virt_who_stats.py

#!/bin/python
# Amador Pahim <apahim AT redhat DOT com>

import sys
import json

try:
    logfile = sys.argv[1]
except:
    logfile = '/var/log/rhsm/rhsm.log'

in_section = False
with open(logfile, 'r') as f:
    for line in f:
        if in_section:
            section.append(line)

        if 'hosts-to-guests mapping' in line.strip():
            section = []
            in_section = True
            timestamp = "%s %s" % (line.split()[0], line.split()[1])
            section.append('{')
            
        if in_section and line == '}\n':
            in_section = False
            host_guest_map = json.loads("".join(section))
            section = []

            print(timestamp)
            for host in host_guest_map:
                print(" - Host: %s -> %s VMs" % (host,
                                              len(host_guest_map[host])))