import subprocess
import sys
+import time
import os, os.path
import grp
-import libvirt
+from pwd import getpwnam
from string import Template
+import libvirt
+
import logger
-import bwlimit
+import plnode.bwlimit as bwlimit
+from initscript import Initscript
from sliver_libvirt import Sliver_Libvirt
-class Sliver_LXC(Sliver_Libvirt):
+class Sliver_LXC(Sliver_Libvirt, Initscript):
"""This class wraps LXC commands"""
- SHELL = '/bin/sshsh'
+ SHELL = '/usr/sbin/vsh'
TYPE = 'sliver.LXC'
# Need to add a tag at myplc to actually use this account
# type = 'sliver.LXC'
REF_IMG_BASE_DIR = '/vservers/.lvref'
CON_BASE_DIR = '/vservers'
+ def __init__ (self, rec):
+ name=rec['name']
+ Sliver_Libvirt.__init__ (self,rec)
+ Initscript.__init__ (self,name)
+
+ def configure (self, rec):
+ Sliver_Libvirt.configure (self,rec)
+
+ # in case we update nodemanager..
+ self.install_and_enable_vinit()
+ # do the configure part from Initscript
+ Initscript.configure(self,rec)
+
+ def start(self, delay=0):
+ if 'enabled' in self.rspec and self.rspec['enabled'] <= 0:
+ logger.log('sliver_lxc: not starting %s, is not enabled'%self.name)
+ return
+ # the generic /etc/init.d/vinit script is permanently refreshed, and enabled
+ self.install_and_enable_vinit()
+ Sliver_Libvirt.start (self, delay)
+ # if a change has occured in the slice initscript, reflect this in /etc/init.d/vinit.slice
+ self.refresh_slice_vinit()
+
+ def rerun_slice_vinit (self):
+ """This is called whenever the initscript code changes"""
+ # xxx - todo - not sure exactly how to:
+ # (.) invoke something in the guest
+ # (.) which options of systemctl should be used to trigger a restart
+ # should not prevent the first run from going fine hopefully
+ logger.log("WARNING: sliver_lxc.rerun_slice_vinit not implemented yet")
+
@staticmethod
def create(name, rec=None):
''' Create dirs, copy fs image, lxc_create '''
# subvolume)
command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
if not logger.log_call(command, timeout=15*60):
- logger.log('sliver_lxc: ERROR Could not create BTRFS snapshot at', containDir)
+ logger.log('sliver_lxc: ERROR Could not create BTRFS snapshot at', containerDir)
return
command = ['chmod', '755', containerDir]
logger.log_call(command, timeout=15*60)
- # customize prompt for slice owner
+ # customize prompt for slice owner, + LD_PRELOAD for transparently wrap bind
dot_profile=os.path.join(containerDir,"root/.profile")
+ ld_preload_msg="""# by default, we define this setting so that calls to bind(2),
+# when invoked on 0.0.0.0, get transparently redirected to the public interface of this node
+# see https://svn.planet-lab.org/wiki/LxcPortForwarding"""
with open(dot_profile,'w') as f:
f.write("export PS1='%s@\H \$ '\n"%(name))
+ f.write("%s\n"%ld_preload_msg)
+ f.write("export LD_PRELOAD=/etc/planetlab/lib/bind_public.so\n")
# TODO: set quotas...
command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
logger.log_call(command, timeout=30)
+ logger.log("creating /etc/slicename file in %s" % os.path.join(containerDir,'etc/slicename'))
+ try:
+ file(os.path.join(containerDir,'etc/slicename'), 'w').write(name)
+ except:
+ logger.log_exc("exception while creating /etc/slicename")
+
+ try:
+ file(os.path.join(containerDir,'etc/slicefamily'), 'w').write(vref)
+ except:
+ logger.log_exc("exception while creating /etc/slicefamily")
+
+ uid = None
+ try:
+ uid = getpwnam(name).pw_uid
+ except KeyError:
+ # keyerror will happen if user id was not created successfully
+ logger.log_exc("exception while getting user id")
+
+ if uid is not None:
+ logger.log("uid is %d" % uid)
+ command = ['mkdir', '%s/home/%s' % (containerDir, name)]
+ logger.log_call(command, timeout=10)
+ command = ['chown', name, '%s/home/%s' % (containerDir, name)]
+ logger.log_call(command, timeout=10)
+ etcpasswd = os.path.join(containerDir, 'etc/passwd')
+ if os.path.exists(etcpasswd):
+ logger.log("adding user %s id %d to %s" % (name, uid, etcpasswd))
+ try:
+ file(etcpasswd,'a').write("%s:x:%d:%d::/home/%s:/bin/bash\n" % (name, uid, uid, name))
+ except:
+ logger.log_exc("exception while updating etc/passwd")
+ sudoers = os.path.join(containerDir, 'etc/sudoers')
+ if os.path.exists(sudoers):
+ try:
+ file(sudoers,'a').write("%s ALL=(ALL) NOPASSWD: ALL\n" % name)
+ except:
+ logger.log_exc("exception while updating /etc/sudoers")
+
# Lookup for xid and create template after the user is created so we
# can get the correct xid based on the name of the slice
xid = bwlimit.get_xid(name)
else:
logger.log("Cannot find XML template %s"%template_filename_sliceimage)
return
+
+ interfaces = Sliver_Libvirt.get_interfaces_xml(rec)
+
try:
with open(template_filename) as f:
template = Template(f.read())
- xml = template.substitute(name=name, xid=xid)
+ xml = template.substitute(name=name, interfaces=interfaces)
except IOError:
logger.log('Failed to parse or use XML template file %s'%template_filename)
return
command = ['/usr/sbin/userdel', '-f', '-r', name]
logger.log_call(command, timeout=15*60)
+ if os.path.exists(os.path.join(containerDir,"vsys")):
+ # Slivers with vsys running will fail the subvolume delete.
+ # A more permanent solution may be to ensure that the vsys module
+ # is called before the sliver is destroyed.
+ logger.log("destroying vsys directory and restarting vsys")
+ logger.log_call(["rm", "-fR", os.path.join(containerDir, "vsys")])
+ logger.log_call(["/etc/init.d/vsys", "restart", ])
+
# Remove rootfs of destroyed domain
command = ['btrfs', 'subvolume', 'delete', containerDir]
logger.log_call(command, timeout=60)
+ if os.path.exists(containerDir):
+ # oh no, it's still here...
+ logger.log("WARNING: failed to destroy container %s" % containerDir)
+
logger.verbose('sliver_libvirt: %s destroyed.'%name)