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get-stats.py
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executable file
·220 lines (181 loc) · 6.79 KB
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#!/usr/bin/python3
import argparse
import csv
import datetime
import glob
import itertools
import json
import logging
import os
import re
import socket
import subprocess
import sys
try:
import psutil
except ImportError:
psutil = None
print('No psutil, process information will not be included',
file=sys.stderr)
try:
import pymysql
except ImportError:
pymysql = None
print('No pymysql, database information will not be included',
file=sys.stderr)
LOG = logging.getLogger('perf')
# https://www.elastic.co/blog/found-crash-elasticsearch#mapping-explosion
def tryint(value):
try:
return int(value)
except (ValueError, TypeError):
return value
def get_service_stats(service):
stats = {'MemoryCurrent': 0}
output = subprocess.check_output(['/usr/bin/systemctl', 'show', service] +
['-p%s' % stat for stat in stats])
for line in output.decode().split('\n'):
if not line:
continue
stat, val = line.split('=')
stats[stat] = tryint(val)
return stats
def get_services_stats():
services = [os.path.basename(s) for s in
glob.glob('/etc/systemd/system/devstack@*.service')] + \
['apache2.service']
return [dict(service=service, **get_service_stats(service))
for service in services]
def get_process_stats(proc):
cmdline = proc.cmdline()
if 'python' in cmdline[0]:
cmdline = cmdline[1:]
return {'cmd': cmdline[0],
'pid': proc.pid,
'args': ' '.join(cmdline[1:]),
'rss': proc.memory_info().rss}
def get_processes_stats(matches):
me = os.getpid()
procs = psutil.process_iter()
def proc_matches(proc):
return me != proc.pid and any(
re.search(match, ' '.join(proc.cmdline()))
for match in matches)
return [
get_process_stats(proc)
for proc in procs
if proc_matches(proc)]
def get_db_stats(host, user, passwd):
dbs = []
try:
db = pymysql.connect(host=host, user=user, password=passwd,
database='stats',
cursorclass=pymysql.cursors.DictCursor)
except pymysql.err.OperationalError as e:
if 'Unknown database' in str(e):
print('No stats database; assuming devstack failed',
file=sys.stderr)
return []
raise
with db:
with db.cursor() as cur:
cur.execute('SELECT db,op,count FROM queries')
for row in cur:
dbs.append({k: tryint(v) for k, v in row.items()})
return dbs
def get_http_stats_for_log(logfile):
stats = {}
apache_fields = ('host', 'a', 'b', 'date', 'tz', 'request', 'status',
'length', 'c', 'agent')
ignore_agents = ('curl', 'uwsgi', 'nova-status')
ignored_services = set()
for line in csv.reader(open(logfile), delimiter=' '):
fields = dict(zip(apache_fields, line))
if len(fields) != len(apache_fields):
# Not a combined access log, so we can bail completely
return []
try:
method, url, http = fields['request'].split(' ')
except ValueError:
method = url = http = ''
if 'HTTP' not in http:
# Not a combined access log, so we can bail completely
return []
# Tempest's User-Agent is unchanged, but client libraries and
# inter-service API calls use proper strings. So assume
# 'python-urllib' is tempest so we can tell it apart.
if 'python-urllib' in fields['agent'].lower():
agent = 'tempest'
else:
agent = fields['agent'].split(' ')[0]
if agent.startswith('python-'):
agent = agent.replace('python-', '')
if '/' in agent:
agent = agent.split('/')[0]
if agent in ignore_agents:
continue
try:
service, rest = url.strip('/').split('/', 1)
except ValueError:
# Root calls like "GET /identity"
service = url.strip('/')
rest = ''
if not service.isalpha():
ignored_services.add(service)
continue
method_key = '%s-%s' % (agent, method)
try:
length = int(fields['length'])
except ValueError:
LOG.warning('[%s] Failed to parse length %r from line %r' % (
logfile, fields['length'], line))
length = 0
stats.setdefault(service, {'largest': 0})
stats[service].setdefault(method_key, 0)
stats[service][method_key] += 1
stats[service]['largest'] = max(stats[service]['largest'],
length)
if ignored_services:
LOG.warning('Ignored services: %s' % ','.join(
sorted(ignored_services)))
# Flatten this for ES
return [{'service': service, 'log': os.path.basename(logfile),
**vals}
for service, vals in stats.items()]
def get_http_stats(logfiles):
return list(itertools.chain.from_iterable(get_http_stats_for_log(log)
for log in logfiles))
def get_report_info():
return {
'timestamp': datetime.datetime.now().isoformat(),
'hostname': socket.gethostname(),
'version': 2,
}
if __name__ == '__main__':
process_defaults = ['privsep', 'mysqld', 'erlang', 'etcd']
parser = argparse.ArgumentParser()
parser.add_argument('--db-user', default='root',
help=('MySQL user for collecting stats '
'(default: "root")'))
parser.add_argument('--db-pass', default=None,
help='MySQL password for db-user')
parser.add_argument('--db-host', default='localhost',
help='MySQL hostname')
parser.add_argument('--apache-log', action='append', default=[],
help='Collect API call stats from this apache log')
parser.add_argument('--process', action='append',
default=process_defaults,
help=('Include process stats for this cmdline regex '
'(default is %s)' % ','.join(process_defaults)))
args = parser.parse_args()
logging.basicConfig(level=logging.WARNING)
data = {
'services': get_services_stats(),
'db': pymysql and args.db_pass and get_db_stats(args.db_host,
args.db_user,
args.db_pass) or [],
'processes': psutil and get_processes_stats(args.process) or [],
'api': get_http_stats(args.apache_log),
'report': get_report_info(),
}
print(json.dumps(data, indent=2))