import os
import libvirt
import sys
+from string import Template
+import bwlimit
+import sliver_libvirt as lv
-def test_template():
-
- xml_template = """
- <domain type='lxc'>
- <name>test_1</name>
- <memory>32768</memory>
- <os>
- <type>exe</type>
- <init>/bin/sh</init>
- </os>
- <vcpu>1</vcpu>
- <clock offset='utc'/>
- <on_poweroff>destroy</on_poweroff>
- <on_reboot>restart</on_reboot>
- <on_crash>destroy</on_crash>
- <devices>
- <emulator>/usr/libexec/libvirt_lxc</emulator>
- <filesystem type='mount'>
- <source dir='/vservers/test_1/rootfs/'/>
- <target dir='/'/>
- </filesystem>
- <interface type='network'>
- <source network='default'/>
- </interface>
- <console type='pty' />
- </devices>
- </domain>"""
-
- 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):
+ 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 '''
- 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)
+ # 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)
- 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)
+ 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
- # 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()
+
+ # 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)
-