Redis statistics extractor for collectd exec plugin

redis-info.py

#!/opt/rh/rh-python36/root/usr/bin/python3 -u

from redis import Redis
from os import getenv
from platform import node
from time import sleep

hostname = getenv('COLLECTD_HOSTNAME', default=node())
interval = int(float(getenv('COLLECTD_INTERVAL', default=60)))

r = Redis(host='localhost', port=6379, db=0, password='some_secret')

required_items = {
    'connected_clients': 'memcached_connections-clients',
    'used_memory': 'memory',
    'instantaneous_ops_per_sec': 'memcached_ops'
}

while True:
    info_data = r.info()
    for item, value in info_data.items():
        if item in required_items:
            print('PUTVAL "{}/redis/{}" interval={} N:{}'.format(
                hostname, required_items[item], interval, value
            ), flush=True)
    sleep(interval)