Synnefo » snf-ganeti » ganeti-local

#

#

# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Google Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

"""Module holding different constants."""

import re

from ganeti import _autoconf

from ganeti import _vcsversion

# various versions

RELEASE_VERSION = _autoconf.PACKAGE_VERSION

OS_API_V10 = 10

OS_API_V15 = 15

OS_API_V20 = 20

OS_API_VERSIONS = frozenset([OS_API_V10, OS_API_V15, OS_API_V20])

VCS_VERSION = _vcsversion.VCS_VERSION

EXPORT_VERSION = 0

RAPI_VERSION = 2

# Format for CONFIG_VERSION:

#   01 03 0123 = 01030123

#   ^^ ^^ ^^^^

#   |  |  + Configuration version/revision

#   |  + Minor version

#   + Major version

#

# It stored as an integer. Make sure not to write an octal number.

# BuildVersion and SplitVersion must be in here because we can't import other

# modules. The cfgupgrade tool must be able to read and write version numbers

# and thus requires these functions. To avoid code duplication, they're kept in

# here.

def BuildVersion(major, minor, revision):

  """Calculates int version number from major, minor and revision numbers.

  Returns: int representing version number

  """

  assert isinstance(major, int)

  assert isinstance(minor, int)

  assert isinstance(revision, int)

  return (1000000 * major +

            10000 * minor +

                1 * revision)

def SplitVersion(version):

  """Splits version number stored in an int.

  Returns: tuple; (major, minor, revision)

  """

  assert isinstance(version, int)

  (major, remainder) = divmod(version, 1000000)

  (minor, revision) = divmod(remainder, 10000)

  return (major, minor, revision)

CONFIG_MAJOR = int(_autoconf.VERSION_MAJOR)

CONFIG_MINOR = int(_autoconf.VERSION_MINOR)

CONFIG_REVISION = 0

CONFIG_VERSION = BuildVersion(CONFIG_MAJOR, CONFIG_MINOR, CONFIG_REVISION)

#: RPC protocol version

PROTOCOL_VERSION = BuildVersion(CONFIG_MAJOR, CONFIG_MINOR, 0)

# user separation

DAEMONS_GROUP = _autoconf.DAEMONS_GROUP

ADMIN_GROUP = _autoconf.ADMIN_GROUP

MASTERD_USER = _autoconf.MASTERD_USER

MASTERD_GROUP = _autoconf.MASTERD_GROUP

RAPI_USER = _autoconf.RAPI_USER

RAPI_GROUP = _autoconf.RAPI_GROUP

CONFD_USER = _autoconf.CONFD_USER

CONFD_GROUP = _autoconf.CONFD_GROUP

NODED_USER = _autoconf.NODED_USER

NODED_GROUP = _autoconf.NODED_GROUP

# cpu pinning separators and constants

CPU_PINNING_SEP = ":"

CPU_PINNING_ALL = "all"

# internal representation of "all"

CPU_PINNING_ALL_VAL = -1

# one "all" entry in a CPU list means CPU pinning is off

CPU_PINNING_OFF = [CPU_PINNING_ALL_VAL]

# A Xen-specific implementation detail - there is no way to actually say

# "use any cpu for pinning" in a Xen configuration file, as opposed to the

# command line, where you can say "xm vcpu-pin <domain> <vcpu> all".

# The workaround used in Xen is "0-63" (see source code function

# xm_vcpu_pin in <xen-source>/tools/python/xen/xm/main.py).

# To support future changes, the following constant is treated as a

# blackbox string that simply means use-any-cpu-for-pinning-under-xen.

CPU_PINNING_ALL_XEN = "0-63"

# A KVM-specific implementation detail - the following value is used

# to set CPU affinity to all processors (#0 through #31), per taskset

# man page.

CPU_PINNING_ALL_KVM = 0xFFFFFFFF

# Wipe

DD_CMD = "dd"

WIPE_BLOCK_SIZE = 1024 ** 2

MAX_WIPE_CHUNK = 1024 # 1GB

MIN_WIPE_CHUNK_PERCENT = 10

# file paths

DATA_DIR = _autoconf.LOCALSTATEDIR + "/lib/ganeti"

RUN_DIR = _autoconf.LOCALSTATEDIR + "/run"

RUN_GANETI_DIR = RUN_DIR + "/ganeti"

BDEV_CACHE_DIR = RUN_GANETI_DIR + "/bdev-cache"

DISK_LINKS_DIR = RUN_GANETI_DIR + "/instance-disks"

RUN_DIRS_MODE = 0775

SOCKET_DIR = RUN_GANETI_DIR + "/socket"

SECURE_DIR_MODE = 0700

SECURE_FILE_MODE = 0600

SOCKET_DIR_MODE = 0750

CRYPTO_KEYS_DIR = RUN_GANETI_DIR + "/crypto"

CRYPTO_KEYS_DIR_MODE = SECURE_DIR_MODE

IMPORT_EXPORT_DIR = RUN_GANETI_DIR + "/import-export"

IMPORT_EXPORT_DIR_MODE = 0755

ADOPTABLE_BLOCKDEV_ROOT = "/dev/disk/"

# keep RUN_GANETI_DIR first here, to make sure all get created when the node

# daemon is started (this takes care of RUN_DIR being tmpfs)

SUB_RUN_DIRS = [

  RUN_GANETI_DIR,

  BDEV_CACHE_DIR,

  DISK_LINKS_DIR,

  ]

LOCK_DIR = _autoconf.LOCALSTATEDIR + "/lock"

SSCONF_LOCK_FILE = LOCK_DIR + "/ganeti-ssconf.lock"

# User-id pool lock directory

# The user-ids that are in use have a corresponding lock file in this directory

UIDPOOL_LOCKDIR = RUN_GANETI_DIR + "/uid-pool"

CLUSTER_CONF_FILE = DATA_DIR + "/config.data"

NODED_CERT_FILE = DATA_DIR + "/server.pem"

RAPI_CERT_FILE = DATA_DIR + "/rapi.pem"

CONFD_HMAC_KEY = DATA_DIR + "/hmac.key"

SPICE_CERT_FILE = DATA_DIR + "/spice.pem"

SPICE_CACERT_FILE = DATA_DIR + "/spice-ca.pem"

CLUSTER_DOMAIN_SECRET_FILE = DATA_DIR + "/cluster-domain-secret"

INSTANCE_STATUS_FILE = RUN_GANETI_DIR + "/instance-status"

SSH_KNOWN_HOSTS_FILE = DATA_DIR + "/known_hosts"

RAPI_USERS_FILE = DATA_DIR + "/rapi/users"

QUEUE_DIR = DATA_DIR + "/queue"

DAEMON_UTIL = _autoconf.PKGLIBDIR + "/daemon-util"

SETUP_SSH = _autoconf.TOOLSDIR + "/setup-ssh"

KVM_IFUP = _autoconf.PKGLIBDIR + "/kvm-ifup"

KVM_CONSOLE_WRAPPER = _autoconf.PKGLIBDIR + "/tools/kvm-console-wrapper"

XM_CONSOLE_WRAPPER = _autoconf.PKGLIBDIR + "/tools/xm-console-wrapper"

ETC_HOSTS = "/etc/hosts"

DEFAULT_FILE_STORAGE_DIR = _autoconf.FILE_STORAGE_DIR

DEFAULT_SHARED_FILE_STORAGE_DIR = _autoconf.SHARED_FILE_STORAGE_DIR

ENABLE_FILE_STORAGE = _autoconf.ENABLE_FILE_STORAGE

ENABLE_SHARED_FILE_STORAGE = _autoconf.ENABLE_SHARED_FILE_STORAGE

SYSCONFDIR = _autoconf.SYSCONFDIR

TOOLSDIR = _autoconf.TOOLSDIR

CONF_DIR = SYSCONFDIR + "/ganeti"

USER_SCRIPTS_DIR = CONF_DIR + "/scripts"

ENABLE_CONFD = _autoconf.ENABLE_CONFD

#: Lock file for watcher, locked in shared mode by watcher; lock in exclusive

# mode to block watcher (see L{cli._RunWhileClusterStoppedHelper.Call}

WATCHER_LOCK_FILE = LOCK_DIR + "/ganeti-watcher.lock"

#: Status file for per-group watcher, locked in exclusive mode by watcher

WATCHER_GROUP_STATE_FILE = DATA_DIR + "/watcher.%s.data"

#: File for per-group instance status, merged into L{INSTANCE_STATUS_FILE} by

#: per-group processes

WATCHER_GROUP_INSTANCE_STATUS_FILE = DATA_DIR + "/watcher.%s.instance-status"

#: File containing Unix timestamp until which watcher should be paused

WATCHER_PAUSEFILE = DATA_DIR + "/watcher.pause"

# Master IP address setup scripts paths (default and user-provided)

DEFAULT_MASTER_SETUP_SCRIPT = TOOLSDIR + "/master-ip-setup"

EXTERNAL_MASTER_SETUP_SCRIPT = USER_SCRIPTS_DIR + "/master-ip-setup"

ALL_CERT_FILES = frozenset([

  NODED_CERT_FILE,

  RAPI_CERT_FILE,

  SPICE_CERT_FILE,

  SPICE_CACERT_FILE,

  ])

MASTER_SOCKET = SOCKET_DIR + "/ganeti-master"

NODED = "ganeti-noded"

CONFD = "ganeti-confd"

RAPI = "ganeti-rapi"

MASTERD = "ganeti-masterd"

# used in the ganeti-nbma project

NLD = "ganeti-nld"

DAEMONS_PORTS = {

  # daemon-name: ("proto", "default-port")

  NODED: ("tcp", 1811),

  CONFD: ("udp", 1814),

  RAPI: ("tcp", 5080),

  "ssh": ("tcp", 22),

  # used in the ganeti-nbma project

  NLD: ("udp", 1816),

}

DEFAULT_NODED_PORT = DAEMONS_PORTS[NODED][1]

DEFAULT_CONFD_PORT = DAEMONS_PORTS[CONFD][1]

DEFAULT_RAPI_PORT = DAEMONS_PORTS[RAPI][1]

# used in the ganeti-nbma project

DEFAULT_NLD_PORT = DAEMONS_PORTS[NLD][1]

FIRST_DRBD_PORT = 11000

LAST_DRBD_PORT = 14999

MASTER_SCRIPT = "ganeti-master"

LOG_DIR = _autoconf.LOCALSTATEDIR + "/log/ganeti/"

DAEMONS_LOGFILES = {

  # "daemon-name": "logfile"

  NODED: LOG_DIR + "node-daemon.log",

  CONFD: LOG_DIR + "conf-daemon.log",

  RAPI: LOG_DIR + "rapi-daemon.log",

  MASTERD: LOG_DIR + "master-daemon.log",

  # used in the ganeti-nbma project

  NLD: LOG_DIR + "nl-daemon.log",

  }

LOG_OS_DIR = LOG_DIR + "os"

LOG_WATCHER = LOG_DIR + "watcher.log"

LOG_COMMANDS = LOG_DIR + "commands.log"

LOG_BURNIN = LOG_DIR + "burnin.log"

LOG_SETUP_SSH = LOG_DIR + "setup-ssh.log"

DEV_CONSOLE = "/dev/console"

PROC_MOUNTS = "/proc/mounts"

# Local UniX Interface related constants

LUXI_EOM = "\3"

LUXI_VERSION = CONFIG_VERSION

# one of "no", "yes", "only"

SYSLOG_USAGE = _autoconf.SYSLOG_USAGE

SYSLOG_NO = "no"

SYSLOG_YES = "yes"

SYSLOG_ONLY = "only"

SYSLOG_SOCKET = "/dev/log"

OS_SEARCH_PATH = _autoconf.OS_SEARCH_PATH

EXPORT_DIR = _autoconf.EXPORT_DIR

EXPORT_CONF_FILE = "config.ini"

XEN_BOOTLOADER = _autoconf.XEN_BOOTLOADER

XEN_KERNEL = _autoconf.XEN_KERNEL

XEN_INITRD = _autoconf.XEN_INITRD

XEN_CMD = "xm"

KVM_PATH = _autoconf.KVM_PATH

SOCAT_PATH = _autoconf.SOCAT_PATH

SOCAT_USE_ESCAPE = _autoconf.SOCAT_USE_ESCAPE

SOCAT_USE_COMPRESS = _autoconf.SOCAT_USE_COMPRESS

SOCAT_ESCAPE_CODE = "0x1d"

#: Console as SSH command

CONS_SSH = "ssh"

#: Console as VNC server

CONS_VNC = "vnc"

#: Console as SPICE server

CONS_SPICE = "spice"

#: Display a message for console access

CONS_MESSAGE = "msg"

#: All console types

CONS_ALL = frozenset([CONS_SSH, CONS_VNC, CONS_SPICE, CONS_MESSAGE])

# For RSA keys more bits are better, but they also make operations more

# expensive. NIST SP 800-131 recommends a minimum of 2048 bits from the year

# 2010 on.

RSA_KEY_BITS = 2048

# Ciphers allowed for SSL connections. For the format, see ciphers(1). A better

# way to disable ciphers would be to use the exclamation mark (!), but socat

# versions below 1.5 can't parse exclamation marks in options properly. When

# modifying the ciphers, ensure not to accidentially add something after it's

# been removed. Use the "openssl" utility to check the allowed ciphers, e.g.

# "openssl ciphers -v HIGH:-DES".

OPENSSL_CIPHERS = "HIGH:-DES:-3DES:-EXPORT:-ADH"

# Digest used to sign certificates ("openssl x509" uses SHA1 by default)

X509_CERT_SIGN_DIGEST = "SHA1"

# Default validity of certificates in days

X509_CERT_DEFAULT_VALIDITY = 365 * 5

# commonName (CN) used in certificates

X509_CERT_CN = "ganeti.example.com"

X509_CERT_SIGNATURE_HEADER = "X-Ganeti-Signature"

IMPORT_EXPORT_DAEMON = _autoconf.PKGLIBDIR + "/import-export"

# Import/export daemon mode

IEM_IMPORT = "import"

IEM_EXPORT = "export"

# Import/export transport compression

IEC_NONE = "none"

IEC_GZIP = "gzip"

IEC_ALL = frozenset([

  IEC_NONE,

  IEC_GZIP,

  ])

IE_CUSTOM_SIZE = "fd"

IE_MAGIC_RE = re.compile(r"^[-_.a-zA-Z0-9]{5,100}$")

# Import/export I/O

# Direct file I/O, equivalent to a shell's I/O redirection using '<' or '>'

IEIO_FILE = "file"

# Raw block device I/O using "dd"

IEIO_RAW_DISK = "raw"

# OS definition import/export script

IEIO_SCRIPT = "script"

VALUE_DEFAULT = "default"

VALUE_AUTO = "auto"

VALUE_GENERATE = "generate"

VALUE_NONE = "none"

VALUE_TRUE = "true"

VALUE_FALSE = "false"

# External script validation mask

EXT_PLUGIN_MASK = re.compile("^[a-zA-Z0-9_-]+$")

# hooks-related constants

HOOKS_BASE_DIR = CONF_DIR + "/hooks"

HOOKS_PHASE_PRE = "pre"

HOOKS_PHASE_POST = "post"

HOOKS_NAME_CFGUPDATE = "config-update"

HOOKS_NAME_WATCHER = "watcher"

HOOKS_VERSION = 2

HOOKS_PATH = "/sbin:/bin:/usr/sbin:/usr/bin"

# hooks subject type (what object type does the LU deal with)

HTYPE_CLUSTER = "CLUSTER"

HTYPE_NODE = "NODE"

HTYPE_GROUP = "GROUP"

HTYPE_INSTANCE = "INSTANCE"

HKR_SKIP = 0

HKR_FAIL = 1

HKR_SUCCESS = 2

# Storage types

ST_FILE = "file"

ST_LVM_PV = "lvm-pv"

ST_LVM_VG = "lvm-vg"

# Storage fields

# first two are valid in LU context only, not passed to backend

SF_NODE = "node"

SF_TYPE = "type"

# and the rest are valid in backend

SF_NAME = "name"

SF_SIZE = "size"

SF_FREE = "free"

SF_USED = "used"

SF_ALLOCATABLE = "allocatable"

# Storage operations

SO_FIX_CONSISTENCY = "fix-consistency"

# Available fields per storage type

VALID_STORAGE_FIELDS = frozenset([

  SF_NAME,

  SF_TYPE,

  SF_SIZE,

  SF_USED,

  SF_FREE,

  SF_ALLOCATABLE

  ])

VALID_STORAGE_TYPES = frozenset([ST_FILE, ST_LVM_PV, ST_LVM_VG])

MODIFIABLE_STORAGE_FIELDS = {

  ST_LVM_PV: frozenset([SF_ALLOCATABLE]),

  }

VALID_STORAGE_OPERATIONS = {

  ST_LVM_VG: frozenset([SO_FIX_CONSISTENCY]),

  }

# Local disk status

# Note: Code depends on LDS_OKAY < LDS_UNKNOWN < LDS_FAULTY

(LDS_OKAY,

 LDS_UNKNOWN,

 LDS_FAULTY) = range(1, 4)

# disk template types

DT_DISKLESS = "diskless"

DT_PLAIN = "plain"

DT_DRBD8 = "drbd"

DT_FILE = "file"

DT_SHARED_FILE = "sharedfile"

DT_BLOCK = "blockdev"

DT_RBD = "rbd"

# the set of network-mirrored disk templates

DTS_INT_MIRROR = frozenset([DT_DRBD8])

# the set of externally-mirrored disk templates (e.g. SAN, NAS)

DTS_EXT_MIRROR = frozenset([DT_SHARED_FILE, DT_BLOCK, DT_RBD])

# the set of non-lvm-based disk templates

DTS_NOT_LVM = frozenset([DT_DISKLESS, DT_FILE, DT_SHARED_FILE,

                         DT_BLOCK, DT_RBD])

# the set of disk templates which can be grown

DTS_GROWABLE = frozenset([DT_PLAIN, DT_DRBD8, DT_FILE, DT_SHARED_FILE, DT_RBD])

# the set of disk templates that allow adoption

DTS_MAY_ADOPT = frozenset([DT_PLAIN, DT_BLOCK])

# the set of disk templates that *must* use adoption

DTS_MUST_ADOPT = frozenset([DT_BLOCK])

# the set of disk templates that allow migrations

DTS_MIRRORED = frozenset.union(DTS_INT_MIRROR, DTS_EXT_MIRROR)

# the set of file based disk templates

DTS_FILEBASED = frozenset([DT_FILE, DT_SHARED_FILE])

# logical disk types

LD_LV = "lvm"

LD_DRBD8 = "drbd8"

LD_FILE = "file"

LD_BLOCKDEV = "blockdev"

LD_RBD = "rbd"

LOGICAL_DISK_TYPES = frozenset([

  LD_LV,

  LD_DRBD8,

  LD_FILE,

  LD_BLOCKDEV,

  LD_RBD,

  ])

LDS_BLOCK = frozenset([LD_LV, LD_DRBD8, LD_BLOCKDEV, LD_RBD])

# drbd constants

DRBD_HMAC_ALG = "md5"

DRBD_NET_PROTOCOL = "C"

# drbd barrier types

DRBD_B_NONE = "n"

DRBD_B_DISK_BARRIERS = "b"

DRBD_B_DISK_DRAIN = "d"

DRBD_B_DISK_FLUSH = "f"

# Valid barrier combinations: "n" or any non-null subset of "bfd"

DRBD_VALID_BARRIER_OPT = frozenset([

  frozenset([DRBD_B_NONE]),

  frozenset([DRBD_B_DISK_BARRIERS]),

  frozenset([DRBD_B_DISK_DRAIN]),

  frozenset([DRBD_B_DISK_FLUSH]),

  frozenset([DRBD_B_DISK_DRAIN, DRBD_B_DISK_FLUSH]),

  frozenset([DRBD_B_DISK_DRAIN, DRBD_B_DISK_FLUSH]),

  frozenset([DRBD_B_DISK_BARRIERS, DRBD_B_DISK_DRAIN]),

  frozenset([DRBD_B_DISK_BARRIERS, DRBD_B_DISK_FLUSH]),

  frozenset([DRBD_B_DISK_BARRIERS, DRBD_B_DISK_FLUSH, DRBD_B_DISK_DRAIN]),

  ])

# rbd tool command

RBD_CMD = "rbd"

# file backend driver

FD_LOOP = "loop"

FD_BLKTAP = "blktap"

# the set of drbd-like disk types

LDS_DRBD = frozenset([LD_DRBD8])

# disk access mode

DISK_RDONLY = "ro"

DISK_RDWR = "rw"

DISK_ACCESS_SET = frozenset([DISK_RDONLY, DISK_RDWR])

# disk replacement mode

REPLACE_DISK_PRI = "replace_on_primary"    # replace disks on primary

REPLACE_DISK_SEC = "replace_on_secondary"  # replace disks on secondary

REPLACE_DISK_CHG = "replace_new_secondary" # change secondary node

REPLACE_DISK_AUTO = "replace_auto"

REPLACE_MODES = frozenset([

  REPLACE_DISK_PRI,

  REPLACE_DISK_SEC,

  REPLACE_DISK_CHG,

  REPLACE_DISK_AUTO,

  ])

# Instance export mode

EXPORT_MODE_LOCAL = "local"

EXPORT_MODE_REMOTE = "remote"

EXPORT_MODES = frozenset([

  EXPORT_MODE_LOCAL,

  EXPORT_MODE_REMOTE,

  ])

# Lock recalculate mode

LOCKS_REPLACE = "replace"

LOCKS_APPEND = "append"

# Lock timeout (sum) before we should go into blocking acquire (still

# can be reset by priority change); computed as max time (10 hours)

# before we should actually go into blocking acquire given that we

# start from default priority level; in seconds

LOCK_ATTEMPTS_TIMEOUT = 10 * 3600 / 20.0

LOCK_ATTEMPTS_MAXWAIT = 15.0

LOCK_ATTEMPTS_MINWAIT = 1.0

# instance creation modes

INSTANCE_CREATE = "create"

INSTANCE_IMPORT = "import"

INSTANCE_REMOTE_IMPORT = "remote-import"

INSTANCE_CREATE_MODES = frozenset([

  INSTANCE_CREATE,

  INSTANCE_IMPORT,

  INSTANCE_REMOTE_IMPORT,

  ])

# Remote import/export handshake message and version

RIE_VERSION = 0

RIE_HANDSHAKE = "Hi, I'm Ganeti"

# Remote import/export certificate validity in seconds

RIE_CERT_VALIDITY = 24 * 60 * 60

# Overall timeout for establishing connection

RIE_CONNECT_TIMEOUT = 180

# Export only: how long to wait per connection attempt (seconds)

RIE_CONNECT_ATTEMPT_TIMEOUT = 20

# Export only: number of attempts to connect

RIE_CONNECT_RETRIES = 10

#: Give child process up to 5 seconds to exit after sending a signal

CHILD_LINGER_TIMEOUT = 5.0

DISK_TEMPLATES = frozenset([

  DT_DISKLESS,

  DT_PLAIN,

  DT_DRBD8,

  DT_FILE,

  DT_SHARED_FILE,

  DT_BLOCK,

  DT_RBD

  ])

FILE_DRIVER = frozenset([FD_LOOP, FD_BLKTAP])

# import/export config options

INISECT_EXP = "export"

INISECT_INS = "instance"

INISECT_HYP = "hypervisor"

INISECT_BEP = "backend"

INISECT_OSP = "os"

# dynamic device modification

DDM_ADD = "add"

DDM_REMOVE = "remove"

DDMS_VALUES = frozenset([DDM_ADD, DDM_REMOVE])

# common exit codes

EXIT_SUCCESS = 0

EXIT_FAILURE = 1

EXIT_NOTCLUSTER = 5

EXIT_NOTMASTER = 11

EXIT_NODESETUP_ERROR = 12

EXIT_CONFIRMATION = 13 # need user confirmation

#: Exit code for query operations with unknown fields

EXIT_UNKNOWN_FIELD = 14

# tags

TAG_CLUSTER = "cluster"

TAG_NODEGROUP = "nodegroup"

TAG_NODE = "node"

TAG_INSTANCE = "instance"

VALID_TAG_TYPES = frozenset([

  TAG_CLUSTER,

  TAG_NODEGROUP,

  TAG_NODE,

  TAG_INSTANCE,

  ])

MAX_TAG_LEN = 128

MAX_TAGS_PER_OBJ = 4096

# others

DEFAULT_BRIDGE = "xen-br0"

CLASSIC_DRBD_SYNC_SPEED = 60 * 1024  # 60 MiB, expressed in KiB

IP4_ADDRESS_LOCALHOST = "127.0.0.1"

IP4_ADDRESS_ANY = "0.0.0.0"

IP6_ADDRESS_LOCALHOST = "::1"

IP6_ADDRESS_ANY = "::"

IP4_VERSION = 4

IP6_VERSION = 6

VALID_IP_VERSIONS = frozenset([IP4_VERSION, IP6_VERSION])

TCP_PING_TIMEOUT = 10

GANETI_RUNAS = "root"

DEFAULT_VG = "xenvg"

DEFAULT_DRBD_HELPER = "/bin/true"

MIN_VG_SIZE = 20480

DEFAULT_MAC_PREFIX = "aa:00:00"

# default maximum instance wait time, in seconds.

DEFAULT_SHUTDOWN_TIMEOUT = 120

NODE_MAX_CLOCK_SKEW = 150

# Time for an intra-cluster disk transfer to wait for a connection

DISK_TRANSFER_CONNECT_TIMEOUT = 60

# Disk index separator

DISK_SEPARATOR = _autoconf.DISK_SEPARATOR

IP_COMMAND_PATH = _autoconf.IP_PATH

#: Key for job IDs in opcode result

JOB_IDS_KEY = "jobs"

# runparts results

(RUNPARTS_SKIP,

 RUNPARTS_RUN,

 RUNPARTS_ERR) = range(3)

RUNPARTS_STATUS = frozenset([RUNPARTS_SKIP, RUNPARTS_RUN, RUNPARTS_ERR])

# RPC constants

(RPC_ENCODING_NONE,

 RPC_ENCODING_ZLIB_BASE64) = range(2)

# os related constants

OS_SCRIPT_CREATE = "create"

OS_SCRIPT_IMPORT = "import"

OS_SCRIPT_EXPORT = "export"

OS_SCRIPT_RENAME = "rename"

OS_SCRIPT_VERIFY = "verify"

OS_SCRIPTS = frozenset([

  OS_SCRIPT_CREATE,

  OS_SCRIPT_IMPORT,

  OS_SCRIPT_EXPORT,

  OS_SCRIPT_RENAME,

  OS_SCRIPT_VERIFY

  ])

OS_API_FILE = "ganeti_api_version"

OS_VARIANTS_FILE = "variants.list"

OS_PARAMETERS_FILE = "parameters.list"

OS_VALIDATE_PARAMETERS = "parameters"

OS_VALIDATE_CALLS = frozenset([OS_VALIDATE_PARAMETERS])

# ssh constants

SSH_CONFIG_DIR = _autoconf.SSH_CONFIG_DIR

SSH_HOST_DSA_PRIV = SSH_CONFIG_DIR + "/ssh_host_dsa_key"

SSH_HOST_DSA_PUB = SSH_HOST_DSA_PRIV + ".pub"

SSH_HOST_RSA_PRIV = SSH_CONFIG_DIR + "/ssh_host_rsa_key"

SSH_HOST_RSA_PUB = SSH_HOST_RSA_PRIV + ".pub"

SSH = "ssh"

SCP = "scp"

# reboot types

INSTANCE_REBOOT_SOFT = "soft"

INSTANCE_REBOOT_HARD = "hard"

INSTANCE_REBOOT_FULL = "full"

REBOOT_TYPES = frozenset([

  INSTANCE_REBOOT_SOFT,

  INSTANCE_REBOOT_HARD,

  INSTANCE_REBOOT_FULL

  ])

# instance reboot behaviors

INSTANCE_REBOOT_ALLOWED = "reboot"

INSTANCE_REBOOT_EXIT = "exit"

REBOOT_BEHAVIORS = frozenset([

  INSTANCE_REBOOT_ALLOWED,

  INSTANCE_REBOOT_EXIT

  ])

VTYPE_STRING = "string"

VTYPE_MAYBE_STRING = "maybe-string"

VTYPE_BOOL = "bool"

VTYPE_SIZE = "size" # size, in MiBs

VTYPE_INT = "int"

ENFORCEABLE_TYPES = frozenset([

  VTYPE_STRING,

  VTYPE_MAYBE_STRING,

  VTYPE_BOOL,

  VTYPE_SIZE,

  VTYPE_INT,

  ])

# Constant representing that the user does not specify any IP version

IFACE_NO_IP_VERSION_SPECIFIED = 0

# HV parameter names (global namespace)

HV_BOOT_ORDER = "boot_order"

HV_CDROM_IMAGE_PATH = "cdrom_image_path"

HV_KVM_CDROM2_IMAGE_PATH = "cdrom2_image_path"

HV_KVM_FLOPPY_IMAGE_PATH = "floppy_image_path"

HV_NIC_TYPE = "nic_type"

HV_DISK_TYPE = "disk_type"

HV_KVM_CDROM_DISK_TYPE = "cdrom_disk_type"

HV_VNC_BIND_ADDRESS = "vnc_bind_address"

HV_VNC_PASSWORD_FILE = "vnc_password_file"

HV_VNC_TLS = "vnc_tls"

HV_VNC_X509 = "vnc_x509_path"

HV_VNC_X509_VERIFY = "vnc_x509_verify"

HV_KVM_SPICE_BIND = "spice_bind"

HV_KVM_SPICE_IP_VERSION = "spice_ip_version"

HV_KVM_SPICE_PASSWORD_FILE = "spice_password_file"

HV_KVM_SPICE_LOSSLESS_IMG_COMPR = "spice_image_compression"

HV_KVM_SPICE_JPEG_IMG_COMPR = "spice_jpeg_wan_compression"

HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR = "spice_zlib_glz_wan_compression"

HV_KVM_SPICE_STREAMING_VIDEO_DETECTION = "spice_streaming_video"

HV_KVM_SPICE_AUDIO_COMPR = "spice_playback_compression"

HV_KVM_SPICE_USE_TLS = "spice_use_tls"

HV_KVM_SPICE_TLS_CIPHERS = "spice_tls_ciphers"

HV_KVM_SPICE_USE_VDAGENT = "spice_use_vdagent"

HV_ACPI = "acpi"

HV_PAE = "pae"

HV_USE_BOOTLOADER = "use_bootloader"

HV_BOOTLOADER_ARGS = "bootloader_args"

HV_BOOTLOADER_PATH = "bootloader_path"

HV_KERNEL_ARGS = "kernel_args"

HV_KERNEL_PATH = "kernel_path"

HV_INITRD_PATH = "initrd_path"

HV_ROOT_PATH = "root_path"

HV_SERIAL_CONSOLE = "serial_console"

HV_USB_MOUSE = "usb_mouse"

HV_KEYMAP = "keymap"

HV_DEVICE_MODEL = "device_model"

HV_INIT_SCRIPT = "init_script"

HV_MIGRATION_PORT = "migration_port"

HV_MIGRATION_BANDWIDTH = "migration_bandwidth"

HV_MIGRATION_DOWNTIME = "migration_downtime"

HV_MIGRATION_MODE = "migration_mode"

HV_USE_LOCALTIME = "use_localtime"

HV_DISK_CACHE = "disk_cache"

HV_SECURITY_MODEL = "security_model"

HV_SECURITY_DOMAIN = "security_domain"

HV_KVM_FLAG = "kvm_flag"

HV_VHOST_NET = "vhost_net"

HV_KVM_USE_CHROOT = "use_chroot"

HV_CPU_MASK = "cpu_mask"

HV_MEM_PATH = "mem_path"

HV_BLOCKDEV_PREFIX = "blockdev_prefix"

HV_REBOOT_BEHAVIOR = "reboot_behavior"

HVS_PARAMETER_TYPES = {

  HV_BOOT_ORDER: VTYPE_STRING,

  HV_KVM_FLOPPY_IMAGE_PATH: VTYPE_STRING,

  HV_CDROM_IMAGE_PATH: VTYPE_STRING,

  HV_KVM_CDROM2_IMAGE_PATH: VTYPE_STRING,

  HV_NIC_TYPE: VTYPE_STRING,

  HV_DISK_TYPE: VTYPE_STRING,

  HV_KVM_CDROM_DISK_TYPE: VTYPE_STRING,

  HV_VNC_PASSWORD_FILE: VTYPE_STRING,

  HV_VNC_BIND_ADDRESS: VTYPE_STRING,

  HV_VNC_TLS: VTYPE_BOOL,

  HV_VNC_X509: VTYPE_STRING,

  HV_VNC_X509_VERIFY: VTYPE_BOOL,

  HV_KVM_SPICE_BIND: VTYPE_STRING,

  HV_KVM_SPICE_IP_VERSION: VTYPE_INT,

  HV_KVM_SPICE_PASSWORD_FILE: VTYPE_STRING,

  HV_KVM_SPICE_LOSSLESS_IMG_COMPR: VTYPE_STRING,

  HV_KVM_SPICE_JPEG_IMG_COMPR: VTYPE_STRING,

  HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR: VTYPE_STRING,

  HV_KVM_SPICE_STREAMING_VIDEO_DETECTION: VTYPE_STRING,

  HV_KVM_SPICE_AUDIO_COMPR: VTYPE_BOOL,

  HV_KVM_SPICE_USE_TLS: VTYPE_BOOL,

  HV_KVM_SPICE_TLS_CIPHERS: VTYPE_STRING,

  HV_KVM_SPICE_USE_VDAGENT: VTYPE_BOOL,

  HV_ACPI: VTYPE_BOOL,

  HV_PAE: VTYPE_BOOL,

  HV_USE_BOOTLOADER: VTYPE_BOOL,

  HV_BOOTLOADER_PATH: VTYPE_STRING,

  HV_BOOTLOADER_ARGS: VTYPE_STRING,

  HV_KERNEL_PATH: VTYPE_STRING,

  HV_KERNEL_ARGS: VTYPE_STRING,

  HV_INITRD_PATH: VTYPE_STRING,

  HV_ROOT_PATH: VTYPE_MAYBE_STRING,

  HV_SERIAL_CONSOLE: VTYPE_BOOL,

  HV_USB_MOUSE: VTYPE_STRING,

  HV_KEYMAP: VTYPE_STRING,

  HV_DEVICE_MODEL: VTYPE_STRING,

  HV_INIT_SCRIPT: VTYPE_STRING,

  HV_MIGRATION_PORT: VTYPE_INT,

  HV_MIGRATION_BANDWIDTH: VTYPE_INT,

  HV_MIGRATION_DOWNTIME: VTYPE_INT,

  HV_MIGRATION_MODE: VTYPE_STRING,

  HV_USE_LOCALTIME: VTYPE_BOOL,

  HV_DISK_CACHE: VTYPE_STRING,

  HV_SECURITY_MODEL: VTYPE_STRING,

  HV_SECURITY_DOMAIN: VTYPE_STRING,

  HV_KVM_FLAG: VTYPE_STRING,

  HV_VHOST_NET: VTYPE_BOOL,

  HV_KVM_USE_CHROOT: VTYPE_BOOL,

  HV_CPU_MASK: VTYPE_STRING,

  HV_MEM_PATH: VTYPE_STRING,

  HV_BLOCKDEV_PREFIX: VTYPE_STRING,

  HV_REBOOT_BEHAVIOR: VTYPE_STRING,

  }

HVS_PARAMETERS = frozenset(HVS_PARAMETER_TYPES.keys())

# Migration statuses

HV_MIGRATION_COMPLETED = "completed"

HV_MIGRATION_ACTIVE = "active"

HV_MIGRATION_FAILED = "failed"

HV_MIGRATION_CANCELLED = "cancelled"

HV_MIGRATION_VALID_STATUSES = frozenset([

  HV_MIGRATION_COMPLETED,

  HV_MIGRATION_ACTIVE,

  HV_MIGRATION_FAILED,

  HV_MIGRATION_CANCELLED,

  ])

HV_MIGRATION_FAILED_STATUSES = frozenset([

  HV_MIGRATION_FAILED,

  HV_MIGRATION_CANCELLED,

  ])

# KVM-specific statuses

HV_KVM_MIGRATION_VALID_STATUSES = HV_MIGRATION_VALID_STATUSES

# Node info keys

HV_NODEINFO_KEY_VERSION = "hv_version"

# Hypervisor state

HVST_MEMORY_TOTAL = "mem_total"

HVST_MEMORY_NODE = "mem_node"

HVST_MEMORY_HV = "mem_hv"

HVST_CPU_TOTAL = "cpu_total"

HVST_CPU_NODE = "cpu_node"

HVST_DEFAULTS = {

  HVST_MEMORY_TOTAL: 0,

  HVST_MEMORY_NODE: 0,

  HVST_MEMORY_HV: 0,

  HVST_CPU_TOTAL: 1,

  HVST_CPU_NODE: 1,

  }

HVSTS_PARAMETER_TYPES = {

  HVST_MEMORY_TOTAL: VTYPE_INT,

  HVST_MEMORY_NODE: VTYPE_INT,

  HVST_MEMORY_HV: VTYPE_INT,

  HVST_CPU_TOTAL: VTYPE_INT,

  HVST_CPU_NODE: VTYPE_INT,

  }

HVSTS_PARAMETERS = frozenset(HVSTS_PARAMETER_TYPES.keys())

# Disk state

DS_DISK_TOTAL = "disk_total"

DS_DISK_RESERVED = "disk_reserved"

DS_DISK_OVERHEAD = "disk_overhead"

DS_DEFAULTS = {

  DS_DISK_TOTAL: 0,

  DS_DISK_RESERVED: 0,

  DS_DISK_OVERHEAD: 0,

  }

DSS_PARAMETER_TYPES = {

  DS_DISK_TOTAL: VTYPE_INT,

  DS_DISK_RESERVED: VTYPE_INT,

  DS_DISK_OVERHEAD: VTYPE_INT,

  }

DSS_PARAMETERS = frozenset(DSS_PARAMETER_TYPES.keys())

DS_VALID_TYPES = frozenset([LD_LV])

# Backend parameter names

BE_MEMORY = "memory" # deprecated and replaced by max and min mem

BE_MAXMEM = "maxmem"

BE_MINMEM = "minmem"

BE_VCPUS = "vcpus"

BE_AUTO_BALANCE = "auto_balance"

BE_ALWAYS_FAILOVER = "always_failover"

BES_PARAMETER_TYPES = {

  BE_MAXMEM: VTYPE_SIZE,

  BE_MINMEM: VTYPE_SIZE,

  BE_VCPUS: VTYPE_INT,

  BE_AUTO_BALANCE: VTYPE_BOOL,

  BE_ALWAYS_FAILOVER: VTYPE_BOOL,

  }

BES_PARAMETER_COMPAT = {

  BE_MEMORY: VTYPE_SIZE,

  }

BES_PARAMETER_COMPAT.update(BES_PARAMETER_TYPES)

BES_PARAMETERS = frozenset(BES_PARAMETER_TYPES.keys())

# instance specs

ISPEC_MEM_SIZE = "memory-size"

ISPEC_CPU_COUNT = "cpu-count"

ISPEC_DISK_COUNT = "disk-count"

ISPEC_DISK_SIZE = "disk-size"

ISPEC_NIC_COUNT = "nic-count"

ISPECS_PARAMETER_TYPES = {

  ISPEC_MEM_SIZE: VTYPE_INT,

  ISPEC_CPU_COUNT: VTYPE_INT,

  ISPEC_DISK_COUNT: VTYPE_INT,

  ISPEC_DISK_SIZE: VTYPE_INT,

  ISPEC_NIC_COUNT: VTYPE_INT,

  }

ISPECS_PARAMETERS = frozenset(ISPECS_PARAMETER_TYPES.keys())

ISPECS_MIN = "min"

ISPECS_MAX = "max"

ISPECS_STD = "std"

IPOLICY_DTS = "disk_templates"

IPOLICY_PARAMETERS = frozenset([

  ISPECS_MIN,

  ISPECS_MAX,

  ISPECS_STD,

  ])

IPOLICY_ALL_KEYS = IPOLICY_PARAMETERS.union([IPOLICY_DTS])

# Node parameter names

ND_OOB_PROGRAM = "oob_program"

NDS_PARAMETER_TYPES = {

  ND_OOB_PROGRAM: VTYPE_MAYBE_STRING,

  }

NDS_PARAMETERS = frozenset(NDS_PARAMETER_TYPES.keys())

# Logical Disks parameters

LDP_RESYNC_RATE = "resync-rate"

LDP_STRIPES = "stripes"

LDP_BARRIERS = "disabled-barriers"

LDP_NO_META_FLUSH = "disable-meta-flush"

LDP_DEFAULT_METAVG = "default-metavg"

LDP_DISK_CUSTOM = "disk-custom"

LDP_NET_CUSTOM = "net-custom"

LDP_DYNAMIC_RESYNC = "dynamic-resync"

LDP_PLAN_AHEAD = "c-plan-ahead"

LDP_FILL_TARGET = "c-fill-target"

LDP_DELAY_TARGET = "c-delay-target"

LDP_MAX_RATE = "c-max-rate"

LDP_MIN_RATE = "c-min-rate"

LDP_POOL = "pool"

DISK_LD_TYPES = {

  LDP_RESYNC_RATE: VTYPE_INT,

  LDP_STRIPES: VTYPE_INT,

  LDP_BARRIERS: VTYPE_STRING,

  LDP_NO_META_FLUSH: VTYPE_BOOL,

  LDP_DEFAULT_METAVG: VTYPE_STRING,

  LDP_DISK_CUSTOM: VTYPE_STRING,

  LDP_NET_CUSTOM: VTYPE_STRING,

  LDP_DYNAMIC_RESYNC: VTYPE_BOOL,

  LDP_PLAN_AHEAD: VTYPE_INT,

  LDP_FILL_TARGET: VTYPE_INT,

  LDP_DELAY_TARGET: VTYPE_INT,

  LDP_MAX_RATE: VTYPE_INT,

  LDP_MIN_RATE: VTYPE_INT,

  LDP_POOL: VTYPE_STRING,

  }

DISK_LD_PARAMETERS = frozenset(DISK_LD_TYPES.keys())

# Disk template parameters (can be set/changed by the user via gnt-cluster and

# gnt-group)

DRBD_RESYNC_RATE = "resync-rate"

DRBD_DATA_STRIPES = "data-stripes"

DRBD_META_STRIPES = "meta-stripes"

DRBD_DISK_BARRIERS = "disk-barriers"

DRBD_META_BARRIERS = "meta-barriers"

DRBD_DEFAULT_METAVG = "metavg"

DRBD_DISK_CUSTOM = "disk-custom"

DRBD_NET_CUSTOM = "net-custom"

DRBD_DYNAMIC_RESYNC = "dynamic-resync"

DRBD_PLAN_AHEAD = "c-plan-ahead"

DRBD_FILL_TARGET = "c-fill-target"

DRBD_DELAY_TARGET = "c-delay-target"

DRBD_MAX_RATE = "c-max-rate"

DRBD_MIN_RATE = "c-min-rate"

LV_STRIPES = "stripes"

RBD_POOL = "pool"

DISK_DT_TYPES = {

  DRBD_RESYNC_RATE: VTYPE_INT,

  DRBD_DATA_STRIPES: VTYPE_INT,

  DRBD_META_STRIPES: VTYPE_INT,

  DRBD_DISK_BARRIERS: VTYPE_STRING,

  DRBD_META_BARRIERS: VTYPE_BOOL,

  DRBD_DEFAULT_METAVG: VTYPE_STRING,

  DRBD_DISK_CUSTOM: VTYPE_STRING,

  DRBD_NET_CUSTOM: VTYPE_STRING,

  DRBD_DYNAMIC_RESYNC: VTYPE_BOOL,

  DRBD_PLAN_AHEAD: VTYPE_INT,

  DRBD_FILL_TARGET: VTYPE_INT,

  DRBD_DELAY_TARGET: VTYPE_INT,

  DRBD_MAX_RATE: VTYPE_INT,

  DRBD_MIN_RATE: VTYPE_INT,

  LV_STRIPES: VTYPE_INT,

  RBD_POOL: VTYPE_STRING,

  }

DISK_DT_PARAMETERS = frozenset(DISK_DT_TYPES.keys())

# OOB supported commands

OOB_POWER_ON = "power-on"

OOB_POWER_OFF = "power-off"

OOB_POWER_CYCLE = "power-cycle"

OOB_POWER_STATUS = "power-status"

OOB_HEALTH = "health"

OOB_COMMANDS = frozenset([

  OOB_POWER_ON,

  OOB_POWER_OFF,

  OOB_POWER_CYCLE,

  OOB_POWER_STATUS,

  OOB_HEALTH

  ])

OOB_POWER_STATUS_POWERED = "powered"

OOB_TIMEOUT = 60 # 60 seconds

OOB_POWER_DELAY = 2.0 # 2 seconds

OOB_STATUS_OK = "OK"

OOB_STATUS_WARNING = "WARNING"

OOB_STATUS_CRITICAL = "CRITICAL"

OOB_STATUS_UNKNOWN = "UNKNOWN"

OOB_STATUSES = frozenset([

  OOB_STATUS_OK,

  OOB_STATUS_WARNING,

  OOB_STATUS_CRITICAL,

  OOB_STATUS_UNKNOWN,

  ])

# Instance Parameters Profile

PP_DEFAULT = "default"

# NIC_* constants are used inside the ganeti config

NIC_MODE = "mode"

NIC_LINK = "link"

NIC_MODE_BRIDGED = "bridged"

NIC_MODE_ROUTED = "routed"

NIC_VALID_MODES = frozenset([NIC_MODE_BRIDGED, NIC_MODE_ROUTED])

NICS_PARAMETER_TYPES = {

  NIC_MODE: VTYPE_STRING,

  NIC_LINK: VTYPE_STRING,

  }

NICS_PARAMETERS = frozenset(NICS_PARAMETER_TYPES.keys())

# IDISK_* constants are used in opcodes, to create/change disks

IDISK_SIZE = "size"

IDISK_MODE = "mode"

IDISK_ADOPT = "adopt"

IDISK_VG = "vg"

IDISK_METAVG = "metavg"

IDISK_PARAMS_TYPES = {

  IDISK_SIZE: VTYPE_SIZE,

  IDISK_MODE: VTYPE_STRING,

  IDISK_ADOPT: VTYPE_STRING,

  IDISK_VG: VTYPE_STRING,

  IDISK_METAVG: VTYPE_STRING,

  }

IDISK_PARAMS = frozenset(IDISK_PARAMS_TYPES.keys())

# INIC_* constants are used in opcodes, to create/change nics

INIC_MAC = "mac"

INIC_IP = "ip"

INIC_MODE = "mode"

INIC_LINK = "link"

INIC_PARAMS_TYPES = {

  INIC_IP: VTYPE_MAYBE_STRING,

  INIC_LINK: VTYPE_STRING,

  INIC_MAC: VTYPE_STRING,

  INIC_MODE: VTYPE_STRING,

  }

INIC_PARAMS = frozenset(INIC_PARAMS_TYPES.keys())

# Hypervisor constants

HT_XEN_PVM = "xen-pvm"

HT_FAKE = "fake"

HT_XEN_HVM = "xen-hvm"

HT_KVM = "kvm"

HT_CHROOT = "chroot"

HT_LXC = "lxc"

HYPER_TYPES = frozenset([

  HT_XEN_PVM,

  HT_FAKE,

  HT_XEN_HVM,

  HT_KVM,

  HT_CHROOT,

  HT_LXC,

  ])

HTS_REQ_PORT = frozenset([HT_XEN_HVM, HT_KVM])

VNC_BASE_PORT = 5900

VNC_PASSWORD_FILE = CONF_DIR + "/vnc-cluster-password"

VNC_DEFAULT_BIND_ADDRESS = IP4_ADDRESS_ANY

# NIC types

HT_NIC_RTL8139 = "rtl8139"

HT_NIC_NE2K_PCI = "ne2k_pci"

HT_NIC_NE2K_ISA = "ne2k_isa"

HT_NIC_I82551 = "i82551"

HT_NIC_I85557B = "i82557b"

HT_NIC_I8259ER = "i82559er"

HT_NIC_PCNET = "pcnet"

HT_NIC_E1000 = "e1000"

HT_NIC_PARAVIRTUAL = HT_DISK_PARAVIRTUAL = "paravirtual"

HT_HVM_VALID_NIC_TYPES = frozenset([

  HT_NIC_RTL8139,

  HT_NIC_NE2K_PCI,

  HT_NIC_E1000,

  HT_NIC_NE2K_ISA,

  HT_NIC_PARAVIRTUAL

  ])

HT_KVM_VALID_NIC_TYPES = frozenset([

  HT_NIC_RTL8139,

  HT_NIC_NE2K_PCI,

  HT_NIC_NE2K_ISA,

  HT_NIC_I82551,

  HT_NIC_I85557B,

  HT_NIC_I8259ER,

  HT_NIC_PCNET,

  HT_NIC_E1000,

  HT_NIC_PARAVIRTUAL

  ])

# Disk types

HT_DISK_IOEMU = "ioemu"

HT_DISK_IDE = "ide"

HT_DISK_SCSI = "scsi"

HT_DISK_SD = "sd"

HT_DISK_MTD = "mtd"

HT_DISK_PFLASH = "pflash"

HT_CACHE_DEFAULT = "default"

HT_CACHE_NONE = "none"

HT_CACHE_WTHROUGH = "writethrough"