Send Ceph pool statistics to Graphite

ceph-graphite-pool-stats.py

#!/usr/bin/env python

'''
This script gathers pool statistics from RADOS and sends them to a Graphite server

It allows you to graph and see what each pool is doing.

Author: Wido den Hollander <wido@widodh.nl>
'''

import time
import socket
import rados

GRAPHITE = ('graphite.mydomain.tld', 2003)
CEPH_CONF = '/etc/ceph/ceph.conf'

PREFIX = 'ceph'

def send_over_socket(destination, key, value, timestamp):
    sock = socket.create_connection(destination)
    sock.send("%s %0.3f %d\n" % (key, value, timestamp))
    sock.close()

def gather_pool_statistics(ceph_conf):
    r = rados.Rados(conffile=ceph_conf)

    r.connect()

    pools = r.list_pools()

    now = int(time.time())

    for pool in pools:
        io = r.open_ioctx(pool)
        pool_stats = io.get_stats()
        io.close()

        # Due to dot (.) at beginning of RGW pools
        pool = pool.lstrip(".")

        for key in pool_stats.keys():
            name = "%s.pool.%s.%s" % (PREFIX, pool, key)
            print "%s:%0.3f" % (name, pool_stats[key])
            send_over_socket(GRAPHITE, name, pool_stats[key], now)
            # Graphite doesn't seem happy if you flood it
            time.sleep(0.1)

    r.shutdown()

if __name__ == '__main__':
    gather_pool_statistics(CEPH_CONF)