"""LXC slivers"""
import accounts
+import logger
+import subprocess
+import os
+import libvirt
+import sys
+from string import Template
+import bwlimit
+import sliver_libvirt as lv
-class Sliver_LXC(accounts.Account):
- """This class wraps LXC commands"""
- SHELL = '/bin/bash'
+class Sliver_LXC(lv.Sliver_Libvirt):
+ """This class wraps LXC commands"""
+
+ SHELL = '/bin/sshsh'
+
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):
- pass
-
@staticmethod
- def create(name, rec = None):
- print "TODO create"
+ def create(name, rec=None):
+ logger.verbose ('sliver_lxc: %s create'%(name))
+ conn = lv.getConnection(Sliver_LXC.TYPE)
+
+ ''' 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)
+ command = ['chmod', '755', 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 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
+ try:
+ with open(Sliver_LXC.REF_IMG_BASE_DIR + '/config_template.xml') as f:
+ template = Template(f.read())
+ xml = template.substitute(name=name, xid=xid)
+ except IOError:
+ logger.log('Cannot find XML template file')
+ 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, lv.debuginfo(dom)))
+
+
@staticmethod
def destroy(name):
- print "TODO destroy"
+ logger.verbose ('sliver_lxc: %s destroy'%(name))
+ conn = lv.getConnection(Sliver_LXC.TYPE)
+
+ containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name)
- def start(self, delay=0):
- print "TODO start"
-
- def stop(self):
- print "TODO stop"
-
- def is_running(self):
- print "TODO is_running"
+ 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)
-
git://git.onelab.eu / nodemanager.git / blobdiff