"""LXC slivers"""
-import logger
import subprocess
-import os, os.path
-import libvirt
import sys
+import time
+import os, os.path
+import grp
+from pwd import getpwnam
from string import Template
-import bwlimit
-import sliver_libvirt as lv
-class Sliver_LXC(lv.Sliver_Libvirt):
+import libvirt
+
+import logger
+import plnode.bwlimit as bwlimit
+from initscript import Initscript
+from sliver_libvirt import 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 '''
logger.verbose ('sliver_lxc: %s create'%(name))
- conn = lv.getConnection(Sliver_LXC.TYPE)
+ conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)
# Get the type of image from vref myplc tags specified as:
# pldistro = lxc
# check the template exists -- there's probably a better way..
if not os.path.isdir(refImgDir):
logger.log('sliver_lxc: %s: ERROR Could not create sliver - reference image %s not found' % (name,vref))
- logger.log('sliver_lxc: %s: ERROR ctd expected reference image in %s'%(name,refImgDir))
+ logger.log('sliver_lxc: %s: ERROR Expected reference image in %s'%(name,refImgDir))
return
# Snapshot the reference image fs (assume the reference image is in its own
# subvolume)
command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
- logger.log_call(command, timeout=15*60)
+ if not logger.log_call(command, timeout=15*60):
+ logger.log('sliver_lxc: ERROR Could not create BTRFS snapshot at', containDir)
+ 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...
# print >>f, name.replace('_', '-')
# Add slices group if not already present
- command = ['/usr/sbin/groupadd', 'slices']
- logger.log_call(command, timeout=15*60)
+ try:
+ group = grp.getgrnam('slices')
+ except:
+ command = ['/usr/sbin/groupadd', 'slices']
+ logger.log_call(command, timeout=15*60)
# Add unix account (TYPE is specified in the subclass)
command = ['/usr/sbin/useradd', '-g', 'slices', '-s', Sliver_LXC.SHELL, name, '-p', '*']
# password... maybe remove the need for authentication inside the
# guest?
command = ['su', '-s', '/bin/bash', '-c', 'ssh-keygen -t rsa -N "" -f /home/%s/.ssh/id_rsa'%(name)]
- logger.log_call(command, timeout=15*60)
+ logger.log_call(command, timeout=60)
command = ['chown', '-R', '%s.slices'%name, '/home/%s/.ssh'%name]
- logger.log_call(command, timeout=15*60)
+ logger.log_call(command, timeout=30)
command = ['mkdir', '%s/root/.ssh'%containerDir]
- logger.log_call(command, timeout=15*60)
+ logger.log_call(command, timeout=10)
command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
- logger.log_call(command, timeout=15*60)
+ 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)
+ etcpasswd = os.path.join(containerDir, 'etc/passwd')
+ if os.path.exists(etcpasswd):
+ logger.log("adding user %s id %d to %s" % (name, uid, etcpasswd))
+ file(etcpasswd,'a').write("%s:x:%d:%d::/home/%s:/bin/bash\n" % (name, uid, uid, name))
# 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)
# Template for libvirt sliver configuration
-# template_filename = Sliver_LXC.REF_IMG_BASE_DIR + '/lxc_template.xml'
- # for compat with lxc-reference package, hopefully temporary
- template_filename_lxcreference = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR,'config_template.xml')
template_filename_sliceimage = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR,'lxc_template.xml')
- if os.path.isfile (template_filename_lxcreference):
- logger.log("WARNING: using compat template %s"%template_filename_lxcreference)
- template_filename=template_filename_lxcreference
- elif os.path.isfile (template_filename_sliceimage):
+ if os.path.isfile (template_filename_sliceimage):
logger.log("WARNING: using compat template %s"%template_filename_sliceimage)
template_filename=template_filename_sliceimage
else:
- logger.log("Cannot find XML template")
- logger.log("neither %s"%template_filename_lxcreference)
- logger.log("nor %s"%template_filename_sliceimage)
+ 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
dom = conn.lookupByName(name)
except:
dom = conn.defineXML(xml)
- logger.verbose('lxc_create: %s -> %s'%(name, lv.debuginfo(dom)))
+ logger.verbose('lxc_create: %s -> %s'%(name, Sliver_Libvirt.debuginfo(dom)))
@staticmethod
def destroy(name):
logger.verbose ('sliver_lxc: %s destroy'%(name))
- conn = lv.getConnection(Sliver_LXC.TYPE)
+ conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)
containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name)
# Destroy libvirt domain
dom = conn.lookupByName(name)
except:
- logger.verbose('sliver_lxc: Domain %s does not exist! UNEXPECTED'%name)
- return
+ logger.verbose('sliver_lxc: Domain %s does not exist!' % name)
try:
dom.destroy()
except:
- logger.verbose('sliver_lxc: Domain %s not running... continuing.'%name)
+ logger.verbose('sliver_lxc: Domain %s not running... continuing.' % name)
- dom.undefine()
+ try:
+ dom.undefine()
+ except:
+ logger.verbose('sliver_lxc: Domain %s is not defined... continuing.' % name)
# Remove user after destroy domain to force logout
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=15*60)
+ 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)
git://git.onelab.eu / nodemanager.git / blobdiff