-#!/usr/bin/python
+#
#
# Copyright (C) 2006, 2007 Google Inc.
import os.path
import shutil
import time
-import tempfile
import stat
import errno
import re
import subprocess
+import random
+import logging
+import tempfile
-from ganeti import logger
from ganeti import errors
from ganeti import utils
from ganeti import ssh
from ganeti import ssconf
-def StartMaster():
- """Activate local node as master node.
+def _GetSshRunner():
+ return ssh.SshRunner()
+
- There are two needed steps for this:
- - run the master script
- - register the cron script
+def _GetMasterInfo():
+ """Return the master ip and netdev.
"""
- result = utils.RunCmd([constants.MASTER_SCRIPT, "-d", "start"])
+ try:
+ ss = ssconf.SimpleStore()
+ master_netdev = ss.GetMasterNetdev()
+ master_ip = ss.GetMasterIP()
+ except errors.ConfigurationError, err:
+ logging.exception("Cluster configuration incomplete")
+ return (None, None)
+ return (master_netdev, master_ip)
- if result.failed:
- logger.Error("could not activate cluster interface with command %s,"
- " error: '%s'" % (result.cmd, result.output))
- return False
- return True
+def StartMaster(start_daemons):
+ """Activate local node as master node.
+
+ The function will always try activate the IP address of the master
+ (if someone else has it, then it won't). Then, if the start_daemons
+ parameter is True, it will also start the master daemons
+ (ganet-masterd and ganeti-rapi).
+ """
+ ok = True
+ master_netdev, master_ip = _GetMasterInfo()
+ if not master_netdev:
+ return False
-def StopMaster():
+ if utils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
+ if utils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT,
+ source=constants.LOCALHOST_IP_ADDRESS):
+ # we already have the ip:
+ logging.debug("Already started")
+ else:
+ logging.error("Someone else has the master ip, not activating")
+ ok = False
+ else:
+ result = utils.RunCmd(["ip", "address", "add", "%s/32" % master_ip,
+ "dev", master_netdev, "label",
+ "%s:0" % master_netdev])
+ if result.failed:
+ logging.error("Can't activate master IP: %s", result.output)
+ ok = False
+
+ result = utils.RunCmd(["arping", "-q", "-U", "-c 3", "-I", master_netdev,
+ "-s", master_ip, master_ip])
+ # we'll ignore the exit code of arping
+
+ # and now start the master and rapi daemons
+ if start_daemons:
+ for daemon in 'ganeti-masterd', 'ganeti-rapi':
+ result = utils.RunCmd([daemon])
+ if result.failed:
+ logging.error("Can't start daemon %s: %s", daemon, result.output)
+ ok = False
+ return ok
+
+
+def StopMaster(stop_daemons):
"""Deactivate this node as master.
- This does two things:
- - run the master stop script
- - remove link to master cron script.
+ The function will always try to deactivate the IP address of the
+ master. Then, if the stop_daemons parameter is True, it will also
+ stop the master daemons (ganet-masterd and ganeti-rapi).
"""
- result = utils.RunCmd([constants.MASTER_SCRIPT, "-d", "stop"])
-
- if result.failed:
- logger.Error("could not deactivate cluster interface with command %s,"
- " error: '%s'" % (result.cmd, result.output))
+ master_netdev, master_ip = _GetMasterInfo()
+ if not master_netdev:
return False
- return True
-
+ result = utils.RunCmd(["ip", "address", "del", "%s/32" % master_ip,
+ "dev", master_netdev])
+ if result.failed:
+ logging.error("Can't remove the master IP, error: %s", result.output)
+ # but otherwise ignore the failure
-def AddNode(dsa, dsapub, rsa, rsapub, ssh, sshpub):
- """ adds the node to the cluster
- - updates the hostkey
- - adds the ssh-key
- - sets the node id
- - sets the node status to installed
+ if stop_daemons:
+ # stop/kill the rapi and the master daemon
+ for daemon in constants.RAPI_PID, constants.MASTERD_PID:
+ utils.KillProcess(utils.ReadPidFile(utils.DaemonPidFileName(daemon)))
- """
- f = open("/etc/ssh/ssh_host_rsa_key", 'w')
- f.write(rsa)
- f.close()
+ return True
- f = open("/etc/ssh/ssh_host_rsa_key.pub", 'w')
- f.write(rsapub)
- f.close()
- f = open("/etc/ssh/ssh_host_dsa_key", 'w')
- f.write(dsa)
- f.close()
+def AddNode(dsa, dsapub, rsa, rsapub, sshkey, sshpub):
+ """Joins this node to the cluster.
- f = open("/etc/ssh/ssh_host_dsa_key.pub", 'w')
- f.write(dsapub)
- f.close()
+ This does the following:
+ - updates the hostkeys of the machine (rsa and dsa)
+ - adds the ssh private key to the user
+ - adds the ssh public key to the users' authorized_keys file
- if not os.path.isdir("/root/.ssh"):
- os.mkdir("/root/.ssh")
+ """
+ sshd_keys = [(constants.SSH_HOST_RSA_PRIV, rsa, 0600),
+ (constants.SSH_HOST_RSA_PUB, rsapub, 0644),
+ (constants.SSH_HOST_DSA_PRIV, dsa, 0600),
+ (constants.SSH_HOST_DSA_PUB, dsapub, 0644)]
+ for name, content, mode in sshd_keys:
+ utils.WriteFile(name, data=content, mode=mode)
- f = open("/root/.ssh/id_dsa", 'w')
- f.write(ssh)
- f.close()
+ try:
+ priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS,
+ mkdir=True)
+ except errors.OpExecError, err:
+ logging.exception("Error while processing user ssh files")
+ return False
- f = open("/root/.ssh/id_dsa.pub", 'w')
- f.write(sshpub)
- f.close()
+ for name, content in [(priv_key, sshkey), (pub_key, sshpub)]:
+ utils.WriteFile(name, data=content, mode=0600)
- f = open('/root/.ssh/id_dsa.pub', 'r')
- try:
- utils.AddAuthorizedKey('/root/.ssh/authorized_keys', f.read(8192))
- finally:
- f.close()
+ utils.AddAuthorizedKey(auth_keys, sshpub)
- utils.RunCmd(["/etc/init.d/ssh", "restart"])
+ utils.RunCmd([constants.SSH_INITD_SCRIPT, "restart"])
- utils.RemoveFile("/root/.ssh/known_hosts")
return True
"""Cleans up the current node and prepares it to be removed from the cluster.
"""
- if os.path.exists(constants.DATA_DIR):
- for dirpath, dirnames, filenames in os.walk(constants.DATA_DIR):
- if dirpath == constants.DATA_DIR:
- for i in filenames:
- os.unlink(os.path.join(dirpath, i))
+ if os.path.isdir(constants.DATA_DIR):
+ for rel_name in utils.ListVisibleFiles(constants.DATA_DIR):
+ full_name = os.path.join(constants.DATA_DIR, rel_name)
+ if os.path.isfile(full_name) and not os.path.islink(full_name):
+ utils.RemoveFile(full_name)
+
+ try:
+ priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)
+ except errors.OpExecError:
+ logging.exception("Error while processing ssh files")
+ return
- f = open('/root/.ssh/id_dsa.pub', 'r')
+ f = open(pub_key, 'r')
try:
- utils.RemoveAuthorizedKey('/root/.ssh/authorized_keys', f.read(8192))
+ utils.RemoveAuthorizedKey(auth_keys, f.read(8192))
finally:
f.close()
- utils.RemoveFile('/root/.ssh/id_dsa')
- utils.RemoveFile('/root/.ssh/id_dsa.pub')
+ utils.RemoveFile(priv_key)
+ utils.RemoveFile(pub_key)
+
+ # Return a reassuring string to the caller, and quit
+ raise errors.QuitGanetiException(False, 'Shutdown scheduled')
def GetNodeInfo(vgname):
- """ gives back a hash with different informations
- about the node
+ """Gives back a hash with different informations about the node.
Returns:
{ 'vg_size' : xxx, 'vg_free' : xxx, 'memory_domain0': xxx,
if hyp_info is not None:
outputarray.update(hyp_info)
+ f = open("/proc/sys/kernel/random/boot_id", 'r')
+ try:
+ outputarray["bootid"] = f.read(128).rstrip("\n")
+ finally:
+ f.close()
+
return outputarray
if 'nodelist' in what:
result['nodelist'] = {}
+ random.shuffle(what['nodelist'])
for node in what['nodelist']:
- success, message = ssh.VerifyNodeHostname(node)
+ success, message = _GetSshRunner().VerifyNodeHostname(node)
if not success:
result['nodelist'][node] = message
+ if 'node-net-test' in what:
+ result['node-net-test'] = {}
+ my_name = utils.HostInfo().name
+ my_pip = my_sip = None
+ for name, pip, sip in what['node-net-test']:
+ if name == my_name:
+ my_pip = pip
+ my_sip = sip
+ break
+ if not my_pip:
+ result['node-net-test'][my_name] = ("Can't find my own"
+ " primary/secondary IP"
+ " in the node list")
+ else:
+ port = ssconf.SimpleStore().GetNodeDaemonPort()
+ for name, pip, sip in what['node-net-test']:
+ fail = []
+ if not utils.TcpPing(pip, port, source=my_pip):
+ fail.append("primary")
+ if sip != pip:
+ if not utils.TcpPing(sip, port, source=my_sip):
+ fail.append("secondary")
+ if fail:
+ result['node-net-test'][name] = ("failure using the %s"
+ " interface(s)" %
+ " and ".join(fail))
+
return result
"""Compute list of logical volumes and their size.
Returns:
- dictionary of all partions (key) with their size:
- test1: 20.06MiB
+ dictionary of all partions (key) with their size (in MiB), inactive
+ and online status:
+ {'test1': ('20.06', True, True)}
"""
- result = utils.RunCmd(["lvs", "--noheadings", "--units=m",
- "-oname,size", vg_name])
+ lvs = {}
+ sep = '|'
+ result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix",
+ "--separator=%s" % sep,
+ "-olv_name,lv_size,lv_attr", vg_name])
if result.failed:
- logger.Error("Failed to list logical volumes, lvs output: %s" %
- result.output)
- return {}
+ logging.error("Failed to list logical volumes, lvs output: %s",
+ result.output)
+ return result.output
+
+ valid_line_re = re.compile("^ *([^|]+)\|([0-9.]+)\|([^|]{6})\|?$")
+ for line in result.stdout.splitlines():
+ line = line.strip()
+ match = valid_line_re.match(line)
+ if not match:
+ logging.error("Invalid line returned from lvs output: '%s'", line)
+ continue
+ name, size, attr = match.groups()
+ inactive = attr[4] == '-'
+ online = attr[5] == 'o'
+ lvs[name] = (size, inactive, online)
- lvlist = [line.split() for line in result.output.splitlines()]
- return dict(lvlist)
+ return lvs
def ListVolumeGroups():
- """List the volume groups and their size
+ """List the volume groups and their size.
Returns:
Dictionary with keys volume name and values the size of the volume
"--separator=|",
"--options=lv_name,lv_size,devices,vg_name"])
if result.failed:
- logger.Error("Failed to list logical volumes, lvs output: %s" %
- result.output)
+ logging.error("Failed to list logical volumes, lvs output: %s",
+ result.output)
return {}
def parse_dev(dev):
'vg': line[3].strip(),
}
- return [map_line(line.split('|')) for line in result.output.splitlines()]
+ return [map_line(line.split('|')) for line in result.stdout.splitlines()
+ if line.count('|') >= 3]
def BridgesExist(bridges_list):
- """Check if a list of bridges exist on the current node
+ """Check if a list of bridges exist on the current node.
Returns:
True if all of them exist, false otherwise
def GetInstanceList():
- """ provides a list of instances
+ """Provides a list of instances.
Returns:
A list of all running instances on the current node
try:
names = hypervisor.GetHypervisor().ListInstances()
except errors.HypervisorError, err:
- logger.Error("error enumerating instances: %s" % str(err))
+ logging.exception("Error enumerating instances")
raise
return names
def GetInstanceInfo(instance):
- """ gives back the informations about an instance
- as a dictonary
+ """Gives back the informations about an instance as a dictionary.
Args:
instance: name of the instance (ex. instance1.example.com)
iinfo = hypervisor.GetHypervisor().GetAllInstancesInfo()
if iinfo:
- for name, id, memory, vcpus, state, times in iinfo:
+ for name, inst_id, memory, vcpus, state, times in iinfo:
output[name] = {
'memory': memory,
'vcpus': vcpus,
def AddOSToInstance(instance, os_disk, swap_disk):
- """Add an os to an instance.
+ """Add an OS to an instance.
Args:
instance: the instance object
create_script = inst_os.create_script
- for os_device in instance.disks:
- if os_device.iv_name == os_disk:
- break
- else:
- logger.Error("Can't find this device-visible name '%s'" % os_disk)
+ os_device = instance.FindDisk(os_disk)
+ if os_device is None:
+ logging.error("Can't find this device-visible name '%s'", os_disk)
return False
- for swap_device in instance.disks:
- if swap_device.iv_name == swap_disk:
- break
- else:
- logger.Error("Can't find this device-visible name '%s'" % swap_disk)
+ swap_device = instance.FindDisk(swap_disk)
+ if swap_device is None:
+ logging.error("Can't find this device-visible name '%s'", swap_disk)
return False
real_os_dev = _RecursiveFindBD(os_device)
if not os.path.exists(constants.LOG_OS_DIR):
os.mkdir(constants.LOG_OS_DIR, 0750)
- command = utils.BuildShellCmd("cd %s; %s -i %s -b %s -s %s &>%s",
+ command = utils.BuildShellCmd("cd %s && %s -i %s -b %s -s %s &>%s",
inst_os.path, create_script, instance.name,
real_os_dev.dev_path, real_swap_dev.dev_path,
logfile)
result = utils.RunCmd(command)
+ if result.failed:
+ logging.error("os create command '%s' returned error: %s, logfile: %s,"
+ " output: %s", command, result.fail_reason, logfile,
+ result.output)
+ return False
+
+ return True
+
+
+def RunRenameInstance(instance, old_name, os_disk, swap_disk):
+ """Run the OS rename script for an instance.
+
+ Args:
+ instance: the instance object
+ old_name: the old name of the instance
+ os_disk: the instance-visible name of the os device
+ swap_disk: the instance-visible name of the swap device
+
+ """
+ inst_os = OSFromDisk(instance.os)
+
+ script = inst_os.rename_script
+
+ os_device = instance.FindDisk(os_disk)
+ if os_device is None:
+ logging.error("Can't find this device-visible name '%s'", os_disk)
+ return False
+
+ swap_device = instance.FindDisk(swap_disk)
+ if swap_device is None:
+ logging.error("Can't find this device-visible name '%s'", swap_disk)
+ return False
+
+ real_os_dev = _RecursiveFindBD(os_device)
+ if real_os_dev is None:
+ raise errors.BlockDeviceError("Block device '%s' is not set up" %
+ str(os_device))
+ real_os_dev.Open()
+
+ real_swap_dev = _RecursiveFindBD(swap_device)
+ if real_swap_dev is None:
+ raise errors.BlockDeviceError("Block device '%s' is not set up" %
+ str(swap_device))
+ real_swap_dev.Open()
+
+ logfile = "%s/rename-%s-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
+ old_name,
+ instance.name, int(time.time()))
+ if not os.path.exists(constants.LOG_OS_DIR):
+ os.mkdir(constants.LOG_OS_DIR, 0750)
+
+ command = utils.BuildShellCmd("cd %s && %s -o %s -n %s -b %s -s %s &>%s",
+ inst_os.path, script, old_name, instance.name,
+ real_os_dev.dev_path, real_swap_dev.dev_path,
+ logfile)
+
+ result = utils.RunCmd(command)
if result.failed:
- logger.Error("os create command '%s' returned error: %s"
- " output: %s" %
- (command, result.fail_reason, result.output))
+ logging.error("os create command '%s' returned error: %s output: %s",
+ command, result.fail_reason, result.output)
return False
return True
vg_free is the free size of the volume group in MiB
pv_count are the number of physical disks in that vg
+ If an error occurs during gathering of data, we return the same dict
+ with keys all set to None.
+
"""
+ retdic = dict.fromkeys(["vg_size", "vg_free", "pv_count"])
+
retval = utils.RunCmd(["vgs", "-ovg_size,vg_free,pv_count", "--noheadings",
"--nosuffix", "--units=m", "--separator=:", vg_name])
if retval.failed:
- errmsg = "volume group %s not present" % vg_name
- logger.Error(errmsg)
- raise errors.LVMError(errmsg)
- valarr = retval.stdout.strip().split(':')
- retdic = {
- "vg_size": int(round(float(valarr[0]), 0)),
- "vg_free": int(round(float(valarr[1]), 0)),
- "pv_count": int(valarr[2]),
- }
+ logging.error("volume group %s not present", vg_name)
+ return retdic
+ valarr = retval.stdout.strip().rstrip(':').split(':')
+ if len(valarr) == 3:
+ try:
+ retdic = {
+ "vg_size": int(round(float(valarr[0]), 0)),
+ "vg_free": int(round(float(valarr[1]), 0)),
+ "pv_count": int(valarr[2]),
+ }
+ except ValueError, err:
+ logging.exception("Fail to parse vgs output")
+ else:
+ logging.error("vgs output has the wrong number of fields (expected"
+ " three): %s", str(valarr))
return retdic
try:
hyper.StartInstance(instance, block_devices, extra_args)
except errors.HypervisorError, err:
- logger.Error("Failed to start instance: %s" % err)
+ logging.exception("Failed to start instance")
return False
return True
try:
hyper.StopInstance(instance)
except errors.HypervisorError, err:
- logger.Error("Failed to stop instance: %s" % err)
+ logging.error("Failed to stop instance")
return False
# test every 10secs for 2min
time.sleep(10)
else:
# the shutdown did not succeed
- logger.Error("shutdown of '%s' unsuccessful, using destroy" % instance)
+ logging.error("shutdown of '%s' unsuccessful, using destroy", instance)
try:
hyper.StopInstance(instance, force=True)
except errors.HypervisorError, err:
- logger.Error("Failed to stop instance: %s" % err)
+ logging.exception("Failed to stop instance")
return False
time.sleep(1)
if instance.name in GetInstanceList():
- logger.Error("could not shutdown instance '%s' even by destroy")
+ logging.error("could not shutdown instance '%s' even by destroy",
+ instance.name)
+ return False
+
+ return True
+
+
+def RebootInstance(instance, reboot_type, extra_args):
+ """Reboot an instance.
+
+ Args:
+ instance - name of instance to reboot
+ reboot_type - how to reboot [soft,hard,full]
+
+ """
+ running_instances = GetInstanceList()
+
+ if instance.name not in running_instances:
+ logging.error("Cannot reboot instance that is not running")
+ return False
+
+ hyper = hypervisor.GetHypervisor()
+ if reboot_type == constants.INSTANCE_REBOOT_SOFT:
+ try:
+ hyper.RebootInstance(instance)
+ except errors.HypervisorError, err:
+ logging.exception("Failed to soft reboot instance")
return False
+ elif reboot_type == constants.INSTANCE_REBOOT_HARD:
+ try:
+ ShutdownInstance(instance)
+ StartInstance(instance, extra_args)
+ except errors.HypervisorError, err:
+ logging.exception("Failed to hard reboot instance")
+ return False
+ else:
+ raise errors.ParameterError("reboot_type invalid")
+
return True
-def CreateBlockDevice(disk, size, on_primary):
+def MigrateInstance(instance, target, live):
+ """Migrates an instance to another node.
+
+ """
+ hyper = hypervisor.GetHypervisor()
+
+ try:
+ hyper.MigrateInstance(instance, target, live)
+ except errors.HypervisorError, err:
+ msg = "Failed to migrate instance: %s" % str(err)
+ logging.error(msg)
+ return (False, msg)
+ return (True, "Migration successfull")
+
+
+def CreateBlockDevice(disk, size, owner, on_primary, info):
"""Creates a block device for an instance.
Args:
- bdev: a ganeti.objects.Disk object
- size: the size of the physical underlying devices
- do_open: if the device should be `Assemble()`-d and
- `Open()`-ed after creation
+ disk: a ganeti.objects.Disk object
+ size: the size of the physical underlying device
+ owner: a string with the name of the instance
+ on_primary: a boolean indicating if it is the primary node or not
+ info: string that will be sent to the physical device creation
Returns:
the new unique_id of the device (this can sometime be
clist = []
if disk.children:
for child in disk.children:
- crdev = _RecursiveAssembleBD(child, on_primary)
+ crdev = _RecursiveAssembleBD(child, owner, on_primary)
if on_primary or disk.AssembleOnSecondary():
# we need the children open in case the device itself has to
# be assembled
crdev.Open()
- else:
- crdev.Close()
clist.append(crdev)
try:
device = bdev.FindDevice(disk.dev_type, disk.physical_id, clist)
if device is not None:
- logger.Info("removing existing device %s" % disk)
+ logging.info("removing existing device %s", disk)
device.Remove()
except errors.BlockDeviceError, err:
pass
raise ValueError("Can't create child device for %s, %s" %
(disk, size))
if on_primary or disk.AssembleOnSecondary():
- device.Assemble()
- device.SetSyncSpeed(30*1024)
+ if not device.Assemble():
+ errorstring = "Can't assemble device after creation"
+ logging.error(errorstring)
+ raise errors.BlockDeviceError("%s, very unusual event - check the node"
+ " daemon logs" % errorstring)
+ device.SetSyncSpeed(constants.SYNC_SPEED)
if on_primary or disk.OpenOnSecondary():
device.Open(force=True)
+ DevCacheManager.UpdateCache(device.dev_path, owner,
+ on_primary, disk.iv_name)
+
+ device.SetInfo(info)
+
physical_id = device.unique_id
return physical_id
rdev = _RecursiveFindBD(disk, allow_partial=True)
except errors.BlockDeviceError, err:
# probably can't attach
- logger.Info("Can't attach to device %s in remove" % disk)
+ logging.info("Can't attach to device %s in remove", disk)
rdev = None
if rdev is not None:
+ r_path = rdev.dev_path
result = rdev.Remove()
+ if result:
+ DevCacheManager.RemoveCache(r_path)
else:
result = True
if disk.children:
return result
-def _RecursiveAssembleBD(disk, as_primary):
+def _RecursiveAssembleBD(disk, owner, as_primary):
"""Activate a block device for an instance.
This is run on the primary and secondary nodes for an instance.
"""
children = []
if disk.children:
+ mcn = disk.ChildrenNeeded()
+ if mcn == -1:
+ mcn = 0 # max number of Nones allowed
+ else:
+ mcn = len(disk.children) - mcn # max number of Nones
for chld_disk in disk.children:
- children.append(_RecursiveAssembleBD(chld_disk, as_primary))
+ try:
+ cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary)
+ except errors.BlockDeviceError, err:
+ if children.count(None) >= mcn:
+ raise
+ cdev = None
+ logging.debug("Error in child activation: %s", str(err))
+ children.append(cdev)
if as_primary or disk.AssembleOnSecondary():
r_dev = bdev.AttachOrAssemble(disk.dev_type, disk.physical_id, children)
- r_dev.SetSyncSpeed(30*1024)
+ r_dev.SetSyncSpeed(constants.SYNC_SPEED)
result = r_dev
if as_primary or disk.OpenOnSecondary():
r_dev.Open()
- else:
- r_dev.Close()
+ DevCacheManager.UpdateCache(r_dev.dev_path, owner,
+ as_primary, disk.iv_name)
+
else:
result = True
return result
-def AssembleBlockDevice(disk, as_primary):
+def AssembleBlockDevice(disk, owner, as_primary):
"""Activate a block device for an instance.
This is a wrapper over _RecursiveAssembleBD.
True for secondary nodes
"""
- result = _RecursiveAssembleBD(disk, as_primary)
+ result = _RecursiveAssembleBD(disk, owner, as_primary)
if isinstance(result, bdev.BlockDev):
result = result.dev_path
return result
"""
r_dev = _RecursiveFindBD(disk)
if r_dev is not None:
+ r_path = r_dev.dev_path
result = r_dev.Shutdown()
+ if result:
+ DevCacheManager.RemoveCache(r_path)
else:
result = True
if disk.children:
return result
-def MirrorAddChild(md_cdev, new_cdev):
- """Extend an MD raid1 array.
+def MirrorAddChildren(parent_cdev, new_cdevs):
+ """Extend a mirrored block device.
"""
- md_bdev = _RecursiveFindBD(md_cdev, allow_partial=True)
- if md_bdev is None:
- logger.Error("Can't find md device")
+ parent_bdev = _RecursiveFindBD(parent_cdev, allow_partial=True)
+ if parent_bdev is None:
+ logging.error("Can't find parent device")
return False
- new_bdev = _RecursiveFindBD(new_cdev)
- if new_bdev is None:
- logger.Error("Can't find new device to add")
+ new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs]
+ if new_bdevs.count(None) > 0:
+ logging.error("Can't find new device(s) to add: %s:%s",
+ new_bdevs, new_cdevs)
return False
- new_bdev.Open()
- md_bdev.AddChild(new_bdev)
+ parent_bdev.AddChildren(new_bdevs)
return True
-def MirrorRemoveChild(md_cdev, new_cdev):
- """Reduce an MD raid1 array.
+def MirrorRemoveChildren(parent_cdev, new_cdevs):
+ """Shrink a mirrored block device.
"""
- md_bdev = _RecursiveFindBD(md_cdev)
- if md_bdev is None:
- return False
- new_bdev = _RecursiveFindBD(new_cdev)
- if new_bdev is None:
+ parent_bdev = _RecursiveFindBD(parent_cdev)
+ if parent_bdev is None:
+ logging.error("Can't find parent in remove children: %s", parent_cdev)
return False
- new_bdev.Open()
- md_bdev.RemoveChild(new_bdev.dev_path)
+ devs = []
+ for disk in new_cdevs:
+ rpath = disk.StaticDevPath()
+ if rpath is None:
+ bd = _RecursiveFindBD(disk)
+ if bd is None:
+ logging.error("Can't find dynamic device %s while removing children",
+ disk)
+ return False
+ else:
+ devs.append(bd.dev_path)
+ else:
+ devs.append(rpath)
+ parent_bdev.RemoveChildren(devs)
return True
for dsk in disks:
rbd = _RecursiveFindBD(dsk)
if rbd is None:
- raise errors.BlockDeviceError, "Can't find device %s" % str(dsk)
+ raise errors.BlockDeviceError("Can't find device %s" % str(dsk))
stats.append(rbd.CombinedSyncStatus())
return stats
rbd = _RecursiveFindBD(disk)
if rbd is None:
return rbd
- sync_p, est_t, is_degr = rbd.GetSyncStatus()
- return rbd.dev_path, rbd.major, rbd.minor, sync_p, est_t, is_degr
+ return (rbd.dev_path, rbd.major, rbd.minor) + rbd.GetSyncStatus()
def UploadFile(file_name, data, mode, uid, gid, atime, mtime):
"""
if not os.path.isabs(file_name):
- logger.Error("Filename passed to UploadFile is not absolute: '%s'" %
- file_name)
+ logging.error("Filename passed to UploadFile is not absolute: '%s'",
+ file_name)
return False
- allowed_files = [constants.CLUSTER_CONF_FILE, "/etc/hosts",
- "/etc/ssh/ssh_known_hosts"]
+ allowed_files = [
+ constants.CLUSTER_CONF_FILE,
+ constants.ETC_HOSTS,
+ constants.SSH_KNOWN_HOSTS_FILE,
+ constants.VNC_PASSWORD_FILE,
+ constants.JOB_QUEUE_SERIAL_FILE,
+ ]
allowed_files.extend(ssconf.SimpleStore().GetFileList())
if file_name not in allowed_files:
- logger.Error("Filename passed to UploadFile not in allowed"
- " upload targets: '%s'" % file_name)
+ logging.error("Filename passed to UploadFile not in allowed"
+ " upload targets: '%s'", file_name)
return False
- dir_name, small_name = os.path.split(file_name)
- fd, new_name = tempfile.mkstemp('.new', small_name, dir_name)
- # here we need to make sure we remove the temp file, if any error
- # leaves it in place
- try:
- os.chown(new_name, uid, gid)
- os.chmod(new_name, mode)
- os.write(fd, data)
- os.fsync(fd)
- os.utime(new_name, (atime, mtime))
- os.rename(new_name, file_name)
- finally:
- os.close(fd)
- utils.RemoveFile(new_name)
+ utils.WriteFile(file_name, data=data, mode=mode, uid=uid, gid=gid,
+ atime=atime, mtime=mtime)
return True
+
def _ErrnoOrStr(err):
"""Format an EnvironmentError exception.
return detail
-def _OSOndiskVersion(name, os_dir=None):
- """Compute and return the api version of a given OS.
+def _OSOndiskVersion(name, os_dir):
+ """Compute and return the API version of a given OS.
- This function will try to read the api version of the os given by
- the 'name' parameter. By default, it wil use the constants.OS_DIR
- as top-level directory for OSes, but this can be overriden by the
- use of the os_dir parameter. Return value will be either an
- integer denoting the version or None in the case when this is not
- a valid OS name.
+ This function will try to read the API version of the os given by
+ the 'name' parameter and residing in the 'os_dir' directory.
- """
- if os_dir is None:
- os_dir = os.path.sep.join([constants.OS_DIR, name])
+ Return value will be either an integer denoting the version or None in the
+ case when this is not a valid OS name.
+ """
api_file = os.path.sep.join([os_dir, "ganeti_api_version"])
try:
st = os.stat(api_file)
except EnvironmentError, err:
- raise errors.InvalidOS, (name, "'ganeti_api_version' file not"
- " found (%s)" % _ErrnoOrStr(err))
+ raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file not"
+ " found (%s)" % _ErrnoOrStr(err))
if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
- raise errors.InvalidOS, (name, "'ganeti_api_version' file is not"
- " a regular file")
+ raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file is not"
+ " a regular file")
try:
f = open(api_file)
finally:
f.close()
except EnvironmentError, err:
- raise errors.InvalidOS, (name, "error while reading the"
- " API version (%s)" % _ErrnoOrStr(err))
+ raise errors.InvalidOS(name, os_dir, "error while reading the"
+ " API version (%s)" % _ErrnoOrStr(err))
api_version = api_version.strip()
try:
api_version = int(api_version)
except (TypeError, ValueError), err:
- raise errors.InvalidOS, (name, "API version is not integer (%s)" %
- str(err))
+ raise errors.InvalidOS(name, os_dir,
+ "API version is not integer (%s)" % str(err))
return api_version
-def DiagnoseOS(top_dir=None):
+
+def DiagnoseOS(top_dirs=None):
"""Compute the validity for all OSes.
- For each name in the give top_dir parameter (if not given, defaults
- to constants.OS_DIR), it will return an object. If this is a valid
- os, the object will be an instance of the object.OS class. If not,
- it will be an instance of errors.InvalidOS and this signifies that
- this name does not correspond to a valid OS.
+ Returns an OS object for each name in all the given top directories
+ (if not given defaults to constants.OS_SEARCH_PATH)
Returns:
- list of objects
+ list of OS objects
"""
- if top_dir is None:
- top_dir = constants.OS_DIR
+ if top_dirs is None:
+ top_dirs = constants.OS_SEARCH_PATH
- try:
- f_names = os.listdir(top_dir)
- except EnvironmentError, err:
- logger.Error("Can't list the OS directory: %s" % str(err))
- return False
result = []
- for name in f_names:
- try:
- os_inst = OSFromDisk(name, os.path.sep.join([top_dir, name]))
- result.append(os_inst)
- except errors.InvalidOS, err:
- result.append(err)
+ for dir_name in top_dirs:
+ if os.path.isdir(dir_name):
+ try:
+ f_names = utils.ListVisibleFiles(dir_name)
+ except EnvironmentError, err:
+ logging.exception("Can't list the OS directory %s", dir_name)
+ break
+ for name in f_names:
+ try:
+ os_inst = OSFromDisk(name, base_dir=dir_name)
+ result.append(os_inst)
+ except errors.InvalidOS, err:
+ result.append(objects.OS.FromInvalidOS(err))
return result
-def OSFromDisk(name, os_dir=None):
+def OSFromDisk(name, base_dir=None):
"""Create an OS instance from disk.
This function will return an OS instance if the given name is a
`errors.InvalidOS` exception, detailing why this is not a valid
OS.
+ Args:
+ os_dir: Directory containing the OS scripts. Defaults to a search
+ in all the OS_SEARCH_PATH directories.
+
"""
- if os_dir is None:
- os_dir = os.path.sep.join([constants.OS_DIR, name])
+
+ if base_dir is None:
+ os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir)
+ if os_dir is None:
+ raise errors.InvalidOS(name, None, "OS dir not found in search path")
+ else:
+ os_dir = os.path.sep.join([base_dir, name])
api_version = _OSOndiskVersion(name, os_dir)
if api_version != constants.OS_API_VERSION:
- raise errors.InvalidOS, (name, "API version mismatch (found %s want %s)"
- % (api_version, constants.OS_API_VERSION))
+ raise errors.InvalidOS(name, os_dir, "API version mismatch"
+ " (found %s want %s)"
+ % (api_version, constants.OS_API_VERSION))
# OS Scripts dictionary, we will populate it with the actual script names
- os_scripts = {'create': '', 'export': '', 'import': ''}
+ os_scripts = {'create': '', 'export': '', 'import': '', 'rename': ''}
for script in os_scripts:
os_scripts[script] = os.path.sep.join([os_dir, script])
try:
st = os.stat(os_scripts[script])
except EnvironmentError, err:
- raise errors.InvalidOS, (name, "'%s' script missing (%s)" %
- (script, _ErrnoOrStr(err)))
+ raise errors.InvalidOS(name, os_dir, "'%s' script missing (%s)" %
+ (script, _ErrnoOrStr(err)))
if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
- raise errors.InvalidOS, (name, "'%s' script not executable" % script)
+ raise errors.InvalidOS(name, os_dir, "'%s' script not executable" %
+ script)
if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
- raise errors.InvalidOS, (name, "'%s' is not a regular file" % script)
+ raise errors.InvalidOS(name, os_dir, "'%s' is not a regular file" %
+ script)
- return objects.OS(name=name, path=os_dir,
+ return objects.OS(name=name, path=os_dir, status=constants.OS_VALID_STATUS,
create_script=os_scripts['create'],
export_script=os_scripts['export'],
import_script=os_scripts['import'],
+ rename_script=os_scripts['rename'],
api_version=api_version)
+def GrowBlockDevice(disk, amount):
+ """Grow a stack of block devices.
+
+ This function is called recursively, with the childrens being the
+ first one resize.
+
+ Args:
+ disk: the disk to be grown
+
+ Returns: a tuple of (status, result), with:
+ status: the result (true/false) of the operation
+ result: the error message if the operation failed, otherwise not used
+
+ """
+ r_dev = _RecursiveFindBD(disk)
+ if r_dev is None:
+ return False, "Cannot find block device %s" % (disk,)
+
+ try:
+ r_dev.Grow(amount)
+ except errors.BlockDeviceError, err:
+ return False, str(err)
+
+ return True, None
+
+
def SnapshotBlockDevice(disk):
"""Create a snapshot copy of a block device.
if child.size == disk.size:
# return implies breaking the loop
return SnapshotBlockDevice(child)
- elif disk.dev_type == "lvm":
+ elif disk.dev_type == constants.LD_LV:
r_dev = _RecursiveFindBD(disk)
if r_dev is not None:
# let's stay on the safe side and ask for the full size, for now
else:
return None
else:
- raise errors.ProgrammerError, ("Cannot snapshot non-lvm block device"
- "'%s' of type '%s'" %
- (disk.unique_id, disk.dev_type))
+ raise errors.ProgrammerError("Cannot snapshot non-lvm block device"
+ " '%s' of type '%s'" %
+ (disk.unique_id, disk.dev_type))
def ExportSnapshot(disk, dest_node, instance):
comprcmd = "gzip"
- remotecmd = utils.BuildShellCmd("ssh -q -oStrictHostKeyChecking=yes"
- " -oBatchMode=yes -oEscapeChar=none"
- " %s 'mkdir -p %s; cat > %s/%s'",
- dest_node, destdir, destdir, destfile)
+ destcmd = utils.BuildShellCmd("mkdir -p %s && cat > %s/%s",
+ destdir, destdir, destfile)
+ remotecmd = _GetSshRunner().BuildCmd(dest_node, constants.GANETI_RUNAS,
+ destcmd)
# all commands have been checked, so we're safe to combine them
- command = '|'.join([expcmd, comprcmd, remotecmd])
+ command = '|'.join([expcmd, comprcmd, utils.ShellQuoteArgs(remotecmd)])
result = utils.RunCmd(command)
if result.failed:
- logger.Error("os snapshot export command '%s' returned error: %s"
- " output: %s" %
- (command, result.fail_reason, result.output))
+ logging.error("os snapshot export command '%s' returned error: %s"
+ " output: %s", command, result.fail_reason, result.output)
return False
return True
config.set(constants.INISECT_INS, 'memory', '%d' % instance.memory)
config.set(constants.INISECT_INS, 'vcpus', '%d' % instance.vcpus)
config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
+
+ nic_count = 0
for nic_count, nic in enumerate(instance.nics):
config.set(constants.INISECT_INS, 'nic%d_mac' %
nic_count, '%s' % nic.mac)
config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip)
+ config.set(constants.INISECT_INS, 'nic%d_bridge' % nic_count,
+ '%s' % nic.bridge)
# TODO: redundant: on load can read nics until it doesn't exist
config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_count)
+ disk_count = 0
for disk_count, disk in enumerate(snap_disks):
config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
('%s' % disk.iv_name))
inst_os = OSFromDisk(instance.os)
import_script = inst_os.import_script
- for os_device in instance.disks:
- if os_device.iv_name == os_disk:
- break
- else:
- logger.Error("Can't find this device-visible name '%s'" % os_disk)
+ os_device = instance.FindDisk(os_disk)
+ if os_device is None:
+ logging.error("Can't find this device-visible name '%s'", os_disk)
return False
- for swap_device in instance.disks:
- if swap_device.iv_name == swap_disk:
- break
- else:
- logger.Error("Can't find this device-visible name '%s'" % swap_disk)
+ swap_device = instance.FindDisk(swap_disk)
+ if swap_device is None:
+ logging.error("Can't find this device-visible name '%s'", swap_disk)
return False
real_os_dev = _RecursiveFindBD(os_device)
if real_os_dev is None:
- raise errors.BlockDeviceError, ("Block device '%s' is not set up" %
- str(os_device))
+ raise errors.BlockDeviceError("Block device '%s' is not set up" %
+ str(os_device))
real_os_dev.Open()
real_swap_dev = _RecursiveFindBD(swap_device)
if real_swap_dev is None:
- raise errors.BlockDeviceError, ("Block device '%s' is not set up" %
- str(swap_device))
+ raise errors.BlockDeviceError("Block device '%s' is not set up" %
+ str(swap_device))
real_swap_dev.Open()
logfile = "%s/import-%s-%s-%s.log" % (constants.LOG_OS_DIR, instance.os,
if not os.path.exists(constants.LOG_OS_DIR):
os.mkdir(constants.LOG_OS_DIR, 0750)
- remotecmd = utils.BuildShellCmd("ssh -q -oStrictHostKeyChecking=yes"
- " -oBatchMode=yes -oEscapeChar=none"
- " %s 'cat %s'", src_node, src_image)
+ destcmd = utils.BuildShellCmd('cat %s', src_image)
+ remotecmd = _GetSshRunner().BuildCmd(src_node, constants.GANETI_RUNAS,
+ destcmd)
comprcmd = "gunzip"
impcmd = utils.BuildShellCmd("(cd %s; %s -i %s -b %s -s %s &>%s)",
real_os_dev.dev_path, real_swap_dev.dev_path,
logfile)
- command = '|'.join([remotecmd, comprcmd, impcmd])
+ command = '|'.join([utils.ShellQuoteArgs(remotecmd), comprcmd, impcmd])
result = utils.RunCmd(command)
if result.failed:
- logger.Error("os import command '%s' returned error: %s"
- " output: %s" %
- (command, result.fail_reason, result.output))
+ logging.error("os import command '%s' returned error: %s"
+ " output: %s", command, result.fail_reason, result.output)
return False
return True
"""
if os.path.isdir(constants.EXPORT_DIR):
- return os.listdir(constants.EXPORT_DIR)
+ return utils.ListVisibleFiles(constants.EXPORT_DIR)
else:
return []
return True
+def RenameBlockDevices(devlist):
+ """Rename a list of block devices.
+
+ The devlist argument is a list of tuples (disk, new_logical,
+ new_physical). The return value will be a combined boolean result
+ (True only if all renames succeeded).
+
+ """
+ result = True
+ for disk, unique_id in devlist:
+ dev = _RecursiveFindBD(disk)
+ if dev is None:
+ result = False
+ continue
+ try:
+ old_rpath = dev.dev_path
+ dev.Rename(unique_id)
+ new_rpath = dev.dev_path
+ if old_rpath != new_rpath:
+ DevCacheManager.RemoveCache(old_rpath)
+ # FIXME: we should add the new cache information here, like:
+ # DevCacheManager.UpdateCache(new_rpath, owner, ...)
+ # but we don't have the owner here - maybe parse from existing
+ # cache? for now, we only lose lvm data when we rename, which
+ # is less critical than DRBD or MD
+ except errors.BlockDeviceError, err:
+ logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
+ result = False
+ return result
+
+
+def _TransformFileStorageDir(file_storage_dir):
+ """Checks whether given file_storage_dir is valid.
+
+ Checks wheter the given file_storage_dir is within the cluster-wide
+ default file_storage_dir stored in SimpleStore. Only paths under that
+ directory are allowed.
+
+ Args:
+ file_storage_dir: string with path
+
+ Returns:
+ normalized file_storage_dir (string) if valid, None otherwise
+
+ """
+ file_storage_dir = os.path.normpath(file_storage_dir)
+ base_file_storage_dir = ssconf.SimpleStore().GetFileStorageDir()
+ if (not os.path.commonprefix([file_storage_dir, base_file_storage_dir]) ==
+ base_file_storage_dir):
+ logging.error("file storage directory '%s' is not under base file"
+ " storage directory '%s'",
+ file_storage_dir, base_file_storage_dir)
+ return None
+ return file_storage_dir
+
+
+def CreateFileStorageDir(file_storage_dir):
+ """Create file storage directory.
+
+ Args:
+ file_storage_dir: string containing the path
+
+ Returns:
+ tuple with first element a boolean indicating wheter dir
+ creation was successful or not
+
+ """
+ file_storage_dir = _TransformFileStorageDir(file_storage_dir)
+ result = True,
+ if not file_storage_dir:
+ result = False,
+ else:
+ if os.path.exists(file_storage_dir):
+ if not os.path.isdir(file_storage_dir):
+ logging.error("'%s' is not a directory", file_storage_dir)
+ result = False,
+ else:
+ try:
+ os.makedirs(file_storage_dir, 0750)
+ except OSError, err:
+ logging.error("Cannot create file storage directory '%s': %s",
+ file_storage_dir, err)
+ result = False,
+ return result
+
+
+def RemoveFileStorageDir(file_storage_dir):
+ """Remove file storage directory.
+
+ Remove it only if it's empty. If not log an error and return.
+
+ Args:
+ file_storage_dir: string containing the path
+
+ Returns:
+ tuple with first element a boolean indicating wheter dir
+ removal was successful or not
+
+ """
+ file_storage_dir = _TransformFileStorageDir(file_storage_dir)
+ result = True,
+ if not file_storage_dir:
+ result = False,
+ else:
+ if os.path.exists(file_storage_dir):
+ if not os.path.isdir(file_storage_dir):
+ logging.error("'%s' is not a directory", file_storage_dir)
+ result = False,
+ # deletes dir only if empty, otherwise we want to return False
+ try:
+ os.rmdir(file_storage_dir)
+ except OSError, err:
+ logging.exception("Cannot remove file storage directory '%s'",
+ file_storage_dir)
+ result = False,
+ return result
+
+
+def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir):
+ """Rename the file storage directory.
+
+ Args:
+ old_file_storage_dir: string containing the old path
+ new_file_storage_dir: string containing the new path
+
+ Returns:
+ tuple with first element a boolean indicating wheter dir
+ rename was successful or not
+
+ """
+ old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir)
+ new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir)
+ result = True,
+ if not old_file_storage_dir or not new_file_storage_dir:
+ result = False,
+ else:
+ if not os.path.exists(new_file_storage_dir):
+ if os.path.isdir(old_file_storage_dir):
+ try:
+ os.rename(old_file_storage_dir, new_file_storage_dir)
+ except OSError, err:
+ logging.exception("Cannot rename '%s' to '%s'",
+ old_file_storage_dir, new_file_storage_dir)
+ result = False,
+ else:
+ logging.error("'%s' is not a directory", old_file_storage_dir)
+ result = False,
+ else:
+ if os.path.exists(old_file_storage_dir):
+ logging.error("Cannot rename '%s' to '%s'. Both locations exist.",
+ old_file_storage_dir, new_file_storage_dir)
+ result = False,
+ return result
+
+
+def CloseBlockDevices(disks):
+ """Closes the given block devices.
+
+ This means they will be switched to secondary mode (in case of DRBD).
+
+ """
+ bdevs = []
+ for cf in disks:
+ rd = _RecursiveFindBD(cf)
+ if rd is None:
+ return (False, "Can't find device %s" % cf)
+ bdevs.append(rd)
+
+ msg = []
+ for rd in bdevs:
+ try:
+ rd.Close()
+ except errors.BlockDeviceError, err:
+ msg.append(str(err))
+ if msg:
+ return (False, "Can't make devices secondary: %s" % ",".join(msg))
+ else:
+ return (True, "All devices secondary")
+
+
class HooksRunner(object):
"""Hook runner.
Args:
- hooks_base_dir: if not None, this overrides the
constants.HOOKS_BASE_DIR (useful for unittests)
- - logs_base_dir: if not None, this overrides the
- constants.LOG_HOOKS_DIR (useful for unittests)
- - logging: enable or disable logging of script output
"""
if hooks_base_dir is None:
"""Exec one hook script.
Args:
- - phase: the phase
- script: the full path to the script
- env: the environment with which to exec the script
fdstdin = open("/dev/null", "r")
child = subprocess.Popen([script], stdin=fdstdin, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, close_fds=True,
- shell=False, cwd="/",env=env)
+ shell=False, cwd="/", env=env)
output = ""
try:
output = child.stdout.read(4096)
fd.close()
except EnvironmentError, err:
# just log the error
- #logger.Error("While closing fd %s: %s" % (fd, err))
+ #logging.exception("Error while closing fd %s", fd)
pass
return result == 0, output
elif phase == constants.HOOKS_PHASE_POST:
suffix = "post"
else:
- raise errors.ProgrammerError, ("Unknown hooks phase: '%s'" % phase)
+ raise errors.ProgrammerError("Unknown hooks phase: '%s'" % phase)
rr = []
subdir = "%s-%s.d" % (hpath, suffix)
dir_name = "%s/%s" % (self._BASE_DIR, subdir)
try:
- dir_contents = os.listdir(dir_name)
+ dir_contents = utils.ListVisibleFiles(dir_name)
except OSError, err:
# must log
return rr
rr.append(("%s/%s" % (subdir, relname), rrval, output))
return rr
+
+
+class IAllocatorRunner(object):
+ """IAllocator runner.
+
+ This class is instantiated on the node side (ganeti-noded) and not on
+ the master side.
+
+ """
+ def Run(self, name, idata):
+ """Run an iallocator script.
+
+ Return value: tuple of:
+ - run status (one of the IARUN_ constants)
+ - stdout
+ - stderr
+ - fail reason (as from utils.RunResult)
+
+ """
+ alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH,
+ os.path.isfile)
+ if alloc_script is None:
+ return (constants.IARUN_NOTFOUND, None, None, None)
+
+ fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
+ try:
+ os.write(fd, idata)
+ os.close(fd)
+ result = utils.RunCmd([alloc_script, fin_name])
+ if result.failed:
+ return (constants.IARUN_FAILURE, result.stdout, result.stderr,
+ result.fail_reason)
+ finally:
+ os.unlink(fin_name)
+
+ return (constants.IARUN_SUCCESS, result.stdout, result.stderr, None)
+
+
+class DevCacheManager(object):
+ """Simple class for managing a cache of block device information.
+
+ """
+ _DEV_PREFIX = "/dev/"
+ _ROOT_DIR = constants.BDEV_CACHE_DIR
+
+ @classmethod
+ def _ConvertPath(cls, dev_path):
+ """Converts a /dev/name path to the cache file name.
+
+ This replaces slashes with underscores and strips the /dev
+ prefix. It then returns the full path to the cache file
+
+ """
+ if dev_path.startswith(cls._DEV_PREFIX):
+ dev_path = dev_path[len(cls._DEV_PREFIX):]
+ dev_path = dev_path.replace("/", "_")
+ fpath = "%s/bdev_%s" % (cls._ROOT_DIR, dev_path)
+ return fpath
+
+ @classmethod
+ def UpdateCache(cls, dev_path, owner, on_primary, iv_name):
+ """Updates the cache information for a given device.
+
+ """
+ if dev_path is None:
+ logging.error("DevCacheManager.UpdateCache got a None dev_path")
+ return
+ fpath = cls._ConvertPath(dev_path)
+ if on_primary:
+ state = "primary"
+ else:
+ state = "secondary"
+ if iv_name is None:
+ iv_name = "not_visible"
+ fdata = "%s %s %s\n" % (str(owner), state, iv_name)
+ try:
+ utils.WriteFile(fpath, data=fdata)
+ except EnvironmentError, err:
+ logging.exception("Can't update bdev cache for %s", dev_path)
+
+ @classmethod
+ def RemoveCache(cls, dev_path):
+ """Remove data for a dev_path.
+
+ """
+ if dev_path is None:
+ logging.error("DevCacheManager.RemoveCache got a None dev_path")
+ return
+ fpath = cls._ConvertPath(dev_path)
+ try:
+ utils.RemoveFile(fpath)
+ except EnvironmentError, err:
+ logging.exception("Can't update bdev cache for %s", dev_path)
projects / ganeti-local / blobdiff