#!/usr/bin/python

from xen.xm.main import SERVER_LEGACY_XMLRPC, SERVER_XEN_API, parseServer
from xen.xend import sxp

serverType, serverURI = parseServer()

if serverType == SERVER_XEN_API:
    from xen.xm import XenAPI
    server = XenAPI.Session(serverURI)
    username, password = parseAuthentication()
    server.login_with_password(username, password)
    def logout():
        try:
            server.xenapi.session.logout()
        except:
            pass
    atexit.register(logout)
else:
    from xen.util.xmlrpcclient import ServerProxy
    server = ServerProxy(serverURI)

import sys

if len(sys.argv) > 1:
    cmd = sys.argv[1]
else:
    cmd = None

def getDomains():
    ret = {}
    if serverType == SERVER_XEN_API:
        domains = server.xenapu.VM.get_all_records()
        metrics = server.xenapi.VM_metrics.get_all_records()
        for d in domains.values():
            ret[d['uuid'].replace('-', '_')] = {'name': d['name_label'],
                                                'cpu_time': sum(metrics[d['metrics']]['VCPUs_utilisation'].values()),
                                                'domid': d['domid'],
                                                }
        return ret
    else:
        domains = server.xend.domains_with_state(True, 'all', True)
        for d in domains:
            ret[sxp.child_value(d, 'uuid', 'NONE').replace('-', '_')] = {'name': sxp.child_value(d, 'name', 'UNKNOWN'),
                                                                         'cpu_time': sxp.child_value(d, 'cpu_time', 0.0),
                                                                         'domid': sxp.child_value(d, 'domid', -1),
                                                                         }
        return ret

if cmd == 'config':
    print """
graph_title Xen domain CPU usage
graph_args --base 1000 -r --lower-limit 0 --upper-limit 800
graph_vlabel %
graph_scale no
graph_info This graph shows how CPU time is spent by Xen domains.
graph_category system
graph_period second"""
    domains = getDomains()
    for d in sorted(domains):
        name = domains[d]['name']
        if name[0:2] == 'd_':
            name = 'user domain'
        print "%s.label %s" % (d, name)
        if domains[d]['domid'] == 0:
            print "%s.draw AREA" % d
        else:
            print "%s.draw STACK" % d
        print "%s.max 5000" % d
        print "%s.min 0" % d
        print "%s.type DERIVE" % d
        print "%s.info %s" % (d, name)
    sys.exit(0)

domains = getDomains()
for d in sorted(domains):
    print "%s.value %s" % (d, domains[d]['cpu_time'])