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#!/usr/bin/env python
# usage: xc_dom_control [command] <params>
#
# this script isn't very smart, but it'll do for now.
#
def usage ():
print >>sys.stderr, """
Usage: %s [command] <params>
stop [dom] -- pause a domain
start [dom] -- un-pause a domain
shutdown [dom] [[-w]] -- request a domain to shutdown (can specify 'all')
(optionally wait for complete shutdown)
destroy [dom] -- immediately terminate a domain
pincpu [dom] [cpu] -- pin a domain to the specified CPU
suspend [dom] [file] -- write domain's memory to a file and terminate
(resume by re-running xc_dom_create with -L option)
unwatch [dom] -- kill the auto-restart daemon for a domain
list -- print info about all domains
listvbds -- print info about all virtual block devs
cpu_bvtset [dom] [mcuadv] [warp] [warpl] [warpu]
-- set BVT scheduling parameters for domain
cpu_bvtslice [slice] -- set default BVT scheduler slice
cpu_atropos_set [dom] [period] [slice] [latency] [xtratime]
-- set Atropos scheduling parameters for domain
cpu_rrobin_slice [slice] -- set Round Robin scheduler slice
vif_stats [dom] [vif] -- get stats for a given network vif
vif_addip [dom] [vif] [ip] -- add an IP address to a given vif
vif_setsched [dom] [vif] [bytes] [usecs] -- rate limit vif bandwidth
vif_getsched [dom] [vif] -- print vif's scheduling parameters
vbd_add [dom] [uname] [dev] [mode] -- make disk/partition uname available to
domain as dev e.g. 'vbd_add 2 phy:sda3 hda1 w'
vbd_remove [dom] [dev] -- remove disk or partition attached as 'dev'
""" % sys.argv[0]
import Xc, sys, re, string, time, os, signal
if len(sys.argv) < 2:
usage()
sys.exit(-1)
cmd = sys.argv[1]
xc = Xc.new()
rc = ''
dom = None
if len( sys.argv ) > 2 and re.match('\d+$', sys.argv[2]):
dom = long(sys.argv[2])
if cmd == 'stop':
rc = xc.domain_stop( dom=dom )
elif cmd == 'start':
rc = xc.domain_start( dom=dom )
elif cmd == 'shutdown':
list = []
if dom != None:
rc = xc.domain_destroy( dom=dom, force=0 )
list.append(dom)
elif sys.argv[2] == 'all':
for i in xc.domain_getinfo():
if i['dom'] != 0: # don't shutdown dom0!
ret = xc.domain_destroy( dom=i['dom'], force=0 )
if ret !=0: rc = ret
else: list.append(i['dom'])
if len(sys.argv) == 4 and sys.argv[3] == "-w":
# wait for all domains we shut down to terminate
for dom in list:
while True:
info = xc.domain_getinfo(dom,1)
if not ( info != [] and info[0]['dom'] == dom ): break
time.sleep(1)
elif cmd == 'destroy':
rc = xc.domain_destroy( dom=dom, force=1 )
elif cmd == 'pincpu':
if len(sys.argv) < 4:
usage()
sys.exit(-1)
cpu = int(sys.argv[3])
rc = xc.domain_pincpu( dom, cpu )
elif cmd == 'list':
print 'Dom Name Mem(kb) CPU State Time(s)'
for domain in xc.domain_getinfo():
run = (domain['running'] and 'r') or '-' # domain['running'] ? run='r' : run='-'
stop = (domain['stopped'] and 's') or '-' # domain['stopped'] ? stop='s': stop='-'
domain['state'] = run + stop
domain['cpu_time'] = domain['cpu_time']/1e8
print "%(dom)-4d %(name)-16s %(mem_kb)7d %(cpu)3d %(state)5s %(cpu_time)8d" % domain
elif cmd == 'unwatch':
# the auto-restart daemon's pid file
watcher = '/var/run/xendomains/%d.pid' % dom
if os.path.isfile(watcher):
fd = open(watcher,'r')
pid = int(fd.readline())
os.kill(pid, signal.SIGTERM)
elif cmd == 'listvbds':
print 'Dom Dev Perm Size(MB)'
for vbd in xc.vbd_probe():
vbd['size_mb'] = vbd['nr_sectors'] / 2048
vbd['perm'] = (vbd['writeable'] and 'w') or 'r'
print '%(dom)-4d %(vbd)04x %(perm)-1s %(size_mb)d' % vbd
elif cmd == 'suspend':
if len(sys.argv) < 4:
usage()
sys.exit(-1)
file = sys.argv[3]
# the auto-restart daemon's pid file
watcher = '/var/run/xendomains/%d.pid' % dom
if os.path.isfile(watcher):
fd = open(watcher,'r')
pid = int(fd.readline())
os.kill(pid, signal.SIGTERM)
xc.domain_stop( dom=dom )
rc = xc.linux_save( dom=dom, state_file=file, progress=1)
if rc == 0 : xc.domain_destroy( dom=dom, force=1 )
elif cmd == 'cpu_bvtslice':
if len(sys.argv) < 3:
usage()
sys.exit(-1)
slice = dom # first int argument is in "dom" (!)
rc = xc.bvtsched_global_set(ctx_allow=slice)
elif cmd == 'cpu_bvtset':
if len(sys.argv) < 7:
usage()
sys.exit(-1)
mcuadv = int(sys.argv[3])
warp = int(sys.argv[4])
warpl = int(sys.argv[5])
warpu = int(sys.argv[6])
rc = xc.bvtsched_domain_set(dom=dom, mcuadv=mcuadv, warp=warp,
warpl=warpl, warpu=warpu)
elif cmd == 'vif_stats':
if len(sys.argv) < 4:
usage()
sys.exit(-1)
vif = int(sys.argv[3])
print xc.vif_stats_get(dom=dom, vif=vif)
elif cmd == 'vif_addip':
if len(sys.argv) < 5:
usage()
sys.exit(-1)
vif = int(sys.argv[3])
ip = sys.argv[4]
# XXX This function should be moved to Xc once we sort out the VFR
import xenctl.utils
xenctl.utils.setup_vfr_rules_for_vif( dom, vif, ip )
elif cmd == 'vif_setsched':
if len(sys.argv) < 6:
usage()
sys.exit(-1)
vif = int(sys.argv[3])
credit_bytes = int(sys.argv[4])
credit_usecs = int(sys.argv[5])
rc = xc.xc_vif_scheduler_set(dom=dom, vif=vif,
credit_bytes=credit_bytes,
credit_usecs=credit_usecs)
elif cmd == 'vif_getsched':
if len(sys.argv) < 4:
usage()
sys.exit(-1)
vif = int(sys.argv[3])
print xc.vif_scheduler_get(dom=dom, vif=vif)
elif cmd == 'vbd_add':
import xenctl.utils
xenctl.utils.VBD_EXPERT_LEVEL = 0 # sets the allowed level of potentially unsafe mappings
if len(sys.argv) < 6:
usage()
sys.exit(1)
uname = sys.argv[3]
dev = sys.argv[4]
mode = sys.argv[5]
writeable = 0
if mode == 'rw' or mode == 'w':
writeable = 1;
segments = xenctl.utils.lookup_disk_uname(uname)
if not segments:
print "Lookup Failed"
sys.exit(1)
if xenctl.utils.vd_extents_validate(segments,writeable) < 0:
print "That mapping is too unsafe for the current VBD expertise level"
sys.exit(1)
virt_dev = xenctl.utils.blkdev_name_to_number(dev)
xc.vbd_create(dom,virt_dev,writeable)
if xc.vbd_setextents( dom, virt_dev, segments ):
print "Error populating VBD vbd=%d\n" % virt_dev
sys.exit(1)
print "Added disk/partition %s to domain %d as device %s (%x)" % (uname, dom, dev, virt_dev)
elif cmd == 'vbd_remove':
import xenctl.utils
if len(sys.argv) < 4:
usage()
sys.exit(1)
dev = sys.argv[3]
virt_dev = xenctl.utils.blkdev_name_to_number(dev)
if not xc.vbd_destroy(dom,virt_dev):
print "Removed disk/partition attached as device %s (%x) in domain %d" % (dev, virt_dev, dom)
else:
print "Failed"
sys.exit(1)
elif cmd == 'cpu_atropos_set': # args: dom period slice latency xtratime
if len(sys.argv) < 6:
usage()
sys.exit(1)
(period, slice, latency, xtratime) = map(lambda x: int(x), sys.argv[3:7])
rc = xc.atropos_domain_set(dom, period, slice, latency, xtratime)
elif cmd == 'cpu_rrobin_slice':
rc = xc.rrobin_global_set(slice=int(sys.argv[2]))
else:
usage()
sys.exit(-1)
if rc != '':
print "return code %d" % rc
|
