connections = dict()
-def getConnection(uri):
+# Helper methods
+
+def getConnection(sliver_type):
# TODO: error checking
+ # vtype is of the form sliver.[LXC/QEMU] we need to lower case to lxc/qemu
+ vtype = sliver_type.split('.')[1].lower()
+ uri = vtype + '://'
return connections.setdefault(uri, libvirt.open(uri))
-def create(name, xml, rec, conn):
- ''' Create dirs, copy fs image, lxc_create '''
- logger.verbose ('sliver_libvirt: %s create'%(name))
-
- # 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(REF_IMG_BASE_DIR, vref)
- containerDir = os.path.join(CON_BASE_DIR, name)
-
- # check the template exists -- there's probably a better way..
- if not os.path.isdir(refImgDir):
- logger.log('sliver_libvirt: %s: ERROR Could not create sliver - reference image %s not found' % (name,vref))
- return
-
- # Copy the reference image fs
- # shutil.copytree("/vservers/.lvref/%s"%vref, "/vservers/%s"%name, symlinks=True)
- command = ['cp', '-r', refImgDir, containerDir]
- logger.log_call(command, timeout=15*60)
-
- # 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', '/bin/sshsh', 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 = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
- logger.log_call(command, timeout=15*60)
-
- # Get a connection and 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, debuginfo(dom)))
-
-
-def destroy(name, conn):
- logger.verbose ('sliver_libvirt: %s destroy'%(name))
-
- dir = '/vservers/%s'%(name)
- lxc_log = '%s/lxc.log'%(dir)
-
- try:
-
- # Destroy libvirt domain
- dom = conn.lookupByName(name)
- dom.destroy()
- 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
- shutil.rmtree("/vservers/%s"%name)
- except:
- logger.verbose('sliver_libvirt: Unexpected error on %s: %s'%(name, sys.exc_info()[0]))
-
-
-def start(dom):
- ''' Just start the sliver '''
- print "LIBVIRT %s start"%(dom.name())
-
- # Check if it's running to avoid throwing an exception if the
- # domain was already running, create actually means start
- if not is_running(dom):
- dom.create()
- else:
- logger.verbose('sliver_libvirt: sliver %s already started'%(dom.name()))
-
-
-def stop(dom):
- logger.verbose('sliver_libvirt: %s stop'%(dom.name()))
-
- try:
- dom.destroy()
- except:
- print "Unexpected error:", sys.exc_info()[0]
-
-def is_running(dom):
- ''' Return True if the domain is running '''
- logger.verbose('sliver_libvirt: %s is_running'%dom.name())
- try:
- [state, _, _, _, _] = dom.info()
- if state == libvirt.VIR_DOMAIN_RUNNING:
- logger.verbose('sliver_libvirt: %s is RUNNING'%(dom.name()))
- return True
- else:
- info = debuginfo(dom)
- logger.verbose('sliver_libvirt: %s is NOT RUNNING...\n%s'%(dom.name(), info))
- return False
- except:
- print "Unexpected error:", sys.exc_info()
-
def debuginfo(dom):
''' Helper method to get a "nice" output of the info struct for debug'''
[state, maxmem, mem, ncpu, cputime] = dom.info()
return '%s is %s, maxmem = %s, mem = %s, ncpu = %s, cputime = %s' % (dom.name(), STATES.get(state, state), maxmem, mem, ncpu, cputime)
+# Common Libvirt code
+
+class Sliver_Libvirt(accounts.Account):
+
+ def __init__(self, rec):
+ self.name = rec['name']
+ logger.verbose ('sliver_libvirt: %s init'%(self.name))
+
+ # Assume the directory with the image and config files
+ # are in place
+
+ self.keys = ''
+ self.rspec = {}
+ self.slice_id = rec['slice_id']
+ self.enabled = True
+ self.conn = getConnection(rec['type'])
+
+ try:
+ self.dom = self.conn.lookupByName(self.name)
+ except:
+ logger.verbose('sliver_libvirt: Domain %s does not exist UNEXPECTED: %s'%(self.name, sys.exc_info()[0]))
+
+
+ def start(self, delay=0):
+ ''' Just start the sliver '''
+ logger.verbose('sliver_libvirt: %s start'%(self.name))
+
+ # Check if it's running to avoid throwing an exception if the
+ # domain was already running, create actually means start
+ if not self.is_running():
+ self.dom.create()
+ else:
+ logger.verbose('sliver_libvirt: sliver %s already started'%(dom.name()))
+
+
+ def stop(self):
+ logger.verbose('sliver_libvirt: %s stop'%(self.name))
+
+ try:
+ self.dom.destroy()
+ except:
+ logger.verbose('sliver_libvirt: Domain %s not running UNEXPECTED: %s'%(self.name, sys.exc_info()[0]))
+ print 'sliver_libvirt: Domain %s not running UNEXPECTED: %s'%(self.name, sys.exc_info()[0])
+
+ def is_running(self):
+ ''' Return True if the domain is running '''
+ logger.verbose('sliver_libvirt: %s is_running'%self.name)
+ try:
+ [state, _, _, _, _] = self.dom.info()
+ if state == libvirt.VIR_DOMAIN_RUNNING:
+ logger.verbose('sliver_libvirt: %s is RUNNING'%self.name)
+ return True
+ else:
+ info = debuginfo(self.dom)
+ logger.verbose('sliver_libvirt: %s is NOT RUNNING...\n%s'%(self.name, info))
+ return False
+ except:
+ logger.verbose('sliver_libvirt: UNEXPECTED ERROR in %s...\n%s'%(self.name, sys.exc_info[0]))
+ print 'sliver_libvirt: UNEXPECTED ERROR in %s...\n%s'%(self.name, sys.exc_info[0])
+
+ def configure(self, rec):
+
+ sliver_type = rec['type'].split('.')[1] #sliver.[lxc/qemu]
+
+ BASE_DIR = '/cgroup/libvirt/%s/%s/'%(sliver_type, self.name)
+ # Disk allocation
+ # No way through cgroups... figure out how to do that with user/dir quotas.
+ # There is no way to do quota per directory. Chown-ing would create
+ # problems as username namespaces are not yet implemented (and thus, host
+ # and containers share the same name ids
+
+ # Btrfs support quota per volumes
+
+ # It will depend on the FS selection
+ if rec.has_key('disk_max'):
+ disk_max = rec['disk_max']
+ if disk_max == 0:
+ # unlimited
+ pass
+ else:
+ # limit to certain number
+ pass
+
+ # Memory allocation
+ if rec.has_key('memlock_hard'):
+ mem = rec['memlock_hard'] * 1024 # hard limit in bytes
+ with open(os.path.join(BASE_DIR, 'memory.limit_in_bytes'), 'w') as f:
+ print >>f, mem
+ if rec.has_key('memlock_soft'):
+ mem = rec['memlock_soft'] * 1024 # soft limit in bytes
+ with open(os.path.join(BASE_DIR, 'memory.soft_limit_in_bytes'), 'w') as f:
+ print >>f, mem
+
+ # CPU allocation
+ # Only cpu_shares until figure out how to provide limits and guarantees
+ # (RT_SCHED?)
+ if rec.has_key('cpu_share'):
+ cpu_share = rec['cpu_share']
+ with open(os.path.join(BASE_DIR, 'cpu.shares'), 'w') as f:
+ print >>f, cpu_share
+
+ # Call the upper configure method (ssh keys...)
+ accounts.Account.configure(self, rec)
+
+
+
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'
# 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)
git://git.onelab.eu / nodemanager.git / commitdiff