+ def create(name, rec=None):
+ ''' Create dirs, copy fs image, lxc_create '''
+ logger.verbose ('sliver_lxc: %s create'%(name))
+ conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE)
+
+ vref = rec['vref']
+ if vref is None:
+ vref = "lxc-f18-x86_64"
+ logger.log("sliver_libvirt: %s: WARNING - no vref attached, using hard-wired default %s" % (name,vref))
+
+ # compute guest arch from vref
+ # essentially we want x86_64 (default) or i686 here for libvirt
+ try:
+ (x,y,arch)=vref.split('-')
+ arch = "x86_64" if arch.find("64")>=0 else "i686"
+ except:
+ arch='x86_64'
+
+ # Get the type of image from vref myplc tags specified as:
+ # pldistro = lxc
+ # fcdistro = squeeze
+ # arch x86_64
+
+ arch = 'x86_64'
+ tags = rec['rspec']['tags']
+ if 'arch' in tags:
+ arch = tags['arch']
+ if arch == 'i386':
+ arch = 'i686'
+
+
+
+
+ refImgDir = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, vref)
+ containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name)
+
+ # 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 Expected reference image in %s'%(name,refImgDir))
+ return
+
+# this hopefully should be fixed now
+# # in fedora20 we have some difficulty in properly cleaning up /vservers/<slicename>
+# # also note that running e.g. btrfs subvolume create /vservers/.lvref/image /vservers/foo
+# # behaves differently, whether /vservers/foo exists or not:
+# # if /vservers/foo does not exist, it creates /vservers/foo
+# # but if it does exist, then it creates /vservers/foo/image !!
+# # so we need to check the expected container rootfs does not exist yet
+# # this hopefully could be removed in a future release
+# if os.path.exists (containerDir):
+# logger.log("sliver_lxc: %s: WARNING cleaning up pre-existing %s"%(name,containerDir))
+# command = ['btrfs', 'subvolume', 'delete', containerDir]
+# logger.log_call(command, BTRFS_TIMEOUT)
+# # re-check
+# if os.path.exists (containerDir):
+# logger.log('sliver_lxc: %s: ERROR Could not create sliver - could not clean up empty %s'%(name,containerDir))
+# return
+
+ # Snapshot the reference image fs (assume the reference image is in its own
+ # subvolume)
+ command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
+ if not logger.log_call(command, timeout=BTRFS_TIMEOUT):
+ logger.log('sliver_lxc: ERROR Could not create BTRFS snapshot at', containerDir)
+ return
+ command = ['chmod', '755', containerDir]
+ logger.log_call(command)
+
+ # TODO: set quotas...
+
+ # Set hostname. A valid hostname cannot have '_'
+ #with open(os.path.join(containerDir, 'etc/hostname'), 'w') as f:
+ # print >>f, name.replace('_', '-')
+
+ # Add slices group if not already present
+ try:
+ group = grp.getgrnam('slices')
+ except:
+ command = ['/usr/sbin/groupadd', 'slices']
+ logger.log_call(command)
+
+ # Add unix account (TYPE is specified in the subclass)
+ command = ['/usr/sbin/useradd', '-g', 'slices', '-s', Sliver_LXC.SHELL, name, '-p', '*']
+ logger.log_call(command)
+ command = ['mkdir', '/home/%s/.ssh'%name]
+ logger.log_call(command)
+
+ # Create PK pair keys to connect from the host to the guest without
+ # 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)
+
+ command = ['chown', '-R', '%s.slices'%name, '/home/%s/.ssh'%name]
+ logger.log_call(command)
+
+ command = ['mkdir', '%s/root/.ssh'%containerDir]
+ logger.log_call(command)
+
+ command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
+ logger.log_call(command)
+
+ 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)
+ command = ['chown', name, '%s/home/%s' % (containerDir, name)]
+ logger.log_call(command)
+ etcpasswd = os.path.join(containerDir, 'etc/passwd')
+ etcgroup = os.path.join(containerDir, 'etc/group')
+ if os.path.exists(etcpasswd):
+ # create all accounts with gid=1001 - i.e. 'slices' like it is in the root context
+ slices_gid=1001
+ logger.log("adding user %(name)s id %(uid)d gid %(slices_gid)d to %(etcpasswd)s" % (locals()))
+ try:
+ file(etcpasswd,'a').write("%(name)s:x:%(uid)d:%(slices_gid)d::/home/%(name)s:/bin/bash\n" % locals())
+ except:
+ logger.log_exc("exception while updating %s"%etcpasswd)
+ logger.log("adding group slices with gid %(slices_gid)d to %(etcgroup)s"%locals())
+ try:
+ file(etcgroup,'a').write("slices:x:%(slices_gid)d\n"%locals())
+ except:
+ logger.log_exc("exception while updating %s"%etcgroup)
+ 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")
+
+ # customizations for the user environment - root or slice uid
+ # we save the whole business in /etc/planetlab.profile
+ # and source this file for both root and the slice uid's .profile
+ # prompt for slice owner, + LD_PRELOAD for transparently wrap bind
+ pl_profile=os.path.join(containerDir,"etc/planetlab.profile")
+ ld_preload_text="""# 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"""
+ usrmove_path_text="""# VM's before Features/UsrMove need /bin and /sbin in their PATH"""
+ usrmove_path_code="""
+pathmunge () {
+ if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
+ if [ "$2" = "after" ] ; then
+ PATH=$PATH:$1
+ else
+ PATH=$1:$PATH
+ fi
+ fi
+}
+pathmunge /bin after
+pathmunge /sbin after
+unset pathmunge
+"""
+ with open(pl_profile,'w') as f:
+ f.write("export PS1='%s@\H \$ '\n"%(name))
+ f.write("%s\n"%ld_preload_text)
+ f.write("export LD_PRELOAD=/etc/planetlab/lib/bind_public.so\n")
+ f.write("%s\n"%usrmove_path_text)
+ f.write("%s\n"%usrmove_path_code)
+
+ # make sure this file is sourced from both root's and slice's .profile
+ enforced_line = "[ -f /etc/planetlab.profile ] && source /etc/planetlab.profile\n"
+ for path in [ 'root/.profile', 'home/%s/.profile'%name ]:
+ from_root=os.path.join(containerDir,path)
+ # if dir is not yet existing let's forget it for now
+ if not os.path.isdir(os.path.dirname(from_root)): continue
+ found=False
+ try:
+ contents=file(from_root).readlines()
+ for content in contents:
+ if content==enforced_line: found=True
+ except IOError: pass
+ if not found:
+ with open(from_root,"a") as user_profile:
+ user_profile.write(enforced_line)
+ # in case we create the slice's .profile when writing
+ if from_root.find("/home")>=0:
+ command=['chown','%s:slices'%name,from_root]
+ logger.log_call(command)
+
+ # 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_sliceimage = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR,'lxc_template.xml')
+ 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 %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, interfaces=interfaces, arch=arch)
+ except IOError:
+ logger.log('Failed to parse or use XML template file %s'%template_filename)
+ return
+
+ # Lookup for the sliver before actually
+ # defining it, just in case it was already defined.
+ try:
+ dom = conn.lookupByName(name)
+ except:
+ dom = conn.defineXML(xml)
+ logger.verbose('lxc_create: %s -> %s'%(name, Sliver_Libvirt.dom_details(dom)))
+
+