Helper methods that check for hotplug support
[ganeti-local] / lib / constants.py
index c97fa37..5cd492e 100644 (file)
@@ -51,10 +51,8 @@ CONFIG_MINOR = _constants.CONFIG_MINOR
 CONFIG_REVISION = _constants.CONFIG_REVISION
 CONFIG_VERSION = _constants.CONFIG_VERSION
 
-#: RPC protocol version
 PROTOCOL_VERSION = _constants.PROTOCOL_VERSION
 
-# user separation
 DAEMONS_GROUP = _constants.DAEMONS_GROUP
 ADMIN_GROUP = _constants.ADMIN_GROUP
 MASTERD_USER = _constants.MASTERD_USER
@@ -94,7 +92,6 @@ ENABLE_MOND = _constants.ENABLE_MOND
 ENABLE_SPLIT_QUERY = _constants.ENABLE_SPLIT_QUERY
 ENABLE_RESTRICTED_COMMANDS = _constants.ENABLE_RESTRICTED_COMMANDS
 
-# SSH constants
 SSH = _constants.SSH
 SCP = _constants.SCP
 
@@ -159,7 +156,7 @@ LUXI_VERSION = _constants.LUXI_VERSION
 LUXI_OVERRIDE = _constants.LUXI_OVERRIDE
 LUXI_OVERRIDE_MASTER = _constants.LUXI_OVERRIDE_MASTER
 LUXI_OVERRIDE_QUERY = _constants.LUXI_OVERRIDE_QUERY
-# one of "no", "yes", "only"
+
 SYSLOG_USAGE = _constants.SYSLOG_USAGE
 SYSLOG_NO = _constants.SYSLOG_NO
 SYSLOG_YES = _constants.SYSLOG_YES
@@ -254,7 +251,6 @@ HKR_SKIP = _constants.HKR_SKIP
 HKR_FAIL = _constants.HKR_FAIL
 HKR_SUCCESS = _constants.HKR_SUCCESS
 
-# Storage types
 ST_BLOCK = _constants.ST_BLOCK
 ST_DISKLESS = _constants.ST_DISKLESS
 ST_EXT = _constants.ST_EXT
@@ -294,7 +290,6 @@ LDS_UNKNOWN = _constants.LDS_UNKNOWN
 LDS_FAULTY = _constants.LDS_FAULTY
 LDS_NAMES = _constants.LDS_NAMES
 
-# disk template types
 DT_BLOCK = _constants.DT_BLOCK
 DT_DISKLESS = _constants.DT_DISKLESS
 DT_DRBD8 = _constants.DT_DRBD8
@@ -322,6 +317,8 @@ DTS_EXCL_STORAGE = _constants.DTS_EXCL_STORAGE
 DTS_NO_FREE_SPACE_CHECK = _constants.DTS_NO_FREE_SPACE_CHECK
 DTS_BLOCK = _constants.DTS_BLOCK
 
+DTS_DRBD = _constants.DTS_DRBD
+
 DRBD_HMAC_ALG = _constants.DRBD_HMAC_ALG
 DRBD_DEFAULT_NET_PROTOCOL = _constants.DRBD_DEFAULT_NET_PROTOCOL
 DRBD_MIGRATION_NET_PROTOCOL = _constants.DRBD_MIGRATION_NET_PROTOCOL
@@ -333,6 +330,9 @@ DRBD_B_DISK_BARRIERS = _constants.DRBD_B_DISK_BARRIERS
 DRBD_B_DISK_DRAIN = _constants.DRBD_B_DISK_DRAIN
 DRBD_B_DISK_FLUSH = _constants.DRBD_B_DISK_FLUSH
 
+# the set of lvm-based disk templates
+DTS_LVM = DISK_TEMPLATES - DTS_NOT_LVM
+
 # Valid barrier combinations: "n" or any non-null subset of "bfd"
 DRBD_VALID_BARRIER_OPT = compat.UniqueFrozenset([
   frozenset([DRBD_B_NONE]),
@@ -351,9 +351,6 @@ FD_BLKTAP = _constants.FD_BLKTAP
 FD_LOOP = _constants.FD_LOOP
 FILE_DRIVER = _constants.FILE_DRIVER
 
-LDS_DRBD = _constants.LDS_DRBD
-
-# disk access mode
 DISK_RDONLY = _constants.DISK_RDONLY
 DISK_RDWR = _constants.DISK_RDWR
 DISK_ACCESS_SET = _constants.DISK_ACCESS_SET
@@ -367,12 +364,10 @@ REPLACE_DISK_CHG = _constants.REPLACE_DISK_CHG
 REPLACE_DISK_AUTO = _constants.REPLACE_DISK_AUTO
 REPLACE_MODES = _constants.REPLACE_MODES
 
-# Instance export mode
 EXPORT_MODE_LOCAL = _constants.EXPORT_MODE_LOCAL
 EXPORT_MODE_REMOTE = _constants.EXPORT_MODE_REMOTE
 EXPORT_MODES = _constants.EXPORT_MODES
 
-# instance creation modes
 INSTANCE_CREATE = _constants.INSTANCE_CREATE
 INSTANCE_IMPORT = _constants.INSTANCE_IMPORT
 INSTANCE_REMOTE_IMPORT = _constants.INSTANCE_REMOTE_IMPORT
@@ -392,13 +387,11 @@ INISECT_HYP = _constants.INISECT_HYP
 INISECT_BEP = _constants.INISECT_BEP
 INISECT_OSP = _constants.INISECT_OSP
 
-# dynamic device modification
 DDM_ADD = _constants.DDM_ADD
 DDM_MODIFY = _constants.DDM_MODIFY
 DDM_REMOVE = _constants.DDM_REMOVE
 DDMS_VALUES = _constants.DDMS_VALUES
 DDMS_VALUES_WITH_MODIFY = _constants.DDMS_VALUES_WITH_MODIFY
-# TODO: DDM_SWAP, DDM_MOVE?
 
 # common exit codes
 EXIT_SUCCESS = _constants.EXIT_SUCCESS
@@ -409,7 +402,6 @@ EXIT_NODESETUP_ERROR = _constants.EXIT_NODESETUP_ERROR
 EXIT_CONFIRMATION = _constants.EXIT_CONFIRMATION
 EXIT_UNKNOWN_FIELD = _constants.EXIT_UNKNOWN_FIELD
 
-# tags
 TAG_CLUSTER = _constants.TAG_CLUSTER
 TAG_NODEGROUP = _constants.TAG_NODEGROUP
 TAG_NODE = _constants.TAG_NODE
@@ -496,7 +488,6 @@ ES_SCRIPTS = _constants.ES_SCRIPTS
 
 ES_PARAMETERS_FILE = _constants.ES_PARAMETERS_FILE
 
-# reboot types
 INSTANCE_REBOOT_SOFT = _constants.INSTANCE_REBOOT_SOFT
 INSTANCE_REBOOT_HARD = _constants.INSTANCE_REBOOT_HARD
 INSTANCE_REBOOT_FULL = _constants.INSTANCE_REBOOT_FULL
@@ -786,7 +777,6 @@ DDP_PORT = _constants.DDP_PORT
 DDP_LOCAL_MINOR = _constants.DDP_LOCAL_MINOR
 DDP_REMOTE_MINOR = _constants.DDP_REMOTE_MINOR
 
-# OOB supported commands
 OOB_POWER_ON = _constants.OOB_POWER_ON
 OOB_POWER_OFF = _constants.OOB_POWER_OFF
 OOB_POWER_CYCLE = _constants.OOB_POWER_CYCLE
@@ -805,13 +795,13 @@ OOB_STATUS_CRITICAL = _constants.OOB_STATUS_CRITICAL
 OOB_STATUS_UNKNOWN = _constants.OOB_STATUS_UNKNOWN
 OOB_STATUSES = _constants.OOB_STATUSES
 
-# Instance Parameters Profile
-PP_DEFAULT = "default"
+PP_DEFAULT = _constants.PP_DEFAULT
 
-# NIC_* constants are used inside the ganeti config
 NIC_MODE = _constants.NIC_MODE
 NIC_LINK = _constants.NIC_LINK
 NIC_VLAN = _constants.NIC_VLAN
+NICS_PARAMETER_TYPES = _constants.NICS_PARAMETER_TYPES
+NICS_PARAMETERS = _constants.NICS_PARAMETERS
 
 NIC_MODE_BRIDGED = _constants.NIC_MODE_BRIDGED
 NIC_MODE_ROUTED = _constants.NIC_MODE_ROUTED
@@ -819,60 +809,31 @@ NIC_MODE_OVS = _constants.NIC_MODE_OVS
 NIC_IP_POOL = _constants.NIC_IP_POOL
 NIC_VALID_MODES = _constants.NIC_VALID_MODES
 
-RESERVE_ACTION = "reserve"
-RELEASE_ACTION = "release"
-
-NICS_PARAMETER_TYPES = {
-  NIC_MODE: VTYPE_STRING,
-  NIC_LINK: VTYPE_STRING,
-  NIC_VLAN: VTYPE_MAYBE_STRING,
-  }
+RESERVE_ACTION = _constants.RESERVE_ACTION
+RELEASE_ACTION = _constants.RELEASE_ACTION
+
+IDISK_SIZE = _constants.IDISK_SIZE
+IDISK_SPINDLES = _constants.IDISK_SPINDLES
+IDISK_MODE = _constants.IDISK_MODE
+IDISK_ADOPT = _constants.IDISK_ADOPT
+IDISK_VG = _constants.IDISK_VG
+IDISK_METAVG = _constants.IDISK_METAVG
+IDISK_PROVIDER = _constants.IDISK_PROVIDER
+IDISK_NAME = _constants.IDISK_NAME
+IDISK_PARAMS_TYPES = _constants.IDISK_PARAMS_TYPES
+IDISK_PARAMS = _constants.IDISK_PARAMS
+
+INIC_MAC = _constants.INIC_MAC
+INIC_IP = _constants.INIC_IP
+INIC_MODE = _constants.INIC_MODE
+INIC_LINK = _constants.INIC_LINK
+INIC_NETWORK = _constants.INIC_NETWORK
+INIC_NAME = _constants.INIC_NAME
+INIC_VLAN = _constants.INIC_VLAN
+INIC_BRIDGE = _constants.INIC_BRIDGE
+INIC_PARAMS_TYPES = _constants.INIC_PARAMS_TYPES
+INIC_PARAMS = _constants.INIC_PARAMS
 
-NICS_PARAMETERS = frozenset(NICS_PARAMETER_TYPES.keys())
-
-# IDISK_* constants are used in opcodes, to create/change disks
-IDISK_SIZE = "size"
-IDISK_SPINDLES = "spindles"
-IDISK_MODE = "mode"
-IDISK_ADOPT = "adopt"
-IDISK_VG = "vg"
-IDISK_METAVG = "metavg"
-IDISK_PROVIDER = "provider"
-IDISK_NAME = "name"
-IDISK_PARAMS_TYPES = {
-  IDISK_SIZE: VTYPE_SIZE,
-  IDISK_SPINDLES: VTYPE_INT,
-  IDISK_MODE: VTYPE_STRING,
-  IDISK_ADOPT: VTYPE_STRING,
-  IDISK_VG: VTYPE_STRING,
-  IDISK_METAVG: VTYPE_STRING,
-  IDISK_PROVIDER: VTYPE_STRING,
-  IDISK_NAME: VTYPE_MAYBE_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_NETWORK = "network"
-INIC_NAME = "name"
-INIC_VLAN = "vlan"
-INIC_BRIDGE = "bridge"
-INIC_PARAMS_TYPES = {
-  INIC_IP: VTYPE_MAYBE_STRING,
-  INIC_LINK: VTYPE_STRING,
-  INIC_MAC: VTYPE_STRING,
-  INIC_MODE: VTYPE_STRING,
-  INIC_NETWORK: VTYPE_MAYBE_STRING,
-  INIC_NAME: VTYPE_MAYBE_STRING,
-  INIC_VLAN: VTYPE_MAYBE_STRING,
-  INIC_BRIDGE: VTYPE_MAYBE_STRING
-  }
-INIC_PARAMS = frozenset(INIC_PARAMS_TYPES.keys())
-
-# Hypervisor constants
 HT_XEN_PVM = _constants.HT_XEN_PVM
 HT_FAKE = _constants.HT_FAKE
 HT_XEN_HVM = _constants.HT_XEN_HVM
@@ -882,174 +843,105 @@ HT_LXC = _constants.HT_LXC
 HYPER_TYPES = _constants.HYPER_TYPES
 HTS_REQ_PORT = _constants.HTS_REQ_PORT
 
-VNC_BASE_PORT = 5900
-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 = compat.UniqueFrozenset([
-  HT_NIC_RTL8139,
-  HT_NIC_NE2K_PCI,
-  HT_NIC_E1000,
-  HT_NIC_NE2K_ISA,
-  HT_NIC_PARAVIRTUAL,
-  ])
-HT_KVM_VALID_NIC_TYPES = compat.UniqueFrozenset([
-  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,
-  ])
-
-# Vif types
-# default vif type in xen-hvm
-HT_HVM_VIF_IOEMU = "ioemu"
-HT_HVM_VIF_VIF = "vif"
-HT_HVM_VALID_VIF_TYPES = compat.UniqueFrozenset([
-  HT_HVM_VIF_IOEMU,
-  HT_HVM_VIF_VIF,
-  ])
-
-# 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"
-HT_CACHE_WBACK = "writeback"
-HT_VALID_CACHE_TYPES = compat.UniqueFrozenset([
-  HT_CACHE_DEFAULT,
-  HT_CACHE_NONE,
-  HT_CACHE_WTHROUGH,
-  HT_CACHE_WBACK,
-  ])
-
-HT_HVM_VALID_DISK_TYPES = compat.UniqueFrozenset([
-  HT_DISK_PARAVIRTUAL,
-  HT_DISK_IOEMU,
-  ])
-HT_KVM_VALID_DISK_TYPES = compat.UniqueFrozenset([
-  HT_DISK_PARAVIRTUAL,
-  HT_DISK_IDE,
-  HT_DISK_SCSI,
-  HT_DISK_SD,
-  HT_DISK_MTD,
-  HT_DISK_PFLASH,
-  ])
-
-# Mouse types:
-HT_MOUSE_MOUSE = "mouse"
-HT_MOUSE_TABLET = "tablet"
+VNC_BASE_PORT = _constants.VNC_BASE_PORT
+VNC_DEFAULT_BIND_ADDRESS = _constants.VNC_DEFAULT_BIND_ADDRESS
+
+HT_NIC_RTL8139 = _constants.HT_NIC_RTL8139
+HT_NIC_NE2K_PCI = _constants.HT_NIC_NE2K_PCI
+HT_NIC_NE2K_ISA = _constants.HT_NIC_NE2K_ISA
+HT_NIC_I82551 = _constants.HT_NIC_I82551
+HT_NIC_I85557B = _constants.HT_NIC_I85557B
+HT_NIC_I8259ER = _constants.HT_NIC_I8259ER
+HT_NIC_PCNET = _constants.HT_NIC_PCNET
+HT_NIC_E1000 = _constants.HT_NIC_E1000
+HT_NIC_PARAVIRTUAL = _constants.HT_NIC_PARAVIRTUAL
+HT_HVM_VALID_NIC_TYPES = _constants.HT_HVM_VALID_NIC_TYPES
+HT_KVM_VALID_NIC_TYPES = _constants.HT_KVM_VALID_NIC_TYPES
+
+HT_HVM_VIF_IOEMU = _constants.HT_HVM_VIF_IOEMU
+HT_HVM_VIF_VIF = _constants.HT_HVM_VIF_VIF
+HT_HVM_VALID_VIF_TYPES = _constants.HT_HVM_VALID_VIF_TYPES
+
+HT_DISK_IOEMU = _constants.HT_DISK_IOEMU
+HT_DISK_IDE = _constants.HT_DISK_IDE
+HT_DISK_SCSI = _constants.HT_DISK_SCSI
+HT_DISK_SD = _constants.HT_DISK_SD
+HT_DISK_MTD = _constants.HT_DISK_MTD
+HT_DISK_PFLASH = _constants.HT_DISK_PFLASH
+HT_DISK_PARAVIRTUAL = _constants.HT_DISK_PARAVIRTUAL
+HT_HVM_VALID_DISK_TYPES = _constants.HT_HVM_VALID_DISK_TYPES
+HT_KVM_VALID_DISK_TYPES = _constants.HT_KVM_VALID_DISK_TYPES
+
+HT_CACHE_DEFAULT = _constants.HT_CACHE_DEFAULT
+HT_CACHE_NONE = _constants.HT_CACHE_NONE
+HT_CACHE_WTHROUGH = _constants.HT_CACHE_WTHROUGH
+HT_CACHE_WBACK = _constants.HT_CACHE_WBACK
+HT_VALID_CACHE_TYPES = _constants.HT_VALID_CACHE_TYPES
+
+HT_MOUSE_MOUSE = _constants.HT_MOUSE_MOUSE
+HT_MOUSE_TABLET = _constants.HT_MOUSE_TABLET
+HT_KVM_VALID_MOUSE_TYPES = _constants.HT_KVM_VALID_MOUSE_TYPES
+
+HT_BO_FLOPPY = _constants.HT_BO_FLOPPY
+HT_BO_CDROM = _constants.HT_BO_CDROM
+HT_BO_DISK = _constants.HT_BO_DISK
+HT_BO_NETWORK = _constants.HT_BO_NETWORK
+HT_KVM_VALID_BO_TYPES = _constants.HT_KVM_VALID_BO_TYPES
+
+HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_GLZ = \
+  _constants.HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_GLZ
+HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_LZ = \
+  _constants.HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_LZ
+HT_KVM_SPICE_LOSSLESS_IMG_COMPR_QUIC = \
+  _constants.HT_KVM_SPICE_LOSSLESS_IMG_COMPR_QUIC
+HT_KVM_SPICE_LOSSLESS_IMG_COMPR_GLZ = \
+  _constants.HT_KVM_SPICE_LOSSLESS_IMG_COMPR_GLZ
+HT_KVM_SPICE_LOSSLESS_IMG_COMPR_LZ = \
+  _constants.HT_KVM_SPICE_LOSSLESS_IMG_COMPR_LZ
+HT_KVM_SPICE_LOSSLESS_IMG_COMPR_OFF = \
+  _constants.HT_KVM_SPICE_LOSSLESS_IMG_COMPR_OFF
+HT_KVM_SPICE_VALID_LOSSLESS_IMG_COMPR_OPTIONS = \
+  _constants.HT_KVM_SPICE_VALID_LOSSLESS_IMG_COMPR_OPTIONS
+
+HT_KVM_SPICE_LOSSY_IMG_COMPR_AUTO = _constants.HT_KVM_SPICE_LOSSY_IMG_COMPR_AUTO
+HT_KVM_SPICE_LOSSY_IMG_COMPR_NEVER = \
+  _constants.HT_KVM_SPICE_LOSSY_IMG_COMPR_NEVER
+HT_KVM_SPICE_LOSSY_IMG_COMPR_ALWAYS = \
+  _constants.HT_KVM_SPICE_LOSSY_IMG_COMPR_ALWAYS
+
+HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS = \
+  _constants.HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS
+
+HT_KVM_SPICE_VIDEO_STREAM_DETECTION_OFF = \
+  _constants.HT_KVM_SPICE_VIDEO_STREAM_DETECTION_OFF
+HT_KVM_SPICE_VIDEO_STREAM_DETECTION_ALL = \
+  _constants.HT_KVM_SPICE_VIDEO_STREAM_DETECTION_ALL
+HT_KVM_SPICE_VIDEO_STREAM_DETECTION_FILTER = \
+  _constants.HT_KVM_SPICE_VIDEO_STREAM_DETECTION_FILTER
+HT_KVM_SPICE_VALID_VIDEO_STREAM_DETECTION_OPTIONS = \
+  _constants.HT_KVM_SPICE_VALID_VIDEO_STREAM_DETECTION_OPTIONS
+
+HT_SM_NONE = _constants.HT_SM_NONE
+HT_SM_USER = _constants.HT_SM_USER
+HT_SM_POOL = _constants.HT_SM_POOL
+HT_KVM_VALID_SM_TYPES = _constants.HT_KVM_VALID_SM_TYPES
+
+HT_KVM_ENABLED = _constants.HT_KVM_ENABLED
+HT_KVM_DISABLED = _constants.HT_KVM_DISABLED
+HT_KVM_FLAG_VALUES = _constants.HT_KVM_FLAG_VALUES
 
-HT_KVM_VALID_MOUSE_TYPES = compat.UniqueFrozenset([
-  HT_MOUSE_MOUSE,
-  HT_MOUSE_TABLET,
-  ])
-
-# Boot order
-HT_BO_FLOPPY = "floppy"
-HT_BO_CDROM = "cdrom"
-HT_BO_DISK = "disk"
-HT_BO_NETWORK = "network"
-
-HT_KVM_VALID_BO_TYPES = compat.UniqueFrozenset([
-  HT_BO_FLOPPY,
-  HT_BO_CDROM,
-  HT_BO_DISK,
-  HT_BO_NETWORK,
-  ])
-
-# SPICE lossless image compression options
-HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_GLZ = "auto_glz"
-HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_LZ = "auto_lz"
-HT_KVM_SPICE_LOSSLESS_IMG_COMPR_QUIC = "quic"
-HT_KVM_SPICE_LOSSLESS_IMG_COMPR_GLZ = "glz"
-HT_KVM_SPICE_LOSSLESS_IMG_COMPR_LZ = "lz"
-HT_KVM_SPICE_LOSSLESS_IMG_COMPR_OFF = "off"
-
-HT_KVM_SPICE_VALID_LOSSLESS_IMG_COMPR_OPTIONS = compat.UniqueFrozenset([
-  HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_GLZ,
-  HT_KVM_SPICE_LOSSLESS_IMG_COMPR_AUTO_LZ,
-  HT_KVM_SPICE_LOSSLESS_IMG_COMPR_QUIC,
-  HT_KVM_SPICE_LOSSLESS_IMG_COMPR_GLZ,
-  HT_KVM_SPICE_LOSSLESS_IMG_COMPR_LZ,
-  HT_KVM_SPICE_LOSSLESS_IMG_COMPR_OFF,
-  ])
-
-# SPICE lossy image compression options (valid for both jpeg and zlib-glz)
-HT_KVM_SPICE_LOSSY_IMG_COMPR_AUTO = "auto"
-HT_KVM_SPICE_LOSSY_IMG_COMPR_NEVER = "never"
-HT_KVM_SPICE_LOSSY_IMG_COMPR_ALWAYS = "always"
-
-HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS = compat.UniqueFrozenset([
-  HT_KVM_SPICE_LOSSY_IMG_COMPR_AUTO,
-  HT_KVM_SPICE_LOSSY_IMG_COMPR_NEVER,
-  HT_KVM_SPICE_LOSSY_IMG_COMPR_ALWAYS,
-  ])
-
-# SPICE video stream detection
-HT_KVM_SPICE_VIDEO_STREAM_DETECTION_OFF = "off"
-HT_KVM_SPICE_VIDEO_STREAM_DETECTION_ALL = "all"
-HT_KVM_SPICE_VIDEO_STREAM_DETECTION_FILTER = "filter"
-
-HT_KVM_SPICE_VALID_VIDEO_STREAM_DETECTION_OPTIONS = compat.UniqueFrozenset([
-  HT_KVM_SPICE_VIDEO_STREAM_DETECTION_OFF,
-  HT_KVM_SPICE_VIDEO_STREAM_DETECTION_ALL,
-  HT_KVM_SPICE_VIDEO_STREAM_DETECTION_FILTER,
-  ])
-
-# Security models
-HT_SM_NONE = "none"
-HT_SM_USER = "user"
-HT_SM_POOL = "pool"
-
-HT_KVM_VALID_SM_TYPES = compat.UniqueFrozenset([
-  HT_SM_NONE,
-  HT_SM_USER,
-  HT_SM_POOL,
-  ])
-
-# Kvm flag values
-HT_KVM_ENABLED = "enabled"
-HT_KVM_DISABLED = "disabled"
-
-HT_KVM_FLAG_VALUES = compat.UniqueFrozenset([HT_KVM_ENABLED, HT_KVM_DISABLED])
-
-# Migration type
 HT_MIGRATION_LIVE = _constants.HT_MIGRATION_LIVE
 HT_MIGRATION_NONLIVE = _constants.HT_MIGRATION_NONLIVE
 HT_MIGRATION_MODES = _constants.HT_MIGRATION_MODES
 
-# Cluster Verify steps
 VERIFY_NPLUSONE_MEM = _constants.VERIFY_NPLUSONE_MEM
 VERIFY_OPTIONAL_CHECKS = _constants.VERIFY_OPTIONAL_CHECKS
 
-# Cluster Verify error classes
 CV_TCLUSTER = _constants.CV_TCLUSTER
 CV_TGROUP = _constants.CV_TGROUP
 CV_TNODE = _constants.CV_TNODE
 CV_TINSTANCE = _constants.CV_TINSTANCE
 
-# Cluster Verify error codes and documentation
 CV_ECLUSTERCFG = _constants.CV_ECLUSTERCFG
 CV_ECLUSTERCERT = _constants.CV_ECLUSTERCERT
 CV_ECLUSTERFILECHECK = _constants.CV_ECLUSTERFILECHECK
@@ -1093,35 +985,33 @@ CV_ENODESHAREDFILESTORAGEPATHUNUSABLE = \
 CV_ALL_ECODES = _constants.CV_ALL_ECODES
 CV_ALL_ECODES_STRINGS = _constants.CV_ALL_ECODES_STRINGS
 
-# Node verify constants
-NV_BRIDGES = "bridges"
-NV_DRBDHELPER = "drbd-helper"
-NV_DRBDVERSION = "drbd-version"
-NV_DRBDLIST = "drbd-list"
-NV_EXCLUSIVEPVS = "exclusive-pvs"
-NV_FILELIST = "filelist"
-NV_ACCEPTED_STORAGE_PATHS = "allowed-file-storage-paths"
-NV_FILE_STORAGE_PATH = "file-storage-path"
-NV_SHARED_FILE_STORAGE_PATH = "shared-file-storage-path"
-NV_HVINFO = "hvinfo"
-NV_HVPARAMS = "hvparms"
-NV_HYPERVISOR = "hypervisor"
-NV_INSTANCELIST = "instancelist"
-NV_LVLIST = "lvlist"
-NV_MASTERIP = "master-ip"
-NV_NODELIST = "nodelist"
-NV_NODENETTEST = "node-net-test"
-NV_NODESETUP = "nodesetup"
-NV_OOB_PATHS = "oob-paths"
-NV_OSLIST = "oslist"
-NV_PVLIST = "pvlist"
-NV_TIME = "time"
-NV_USERSCRIPTS = "user-scripts"
-NV_VERSION = "version"
-NV_VGLIST = "vglist"
-NV_VMNODES = "vmnodes"
-
-# Instance status
+NV_BRIDGES = _constants.NV_BRIDGES
+NV_DRBDHELPER = _constants.NV_DRBDHELPER
+NV_DRBDVERSION = _constants.NV_DRBDVERSION
+NV_DRBDLIST = _constants.NV_DRBDLIST
+NV_EXCLUSIVEPVS = _constants.NV_EXCLUSIVEPVS
+NV_FILELIST = _constants.NV_FILELIST
+NV_ACCEPTED_STORAGE_PATHS = _constants.NV_ACCEPTED_STORAGE_PATHS
+NV_FILE_STORAGE_PATH = _constants.NV_FILE_STORAGE_PATH
+NV_SHARED_FILE_STORAGE_PATH = _constants.NV_SHARED_FILE_STORAGE_PATH
+NV_HVINFO = _constants.NV_HVINFO
+NV_HVPARAMS = _constants.NV_HVPARAMS
+NV_HYPERVISOR = _constants.NV_HYPERVISOR
+NV_INSTANCELIST = _constants.NV_INSTANCELIST
+NV_LVLIST = _constants.NV_LVLIST
+NV_MASTERIP = _constants.NV_MASTERIP
+NV_NODELIST = _constants.NV_NODELIST
+NV_NODENETTEST = _constants.NV_NODENETTEST
+NV_NODESETUP = _constants.NV_NODESETUP
+NV_OOB_PATHS = _constants.NV_OOB_PATHS
+NV_OSLIST = _constants.NV_OSLIST
+NV_PVLIST = _constants.NV_PVLIST
+NV_TIME = _constants.NV_TIME
+NV_USERSCRIPTS = _constants.NV_USERSCRIPTS
+NV_VERSION = _constants.NV_VERSION
+NV_VGLIST = _constants.NV_VGLIST
+NV_VMNODES = _constants.NV_VMNODES
+
 INSTST_RUNNING = _constants.INSTST_RUNNING
 INSTST_ADMINDOWN = _constants.INSTST_ADMINDOWN
 INSTST_ADMINOFFLINE = _constants.INSTST_ADMINOFFLINE
@@ -1132,13 +1022,11 @@ INSTST_ERRORUP = _constants.INSTST_ERRORUP
 INSTST_ERRORDOWN = _constants.INSTST_ERRORDOWN
 INSTST_ALL = _constants.INSTST_ALL
 
-# Admin states
 ADMINST_UP = _constants.ADMINST_UP
 ADMINST_DOWN = _constants.ADMINST_DOWN
 ADMINST_OFFLINE = _constants.ADMINST_OFFLINE
 ADMINST_ALL = _constants.ADMINST_ALL
 
-# Node roles
 NR_REGULAR = _constants.NR_REGULAR
 NR_MASTER = _constants.NR_MASTER
 NR_MCANDIDATE = _constants.NR_MCANDIDATE
@@ -1146,11 +1034,9 @@ NR_DRAINED = _constants.NR_DRAINED
 NR_OFFLINE = _constants.NR_OFFLINE
 NR_ALL = _constants.NR_ALL
 
-# SSL certificate check constants (in days)
-SSL_CERT_EXPIRATION_WARN = 30
-SSL_CERT_EXPIRATION_ERROR = 7
+SSL_CERT_EXPIRATION_WARN = _constants.SSL_CERT_EXPIRATION_WARN
+SSL_CERT_EXPIRATION_ERROR = _constants.SSL_CERT_EXPIRATION_ERROR
 
-# Allocator framework constants
 IALLOCATOR_VERSION = _constants.IALLOCATOR_VERSION
 IALLOCATOR_DIR_IN = _constants.IALLOCATOR_DIR_IN
 IALLOCATOR_DIR_OUT = _constants.IALLOCATOR_DIR_OUT
@@ -1166,24 +1052,20 @@ VALID_IALLOCATOR_MODES = _constants.VALID_IALLOCATOR_MODES
 IALLOCATOR_SEARCH_PATH = _constants.IALLOCATOR_SEARCH_PATH
 DEFAULT_IALLOCATOR_SHORTCUT = _constants.DEFAULT_IALLOCATOR_SHORTCUT
 
-# Node evacuation
 NODE_EVAC_PRI = _constants.NODE_EVAC_PRI
 NODE_EVAC_SEC = _constants.NODE_EVAC_SEC
 NODE_EVAC_ALL = _constants.NODE_EVAC_ALL
 NODE_EVAC_MODES = _constants.NODE_EVAC_MODES
 
-# Job queue
-JOB_QUEUE_VERSION = 1
-JOB_QUEUE_SIZE_HARD_LIMIT = 5000
-JOB_QUEUE_FILES_PERMS = 0640
+JOB_QUEUE_VERSION = _constants.JOB_QUEUE_VERSION
+JOB_QUEUE_SIZE_HARD_LIMIT = _constants.JOB_QUEUE_SIZE_HARD_LIMIT
+JOB_QUEUE_FILES_PERMS = _constants.JOB_QUEUE_FILES_PERMS
 
 JOB_ID_TEMPLATE = r"\d+"
 JOB_FILE_RE = re.compile(r"^job-(%s)$" % JOB_ID_TEMPLATE)
 
-# unchanged job return
-JOB_NOTCHANGED = "nochange"
+JOB_NOTCHANGED = _constants.JOB_NOTCHANGED
 
-# Job status
 JOB_STATUS_QUEUED = _constants.JOB_STATUS_QUEUED
 JOB_STATUS_WAITING = _constants.JOB_STATUS_WAITING
 JOB_STATUS_CANCELING = _constants.JOB_STATUS_CANCELING
@@ -1195,19 +1077,15 @@ JOBS_PENDING = _constants.JOBS_PENDING
 JOBS_FINALIZED = _constants.JOBS_FINALIZED
 JOB_STATUS_ALL = _constants.JOB_STATUS_ALL
 
-# OpCode status
-# not yet finalized
 OP_STATUS_QUEUED = _constants.OP_STATUS_QUEUED
 OP_STATUS_WAITING = _constants.OP_STATUS_WAITING
 OP_STATUS_CANCELING = _constants.OP_STATUS_CANCELING
 OP_STATUS_RUNNING = _constants.OP_STATUS_RUNNING
-# finalized
 OP_STATUS_CANCELED = _constants.OP_STATUS_CANCELED
 OP_STATUS_SUCCESS = _constants.OP_STATUS_SUCCESS
 OP_STATUS_ERROR = _constants.OP_STATUS_ERROR
 OPS_FINALIZED = _constants.OPS_FINALIZED
 
-# OpCode priority
 OP_PRIO_LOWEST = _constants.OP_PRIO_LOWEST
 OP_PRIO_HIGHEST = _constants.OP_PRIO_HIGHEST
 OP_PRIO_LOW = _constants.OP_PRIO_LOW
@@ -1216,180 +1094,100 @@ OP_PRIO_HIGH = _constants.OP_PRIO_HIGH
 OP_PRIO_SUBMIT_VALID = _constants.OP_PRIO_SUBMIT_VALID
 OP_PRIO_DEFAULT = _constants.OP_PRIO_DEFAULT
 
-# Lock recalculate mode
-LOCKS_REPLACE = "replace"
-LOCKS_APPEND = "append"
+LOCKS_REPLACE = _constants.LOCKS_REPLACE
+LOCKS_APPEND = _constants.LOCKS_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
-# TODO
-LOCK_ATTEMPTS_TIMEOUT = 10 * 3600 / (OP_PRIO_DEFAULT - OP_PRIO_HIGHEST)
-LOCK_ATTEMPTS_MAXWAIT = 15.0
-LOCK_ATTEMPTS_MINWAIT = 1.0
+LOCK_ATTEMPTS_TIMEOUT = _constants.LOCK_ATTEMPTS_TIMEOUT
+LOCK_ATTEMPTS_MAXWAIT = _constants.LOCK_ATTEMPTS_MAXWAIT
+LOCK_ATTEMPTS_MINWAIT = _constants.LOCK_ATTEMPTS_MINWAIT
 
-# Execution log types
 ELOG_MESSAGE = _constants.ELOG_MESSAGE
 ELOG_REMOTE_IMPORT = _constants.ELOG_REMOTE_IMPORT
 ELOG_JQUEUE_TEST = _constants.ELOG_JQUEUE_TEST
 
-# /etc/hosts modification
-ETC_HOSTS_ADD = "add"
-ETC_HOSTS_REMOVE = "remove"
-
-# Job queue test
-JQT_MSGPREFIX = "TESTMSG="
-JQT_EXPANDNAMES = "expandnames"
-JQT_EXEC = "exec"
-JQT_LOGMSG = "logmsg"
-JQT_STARTMSG = "startmsg"
-JQT_ALL = compat.UniqueFrozenset([
-  JQT_EXPANDNAMES,
-  JQT_EXEC,
-  JQT_LOGMSG,
-  JQT_STARTMSG,
-  ])
-
-# Query resources
-QR_CLUSTER = "cluster"
-QR_INSTANCE = "instance"
-QR_NODE = "node"
-QR_LOCK = "lock"
-QR_GROUP = "group"
-QR_OS = "os"
-QR_JOB = "job"
-QR_EXPORT = "export"
-QR_NETWORK = "network"
-QR_EXTSTORAGE = "extstorage"
-
-#: List of resources which can be queried using L{opcodes.OpQuery}
-QR_VIA_OP = compat.UniqueFrozenset([
-  QR_CLUSTER,
-  QR_INSTANCE,
-  QR_NODE,
-  QR_GROUP,
-  QR_OS,
-  QR_EXPORT,
-  QR_NETWORK,
-  QR_EXTSTORAGE,
-  ])
-
-#: List of resources which can be queried using Local UniX Interface
-QR_VIA_LUXI = QR_VIA_OP.union([
-  QR_LOCK,
-  QR_JOB,
-  ])
-
-#: List of resources which can be queried using RAPI
-QR_VIA_RAPI = QR_VIA_LUXI
-
-# Query field types
-QFT_UNKNOWN = "unknown"
-QFT_TEXT = "text"
-QFT_BOOL = "bool"
-QFT_NUMBER = "number"
-QFT_UNIT = "unit"
-QFT_TIMESTAMP = "timestamp"
-QFT_OTHER = "other"
-
-#: All query field types
-QFT_ALL = compat.UniqueFrozenset([
-  QFT_UNKNOWN,
-  QFT_TEXT,
-  QFT_BOOL,
-  QFT_NUMBER,
-  QFT_UNIT,
-  QFT_TIMESTAMP,
-  QFT_OTHER,
-  ])
-
-# Query result field status (don't change or reuse values as they're used by
-# clients)
-#: Normal field status
-RS_NORMAL = 0
-#: Unknown field
-RS_UNKNOWN = 1
-#: No data (e.g. RPC error), can be used instead of L{RS_OFFLINE}
-RS_NODATA = 2
-#: Value unavailable/unsupported for item; if this field is supported
-#: but we cannot get the data for the moment, RS_NODATA or
-#: RS_OFFLINE should be used
-RS_UNAVAIL = 3
-#: Resource marked offline
-RS_OFFLINE = 4
-
-RS_ALL = compat.UniqueFrozenset([
-  RS_NORMAL,
-  RS_UNKNOWN,
-  RS_NODATA,
-  RS_UNAVAIL,
-  RS_OFFLINE,
-  ])
-
-#: Dictionary with special field cases and their verbose/terse formatting
-RSS_DESCRIPTION = {
-  RS_UNKNOWN: ("(unknown)", "??"),
-  RS_NODATA: ("(nodata)", "?"),
-  RS_OFFLINE: ("(offline)", "*"),
-  RS_UNAVAIL: ("(unavail)", "-"),
-  }
-
-# max dynamic devices
-MAX_NICS = 8
-MAX_DISKS = 16
-
-# SSCONF file prefix
-SSCONF_FILEPREFIX = "ssconf_"
-# SSCONF keys
-SS_CLUSTER_NAME = "cluster_name"
-SS_CLUSTER_TAGS = "cluster_tags"
-SS_FILE_STORAGE_DIR = "file_storage_dir"
-SS_SHARED_FILE_STORAGE_DIR = "shared_file_storage_dir"
-SS_MASTER_CANDIDATES = "master_candidates"
-SS_MASTER_CANDIDATES_IPS = "master_candidates_ips"
-SS_MASTER_IP = "master_ip"
-SS_MASTER_NETDEV = "master_netdev"
-SS_MASTER_NETMASK = "master_netmask"
-SS_MASTER_NODE = "master_node"
-SS_NODE_LIST = "node_list"
-SS_NODE_PRIMARY_IPS = "node_primary_ips"
-SS_NODE_SECONDARY_IPS = "node_secondary_ips"
-SS_OFFLINE_NODES = "offline_nodes"
-SS_ONLINE_NODES = "online_nodes"
-SS_PRIMARY_IP_FAMILY = "primary_ip_family"
-SS_INSTANCE_LIST = "instance_list"
-SS_RELEASE_VERSION = "release_version"
-SS_HYPERVISOR_LIST = "hypervisor_list"
-SS_MAINTAIN_NODE_HEALTH = "maintain_node_health"
-SS_UID_POOL = "uid_pool"
-SS_NODEGROUPS = "nodegroups"
-SS_NETWORKS = "networks"
-
-# This is not a complete SSCONF key, but the prefix for the hypervisor keys
-SS_HVPARAMS_PREF = "hvparams_"
-
-# Hvparams keys:
-SS_HVPARAMS_XEN_PVM = SS_HVPARAMS_PREF + HT_XEN_PVM
-SS_HVPARAMS_XEN_FAKE = SS_HVPARAMS_PREF + HT_FAKE
-SS_HVPARAMS_XEN_HVM = SS_HVPARAMS_PREF + HT_XEN_HVM
-SS_HVPARAMS_XEN_KVM = SS_HVPARAMS_PREF + HT_KVM
-SS_HVPARAMS_XEN_CHROOT = SS_HVPARAMS_PREF + HT_CHROOT
-SS_HVPARAMS_XEN_LXC = SS_HVPARAMS_PREF + HT_LXC
-
-VALID_SS_HVPARAMS_KEYS = compat.UniqueFrozenset([
-  SS_HVPARAMS_XEN_PVM,
-  SS_HVPARAMS_XEN_FAKE,
-  SS_HVPARAMS_XEN_HVM,
-  SS_HVPARAMS_XEN_KVM,
-  SS_HVPARAMS_XEN_CHROOT,
-  SS_HVPARAMS_XEN_LXC,
-  ])
-
-SS_FILE_PERMS = 0444
-
-# cluster wide default parameters
-DEFAULT_ENABLED_HYPERVISOR = HT_XEN_PVM
+ETC_HOSTS_ADD = _constants.ETC_HOSTS_ADD
+ETC_HOSTS_REMOVE = _constants.ETC_HOSTS_REMOVE
+
+JQT_MSGPREFIX = _constants.JQT_MSGPREFIX
+JQT_EXPANDNAMES = _constants.JQT_EXPANDNAMES
+JQT_EXEC = _constants.JQT_EXEC
+JQT_LOGMSG = _constants.JQT_LOGMSG
+JQT_STARTMSG = _constants.JQT_STARTMSG
+JQT_ALL = _constants.JQT_ALL
+
+QR_CLUSTER = _constants.QR_CLUSTER
+QR_INSTANCE = _constants.QR_INSTANCE
+QR_NODE = _constants.QR_NODE
+QR_LOCK = _constants.QR_LOCK
+QR_GROUP = _constants.QR_GROUP
+QR_OS = _constants.QR_OS
+QR_JOB = _constants.QR_JOB
+QR_EXPORT = _constants.QR_EXPORT
+QR_NETWORK = _constants.QR_NETWORK
+QR_EXTSTORAGE = _constants.QR_EXTSTORAGE
+QR_VIA_OP = _constants.QR_VIA_OP
+QR_VIA_LUXI = _constants.QR_VIA_LUXI
+QR_VIA_RAPI = _constants.QR_VIA_RAPI
+
+QFT_UNKNOWN = _constants.QFT_UNKNOWN
+QFT_TEXT = _constants.QFT_TEXT
+QFT_BOOL = _constants.QFT_BOOL
+QFT_NUMBER = _constants.QFT_NUMBER
+QFT_UNIT = _constants.QFT_UNIT
+QFT_TIMESTAMP = _constants.QFT_TIMESTAMP
+QFT_OTHER = _constants.QFT_OTHER
+QFT_ALL = _constants.QFT_ALL
+
+RS_NORMAL = _constants.RS_NORMAL
+RS_UNKNOWN = _constants.RS_UNKNOWN
+RS_NODATA = _constants.RS_NODATA
+RS_UNAVAIL = _constants.RS_UNAVAIL
+RS_OFFLINE = _constants.RS_OFFLINE
+RS_ALL = _constants.RS_ALL
+RSS_DESCRIPTION = _constants.RSS_DESCRIPTION
+
+MAX_NICS = _constants.MAX_NICS
+MAX_DISKS = _constants.MAX_DISKS
+
+SSCONF_FILEPREFIX = _constants.SSCONF_FILEPREFIX
+
+SS_CLUSTER_NAME = _constants.SS_CLUSTER_NAME
+SS_CLUSTER_TAGS = _constants.SS_CLUSTER_TAGS
+SS_FILE_STORAGE_DIR = _constants.SS_FILE_STORAGE_DIR
+SS_SHARED_FILE_STORAGE_DIR = _constants.SS_SHARED_FILE_STORAGE_DIR
+SS_MASTER_CANDIDATES = _constants.SS_MASTER_CANDIDATES
+SS_MASTER_CANDIDATES_IPS = _constants.SS_MASTER_CANDIDATES_IPS
+SS_MASTER_IP = _constants.SS_MASTER_IP
+SS_MASTER_NETDEV = _constants.SS_MASTER_NETDEV
+SS_MASTER_NETMASK = _constants.SS_MASTER_NETMASK
+SS_MASTER_NODE = _constants.SS_MASTER_NODE
+SS_NODE_LIST = _constants.SS_NODE_LIST
+SS_NODE_PRIMARY_IPS = _constants.SS_NODE_PRIMARY_IPS
+SS_NODE_SECONDARY_IPS = _constants.SS_NODE_SECONDARY_IPS
+SS_OFFLINE_NODES = _constants.SS_OFFLINE_NODES
+SS_ONLINE_NODES = _constants.SS_ONLINE_NODES
+SS_PRIMARY_IP_FAMILY = _constants.SS_PRIMARY_IP_FAMILY
+SS_INSTANCE_LIST = _constants.SS_INSTANCE_LIST
+SS_RELEASE_VERSION = _constants.SS_RELEASE_VERSION
+SS_HYPERVISOR_LIST = _constants.SS_HYPERVISOR_LIST
+SS_MAINTAIN_NODE_HEALTH = _constants.SS_MAINTAIN_NODE_HEALTH
+SS_UID_POOL = _constants.SS_UID_POOL
+SS_NODEGROUPS = _constants.SS_NODEGROUPS
+SS_NETWORKS = _constants.SS_NETWORKS
+
+SS_HVPARAMS_PREF = _constants.SS_HVPARAMS_PREF
+
+SS_HVPARAMS_XEN_PVM = _constants.SS_HVPARAMS_XEN_PVM
+SS_HVPARAMS_XEN_FAKE = _constants.SS_HVPARAMS_XEN_FAKE
+SS_HVPARAMS_XEN_HVM = _constants.SS_HVPARAMS_XEN_HVM
+SS_HVPARAMS_XEN_KVM = _constants.SS_HVPARAMS_XEN_KVM
+SS_HVPARAMS_XEN_CHROOT = _constants.SS_HVPARAMS_XEN_CHROOT
+SS_HVPARAMS_XEN_LXC = _constants.SS_HVPARAMS_XEN_LXC
+VALID_SS_HVPARAMS_KEYS = _constants.VALID_SS_HVPARAMS_KEYS
+
+SS_FILE_PERMS = _constants.SS_FILE_PERMS
+
+DEFAULT_ENABLED_HYPERVISOR = _constants.DEFAULT_ENABLED_HYPERVISOR
 
 HVC_DEFAULTS = {
   HT_XEN_PVM: {
@@ -1509,12 +1307,7 @@ HVC_DEFAULTS = {
     },
   }
 
-HVC_GLOBALS = compat.UniqueFrozenset([
-  HV_MIGRATION_PORT,
-  HV_MIGRATION_BANDWIDTH,
-  HV_MIGRATION_MODE,
-  HV_XEN_CMD,
-  ])
+HVC_GLOBALS = _constants.HVC_GLOBALS
 
 BEC_DEFAULTS = {
   BE_MINMEM: 128,
@@ -1534,9 +1327,7 @@ NDC_DEFAULTS = {
   ND_OVS_LINK: ""
   }
 
-NDC_GLOBALS = compat.UniqueFrozenset([
-  ND_EXCLUSIVE_STORAGE,
-  ])
+NDC_GLOBALS = _constants.NDC_GLOBALS
 
 DISK_LD_DEFAULTS = {
   DT_DRBD8: {
@@ -1618,26 +1409,8 @@ NICC_DEFAULTS = {
   NIC_VLAN: VALUE_HS_NOTHING,
   }
 
-# All of the following values are quite arbitrarily - there are no
-# "good" defaults, these must be customised per-site
-ISPECS_MINMAX_DEFAULTS = {
-  ISPECS_MIN: {
-    ISPEC_MEM_SIZE: 128,
-    ISPEC_CPU_COUNT: 1,
-    ISPEC_DISK_COUNT: 1,
-    ISPEC_DISK_SIZE: 1024,
-    ISPEC_NIC_COUNT: 1,
-    ISPEC_SPINDLE_USE: 1,
-    },
-  ISPECS_MAX: {
-    ISPEC_MEM_SIZE: 32768,
-    ISPEC_CPU_COUNT: 8,
-    ISPEC_DISK_COUNT: MAX_DISKS,
-    ISPEC_DISK_SIZE: 1024 * 1024,
-    ISPEC_NIC_COUNT: MAX_NICS,
-    ISPEC_SPINDLE_USE: 12,
-    },
-  }
+ISPECS_MINMAX_DEFAULTS = _constants.ISPECS_MINMAX_DEFAULTS
+
 IPOLICY_DEFAULTS = {
   ISPECS_MINMAX: [ISPECS_MINMAX_DEFAULTS],
   ISPECS_STD: {
@@ -1653,13 +1426,10 @@ IPOLICY_DEFAULTS = {
   IPOLICY_SPINDLE_RATIO: 32.0,
   }
 
-MASTER_POOL_SIZE_DEFAULT = 10
+MASTER_POOL_SIZE_DEFAULT = _constants.MASTER_POOL_SIZE_DEFAULT
 
-# Exclusive storage:
-# Error margin used to compare physical disks
-PART_MARGIN = .01
-# Space reserved when creating instance disks
-PART_RESERVED = .02
+PART_MARGIN = _constants.PART_MARGIN
+PART_RESERVED = _constants.PART_RESERVED
 
 CONFD_PROTOCOL_VERSION = _constants.CONFD_PROTOCOL_VERSION
 
@@ -1674,9 +1444,6 @@ CONFD_REQ_NODE_DRBD = _constants.CONFD_REQ_NODE_DRBD
 CONFD_REQ_NODE_INSTANCES = _constants.CONFD_REQ_NODE_INSTANCES
 CONFD_REQS = _constants.CONFD_REQS
 
-# Confd request query fields. These are used to narrow down queries.
-# These must be strings rather than integers, because json-encoding
-# converts them to strings anyway, as they're used as dict-keys.
 CONFD_REQQ_LINK = _constants.CONFD_REQQ_LINK
 CONFD_REQQ_IP = _constants.CONFD_REQQ_IP
 CONFD_REQQ_IPLIST = _constants.CONFD_REQQ_IPLIST
@@ -1703,160 +1470,103 @@ CONFD_ERROR_UNKNOWN_ENTRY = _constants.CONFD_ERROR_UNKNOWN_ENTRY
 CONFD_ERROR_INTERNAL = _constants.CONFD_ERROR_INTERNAL
 CONFD_ERROR_ARGUMENT = _constants.CONFD_ERROR_ARGUMENT
 
-# Each request is "salted" by the current timestamp.
-# This constants decides how many seconds of skew to accept.
-# TODO: make this a default and allow the value to be more configurable
 CONFD_MAX_CLOCK_SKEW = _constants.CONFD_MAX_CLOCK_SKEW
 
-# When we haven't reloaded the config for more than this amount of
-# seconds, we force a test to see if inotify is betraying us. Using a
-# prime number to ensure we get less chance of 'same wakeup' with
-# other processes.
 CONFD_CONFIG_RELOAD_TIMEOUT = _constants.CONFD_CONFIG_RELOAD_TIMEOUT
-
-# If we receive more than one update in this amount of microseconds,
-# we move to polling every RATELIMIT seconds, rather than relying on
-# inotify, to be able to serve more requests.
 CONFD_CONFIG_RELOAD_RATELIMIT = _constants.CONFD_CONFIG_RELOAD_RATELIMIT
 
-# Magic number prepended to all confd queries.
-# This allows us to distinguish different types of confd protocols and handle
-# them. For example by changing this we can move the whole payload to be
-# compressed, or move away from json.
 CONFD_MAGIC_FOURCC = _constants.CONFD_MAGIC_FOURCC
 
-# By default a confd request is sent to the minimum between this number and all
-# MCs. 6 was chosen because even in the case of a disastrous 50% response rate,
-# we should have enough answers to be able to compare more than one.
 CONFD_DEFAULT_REQ_COVERAGE = _constants.CONFD_DEFAULT_REQ_COVERAGE
 
-# Timeout in seconds to expire pending query request in the confd client
-# library. We don't actually expect any answer more than 10 seconds after we
-# sent a request.
 CONFD_CLIENT_EXPIRE_TIMEOUT = _constants.CONFD_CLIENT_EXPIRE_TIMEOUT
 
-# Maximum UDP datagram size.
-# On IPv4: 64K - 20 (ip header size) - 8 (udp header size) = 65507
-# On IPv6: 64K - 40 (ip6 header size) - 8 (udp header size) = 65487
-#   (assuming we can't use jumbo frames)
-# We just set this to 60K, which should be enough
-MAX_UDP_DATA_SIZE = 61440
+MAX_UDP_DATA_SIZE = _constants.MAX_UDP_DATA_SIZE
 
-# User-id pool minimum/maximum acceptable user-ids.
-UIDPOOL_UID_MIN = 0
-UIDPOOL_UID_MAX = 2 ** 32 - 1 # Assuming 32 bit user-ids
+UIDPOOL_UID_MIN = _constants.UIDPOOL_UID_MIN
+UIDPOOL_UID_MAX = _constants.UIDPOOL_UID_MAX
 
-# Name or path of the pgrep command
-PGREP = "pgrep"
+PGREP = _constants.PGREP
 
-# Name of the node group that gets created at cluster init or upgrade
-INITIAL_NODE_GROUP_NAME = "default"
+INITIAL_NODE_GROUP_NAME = _constants.INITIAL_NODE_GROUP_NAME
 
-# Possible values for NodeGroup.alloc_policy
 ALLOC_POLICY_PREFERRED = _constants.ALLOC_POLICY_PREFERRED
 ALLOC_POLICY_LAST_RESORT = _constants.ALLOC_POLICY_LAST_RESORT
 ALLOC_POLICY_UNALLOCABLE = _constants.ALLOC_POLICY_UNALLOCABLE
 VALID_ALLOC_POLICIES = _constants.VALID_ALLOC_POLICIES
 
-# Temporary external/shared storage parameters
 BLOCKDEV_DRIVER_MANUAL = _constants.BLOCKDEV_DRIVER_MANUAL
 
-# qemu-img path, required for ovfconverter
 QEMUIMG_PATH = _constants.QEMUIMG_PATH
 
-# Whether htools was enabled at compilation time
 HTOOLS = _constants.HTOOLS
-# The hail iallocator
-IALLOC_HAIL = "hail"
-
-# Fake opcodes for functions that have hooks attached to them via
-# backend.RunLocalHooks
-FAKE_OP_MASTER_TURNUP = "OP_CLUSTER_IP_TURNUP"
-FAKE_OP_MASTER_TURNDOWN = "OP_CLUSTER_IP_TURNDOWN"
-
-# SSH key types
-SSHK_RSA = "rsa"
-SSHK_DSA = "dsa"
-SSHK_ALL = compat.UniqueFrozenset([SSHK_RSA, SSHK_DSA])
-
-# SSH authorized key types
-SSHAK_RSA = "ssh-rsa"
-SSHAK_DSS = "ssh-dss"
-SSHAK_ALL = compat.UniqueFrozenset([SSHAK_RSA, SSHAK_DSS])
-
-# SSH setup
-SSHS_CLUSTER_NAME = "cluster_name"
-SSHS_SSH_HOST_KEY = "ssh_host_key"
-SSHS_SSH_ROOT_KEY = "ssh_root_key"
-SSHS_NODE_DAEMON_CERTIFICATE = "node_daemon_certificate"
-
-#: Key files for SSH daemon
+IALLOC_HAIL = _constants.IALLOC_HAIL
+
+FAKE_OP_MASTER_TURNUP = _constants.FAKE_OP_MASTER_TURNUP
+FAKE_OP_MASTER_TURNDOWN = _constants.FAKE_OP_MASTER_TURNDOWN
+
+SSHK_RSA = _constants.SSHK_RSA
+SSHK_DSA = _constants.SSHK_DSA
+SSHK_ALL = _constants.SSHK_ALL
+
+SSHAK_RSA = _constants.SSHAK_RSA
+SSHAK_DSS = _constants.SSHAK_DSS
+SSHAK_ALL = _constants.SSHAK_ALL
+
+SSHS_CLUSTER_NAME = _constants.SSHS_CLUSTER_NAME
+SSHS_SSH_HOST_KEY = _constants.SSHS_SSH_HOST_KEY
+SSHS_SSH_ROOT_KEY = _constants.SSHS_SSH_ROOT_KEY
+SSHS_NODE_DAEMON_CERTIFICATE = _constants.SSHS_NODE_DAEMON_CERTIFICATE
+
 SSH_DAEMON_KEYFILES = {
   SSHK_RSA: (pathutils.SSH_HOST_RSA_PRIV, pathutils.SSH_HOST_RSA_PUB),
   SSHK_DSA: (pathutils.SSH_HOST_DSA_PRIV, pathutils.SSH_HOST_DSA_PUB),
   }
 
-# Node daemon setup
-NDS_CLUSTER_NAME = "cluster_name"
-NDS_NODE_DAEMON_CERTIFICATE = "node_daemon_certificate"
-NDS_SSCONF = "ssconf"
-NDS_START_NODE_DAEMON = "start_node_daemon"
+NDS_CLUSTER_NAME = _constants.NDS_CLUSTER_NAME
+NDS_NODE_DAEMON_CERTIFICATE = _constants.NDS_NODE_DAEMON_CERTIFICATE
+NDS_SSCONF = _constants.NDS_SSCONF
+NDS_START_NODE_DAEMON = _constants.NDS_START_NODE_DAEMON
 
-# Path generating random UUID
 RANDOM_UUID_FILE = _constants.RANDOM_UUID_FILE
 
 # Regex string for verifying a UUID
 UUID_REGEX = "^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$"
 
-# Auto-repair tag prefixes
 AUTO_REPAIR_TAG_PREFIX = _constants.AUTO_REPAIR_TAG_PREFIX
 AUTO_REPAIR_TAG_ENABLED = _constants.AUTO_REPAIR_TAG_ENABLED
 AUTO_REPAIR_TAG_SUSPENDED = _constants.AUTO_REPAIR_TAG_SUSPENDED
 AUTO_REPAIR_TAG_PENDING = _constants.AUTO_REPAIR_TAG_PENDING
 AUTO_REPAIR_TAG_RESULT = _constants.AUTO_REPAIR_TAG_RESULT
 
-# Auto-repair levels
 AUTO_REPAIR_FIX_STORAGE = _constants.AUTO_REPAIR_FIX_STORAGE
 AUTO_REPAIR_MIGRATE = _constants.AUTO_REPAIR_MIGRATE
 AUTO_REPAIR_FAILOVER = _constants.AUTO_REPAIR_FAILOVER
 AUTO_REPAIR_REINSTALL = _constants.AUTO_REPAIR_REINSTALL
 AUTO_REPAIR_ALL_TYPES = _constants.AUTO_REPAIR_ALL_TYPES
 
-# Auto-repair results
 AUTO_REPAIR_SUCCESS = _constants.AUTO_REPAIR_SUCCESS
 AUTO_REPAIR_FAILURE = _constants.AUTO_REPAIR_FAILURE
 AUTO_REPAIR_ENOPERM = _constants.AUTO_REPAIR_ENOPERM
 AUTO_REPAIR_ALL_RESULTS = _constants.AUTO_REPAIR_ALL_RESULTS
 
-# The version identifier for builtin data collectors
 BUILTIN_DATA_COLLECTOR_VERSION = _constants.BUILTIN_DATA_COLLECTOR_VERSION
 
-# The reason trail opcode parameter name
 OPCODE_REASON = _constants.OPCODE_REASON
 
-# The source reasons for the execution of an OpCode
-OPCODE_REASON_SRC_CLIENT = "gnt:client"
-OPCODE_REASON_SRC_NODED = "gnt:daemon:noded"
-OPCODE_REASON_SRC_OPCODE = "gnt:opcode"
-OPCODE_REASON_SRC_RLIB2 = "gnt:library:rlib2"
-OPCODE_REASON_SRC_USER = "gnt:user"
-
-OPCODE_REASON_SOURCES = compat.UniqueFrozenset([
-  OPCODE_REASON_SRC_CLIENT,
-  OPCODE_REASON_SRC_NODED,
-  OPCODE_REASON_SRC_OPCODE,
-  OPCODE_REASON_SRC_RLIB2,
-  OPCODE_REASON_SRC_USER,
-  ])
+OPCODE_REASON_SRC_CLIENT = _constants.OPCODE_REASON_SRC_CLIENT
+OPCODE_REASON_SRC_NODED = _constants.OPCODE_REASON_SRC_NODED
+OPCODE_REASON_SRC_OPCODE = _constants.OPCODE_REASON_SRC_OPCODE
+OPCODE_REASON_SRC_RLIB2 = _constants.OPCODE_REASON_SRC_RLIB2
+OPCODE_REASON_SRC_USER = _constants.OPCODE_REASON_SRC_USER
+OPCODE_REASON_SOURCES = _constants.OPCODE_REASON_SOURCES
 
 DISKSTATS_FILE = _constants.DISKSTATS_FILE
 
-# CPU load collector variables
 STAT_FILE = _constants.STAT_FILE
 CPUAVGLOAD_BUFFER_SIZE = _constants.CPUAVGLOAD_BUFFER_SIZE
 CPUAVGLOAD_WINDOW_SIZE = _constants.CPUAVGLOAD_WINDOW_SIZE
 
-# Mond's variable for periodical data collection
 MOND_TIME_INTERVAL = _constants.MOND_TIME_INTERVAL
 
 # MonD's latest API version
@@ -1867,6 +1577,21 @@ MOND_LATEST_API_VERSION = 1
 UPGRADE_QUEUE_DRAIN_TIMEOUT = _constants.UPGRADE_QUEUE_DRAIN_TIMEOUT
 UPGRADE_QUEUE_POLL_INTERVAL = _constants.UPGRADE_QUEUE_POLL_INTERVAL
 
+# device types to hotplug
+HOTPLUG_TARGET_DISK = _constants.HOTPLUG_TARGET_DISK
+HOTPLUG_TARGET_NIC = _constants.HOTPLUG_TARGET_NIC
+HOTPLUG_ALL_TARGETS = _constants.HOTPLUG_ALL_TARGETS
+
+# hotplug actions
+HOTPLUG_ACTION_ADD = _constants.HOTPLUG_ACTION_ADD
+HOTPLUG_ACTION_REMOVE = _constants.HOTPLUG_ACTION_REMOVE
+HOTPLUG_ACTION_MODIFY = _constants.HOTPLUG_ACTION_MODIFY
+HOTPLUG_ALL_ACTIONS = _constants.HOTPLUG_ALL_ACTIONS
+
+# other constants
+
+HAS_GNU_LN = _constants.HAS_GNU_LN
+
 # Do not re-export imported modules
 del re, _vcsversion, _constants, socket, pathutils, compat