- parser.add_argument ("slice_name")
- parser.add_argument ("command_to_run",nargs="*")
-
- args = parser.parse_args()
- slice_name=args.slice_name
-
- # unless we run the symlink 'lxcsu-internal', or we specify the -i option, prepend '--' '-c'
- if sys.argv[0].find('internal')>=0: args.internal=True
-
- if len(args.command_to_run)>0 and (args.command_to_run[0] == "/sbin/service"):
- # A quick hack to support nodemanager interfaces.py when restarting
- # networking in a slice.
- args.nosliceuid = True
-
- # plain lxcsu
- if not args.internal:
- # no command given: enter interactive shell
- if not args.command_to_run: args.command_to_run=['/bin/sh']
- args.command_to_run = [ '-c' ] + [" ".join(args.command_to_run)]
+ parser.add_argument("slice_name")
+ parser.add_argument("command_to_run", nargs="*")
+
+ args = parser.parse_args()
+ slice_name = args.slice_name
+
+ # support for either setting debug at the top of this file, or on the command-line
+ if args.debug:
+ global debug
+ debug = True
+
+ # somehow some older nodes won't be able to find the login name in /etc/passwd
+ # when this is done down the road, so compute slice_uid while in a safe env
+ # even though we don't use the slice_uid any more, this is still
+ # checked later on as a means to ensure existence of the slice account
+ try:
+ slice_uid = pwd.getpwnam(slice_name).pw_uid
+ except Exception as e:
+ if debug:
+ import traceback
+ print('error while computing slice_uid', e)
+ traceback.print_exc()
+ slice_uid = None
+
+ # unless we run the symlink 'lxcsu-internal', or we specify the -i option, prepend '--' '-c'
+ if sys.argv[0].find('internal') >= 0:
+ args.internal = True
+
+ if len(args.command_to_run) > 0 and (args.command_to_run[0] == "/sbin/service"):
+ # A quick hack to support nodemanager interfaces.py when restarting
+ # networking in a slice.
+ args.nosliceuid = True
+
+ # plain lxcsu
+ if not args.internal:
+ # no command given: enter interactive shell
+ if not args.command_to_run:
+ args.command_to_run = ['/bin/sh']
+ args.command_to_run = ['-c'] + [" ".join(args.command_to_run)]
+
+ try:
+ cmd = '/usr/bin/virsh --connect lxc:/// domid %s' % slice_name
+ # convert to int as a minimal raincheck
+ driver_pid = int(os.popen(cmd).read().strip())
+ # locate the pid for the - expected - single child, that would be the init for that VM
+ #init_pid = int(open("/proc/%s/task/%s/children"%(driver_pid,driver_pid)).read().strip())
+ init_pid = int(os.popen('pgrep -P %s' %
+ driver_pid).readlines()[0].strip())
+ # Thierry: I am changing the code below to use init_pid instead of driver_pid
+ # for the namespace handling features, that I was able to check
+ # I've left the other ones as they were, i.e. using driver_pid, but I suspect
+ # some should be changed as well
+
+ except:
+ print("Domain %s not found" % slice_name)
+ exit(1)
+
+ if not driver_pid or not init_pid:
+ print("Domain %s not started" % slice_name)
+ exit(1)
+
+ if debug:
+ print("Found driver_pid", driver_pid, 'and init_pid=', init_pid)
+ # driver_pid is always x86_64, we need to look at the VM's init process here
+ arch = getarch(init_pid)
+
+ # Set sysctls specific to slice
+ sysctls = []
+ sysctl_dir = '/etc/planetlab/vsys-attributes/%s' % slice_name
+ if (os.access(sysctl_dir, 0)):
+ entries = os.listdir(sysctl_dir)
+ for e in entries:
+ prefix = 'vsys_sysctl.'
+ if (e.startswith(prefix)):
+ sysctl_file = '/'.join([sysctl_dir, e])
+ sysctl_name = e[len(prefix):]
+ sysctl_val = open(sysctl_file).read()
+ sysctls.append((sysctl_file, sysctl_name, sysctl_val))
+
+ # xxx probably init_pid here too
+ subdirs = get_cgroup_subdirs_for_pid(driver_pid)
+ sysfs_root = '/sys/fs/cgroup'
+
+ # If the slice is frozen, then we'll get an EBUSY when trying to write to the task
+ # list for the freezer cgroup. Since the user couldn't do anything anyway, it's best
+ # in this case to error out the shell. (an alternative would be to un-freeze it,
+ # add the task, and re-freeze it)
+ # Enter cgroups
+ current_cgroup = ''
+ for subsystem in ['cpuset', 'memory', 'blkio', 'cpuacct', 'cpuacct,cpu', 'freezer']:
+ try:
+ current_cgroup = subsystem