from string import Template
-states = {
+STATES = {
libvirt.VIR_DOMAIN_NOSTATE: 'no state',
libvirt.VIR_DOMAIN_RUNNING: 'running',
libvirt.VIR_DOMAIN_BLOCKED: 'blocked on resource',
REF_IMG_BASE_DIR = '/vservers/.lvref'
CON_BASE_DIR = '/vservers'
-class Sliver_LV(accounts.Account):
- """This class wraps LibVirt commands"""
-
- SHELL = '/bin/sh'
+connections = dict()
- # Need to add a tag at myplc to actually use this account
- # type = 'sliver.LIBVIRT'
- TYPE = 'sliver.LIBVIRT'
+def getConnection(uri):
+ # TODO: error checking
+ 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)
- @staticmethod
- def create(name, rec = None):
- ''' Create dirs, copy fs image, lxc_create '''
- logger.verbose ('sliver_libvirt: %s create'%(name))
-
- # Template for libvirt sliver configuration
- try:
- with open('/vservers/.lvref/config_template.xml') as f:
- template = Template(f.read())
- config = template.substitute(name=name)
- except IOError:
- logger.log('Cannot find XML template file')
- return
-
- # 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)
+ command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%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('_', '-')
+ # 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)))
- # Add slices group if not already present
- command = ['/usr/sbin/groupadd slices']
- logger.log_call(command, timeout=15*60)
-
- # Add unix account
- command = ['/usr/sbin/useradd', '-g', 'slices', '-s', '/bin/sh', name, '-p', '*']
- 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.
- conn = Sliver_LV.getConnection()
- try:
- dom = conn.lookupByName(name)
- except:
- dom = conn.defineXML(config)
- logger.verbose('lxc_create: %s -> %s'%(name, Sliver_LV.info(dom)))
-
- @staticmethod
- def destroy(name):
- logger.verbose ('sliver_libvirt: %s destroy'%(name))
-
- dir = '/vservers/%s'%(name)
- lxc_log = '%s/lxc.log'%(dir)
-
- conn = Sliver_LV.getConnection()
-
- try:
- command = ['/usr/sbin/userdel', '-r', name]
- logger.log_call(command, timeout=15*60)
-
- # Destroy libvirt domain
- dom = conn.lookupByName(name)
- dom.destroy()
- dom.undefine()
-
- # 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 destroy(name, conn):
+ logger.verbose ('sliver_libvirt: %s destroy'%(name))
- def __init__(self, rec):
- self.name = rec['name']
- logger.verbose ('sliver_libvirt: %s init'%(self.name))
-
- self.dir = '/vservers/%s'%(self.name)
+ dir = '/vservers/%s'%(name)
+ lxc_log = '%s/lxc.log'%(dir)
+
+ try:
- # Assume the directory with the image and config files
- # are in place
+ # 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)
- self.keys = ''
- self.rspec = {}
- self.slice_id = rec['slice_id']
- self.disk_usage_initialized = False
- self.initscript = ''
- self.enabled = True
- conn = Sliver_LV.getConnection()
- try:
- self.container = conn.lookupByName(self.name)
- except:
- logger.verbose('sliver_libvirt: Unexpected error on %s: %s'%(self.name, sys.exc_info()[0]))
-
- def configure(self, rec):
- ''' Allocate resources and fancy configuration stuff '''
- logger.verbose('sliver_libvirt: %s configure'%(self.name))
- accounts.Account.configure(self, rec)
+ # 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()))
- def start(self, delay=0):
- ''' Just start the sliver '''
- print "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.container.create()
- else:
- logger.verbose('sliver_libvirt: sliver %s already started'%(self.name))
-
- def stop(self):
- logger.verbose('sliver_libvirt: %s stop'%(self.name))
-
- try:
- self.container.destroy()
- except:
- print "Unexpected error:", sys.exc_info()[0]
+ try:
+ dom.destroy()
+ except:
+ print "Unexpected error:", 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.container.info()
- if state == libvirt.VIR_DOMAIN_RUNNING:
- logger.verbose('sliver_libvirt: %s is RUNNING'%(self.name))
- return True
- else:
- info = Sliver_LV.info(self.container)
- logger.verbose('sliver_libvirt: %s is NOT RUNNING...\n%s'%(self.name, info))
- return False
- except:
- print "Unexpected error:", sys.exc_info()
-
- ''' PRIVATE/HELPER/STATIC METHODS '''
- @staticmethod
- def getConnection():
- ''' Helper method to get a connection to the LXC driver of Libvirt '''
- conn = libvirt.open('lxc:///')
- if conn == None:
- print 'Failed to open connection to LXC hypervisor'
- sys.exit(1)
- else: return conn
-
- @staticmethod
- def info(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)
+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)
git://git.onelab.eu / nodemanager.git / blobdiff