X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sliver_lxc.py;h=4c2a599f6db927061de49f46db76dd0656143b35;hb=e34f11ab6ae05121531fe5ead1292bff98fe4733;hp=aef00add081a10ca0865d527b739e9a65d27ad7b;hpb=ffd0695eb1c979e4dcee9eae29dd3578801971f3;p=nodemanager.git diff --git a/sliver_lxc.py b/sliver_lxc.py index aef00ad..4c2a599 100644 --- a/sliver_lxc.py +++ b/sliver_lxc.py @@ -8,152 +8,127 @@ import subprocess import os import libvirt import sys +from string import Template +import sliver_libvirt as lv -def test_template(): - - xml_template = """ - - test_1 - 32768 - - exe - /bin/sh - - 1 - - destroy - restart - destroy - - /usr/libexec/libvirt_lxc - - - - - - - - - - """ - - return xml_template - -def createConnection(): - conn = libvirt.open('lxc:///') - if conn == None: - print 'Failed to open connection to LXC hypervisor' - sys.exit(1) - else: return conn - - -states = { - libvirt.VIR_DOMAIN_NOSTATE: 'no state', - libvirt.VIR_DOMAIN_RUNNING: 'running', - libvirt.VIR_DOMAIN_BLOCKED: 'blocked on resource', - libvirt.VIR_DOMAIN_PAUSED: 'paused by user', - libvirt.VIR_DOMAIN_SHUTDOWN: 'being shut down', - libvirt.VIR_DOMAIN_SHUTOFF: 'shut off', - libvirt.VIR_DOMAIN_CRASHED: 'crashed', -} - -def info(dom): - [state, maxmem, mem, ncpu, cputime] = dom.info() - return '%s is %s,\nmaxmem = %s, mem = %s, ncpu = %s, cputime = %s' % (dom.name(), states.get(state, state), maxmem, mem, ncpu, cputime) - -class Sliver_LXC(accounts.Account): + +class Sliver_LXC(lv.Sliver_Libvirt): """This class wraps LXC commands""" - SHELL = '/bin/sh' - # Using /bin/bash triggers destroy root/site_admin (?!?) + SHELL = '/bin/sshsh' + TYPE = 'sliver.LXC' # Need to add a tag at myplc to actually use this account # type = 'sliver.LXC' - def __init__(self, rec): - self.name = rec['name'] - print "LXC __init__ %s"%(self.name) - logger.verbose ('sliver_lxc: %s init'%self.name) - - self.dir = '/vservers/%s'%(self.name) - - # Assume the directory with the image and config files - # are in place - - self.config = '%s/config'%(self.dir) - self.fstab = '%s/fstab'%(self.dir) - self.lxc_log = '%s/lxc.log'%(self.dir) - self.keys = '' - self.rspec = {} - self.slice_id = rec['slice_id'] - self.disk_usage_initialized = False - self.initscript = '' - self.enabled = True - self.connection = createConnection() + REF_IMG_BASE_DIR = '/vservers/.lvref' + CON_BASE_DIR = '/vservers' @staticmethod - def create(name, rec = None): - ''' Create dirs, copy fs image, lxc_create ''' - print "LXC create %s"%(name) - logger.verbose ('sliver_lxc: %s create'%name) - dir = '/vservers/%s'%(name) - config = '%s/config'%(dir) - lxc_log = '%s/lxc.log'%(dir) + def create(name, rec=None): + logger.verbose ('sliver_lxc: %s create'%(name)) + conn = lv.getConnection(Sliver_LXC.TYPE) + + # Template for libvirt sliver configuration + try: + with open(Sliver_LXC.REF_IMG_BASE_DIR + '/config_template.xml') as f: + template = Template(f.read()) + xml = template.substitute(name=name) + except IOError: + logger.log('Cannot find XML template file') + return - if not (os.path.isdir(dir) and - os.access(dir, os.R_OK | os.W_OK | os.X_OK)): - print 'lxc_create: directory %s does not exist or wrong perms'%(dir) + ''' Create dirs, copy fs image, lxc_create ''' + # Get the type of image from vref myplc tags specified as: + # pldistro = lxc + # fcdistro = squeeze + # arch x86_64 + vref = rec['vref'] + if vref is None: + logger.log('sliver_libvirt: %s: WARNING - no vref attached defaults to lxc-debian' % (name)) + vref = "lxc-squeeze-x86_64" + + 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)) return - # Assume for now that the directory is there and with a FS - command=[] - # be verbose - command += ['/bin/bash','-x',] - command += ['/usr/bin/lxc-create', '-n', name, '-f', config, '&'] - print command - #subprocess.call(command, stdin=open('/dev/null', 'r'), stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT, shell=False) - conn = createConnection() + + # 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) + + # 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 + 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', '*'] + logger.log_call(command, timeout=15*60) + command = ['mkdir', '/home/%s/.ssh'%name] + logger.log_call(command, timeout=15*60) + + # 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, timeout=15*60) + + command = ['chown', '-R', '%s.slices'%name, '/home/%s/.ssh'%name] + logger.log_call(command, timeout=15*60) + + command = ['mkdir', '%s/root/.ssh'%containerDir] + logger.log_call(command, timeout=15*60) + + command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir] + logger.log_call(command, timeout=15*60) + + # Lookup for the sliver before actually + # defining it, just in case it was already defined. try: - dom0 = conn.lookupByName(name) + dom = conn.lookupByName(name) except: - dom0 = conn.defineXML(test_template()) - print info(dom0) + dom = conn.defineXML(xml) + logger.verbose('lxc_create: %s -> %s'%(name, lv.debuginfo(dom))) + @staticmethod def destroy(name): - ''' lxc_destroy ''' - print "LXC destroy %s"%(name) - dir = '/vservers/%s'%(name) - lxc_log = '%s/lxc.log'%(dir) - command=[] - command += ['/usr/bin/lxc-destroy', '-n', name] - - subprocess.call(command, stdin=open('/dev/null', 'r'), stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT, shell=False) - print "LXC destroy DONE" - - def configure(self, rec): - print "LXC configure %s"%(self.name) - - def start(self, delay=0): - ''' Check existence? lxc_start ''' - print "LXC start %s"%(self.name) - command=[] - command += ['/usr/bin/lxc-start', '-n', self.name, '-d'] - print command - subprocess.call(command, stdin=open('/dev/null', 'r'), stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT, shell=False) - - def stop(self): - ''' lxc_stop ''' - print "LXC stop %s"%(self.name) - - def is_running(self): - print "LXC is_running %s"%(self.name) - command = [] - command += ['/usr/bin/lxc-info -n %s'%(self.name)] - print command - p = subprocess.Popen(command, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True) - state = p.communicate()[0].split(' ')[2] - print state - if state == 'RUNNING': return True - else: return False - - + logger.verbose ('sliver_lxc: %s destroy'%(name)) + conn = lv.getConnection(Sliver_LXC.TYPE) + + containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name) + + try: + # Destroy libvirt domain + dom = conn.lookupByName(name) + except: + logger.verbose('sliver_lxc: Domain %s does not exist! UNEXPECTED'%name) + return + + try: + dom.destroy() + except: + logger.verbose('sliver_lxc: Domain %s not running... continuing.'%name) + + dom.undefine() + + # Remove user after destroy domain to force logout + command = ['/usr/sbin/userdel', '-f', '-r', name] + logger.log_call(command, timeout=15*60) + + # Remove rootfs of destroyed domain + command = ['btrfs', 'subvolume', 'delete', containerDir] + logger.log_call(command, timeout=15*60) + + logger.verbose('sliver_libvirt: %s destroyed.'%name) +