X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sliver_lxc.py;h=4c2a599f6db927061de49f46db76dd0656143b35;hb=b2758c0c0334f73375e5937d2538b80d73959fdb;hp=e68a0b44c19a5883fc8709404dc90670c10891ed;hpb=ae9ce869dc1f25965dfd8107c88bfc7bcddcf3e2;p=nodemanager.git diff --git a/sliver_lxc.py b/sliver_lxc.py index e68a0b4..4c2a599 100644 --- a/sliver_lxc.py +++ b/sliver_lxc.py @@ -11,9 +11,8 @@ import sys from string import Template import sliver_libvirt as lv -URI = 'lxc://' -class Sliver_LXC(accounts.Account): +class Sliver_LXC(lv.Sliver_Libvirt): """This class wraps LXC commands""" SHELL = '/bin/sshsh' @@ -22,58 +21,114 @@ class Sliver_LXC(accounts.Account): # 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' @staticmethod def create(name, rec=None): - conn = lv.getConnection(URI) + logger.verbose ('sliver_lxc: %s create'%(name)) + conn = lv.getConnection(Sliver_LXC.TYPE) # Template for libvirt sliver configuration try: - with open('/vservers/.lvref/config_template.xml') as f: + with open(Sliver_LXC.REF_IMG_BASE_DIR + '/config_template.xml') as f: template = Template(f.read()) - config = template.substitute(name=name) + xml = template.substitute(name=name) except IOError: logger.log('Cannot find XML template file') return - lv.create(name, config, rec, conn) + ''' 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 + + # 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: + dom = conn.lookupByName(name) + except: + dom = conn.defineXML(xml) + logger.verbose('lxc_create: %s -> %s'%(name, lv.debuginfo(dom))) + @staticmethod def destroy(name): - conn = lv.getConnection(URI) - lv.destroy(name, conn) - - def __init__(self, rec): - self.name = rec['name'] - logger.verbose ('sliver_lxc: %s init'%(self.name)) - - self.dir = '/vservers/%s'%(self.name) + logger.verbose ('sliver_lxc: %s destroy'%(name)) + conn = lv.getConnection(Sliver_LXC.TYPE) - # Assume the directory with the image and config files - # are in place - - self.keys = '' - self.rspec = {} - self.slice_id = rec['slice_id'] - self.disk_usage_initialized = False - self.initscript = '' - self.enabled = True - self.conn = lv.getConnection(URI) + containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name) + try: - self.container = self.conn.lookupByName(self.name) + # Destroy libvirt domain + dom = conn.lookupByName(name) except: - logger.verbose('sliver_libvirt: Unexpected error on %s: %s'%(self.name, sys.exc_info()[0])) + logger.verbose('sliver_lxc: Domain %s does not exist! UNEXPECTED'%name) + return - def start(self, delay=0): - lv.start(self.container) + try: + dom.destroy() + except: + logger.verbose('sliver_lxc: Domain %s not running... continuing.'%name) + + dom.undefine() - def stop(self): - lv.stop(self.container) + # 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) - def is_running(self): - lv.is_running(self.container) + logger.verbose('sliver_libvirt: %s destroyed.'%name) - def configure(self, rec): - ''' Allocate resources and fancy configuration stuff ''' - logger.verbose('sliver_libvirt: %s configure'%(self.name)) - accounts.Account.configure(self, rec)