def hitgen(self):
''' Generate a HIP config for the given node. First check for cached
config under HIP_CFG_CACHE.
'''
cfgbase = os.path.expanduser(HIP_CFG_CACHE)
if not os.path.exists(cfgbase):
os.mkdir(cfgbase)
cfgpath = os.path.join(cfgbase, self.name)
print "checking for cached config in %s..." % cfgpath,
if not os.path.exists(cfgpath):
os.mkdir(cfgpath)
myhosts = os.path.join(cfgpath, "my_host_identities.xml")
if not os.path.exists(myhosts):
print "generating host ID..."
mutecheck_call(["./hitgen", "-noinput", "-name", self.name,
"-file", myhosts])
else:
print "cached."
hipconf = os.path.join(cfgpath, "hip.conf")
if not os.path.exists(hipconf):
mutecheck_call(["./hitgen", "-file", hipconf, "-conf"])
self.mount(cfgpath, HIP_CFG_DIR)
pub = os.path.join(cfgpath, "%s_host_identities.pub.xml" % self.name)
if not os.path.exists(pub):
self.cmd([os.path.join(self.hip_path, "hitgen"), "-publish"])
def hitgen(self):
''' Generate a HIP config for the given node. First check for cached
config under HIP_CFG_CACHE.
'''
cfgbase = os.path.expanduser(HIP_CFG_CACHE)
if not os.path.exists(cfgbase):
os.mkdir(cfgbase)
cfgpath = os.path.join(cfgbase, self.name)
print "checking for cached config in %s..." % cfgpath,
if not os.path.exists(cfgpath):
os.mkdir(cfgpath)
myhosts = os.path.join(cfgpath, "my_host_identities.xml")
if not os.path.exists(myhosts):
print "generating host ID..."
mutecheck_call(
["./hitgen", "-noinput", "-name", self.name, "-file", myhosts])
else:
print "cached."
hipconf = os.path.join(cfgpath, "hip.conf")
if not os.path.exists(hipconf):
mutecheck_call(["./hitgen", "-file", hipconf, "-conf"])
self.mount(cfgpath, HIP_CFG_DIR)
pub = os.path.join(cfgpath, "%s_host_identities.pub.xml" % self.name)
if not os.path.exists(pub):
self.cmd([os.path.join(self.hip_path, "hitgen"), "-publish"])
def hipconfval(self, key, value):
''' Update the specified key in the hip.conf file with the given value.
Copy hip.conf to hip.conf.default first.
'''
hipconf = self.hipconfpath()
if not os.path.exists(hipconf):
mutecheck_call(["./hitgen", "-file", hipconf, "-conf"])
hipconfdef = hipconf + ".default"
# make backup copy of hip.conf if it doesn't exist yet
if not os.path.exists(hipconfdef):
shutil.copy2(hipconf, hipconfdef)
# modify the value
f = open(hipconf, 'r')
lines = f.readlines()
f.close()
f = open(hipconf, 'w')
changed = False
for line in lines:
if line.startswith(" <%s>" % key):
line = " <%s>%s</%s>\n" % (key, value, key)
changed = True
if line.startswith("</hip_configuration>"):
if (not changed):
newline = " <%s>%s</%s>\n" % (key, value, key)
f.write(newline)
f.write(line)
f.close()
def hipconfval(self, key, value):
''' Update the specified key in the hip.conf file with the given value.
Copy hip.conf to hip.conf.default first.
'''
hipconf = self.hipconfpath()
if not os.path.exists(hipconf):
mutecheck_call(["./hitgen", "-file", hipconf, "-conf"])
hipconfdef = hipconf + ".default"
# make backup copy of hip.conf if it doesn't exist yet
if not os.path.exists(hipconfdef):
shutil.copy2(hipconf, hipconfdef)
# modify the value
f = open(hipconf, 'r')
lines = f.readlines()
f.close()
f = open(hipconf, 'w')
changed = False
for line in lines:
if line.startswith(" <%s>" % key):
line = " <%s>%s</%s>\n" % (key, value, key)
changed = True
if line.startswith("</hip_configuration>"):
if (not changed):
newline = " <%s>%s</%s>\n" % (key, value, key)
f.write(newline)
f.write(line)
f.close()
def boot(self):
logger.warn("XEN PVM boot() called")
self.lock.acquire()
if not self.up:
raise Exception("Can't boot VM without initialized disk")
if self.booted:
self.lock.release()
return
self.session.services.bootnodeservices(self)
tarname = self.getconfigitem("persist_tar")
if tarname:
self.untarpersistent(tarname=tarname, iso=False)
try:
subprocess.check_call([constants.UMOUNT_BIN, self.mountdir])
self.unmount_all(self.mountdir)
subprocess.check_call([UDEVADM_PATH, "settle"])
subprocess.check_call([KPARTX_PATH, "-d", self.lvpath])
# time.sleep(5)
# time.sleep(1)
# unpause VM
logger.warn("XEN PVM boot() unpause domU %s", self.vmname)
utils.mutecheck_call([XM_PATH, "unpause", self.vmname])
self.booted = True
finally:
self.lock.release()
def addtap(self, name):
''' Install a TAP device into the namespace for use by the HIP daemon.
'''
localname = "%s.%s" % (self.name, name)
try:
mutecheck_call(["tunctl", "-t", localname])
except OSError, e:
print "error creating TUN/TAP device '%s':\n\t%s" % (localname, e)
print "make sure the 'tunctl' utility is installed"
sys.exit(1)
def addtap(self, name):
''' Install a TAP device into the namespace for use by the HIP daemon.
'''
localname = "%s.%s" % (self.name, name)
try:
mutecheck_call(["tunctl", "-t", localname])
except OSError, e:
print "error creating TUN/TAP device '%s':\n\t%s" % (localname, e)
print "make sure the 'tunctl' utility is installed"
sys.exit(1)
def createlogicalvolume(self):
"""
Create a logical volume for this Xen domU. Called from startup().
"""
if os.path.exists(self.lvpath):
raise Exception, "LVM volume already exists"
utils.mutecheck_call([
LVCREATE_PATH, "--size", self.disksize, "--name", self.lvname,
self.vgname
])
def createfilesystems(self):
"""
Make an ext4 filesystem and swap space. Return the device name for
the persistent partition so we can mount it.
"""
output = subprocess.Popen([KPARTX_PATH, "-l", self.lvpath],
stdout=subprocess.PIPE).communicate()[0]
lines = output.splitlines()
persistdev = "/dev/mapper/" + lines[0].strip().split(" ")[0].strip()
swapdev = "/dev/mapper/" + lines[1].strip().split(" ")[0].strip()
subprocess.check_call([KPARTX_PATH, "-a", self.lvpath])
utils.mutecheck_call([MKFSEXT4_PATH, "-L", "persist", persistdev])
utils.mutecheck_call([MKSWAP_PATH, "-f", "-L", "swap", swapdev])
return persistdev
def createvm(self):
"""
Instantiate a *paused* domU VM
Instantiate it now, so we can add network interfaces,
pause it so we can have the filesystem open for configuration.
"""
args = [XM_PATH, "create", os.devnull, "--paused"]
args.extend(["name=" + self.vmname, "memory=" + str(self.ramsize)])
args.append("disk=tap:aio:" + self.isofile + ",hda,r")
args.append("disk=phy:" + self.lvpath + ",hdb,w")
args.append("bootloader=pygrub")
bootargs = "--kernel=/isolinux/vmlinuz --ramdisk=/isolinux/initrd"
args.append("bootargs=" + bootargs)
for action in ("poweroff", "reboot", "suspend", "crash", "halt"):
args.append("on_%s=destroy" % action)
args.append("extra=" + self.getconfigitem("xm_create_extra"))
utils.mutecheck_call(args)
def shutdown(self):
logger.warn("XEN PVM shutdown() called")
if not self.up:
return
self.lock.acquire()
try:
if self.up:
# sketch from SimpleLxcNode
for netif in self.netifs():
netif.shutdown()
try:
# RJE XXX what to do here
if self.booted:
utils.mutecheck_call([XM_PATH, "destroy", self.vmname])
self.booted = False
except (OSError, subprocess.CalledProcessError):
# ignore this error too, the VM may have exited already
logger.exception("error during shutdown")
# discard LVM volume
lvm_remove_count = 0
while os.path.exists(self.lvpath):
try:
subprocess.check_call([UDEVADM_PATH, "settle"])
utils.mutecall([LVCHANGE_PATH, "-an", self.lvpath])
lvm_remove_count += 1
utils.mutecall([LVREMOVE_PATH, "-f", self.lvpath])
except OSError:
logger.exception("error during shutdown")
if lvm_remove_count > 1:
logger.warn(
"XEN PVM shutdown() required %d lvremove executions.",
lvm_remove_count)
self._netif.clear()
del self.session
self.up = False
finally:
self.rmnodedir()
self.lock.release()
