+ |psv\d+ |nvme[0-9]n[0-9]+p[0-9]+ \"')
def start(self, directory):
collectl_dir = '%s/collectl' % directory
common.pdsh(self.nodes, 'mkdir -p -m0755 -- %s' % collectl_dir).communicate()
common.pdsh(self.nodes, ['collectl', self.args.format(collectl_dir=collectl_dir)])
def stop(self, directory):
common.pdsh(self.nodes, 'pkill -SIGINT -f collectl').communicate()
@staticmethod
def _get_default_nodes():
return ['clients', 'osds', 'mons', 'rgws']
class PerfMonitoring(Monitoring):
def __init__(self, mconfig):
super(PerfMonitoring, self).__init__(mconfig)
self.pid_dir = settings.cluster.get('pid_dir')
self.pid_glob = mconfig.get('pid_glob', 'osd.*.pid')
self.user = settings.cluster.get('user')
self.perf_cmd = mconfig.get('perf_cmd', 'sudo perf')
self.args_template = mconfig.get('args')
self.perf_runners = []
self.perf_dir = '' # we need the output file to extract data
def start(self, directory):
perf_dir = '%s/perf' % directory
self.perf_dir = perf_dir
common.pdsh(self.nodes, 'mkdir -p -m0755 -- %s' % perf_dir).communicate()
perf_template = '{} {} &'.format(self.perf_cmd, self.args_template)
local_node = common.get_localnode(self.nodes)
if local_node:
logger.debug("PerfMonitoring: in local_node");
logger.debug("pid_dir: %s" % self.pid_dir);
for pid_path in glob.glob(os.path.join(self.pid_dir, self.pid_glob)):
logger.debug("PerfMonitoring pid_path: %s" % pid_path);
with open(pid_path) as pidfile:
pid = pidfile.read().strip()
perf_cmd = perf_template.format(perf_dir=perf_dir, pid=pid)
runner = common.sh(local_node, perf_cmd)
self.perf_runners.append(runner)
else:
logger.debug("PerfMonitoring: remote_node");
# ${pid} will be handled by remote's sh
perf_cmd = perf_template.format(perf_dir=perf_dir, pid='${pid}')
common.pdsh(self.nodes, ['for pid in `cat %s/%s`;' % (self.pid_dir, self.pid_glob),
'do', perf_cmd,
'done'])
def stop(self, directory):
if self.perf_runners:
for runner in self.perf_runners:
runner.kill()
else:
common.pdsh(self.nodes, 'sudo pkill -SIGINT -f perf\ ').communicate()
if directory:
common.pdsh(self.nodes, 'sudo chown {user}.{user} {dir}/perf/perf.data'.format(
user=self.user, dir=directory))
common.pdsh(self.nodes, 'sudo chown {user}.{user} {dir}/perf/perf_stat.*'.format(
user=self.user, dir=directory))
def get_cpu_cycles(self, out_dir):
import re
total_cpu_cycles = 0
perf_dir_name = str(glob.glob(out_dir + "/perf*")[0])
perf_stat_fnames = os.listdir(perf_dir_name)
for perf_out_fname in perf_stat_fnames:
perf_output_file = open(perf_dir_name + "/" + perf_out_fname, "rt")
match = re.search(r'(.*) cycles(.*?) .*', perf_output_file.read(), re.M | re.I)
if match:
cpu_cycles = match.group(1).strip()
else:
return None
total_cpu_cycles = total_cpu_cycles + int(cpu_cycles.replace(',', ''))
return total_cpu_cycles
@staticmethod
def _get_default_nodes():
return ['osds']
class BlktraceMonitoring(Monitoring):
def __init__(self, mconfig):
super(BlktraceMonitoring, self).__init__(mconfig)
self.osds_per_node = settings.cluster.get('osds_per_node')
self.use_existing = settings.cluster.get('use_existing', True)
self.user = settings.cluster.get('user')
def start(self, directory):
blktrace_dir = '%s/blktrace' % directory
common.pdsh(self.nodes, 'mkdir -p -m0755 -- %s' % blktrace_dir).communicate()
for device in range(0, self.osds_per_node):
common.pdsh(self.nodes, 'cd %s;sudo blktrace -o device%s -d /dev/disk/by-partlabel/osd-device-%s-data'
% (blktrace_dir, device, device))
def stop(self, directory):
common.pdsh(self.nodes, 'sudo pkill -SIGINT -f blktrace').communicate()
if directory and not self.use_existing:
self._make_movies(directory)
def _make_movies(self, directory):
seekwatcher = '/home/%s/bin/seekwatcher' % self.user
blktrace_dir = '%s/blktrace' % directory
for device in range(self.osds_per_node):
common.pdsh(self.nodes, 'cd %s;%s -t device%s -o device%s.mpg --movie' %
(blktrace_dir, seekwatcher, device, device)).communicate()
@staticmethod
def _get_default_nodes():
return ['osds']
def start(directory):
for m in Monitoring._get_all():
m.start(directory)
def stop(directory=None):
for m in Monitoring._get_all():
m.stop(directory)
@contextmanager
def monitor(directory):
monitors = []
for m in Monitoring._get_all():
m.start(directory)
monitors.append(m)
yield
for m in monitors:
m.stop(directory)
def get_cpu_cycles(out_dir):
# check if perf stat is configured
for monitoring_profile in Monitoring._get_all():
if(isinstance(monitoring_profile, PerfMonitoring)):
return monitoring_profile.get_cpu_cycles(out_dir) # if it is, then return the number of cycle
return None