X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sliver_lxc.py;h=37055986dd34ad82073f6e2542b46dd2bddbb86f;hb=ceae8bc56f3f46d5913ca8988b701337a35135cf;hp=441b2e6e49962b2009f0854d9a51ce5327590f02;hpb=e35cdeb5ae4e37a7205150195735ab8c69e6d522;p=nodemanager.git diff --git a/sliver_lxc.py b/sliver_lxc.py index 441b2e6..3705598 100644 --- a/sliver_lxc.py +++ b/sliver_lxc.py @@ -4,21 +4,24 @@ import subprocess import sys +import time import os, os.path import grp +from pwd import getpwnam from string import Template import libvirt import logger -import bwlimitlxc as bwlimit +import plnode.bwlimit as bwlimit from initscript import Initscript +from account import Account 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' @@ -45,6 +48,9 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): return # the generic /etc/init.d/vinit script is permanently refreshed, and enabled self.install_and_enable_vinit() + # expose .ssh for omf_friendly slivers + if 'tags' in self.rspec and 'omf_control' in self.rspec['tags']: + Account.mount_ssh_dir(self.name) 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() @@ -67,10 +73,18 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): # 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' + vref = rec['vref'] if vref is None: - logger.log('sliver_libvirt: %s: WARNING - no vref attached defaults to lxc-f14' % (name)) vref = "lxc-f14-x86_64" + logger.log("sliver_libvirt: %s: WARNING - no vref attached, using hard-wired default %s" % (name,vref)) refImgDir = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, vref) containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name) @@ -85,16 +99,11 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): # 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 - dot_profile=os.path.join(containerDir,"root/.profile") - with open(dot_profile,'w') as f: - f.write("export PS1='%s@\H \$ '\n"%(name)) - # TODO: set quotas... # Set hostname. A valid hostname cannot have '_' @@ -129,6 +138,102 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): 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') + 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,timeout=5) + # 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) @@ -141,10 +246,13 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): 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, xid=xid, interfaces=interfaces, arch=arch) except IOError: logger.log('Failed to parse or use XML template file %s'%template_filename) return @@ -160,6 +268,8 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): @staticmethod def destroy(name): + # umount .ssh directory - only if mounted + Account.umount_ssh_dir(name) logger.verbose ('sliver_lxc: %s destroy'%(name)) conn = Sliver_Libvirt.getConnection(Sliver_LXC.TYPE) @@ -185,9 +295,21 @@ class Sliver_LXC(Sliver_Libvirt, Initscript): 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)