CloudStack: pretty table of instance load information.

cs_load_stats.py

#!/usr/bin/python
# usage: cs listVirtualMachines | ./load_stats.py

import json
import sys

vms = json.load(sys.stdin)

if vms.get('count', 0) > 0:
    output = list()
    for vm in vms['virtualmachine']:
        output.append('{}\t{}\t{}\t{: 6.2f}%'.format(vm['name'], vm['cpunumber'], vm['memory'], float(vm['cpuused'][0:-1])))
    print('name\tno cpu\tmem\tload')
    for line in sorted(output):
        print(line)