lxcsu

   1 #!/usr/bin/python
   2
   3
   4 import setns
   5 import os
   6
   7 from optparse import OptionParser
   8
   9 drop_capabilities='cap_sys_admin,cap_net_admin,cap_sys_boot,cap_sys_module'
  10
  11 parser = OptionParser()
  12 parser.add_option("-n", "--net",
  13                   action="store_true", dest="netns", default=False,
  14                   help="Enter network namespace")
  15 parser.add_option("-m", "--mnt",
  16                   action="store_true", dest="mntns", default=False,
  17                   help="Enter mount namespace")
  18 parser.add_option("-p", "--pid",
  19                   action="store_true", dest="pidns", default=False,
  20                   help="Enter pid namespace")
  21
  22 (options, args) = parser.parse_args()
  23
  24 try:
  25         slice_name = args[0]
  26 except IndexError:
  27         print "You must specify a vm name"
  28         exit(1)
  29
  30 try:
  31         cmd = 'grep %s /proc/*/cgroup | grep freezer'%slice_name
  32         output = os.popen(cmd).readlines()
  33 except:
  34         print "Error finding slice %s"%slice_name
  35         exit(1)
  36
  37 slice_spec = None
  38 for e in output:
  39         try:
  40                 l = e.rstrip()
  41                 path = l.split(':')[0]
  42                 comp = l.rsplit(':')[-1]
  43                 slice_name_check = comp.rsplit('/')[-1]
  44
  45                 if (slice_name_check == slice_name):
  46                         slice_path = path
  47                         pid = slice_path.split('/')[2]
  48                         cmdline = open('/proc/%s/cmdline'%pid).read().rstrip('\n\x00')
  49                         if (cmdline == '/sbin/init'):
  50                                 slice_spec = slice_path
  51                                 break
  52         except:
  53                 break
  54
  55 if (not slice_spec or not pid):
  56     print "Not started: %s"%slice_name
  57     exit(1)
  58
  59 r1 = setns.chcontext('/proc/%s/ns/utc'%pid)
  60 r2 = setns.chcontext('/proc/%s/ns/ipc'%pid)
  61 path = '/proc/%s/ns/net'%pid
  62 r3 = setns.chcontext(path)
  63
  64 open('/proc/lxcsu','w').write(pid)
  65 open('/proc/pidsu','w').write(pid)
  66 os.execv('/usr/sbin/capsh',['--drop',drop_capabilities,'--'])