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#!/usr/bin/env python3
# coding: utf-8
#
# Ceph - scalable distributed file system
#
# Copyright (C) 2017 OVH
# Copyright (C) 2020 Marc Schöchlin <ms-github@256bit.org>
#
# This is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public
# License version 2, as published by the Free Software
# Foundation. See file COPYING.
#
import json
import subprocess
import time
import os
import argparse
import glob
import sys
import textwrap
import datetime
def shorten(val):
if isinstance(val, str):
return val
for u in ((3, ''), (6, 'k'), (9, 'M'), (12, 'G'), (15, 'T')):
if val < 10**u[0]:
return "{}{}".format(int(val / (10 ** (u[0]-3))), u[1])
return val
def create_histogram(sockets, counter, last, seconds, batch):
current_datasets = {}
json_d = {}
for socket in sockets:
try:
out = subprocess.check_output(
"ceph --admin-daemon {} perf histogram dump".format(socket),
shell=True)
json_d = json.loads(out.decode('utf-8'))
except Exception as e:
return (last,
"Couldn't connect to admin socket, result: \n{}".format(e))
current_datasets[socket] = json_d['osd'][counter]['values']
axes = json_d['osd'][counter]['axes']
if batch:
content = "{} : Counter: {} for {}\n\n\n".format(
datetime.datetime.now().isoformat(), counter,", ".join(sockets))
else:
content = "Counter: {} for {}\n(create statistics every {} seconds)\n\n".format(
counter,", ".join(sockets),seconds)
content += "{}:\n".format(axes[1]['name'])
for r in axes[1]['ranges']:
content += "{0: >4} ".format(
shorten(r['min']) if 'min' in r else '')
content += "\n"
for r in axes[1]['ranges']:
content += "{0: >4} ".format(
shorten(r['max']) if 'max' in r else '')
content += "\n"
content += ("{0: >"+str(len(axes[1]['ranges'])*5+14)+"}:\n").format(
axes[0]['name'])
if batch:
COL = ''
ENDC = ''
else:
COL = '\033[91m'
ENDC = '\033[0m'
current = []
# initalize with zeros
for i in range(len(current_datasets[socket])):
current.append([])
for j in range(len(current_datasets[socket][i])):
current[i].append(0)
# combine data
for socket, data in current_datasets.items():
for i in range(len(data)):
for j in range(len(data[i])):
current[i][j] += data[i][j]
for i in range(len(current)):
for j in range(len(current[i])):
try:
diff = current[i][j] - last[i][j]
except IndexError:
diff = '-'
if diff != "-" and diff != 0:
content += "{0}{1: >4}{2} ".format(COL,shorten(diff),ENDC)
else:
content += "{0: >4} ".format(shorten(diff))
r = axes[0]['ranges'][i]
content += "{0: >6} : {1}\n".format(
shorten(r['min']) if 'min' in r else '',
shorten(r['max']) if 'max' in r else '')
return (current, content)
def loop_print(sockets, counter, loop_seconds, batch):
last = []
try:
while True:
last, content = create_histogram(sockets, counter, last, loop_seconds, batch)
if not batch:
print(chr(27) + "[2J")
print(content)
time.sleep(loop_seconds)
except KeyboardInterrupt:
print("...interupted")
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
description='Continuously display ceph performance histogram for selected osd operations')
parser.add_argument(
'--asok',
type=str,
default=['/var/run/ceph/*.asok'],
nargs='+',
help='Path to asok file, you can use wildcards')
parser.add_argument(
'--counter',
type=str,
help=textwrap.dedent('''\
Specify name of the counter to calculate statistics
see "ceph --admin-daemon /var/run/ceph/<osd>.asok perf histogram dump"
'''),
default='op_w_latency_in_bytes_histogram')
parser.add_argument(
'--batch',
help='Disable colors and add timestamps',
action='store_true',
)
parser.add_argument(
'--loop_seconds',
type=int,
help='Cycle time in seconds for statistics generation',
default=5)
args = parser.parse_args()
if not sys.stdout.isatty():
print("Not running with a tty, automatically switching to batch mode")
args.batch = True
sockets = []
for asok in args.asok:
sockets = glob.glob(asok) + sockets
if len(sockets) == 0:
print("no suitable socket at {}".format(args.asok))
sys.exit(1)
loop_print(sockets, args.counter, args.loop_seconds, args.batch)
if __name__ == '__main__':
main()
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