root / lib / hypervisor / hv_kvm.py @ e687ec01
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#
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#
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# Copyright (C) 2008, 2009, 2010, 2011 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""KVM hypervisor
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"""
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import errno |
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import os |
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import os.path |
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import re |
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import tempfile |
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import time |
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import logging |
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import pwd |
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import struct |
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import fcntl |
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import shutil |
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from ganeti import utils |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import serializer |
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from ganeti import objects |
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from ganeti import uidpool |
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from ganeti import ssconf |
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from ganeti.hypervisor import hv_base |
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from ganeti import netutils |
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from ganeti.utils import wrapper as utils_wrapper |
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_KVM_NETWORK_SCRIPT = constants.SYSCONFDIR + "/ganeti/kvm-vif-bridge"
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# TUN/TAP driver constants, taken from <linux/if_tun.h>
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# They are architecture-independent and already hardcoded in qemu-kvm source,
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# so we can safely include them here.
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TUNSETIFF = 0x400454ca
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TUNGETIFF = 0x800454d2
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TUNGETFEATURES = 0x800454cf
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IFF_TAP = 0x0002
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IFF_NO_PI = 0x1000
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IFF_VNET_HDR = 0x4000
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def _ProbeTapVnetHdr(fd): |
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"""Check whether to enable the IFF_VNET_HDR flag.
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To do this, _all_ of the following conditions must be met:
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1. TUNGETFEATURES ioctl() *must* be implemented
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2. TUNGETFEATURES ioctl() result *must* contain the IFF_VNET_HDR flag
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3. TUNGETIFF ioctl() *must* be implemented; reading the kernel code in
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drivers/net/tun.c there is no way to test this until after the tap device
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has been created using TUNSETIFF, and there is no way to change the
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IFF_VNET_HDR flag after creating the interface, catch-22! However both
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TUNGETIFF and TUNGETFEATURES were introduced in kernel version 2.6.27,
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thus we can expect TUNGETIFF to be present if TUNGETFEATURES is.
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@type fd: int
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@param fd: the file descriptor of /dev/net/tun
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"""
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req = struct.pack("I", 0) |
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try:
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res = fcntl.ioctl(fd, TUNGETFEATURES, req) |
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except EnvironmentError: |
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logging.warning("TUNGETFEATURES ioctl() not implemented")
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return False |
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tunflags = struct.unpack("I", res)[0] |
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if tunflags & IFF_VNET_HDR:
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return True |
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else:
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logging.warning("Host does not support IFF_VNET_HDR, not enabling")
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return False |
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def _OpenTap(vnet_hdr=True): |
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"""Open a new tap device and return its file descriptor.
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This is intended to be used by a qemu-type hypervisor together with the -net
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tap,fd=<fd> command line parameter.
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@type vnet_hdr: boolean
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@param vnet_hdr: Enable the VNET Header
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@return: (ifname, tapfd)
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@rtype: tuple
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"""
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try:
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tapfd = os.open("/dev/net/tun", os.O_RDWR)
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except EnvironmentError: |
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raise errors.HypervisorError("Failed to open /dev/net/tun") |
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flags = IFF_TAP | IFF_NO_PI |
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if vnet_hdr and _ProbeTapVnetHdr(tapfd): |
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flags |= IFF_VNET_HDR |
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# The struct ifreq ioctl request (see netdevice(7))
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ifr = struct.pack("16sh", "", flags) |
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try:
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res = fcntl.ioctl(tapfd, TUNSETIFF, ifr) |
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except EnvironmentError: |
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raise errors.HypervisorError("Failed to allocate a new TAP device") |
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# Get the interface name from the ioctl
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ifname = struct.unpack("16sh", res)[0].strip("\x00") |
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return (ifname, tapfd)
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class KVMHypervisor(hv_base.BaseHypervisor): |
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"""KVM hypervisor interface"""
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CAN_MIGRATE = True
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_ROOT_DIR = constants.RUN_GANETI_DIR + "/kvm-hypervisor"
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_PIDS_DIR = _ROOT_DIR + "/pid" # contains live instances pids |
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_UIDS_DIR = _ROOT_DIR + "/uid" # contains instances reserved uids |
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_CTRL_DIR = _ROOT_DIR + "/ctrl" # contains instances control sockets |
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_CONF_DIR = _ROOT_DIR + "/conf" # contains instances startup data |
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_NICS_DIR = _ROOT_DIR + "/nic" # contains instances nic <-> tap associations |
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_KEYMAP_DIR = _ROOT_DIR + "/keymap" # contains instances keymaps |
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# KVM instances with chroot enabled are started in empty chroot directories.
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_CHROOT_DIR = _ROOT_DIR + "/chroot" # for empty chroot directories |
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# After an instance is stopped, its chroot directory is removed.
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# If the chroot directory is not empty, it can't be removed.
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# A non-empty chroot directory indicates a possible security incident.
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# To support forensics, the non-empty chroot directory is quarantined in
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# a separate directory, called 'chroot-quarantine'.
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_CHROOT_QUARANTINE_DIR = _ROOT_DIR + "/chroot-quarantine"
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_DIRS = [_ROOT_DIR, _PIDS_DIR, _UIDS_DIR, _CTRL_DIR, _CONF_DIR, _NICS_DIR, |
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_CHROOT_DIR, _CHROOT_QUARANTINE_DIR] |
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PARAMETERS = { |
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constants.HV_KERNEL_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_INITRD_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_ROOT_PATH: hv_base.NO_CHECK, |
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constants.HV_KERNEL_ARGS: hv_base.NO_CHECK, |
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constants.HV_ACPI: hv_base.NO_CHECK, |
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constants.HV_SERIAL_CONSOLE: hv_base.NO_CHECK, |
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constants.HV_VNC_BIND_ADDRESS: |
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(False, lambda x: (netutils.IP4Address.IsValid(x) or |
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utils.IsNormAbsPath(x)), |
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"the VNC bind address must be either a valid IP address or an absolute"
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" pathname", None, None), |
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constants.HV_VNC_TLS: hv_base.NO_CHECK, |
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constants.HV_VNC_X509: hv_base.OPT_DIR_CHECK, |
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constants.HV_VNC_X509_VERIFY: hv_base.NO_CHECK, |
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constants.HV_VNC_PASSWORD_FILE: hv_base.OPT_FILE_CHECK, |
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constants.HV_KVM_SPICE_BIND: hv_base.NO_CHECK, # will be checked later
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constants.HV_KVM_SPICE_IP_VERSION: |
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(False, lambda x: (x == constants.IFACE_NO_IP_VERSION_SPECIFIED or |
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x in constants.VALID_IP_VERSIONS),
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"the SPICE IP version should be 4 or 6",
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None, None), |
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constants.HV_KVM_FLOPPY_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_CDROM_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_KVM_CDROM2_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_BOOT_ORDER: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_BO_TYPES),
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constants.HV_NIC_TYPE: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_NIC_TYPES),
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constants.HV_DISK_TYPE: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_DISK_TYPES),
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constants.HV_KVM_CDROM_DISK_TYPE: |
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hv_base.ParamInSet(False, constants.HT_KVM_VALID_DISK_TYPES),
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constants.HV_USB_MOUSE: |
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hv_base.ParamInSet(False, constants.HT_KVM_VALID_MOUSE_TYPES),
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constants.HV_KEYMAP: hv_base.NO_CHECK, |
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constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK, |
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constants.HV_MIGRATION_BANDWIDTH: hv_base.NO_CHECK, |
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constants.HV_MIGRATION_DOWNTIME: hv_base.NO_CHECK, |
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constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK, |
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constants.HV_USE_LOCALTIME: hv_base.NO_CHECK, |
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constants.HV_DISK_CACHE: |
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hv_base.ParamInSet(True, constants.HT_VALID_CACHE_TYPES),
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constants.HV_SECURITY_MODEL: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_SM_TYPES),
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constants.HV_SECURITY_DOMAIN: hv_base.NO_CHECK, |
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constants.HV_KVM_FLAG: |
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hv_base.ParamInSet(False, constants.HT_KVM_FLAG_VALUES),
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constants.HV_VHOST_NET: hv_base.NO_CHECK, |
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constants.HV_KVM_USE_CHROOT: hv_base.NO_CHECK, |
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constants.HV_MEM_PATH: hv_base.OPT_DIR_CHECK, |
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constants.HV_REBOOT_BEHAVIOR: |
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hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS)
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} |
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_MIGRATION_STATUS_RE = re.compile("Migration\s+status:\s+(\w+)",
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re.M | re.I) |
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_MIGRATION_INFO_MAX_BAD_ANSWERS = 5
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_MIGRATION_INFO_RETRY_DELAY = 2
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_VERSION_RE = re.compile(r"\b(\d+)\.(\d+)\.(\d+)\b")
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ANCILLARY_FILES = [ |
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_KVM_NETWORK_SCRIPT, |
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] |
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def __init__(self): |
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hv_base.BaseHypervisor.__init__(self)
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# Let's make sure the directories we need exist, even if the RUN_DIR lives
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# in a tmpfs filesystem or has been otherwise wiped out.
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dirs = [(dname, constants.RUN_DIRS_MODE) for dname in self._DIRS] |
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utils.EnsureDirs(dirs) |
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@classmethod
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def _InstancePidFile(cls, instance_name): |
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"""Returns the instance pidfile.
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"""
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return utils.PathJoin(cls._PIDS_DIR, instance_name)
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@classmethod
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def _InstanceUidFile(cls, instance_name): |
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"""Returns the instance uidfile.
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"""
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return utils.PathJoin(cls._UIDS_DIR, instance_name)
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@classmethod
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def _InstancePidInfo(cls, pid): |
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"""Check pid file for instance information.
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Check that a pid file is associated with an instance, and retrieve
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information from its command line.
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@type pid: string or int
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@param pid: process id of the instance to check
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@rtype: tuple
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@return: (instance_name, memory, vcpus)
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@raise errors.HypervisorError: when an instance cannot be found
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"""
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alive = utils.IsProcessAlive(pid) |
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if not alive: |
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raise errors.HypervisorError("Cannot get info for pid %s" % pid) |
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cmdline_file = utils.PathJoin("/proc", str(pid), "cmdline") |
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try:
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cmdline = utils.ReadFile(cmdline_file) |
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except EnvironmentError, err: |
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raise errors.HypervisorError("Can't open cmdline file for pid %s: %s" % |
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(pid, err)) |
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instance = None
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memory = 0
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vcpus = 0
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arg_list = cmdline.split("\x00")
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while arg_list:
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arg = arg_list.pop(0)
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if arg == "-name": |
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instance = arg_list.pop(0)
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elif arg == "-m": |
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memory = int(arg_list.pop(0)) |
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elif arg == "-smp": |
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vcpus = int(arg_list.pop(0)) |
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if instance is None: |
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raise errors.HypervisorError("Pid %s doesn't contain a ganeti kvm" |
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" instance" % pid)
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return (instance, memory, vcpus)
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def _InstancePidAlive(self, instance_name): |
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"""Returns the instance pidfile, pid, and liveness.
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@type instance_name: string
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@param instance_name: instance name
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@rtype: tuple
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@return: (pid file name, pid, liveness)
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"""
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pidfile = self._InstancePidFile(instance_name)
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pid = utils.ReadPidFile(pidfile) |
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alive = False
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try:
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cmd_instance = self._InstancePidInfo(pid)[0] |
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alive = (cmd_instance == instance_name) |
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except errors.HypervisorError:
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pass
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return (pidfile, pid, alive)
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def _CheckDown(self, instance_name): |
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"""Raises an error unless the given instance is down.
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"""
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alive = self._InstancePidAlive(instance_name)[2] |
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if alive:
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raise errors.HypervisorError("Failed to start instance %s: %s" % |
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(instance_name, "already running"))
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@classmethod
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def _InstanceMonitor(cls, instance_name): |
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"""Returns the instance monitor socket name
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"""
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return utils.PathJoin(cls._CTRL_DIR, "%s.monitor" % instance_name) |
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@classmethod
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def _InstanceSerial(cls, instance_name): |
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"""Returns the instance serial socket name
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"""
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return utils.PathJoin(cls._CTRL_DIR, "%s.serial" % instance_name) |
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@staticmethod
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def _SocatUnixConsoleParams(): |
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"""Returns the correct parameters for socat
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If we have a new-enough socat we can use raw mode with an escape character.
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"""
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if constants.SOCAT_USE_ESCAPE:
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return "raw,echo=0,escape=%s" % constants.SOCAT_ESCAPE_CODE |
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else:
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return "echo=0,icanon=0" |
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@classmethod
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def _InstanceKVMRuntime(cls, instance_name): |
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"""Returns the instance KVM runtime filename
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"""
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return utils.PathJoin(cls._CONF_DIR, "%s.runtime" % instance_name) |
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@classmethod
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def _InstanceChrootDir(cls, instance_name): |
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"""Returns the name of the KVM chroot dir of the instance
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"""
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return utils.PathJoin(cls._CHROOT_DIR, instance_name)
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@classmethod
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def _InstanceNICDir(cls, instance_name): |
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"""Returns the name of the directory holding the tap device files for a
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given instance.
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"""
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return utils.PathJoin(cls._NICS_DIR, instance_name)
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@classmethod
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def _InstanceNICFile(cls, instance_name, seq): |
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"""Returns the name of the file containing the tap device for a given NIC
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"""
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return utils.PathJoin(cls._InstanceNICDir(instance_name), str(seq)) |
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@classmethod
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def _InstanceKeymapFile(cls, instance_name): |
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"""Returns the name of the file containing the keymap for a given instance
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"""
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return utils.PathJoin(cls._KEYMAP_DIR, instance_name)
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@classmethod
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def _TryReadUidFile(cls, uid_file): |
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"""Try to read a uid file
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"""
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if os.path.exists(uid_file):
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try:
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uid = int(utils.ReadOneLineFile(uid_file))
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return uid
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except EnvironmentError: |
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logging.warning("Can't read uid file", exc_info=True) |
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except (TypeError, ValueError): |
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logging.warning("Can't parse uid file contents", exc_info=True) |
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return None |
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|
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@classmethod
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def _RemoveInstanceRuntimeFiles(cls, pidfile, instance_name): |
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"""Removes an instance's rutime sockets/files/dirs.
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|
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"""
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utils.RemoveFile(pidfile) |
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utils.RemoveFile(cls._InstanceMonitor(instance_name)) |
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utils.RemoveFile(cls._InstanceSerial(instance_name)) |
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utils.RemoveFile(cls._InstanceKVMRuntime(instance_name)) |
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utils.RemoveFile(cls._InstanceKeymapFile(instance_name)) |
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uid_file = cls._InstanceUidFile(instance_name) |
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uid = cls._TryReadUidFile(uid_file) |
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utils.RemoveFile(uid_file) |
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if uid is not None: |
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uidpool.ReleaseUid(uid) |
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try:
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shutil.rmtree(cls._InstanceNICDir(instance_name)) |
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except OSError, err: |
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if err.errno != errno.ENOENT:
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raise
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try:
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chroot_dir = cls._InstanceChrootDir(instance_name) |
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utils.RemoveDir(chroot_dir) |
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except OSError, err: |
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if err.errno == errno.ENOTEMPTY:
|
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# The chroot directory is expected to be empty, but it isn't.
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new_chroot_dir = tempfile.mkdtemp(dir=cls._CHROOT_QUARANTINE_DIR, |
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prefix="%s-%s-" %
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(instance_name, |
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utils.TimestampForFilename())) |
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logging.warning("The chroot directory of instance %s can not be"
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" removed as it is not empty. Moving it to the"
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" quarantine instead. Please investigate the"
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" contents (%s) and clean up manually",
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instance_name, new_chroot_dir) |
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utils.RenameFile(chroot_dir, new_chroot_dir) |
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else:
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raise
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|
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@staticmethod
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def _ConfigureNIC(instance, seq, nic, tap): |
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"""Run the network configuration script for a specified NIC
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|
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@param instance: instance we're acting on
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@type instance: instance object
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@param seq: nic sequence number
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@type seq: int
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@param nic: nic we're acting on
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@type nic: nic object
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@param tap: the host's tap interface this NIC corresponds to
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@type tap: str
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|
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"""
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444 |
|
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if instance.tags:
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tags = " ".join(instance.tags)
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else:
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tags = ""
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|
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env = { |
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"PATH": "%s:/sbin:/usr/sbin" % os.environ["PATH"], |
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"INSTANCE": instance.name,
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"MAC": nic.mac,
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"MODE": nic.nicparams[constants.NIC_MODE],
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"INTERFACE": tap,
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"INTERFACE_INDEX": str(seq), |
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"TAGS": tags,
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} |
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|
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if nic.ip:
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env["IP"] = nic.ip
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|
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if nic.nicparams[constants.NIC_LINK]:
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env["LINK"] = nic.nicparams[constants.NIC_LINK]
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|
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if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
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env["BRIDGE"] = nic.nicparams[constants.NIC_LINK]
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|
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result = utils.RunCmd([constants.KVM_IFUP, tap], env=env) |
470 |
if result.failed:
|
471 |
raise errors.HypervisorError("Failed to configure interface %s: %s." |
472 |
" Network configuration script output: %s" %
|
473 |
(tap, result.fail_reason, result.output)) |
474 |
|
475 |
def ListInstances(self): |
476 |
"""Get the list of running instances.
|
477 |
|
478 |
We can do this by listing our live instances directory and
|
479 |
checking whether the associated kvm process is still alive.
|
480 |
|
481 |
"""
|
482 |
result = [] |
483 |
for name in os.listdir(self._PIDS_DIR): |
484 |
if self._InstancePidAlive(name)[2]: |
485 |
result.append(name) |
486 |
return result
|
487 |
|
488 |
def GetInstanceInfo(self, instance_name): |
489 |
"""Get instance properties.
|
490 |
|
491 |
@type instance_name: string
|
492 |
@param instance_name: the instance name
|
493 |
@rtype: tuple of strings
|
494 |
@return: (name, id, memory, vcpus, stat, times)
|
495 |
|
496 |
"""
|
497 |
_, pid, alive = self._InstancePidAlive(instance_name)
|
498 |
if not alive: |
499 |
return None |
500 |
|
501 |
_, memory, vcpus = self._InstancePidInfo(pid)
|
502 |
stat = "---b-"
|
503 |
times = "0"
|
504 |
|
505 |
return (instance_name, pid, memory, vcpus, stat, times)
|
506 |
|
507 |
def GetAllInstancesInfo(self): |
508 |
"""Get properties of all instances.
|
509 |
|
510 |
@return: list of tuples (name, id, memory, vcpus, stat, times)
|
511 |
|
512 |
"""
|
513 |
data = [] |
514 |
for name in os.listdir(self._PIDS_DIR): |
515 |
try:
|
516 |
info = self.GetInstanceInfo(name)
|
517 |
except errors.HypervisorError:
|
518 |
continue
|
519 |
if info:
|
520 |
data.append(info) |
521 |
return data
|
522 |
|
523 |
def _GenerateKVMRuntime(self, instance, block_devices, startup_paused): |
524 |
"""Generate KVM information to start an instance.
|
525 |
|
526 |
"""
|
527 |
_, v_major, v_min, _ = self._GetKVMVersion()
|
528 |
|
529 |
pidfile = self._InstancePidFile(instance.name)
|
530 |
kvm = constants.KVM_PATH |
531 |
kvm_cmd = [kvm] |
532 |
# used just by the vnc server, if enabled
|
533 |
kvm_cmd.extend(["-name", instance.name])
|
534 |
kvm_cmd.extend(["-m", instance.beparams[constants.BE_MEMORY]])
|
535 |
kvm_cmd.extend(["-smp", instance.beparams[constants.BE_VCPUS]])
|
536 |
kvm_cmd.extend(["-pidfile", pidfile])
|
537 |
kvm_cmd.extend(["-daemonize"])
|
538 |
if not instance.hvparams[constants.HV_ACPI]: |
539 |
kvm_cmd.extend(["-no-acpi"])
|
540 |
if startup_paused:
|
541 |
kvm_cmd.extend(["-S"])
|
542 |
if instance.hvparams[constants.HV_REBOOT_BEHAVIOR] == \
|
543 |
constants.INSTANCE_REBOOT_EXIT: |
544 |
kvm_cmd.extend(["-no-reboot"])
|
545 |
|
546 |
hvp = instance.hvparams |
547 |
boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK |
548 |
boot_cdrom = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_CDROM |
549 |
boot_floppy = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_FLOPPY |
550 |
boot_network = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_NETWORK |
551 |
|
552 |
self.ValidateParameters(hvp)
|
553 |
|
554 |
if hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED:
|
555 |
kvm_cmd.extend(["-enable-kvm"])
|
556 |
elif hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_DISABLED:
|
557 |
kvm_cmd.extend(["-disable-kvm"])
|
558 |
|
559 |
if boot_network:
|
560 |
kvm_cmd.extend(["-boot", "n"]) |
561 |
|
562 |
disk_type = hvp[constants.HV_DISK_TYPE] |
563 |
if disk_type == constants.HT_DISK_PARAVIRTUAL:
|
564 |
if_val = ",if=virtio"
|
565 |
else:
|
566 |
if_val = ",if=%s" % disk_type
|
567 |
# Cache mode
|
568 |
disk_cache = hvp[constants.HV_DISK_CACHE] |
569 |
if instance.disk_template in constants.DTS_EXT_MIRROR: |
570 |
if disk_cache != "none": |
571 |
# TODO: make this a hard error, instead of a silent overwrite
|
572 |
logging.warning("KVM: overriding disk_cache setting '%s' with 'none'"
|
573 |
" to prevent shared storage corruption on migration",
|
574 |
disk_cache) |
575 |
cache_val = ",cache=none"
|
576 |
elif disk_cache != constants.HT_CACHE_DEFAULT:
|
577 |
cache_val = ",cache=%s" % disk_cache
|
578 |
else:
|
579 |
cache_val = ""
|
580 |
for cfdev, dev_path in block_devices: |
581 |
if cfdev.mode != constants.DISK_RDWR:
|
582 |
raise errors.HypervisorError("Instance has read-only disks which" |
583 |
" are not supported by KVM")
|
584 |
# TODO: handle FD_LOOP and FD_BLKTAP (?)
|
585 |
boot_val = ""
|
586 |
if boot_disk:
|
587 |
kvm_cmd.extend(["-boot", "c"]) |
588 |
boot_disk = False
|
589 |
if (v_major, v_min) < (0, 14) and disk_type != constants.HT_DISK_IDE: |
590 |
boot_val = ",boot=on"
|
591 |
|
592 |
drive_val = "file=%s,format=raw%s%s%s" % (dev_path, if_val, boot_val,
|
593 |
cache_val) |
594 |
kvm_cmd.extend(["-drive", drive_val])
|
595 |
|
596 |
#Now we can specify a different device type for CDROM devices.
|
597 |
cdrom_disk_type = hvp[constants.HV_KVM_CDROM_DISK_TYPE] |
598 |
if not cdrom_disk_type: |
599 |
cdrom_disk_type = disk_type |
600 |
|
601 |
iso_image = hvp[constants.HV_CDROM_IMAGE_PATH] |
602 |
if iso_image:
|
603 |
options = ",format=raw,media=cdrom"
|
604 |
if boot_cdrom:
|
605 |
kvm_cmd.extend(["-boot", "d"]) |
606 |
if cdrom_disk_type != constants.HT_DISK_IDE:
|
607 |
options = "%s,boot=on,if=%s" % (options, constants.HT_DISK_IDE)
|
608 |
else:
|
609 |
options = "%s,boot=on" % options
|
610 |
else:
|
611 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
612 |
if_val = ",if=virtio"
|
613 |
else:
|
614 |
if_val = ",if=%s" % cdrom_disk_type
|
615 |
options = "%s%s" % (options, if_val)
|
616 |
drive_val = "file=%s%s" % (iso_image, options)
|
617 |
kvm_cmd.extend(["-drive", drive_val])
|
618 |
|
619 |
iso_image2 = hvp[constants.HV_KVM_CDROM2_IMAGE_PATH] |
620 |
if iso_image2:
|
621 |
options = ",format=raw,media=cdrom"
|
622 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
623 |
if_val = ",if=virtio"
|
624 |
else:
|
625 |
if_val = ",if=%s" % cdrom_disk_type
|
626 |
options = "%s%s" % (options, if_val)
|
627 |
drive_val = "file=%s%s" % (iso_image2, options)
|
628 |
kvm_cmd.extend(["-drive", drive_val])
|
629 |
|
630 |
floppy_image = hvp[constants.HV_KVM_FLOPPY_IMAGE_PATH] |
631 |
if floppy_image:
|
632 |
options = ",format=raw,media=disk"
|
633 |
if boot_floppy:
|
634 |
kvm_cmd.extend(["-boot", "a"]) |
635 |
options = "%s,boot=on" % options
|
636 |
if_val = ",if=floppy"
|
637 |
options = "%s%s" % (options, if_val)
|
638 |
drive_val = "file=%s%s" % (floppy_image, options)
|
639 |
kvm_cmd.extend(["-drive", drive_val])
|
640 |
|
641 |
kernel_path = hvp[constants.HV_KERNEL_PATH] |
642 |
if kernel_path:
|
643 |
kvm_cmd.extend(["-kernel", kernel_path])
|
644 |
initrd_path = hvp[constants.HV_INITRD_PATH] |
645 |
if initrd_path:
|
646 |
kvm_cmd.extend(["-initrd", initrd_path])
|
647 |
root_append = ["root=%s" % hvp[constants.HV_ROOT_PATH],
|
648 |
hvp[constants.HV_KERNEL_ARGS]] |
649 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
650 |
root_append.append("console=ttyS0,38400")
|
651 |
kvm_cmd.extend(["-append", " ".join(root_append)]) |
652 |
|
653 |
mem_path = hvp[constants.HV_MEM_PATH] |
654 |
if mem_path:
|
655 |
kvm_cmd.extend(["-mem-path", mem_path, "-mem-prealloc"]) |
656 |
|
657 |
mouse_type = hvp[constants.HV_USB_MOUSE] |
658 |
vnc_bind_address = hvp[constants.HV_VNC_BIND_ADDRESS] |
659 |
|
660 |
if mouse_type:
|
661 |
kvm_cmd.extend(["-usb"])
|
662 |
kvm_cmd.extend(["-usbdevice", mouse_type])
|
663 |
elif vnc_bind_address:
|
664 |
kvm_cmd.extend(["-usbdevice", constants.HT_MOUSE_TABLET])
|
665 |
|
666 |
keymap = hvp[constants.HV_KEYMAP] |
667 |
if keymap:
|
668 |
keymap_path = self._InstanceKeymapFile(instance.name)
|
669 |
# If a keymap file is specified, KVM won't use its internal defaults. By
|
670 |
# first including the "en-us" layout, an error on loading the actual
|
671 |
# layout (e.g. because it can't be found) won't lead to a non-functional
|
672 |
# keyboard. A keyboard with incorrect keys is still better than none.
|
673 |
utils.WriteFile(keymap_path, data="include en-us\ninclude %s\n" % keymap)
|
674 |
kvm_cmd.extend(["-k", keymap_path])
|
675 |
|
676 |
if vnc_bind_address:
|
677 |
if netutils.IP4Address.IsValid(vnc_bind_address):
|
678 |
if instance.network_port > constants.VNC_BASE_PORT:
|
679 |
display = instance.network_port - constants.VNC_BASE_PORT |
680 |
if vnc_bind_address == constants.IP4_ADDRESS_ANY:
|
681 |
vnc_arg = ":%d" % (display)
|
682 |
else:
|
683 |
vnc_arg = "%s:%d" % (vnc_bind_address, display)
|
684 |
else:
|
685 |
logging.error("Network port is not a valid VNC display (%d < %d)."
|
686 |
" Not starting VNC", instance.network_port,
|
687 |
constants.VNC_BASE_PORT) |
688 |
vnc_arg = "none"
|
689 |
|
690 |
# Only allow tls and other option when not binding to a file, for now.
|
691 |
# kvm/qemu gets confused otherwise about the filename to use.
|
692 |
vnc_append = ""
|
693 |
if hvp[constants.HV_VNC_TLS]:
|
694 |
vnc_append = "%s,tls" % vnc_append
|
695 |
if hvp[constants.HV_VNC_X509_VERIFY]:
|
696 |
vnc_append = "%s,x509verify=%s" % (vnc_append,
|
697 |
hvp[constants.HV_VNC_X509]) |
698 |
elif hvp[constants.HV_VNC_X509]:
|
699 |
vnc_append = "%s,x509=%s" % (vnc_append,
|
700 |
hvp[constants.HV_VNC_X509]) |
701 |
if hvp[constants.HV_VNC_PASSWORD_FILE]:
|
702 |
vnc_append = "%s,password" % vnc_append
|
703 |
|
704 |
vnc_arg = "%s%s" % (vnc_arg, vnc_append)
|
705 |
|
706 |
else:
|
707 |
vnc_arg = "unix:%s/%s.vnc" % (vnc_bind_address, instance.name)
|
708 |
|
709 |
kvm_cmd.extend(["-vnc", vnc_arg])
|
710 |
else:
|
711 |
kvm_cmd.extend(["-nographic"])
|
712 |
|
713 |
monitor_dev = ("unix:%s,server,nowait" %
|
714 |
self._InstanceMonitor(instance.name))
|
715 |
kvm_cmd.extend(["-monitor", monitor_dev])
|
716 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
717 |
serial_dev = ("unix:%s,server,nowait" %
|
718 |
self._InstanceSerial(instance.name))
|
719 |
kvm_cmd.extend(["-serial", serial_dev])
|
720 |
else:
|
721 |
kvm_cmd.extend(["-serial", "none"]) |
722 |
|
723 |
spice_bind = hvp[constants.HV_KVM_SPICE_BIND] |
724 |
spice_ip_version = None
|
725 |
if spice_bind:
|
726 |
if netutils.IsValidInterface(spice_bind):
|
727 |
# The user specified a network interface, we have to figure out the IP
|
728 |
# address.
|
729 |
addresses = netutils.GetInterfaceIpAddresses(spice_bind) |
730 |
spice_ip_version = hvp[constants.HV_KVM_SPICE_IP_VERSION] |
731 |
|
732 |
# if the user specified an IP version and the interface does not
|
733 |
# have that kind of IP addresses, throw an exception
|
734 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
735 |
if not addresses[spice_ip_version]: |
736 |
raise errors.HypervisorError("spice: unable to get an IPv%s address" |
737 |
" for %s" % (spice_ip_version,
|
738 |
spice_bind)) |
739 |
|
740 |
# the user did not specify an IP version, we have to figure it out
|
741 |
elif (addresses[constants.IP4_VERSION] and |
742 |
addresses[constants.IP6_VERSION]): |
743 |
# we have both ipv4 and ipv6, let's use the cluster default IP
|
744 |
# version
|
745 |
cluster_family = ssconf.SimpleStore().GetPrimaryIPFamily() |
746 |
spice_ip_version = netutils.IPAddress.GetVersionFromAddressFamily( |
747 |
cluster_family) |
748 |
elif addresses[constants.IP4_VERSION]:
|
749 |
spice_ip_version = constants.IP4_VERSION |
750 |
elif addresses[constants.IP6_VERSION]:
|
751 |
spice_ip_version = constants.IP6_VERSION |
752 |
else:
|
753 |
raise errors.HypervisorError("spice: unable to get an IP address" |
754 |
" for %s" % (spice_bind))
|
755 |
|
756 |
spice_address = addresses[spice_ip_version][0]
|
757 |
|
758 |
else:
|
759 |
# spice_bind is known to be a valid IP address, because
|
760 |
# ValidateParameters checked it.
|
761 |
spice_address = spice_bind |
762 |
|
763 |
spice_arg = "addr=%s,port=%s,disable-ticketing" % (spice_address,
|
764 |
instance.network_port) |
765 |
if spice_ip_version:
|
766 |
spice_arg = "%s,ipv%s" % (spice_arg, spice_ip_version)
|
767 |
|
768 |
logging.info("KVM: SPICE will listen on port %s", instance.network_port)
|
769 |
kvm_cmd.extend(["-spice", spice_arg])
|
770 |
|
771 |
if hvp[constants.HV_USE_LOCALTIME]:
|
772 |
kvm_cmd.extend(["-localtime"])
|
773 |
|
774 |
if hvp[constants.HV_KVM_USE_CHROOT]:
|
775 |
kvm_cmd.extend(["-chroot", self._InstanceChrootDir(instance.name)]) |
776 |
|
777 |
# Save the current instance nics, but defer their expansion as parameters,
|
778 |
# as we'll need to generate executable temp files for them.
|
779 |
kvm_nics = instance.nics |
780 |
hvparams = hvp |
781 |
|
782 |
return (kvm_cmd, kvm_nics, hvparams)
|
783 |
|
784 |
def _WriteKVMRuntime(self, instance_name, data): |
785 |
"""Write an instance's KVM runtime
|
786 |
|
787 |
"""
|
788 |
try:
|
789 |
utils.WriteFile(self._InstanceKVMRuntime(instance_name),
|
790 |
data=data) |
791 |
except EnvironmentError, err: |
792 |
raise errors.HypervisorError("Failed to save KVM runtime file: %s" % err) |
793 |
|
794 |
def _ReadKVMRuntime(self, instance_name): |
795 |
"""Read an instance's KVM runtime
|
796 |
|
797 |
"""
|
798 |
try:
|
799 |
file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
|
800 |
except EnvironmentError, err: |
801 |
raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err) |
802 |
return file_content
|
803 |
|
804 |
def _SaveKVMRuntime(self, instance, kvm_runtime): |
805 |
"""Save an instance's KVM runtime
|
806 |
|
807 |
"""
|
808 |
kvm_cmd, kvm_nics, hvparams = kvm_runtime |
809 |
serialized_nics = [nic.ToDict() for nic in kvm_nics] |
810 |
serialized_form = serializer.Dump((kvm_cmd, serialized_nics, hvparams)) |
811 |
self._WriteKVMRuntime(instance.name, serialized_form)
|
812 |
|
813 |
def _LoadKVMRuntime(self, instance, serialized_runtime=None): |
814 |
"""Load an instance's KVM runtime
|
815 |
|
816 |
"""
|
817 |
if not serialized_runtime: |
818 |
serialized_runtime = self._ReadKVMRuntime(instance.name)
|
819 |
loaded_runtime = serializer.Load(serialized_runtime) |
820 |
kvm_cmd, serialized_nics, hvparams = loaded_runtime |
821 |
kvm_nics = [objects.NIC.FromDict(snic) for snic in serialized_nics] |
822 |
return (kvm_cmd, kvm_nics, hvparams)
|
823 |
|
824 |
def _RunKVMCmd(self, name, kvm_cmd, tap_fds=None): |
825 |
"""Run the KVM cmd and check for errors
|
826 |
|
827 |
@type name: string
|
828 |
@param name: instance name
|
829 |
@type kvm_cmd: list of strings
|
830 |
@param kvm_cmd: runcmd input for kvm
|
831 |
@type tap_fds: list of int
|
832 |
@param tap_fds: fds of tap devices opened by Ganeti
|
833 |
|
834 |
"""
|
835 |
try:
|
836 |
result = utils.RunCmd(kvm_cmd, noclose_fds=tap_fds) |
837 |
finally:
|
838 |
for fd in tap_fds: |
839 |
utils_wrapper.CloseFdNoError(fd) |
840 |
|
841 |
if result.failed:
|
842 |
raise errors.HypervisorError("Failed to start instance %s: %s (%s)" % |
843 |
(name, result.fail_reason, result.output)) |
844 |
if not self._InstancePidAlive(name)[2]: |
845 |
raise errors.HypervisorError("Failed to start instance %s" % name) |
846 |
|
847 |
def _ExecuteKVMRuntime(self, instance, kvm_runtime, incoming=None): |
848 |
"""Execute a KVM cmd, after completing it with some last minute data
|
849 |
|
850 |
@type incoming: tuple of strings
|
851 |
@param incoming: (target_host_ip, port)
|
852 |
|
853 |
"""
|
854 |
# Small _ExecuteKVMRuntime hv parameters programming howto:
|
855 |
# - conf_hvp contains the parameters as configured on ganeti. they might
|
856 |
# have changed since the instance started; only use them if the change
|
857 |
# won't affect the inside of the instance (which hasn't been rebooted).
|
858 |
# - up_hvp contains the parameters as they were when the instance was
|
859 |
# started, plus any new parameter which has been added between ganeti
|
860 |
# versions: it is paramount that those default to a value which won't
|
861 |
# affect the inside of the instance as well.
|
862 |
conf_hvp = instance.hvparams |
863 |
name = instance.name |
864 |
self._CheckDown(name)
|
865 |
|
866 |
temp_files = [] |
867 |
|
868 |
kvm_cmd, kvm_nics, up_hvp = kvm_runtime |
869 |
up_hvp = objects.FillDict(conf_hvp, up_hvp) |
870 |
|
871 |
_, v_major, v_min, _ = self._GetKVMVersion()
|
872 |
|
873 |
# We know it's safe to run as a different user upon migration, so we'll use
|
874 |
# the latest conf, from conf_hvp.
|
875 |
security_model = conf_hvp[constants.HV_SECURITY_MODEL] |
876 |
if security_model == constants.HT_SM_USER:
|
877 |
kvm_cmd.extend(["-runas", conf_hvp[constants.HV_SECURITY_DOMAIN]])
|
878 |
|
879 |
# We have reasons to believe changing something like the nic driver/type
|
880 |
# upon migration won't exactly fly with the instance kernel, so for nic
|
881 |
# related parameters we'll use up_hvp
|
882 |
tapfds = [] |
883 |
taps = [] |
884 |
if not kvm_nics: |
885 |
kvm_cmd.extend(["-net", "none"]) |
886 |
else:
|
887 |
vnet_hdr = False
|
888 |
tap_extra = ""
|
889 |
nic_type = up_hvp[constants.HV_NIC_TYPE] |
890 |
if nic_type == constants.HT_NIC_PARAVIRTUAL:
|
891 |
# From version 0.12.0, kvm uses a new sintax for network configuration.
|
892 |
if (v_major, v_min) >= (0, 12): |
893 |
nic_model = "virtio-net-pci"
|
894 |
vnet_hdr = True
|
895 |
else:
|
896 |
nic_model = "virtio"
|
897 |
|
898 |
if up_hvp[constants.HV_VHOST_NET]:
|
899 |
# vhost_net is only available from version 0.13.0 or newer
|
900 |
if (v_major, v_min) >= (0, 13): |
901 |
tap_extra = ",vhost=on"
|
902 |
else:
|
903 |
raise errors.HypervisorError("vhost_net is configured" |
904 |
" but it is not available")
|
905 |
else:
|
906 |
nic_model = nic_type |
907 |
|
908 |
for nic_seq, nic in enumerate(kvm_nics): |
909 |
tapname, tapfd = _OpenTap(vnet_hdr) |
910 |
tapfds.append(tapfd) |
911 |
taps.append(tapname) |
912 |
if (v_major, v_min) >= (0, 12): |
913 |
nic_val = "%s,mac=%s,netdev=netdev%s" % (nic_model, nic.mac, nic_seq)
|
914 |
tap_val = "type=tap,id=netdev%s,fd=%d%s" % (nic_seq, tapfd, tap_extra)
|
915 |
kvm_cmd.extend(["-netdev", tap_val, "-device", nic_val]) |
916 |
else:
|
917 |
nic_val = "nic,vlan=%s,macaddr=%s,model=%s" % (nic_seq,
|
918 |
nic.mac, nic_model) |
919 |
tap_val = "tap,vlan=%s,fd=%d" % (nic_seq, tapfd)
|
920 |
kvm_cmd.extend(["-net", tap_val, "-net", nic_val]) |
921 |
|
922 |
if incoming:
|
923 |
target, port = incoming |
924 |
kvm_cmd.extend(["-incoming", "tcp:%s:%s" % (target, port)]) |
925 |
|
926 |
# Changing the vnc password doesn't bother the guest that much. At most it
|
927 |
# will surprise people who connect to it. Whether positively or negatively
|
928 |
# it's debatable.
|
929 |
vnc_pwd_file = conf_hvp[constants.HV_VNC_PASSWORD_FILE] |
930 |
vnc_pwd = None
|
931 |
if vnc_pwd_file:
|
932 |
try:
|
933 |
vnc_pwd = utils.ReadOneLineFile(vnc_pwd_file, strict=True)
|
934 |
except EnvironmentError, err: |
935 |
raise errors.HypervisorError("Failed to open VNC password file %s: %s" |
936 |
% (vnc_pwd_file, err)) |
937 |
|
938 |
if conf_hvp[constants.HV_KVM_USE_CHROOT]:
|
939 |
utils.EnsureDirs([(self._InstanceChrootDir(name),
|
940 |
constants.SECURE_DIR_MODE)]) |
941 |
|
942 |
# Configure the network now for starting instances and bridged interfaces,
|
943 |
# during FinalizeMigration for incoming instances' routed interfaces
|
944 |
for nic_seq, nic in enumerate(kvm_nics): |
945 |
if (incoming and |
946 |
nic.nicparams[constants.NIC_MODE] != constants.NIC_MODE_BRIDGED): |
947 |
continue
|
948 |
self._ConfigureNIC(instance, nic_seq, nic, taps[nic_seq])
|
949 |
|
950 |
if security_model == constants.HT_SM_POOL:
|
951 |
ss = ssconf.SimpleStore() |
952 |
uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\n")
|
953 |
all_uids = set(uidpool.ExpandUidPool(uid_pool))
|
954 |
uid = uidpool.RequestUnusedUid(all_uids) |
955 |
try:
|
956 |
username = pwd.getpwuid(uid.GetUid()).pw_name |
957 |
kvm_cmd.extend(["-runas", username])
|
958 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
959 |
except:
|
960 |
uidpool.ReleaseUid(uid) |
961 |
raise
|
962 |
else:
|
963 |
uid.Unlock() |
964 |
utils.WriteFile(self._InstanceUidFile(name), data=uid.AsStr())
|
965 |
else:
|
966 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
967 |
|
968 |
utils.EnsureDirs([(self._InstanceNICDir(instance.name),
|
969 |
constants.RUN_DIRS_MODE)]) |
970 |
for nic_seq, tap in enumerate(taps): |
971 |
utils.WriteFile(self._InstanceNICFile(instance.name, nic_seq),
|
972 |
data=tap) |
973 |
|
974 |
if vnc_pwd:
|
975 |
change_cmd = "change vnc password %s" % vnc_pwd
|
976 |
self._CallMonitorCommand(instance.name, change_cmd)
|
977 |
|
978 |
for filename in temp_files: |
979 |
utils.RemoveFile(filename) |
980 |
|
981 |
def StartInstance(self, instance, block_devices, startup_paused): |
982 |
"""Start an instance.
|
983 |
|
984 |
"""
|
985 |
self._CheckDown(instance.name)
|
986 |
kvm_runtime = self._GenerateKVMRuntime(instance, block_devices,
|
987 |
startup_paused) |
988 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
989 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
990 |
|
991 |
def _CallMonitorCommand(self, instance_name, command): |
992 |
"""Invoke a command on the instance monitor.
|
993 |
|
994 |
"""
|
995 |
socat = ("echo %s | %s STDIO UNIX-CONNECT:%s" %
|
996 |
(utils.ShellQuote(command), |
997 |
constants.SOCAT_PATH, |
998 |
utils.ShellQuote(self._InstanceMonitor(instance_name))))
|
999 |
result = utils.RunCmd(socat) |
1000 |
if result.failed:
|
1001 |
msg = ("Failed to send command '%s' to instance %s."
|
1002 |
" output: %s, error: %s, fail_reason: %s" %
|
1003 |
(command, instance_name, |
1004 |
result.stdout, result.stderr, result.fail_reason)) |
1005 |
raise errors.HypervisorError(msg)
|
1006 |
|
1007 |
return result
|
1008 |
|
1009 |
@classmethod
|
1010 |
def _GetKVMVersion(cls): |
1011 |
"""Return the installed KVM version.
|
1012 |
|
1013 |
@return: (version, v_maj, v_min, v_rev)
|
1014 |
@raise L{errors.HypervisorError}: when the KVM version cannot be retrieved
|
1015 |
|
1016 |
"""
|
1017 |
result = utils.RunCmd([constants.KVM_PATH, "--help"])
|
1018 |
if result.failed:
|
1019 |
raise errors.HypervisorError("Unable to get KVM version") |
1020 |
match = cls._VERSION_RE.search(result.output.splitlines()[0])
|
1021 |
if not match: |
1022 |
raise errors.HypervisorError("Unable to get KVM version") |
1023 |
|
1024 |
return (match.group(0), int(match.group(1)), int(match.group(2)), |
1025 |
int(match.group(3))) |
1026 |
|
1027 |
def StopInstance(self, instance, force=False, retry=False, name=None): |
1028 |
"""Stop an instance.
|
1029 |
|
1030 |
"""
|
1031 |
if name is not None and not force: |
1032 |
raise errors.HypervisorError("Cannot shutdown cleanly by name only") |
1033 |
if name is None: |
1034 |
name = instance.name |
1035 |
acpi = instance.hvparams[constants.HV_ACPI] |
1036 |
else:
|
1037 |
acpi = False
|
1038 |
_, pid, alive = self._InstancePidAlive(name)
|
1039 |
if pid > 0 and alive: |
1040 |
if force or not acpi: |
1041 |
utils.KillProcess(pid) |
1042 |
else:
|
1043 |
self._CallMonitorCommand(name, "system_powerdown") |
1044 |
|
1045 |
def CleanupInstance(self, instance_name): |
1046 |
"""Cleanup after a stopped instance
|
1047 |
|
1048 |
"""
|
1049 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
1050 |
if pid > 0 and alive: |
1051 |
raise errors.HypervisorError("Cannot cleanup a live instance") |
1052 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
1053 |
|
1054 |
def RebootInstance(self, instance): |
1055 |
"""Reboot an instance.
|
1056 |
|
1057 |
"""
|
1058 |
# For some reason if we do a 'send-key ctrl-alt-delete' to the control
|
1059 |
# socket the instance will stop, but now power up again. So we'll resort
|
1060 |
# to shutdown and restart.
|
1061 |
_, _, alive = self._InstancePidAlive(instance.name)
|
1062 |
if not alive: |
1063 |
raise errors.HypervisorError("Failed to reboot instance %s:" |
1064 |
" not running" % instance.name)
|
1065 |
# StopInstance will delete the saved KVM runtime so:
|
1066 |
# ...first load it...
|
1067 |
kvm_runtime = self._LoadKVMRuntime(instance)
|
1068 |
# ...now we can safely call StopInstance...
|
1069 |
if not self.StopInstance(instance): |
1070 |
self.StopInstance(instance, force=True) |
1071 |
# ...and finally we can save it again, and execute it...
|
1072 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
1073 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
1074 |
|
1075 |
def MigrationInfo(self, instance): |
1076 |
"""Get instance information to perform a migration.
|
1077 |
|
1078 |
@type instance: L{objects.Instance}
|
1079 |
@param instance: instance to be migrated
|
1080 |
@rtype: string
|
1081 |
@return: content of the KVM runtime file
|
1082 |
|
1083 |
"""
|
1084 |
return self._ReadKVMRuntime(instance.name) |
1085 |
|
1086 |
def AcceptInstance(self, instance, info, target): |
1087 |
"""Prepare to accept an instance.
|
1088 |
|
1089 |
@type instance: L{objects.Instance}
|
1090 |
@param instance: instance to be accepted
|
1091 |
@type info: string
|
1092 |
@param info: content of the KVM runtime file on the source node
|
1093 |
@type target: string
|
1094 |
@param target: target host (usually ip), on this node
|
1095 |
|
1096 |
"""
|
1097 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
1098 |
incoming_address = (target, instance.hvparams[constants.HV_MIGRATION_PORT]) |
1099 |
self._ExecuteKVMRuntime(instance, kvm_runtime, incoming=incoming_address)
|
1100 |
|
1101 |
def FinalizeMigration(self, instance, info, success): |
1102 |
"""Finalize an instance migration.
|
1103 |
|
1104 |
Stop the incoming mode KVM.
|
1105 |
|
1106 |
@type instance: L{objects.Instance}
|
1107 |
@param instance: instance whose migration is being finalized
|
1108 |
|
1109 |
"""
|
1110 |
if success:
|
1111 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
1112 |
kvm_nics = kvm_runtime[1]
|
1113 |
|
1114 |
for nic_seq, nic in enumerate(kvm_nics): |
1115 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
1116 |
# Bridged interfaces have already been configured
|
1117 |
continue
|
1118 |
try:
|
1119 |
tap = utils.ReadFile(self._InstanceNICFile(instance.name, nic_seq))
|
1120 |
except EnvironmentError, err: |
1121 |
logging.warning("Failed to find host interface for %s NIC #%d: %s",
|
1122 |
instance.name, nic_seq, str(err))
|
1123 |
continue
|
1124 |
try:
|
1125 |
self._ConfigureNIC(instance, nic_seq, nic, tap)
|
1126 |
except errors.HypervisorError, err:
|
1127 |
logging.warning(str(err))
|
1128 |
|
1129 |
self._WriteKVMRuntime(instance.name, info)
|
1130 |
else:
|
1131 |
self.StopInstance(instance, force=True) |
1132 |
|
1133 |
def MigrateInstance(self, instance, target, live): |
1134 |
"""Migrate an instance to a target node.
|
1135 |
|
1136 |
The migration will not be attempted if the instance is not
|
1137 |
currently running.
|
1138 |
|
1139 |
@type instance: L{objects.Instance}
|
1140 |
@param instance: the instance to be migrated
|
1141 |
@type target: string
|
1142 |
@param target: ip address of the target node
|
1143 |
@type live: boolean
|
1144 |
@param live: perform a live migration
|
1145 |
|
1146 |
"""
|
1147 |
instance_name = instance.name |
1148 |
port = instance.hvparams[constants.HV_MIGRATION_PORT] |
1149 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
1150 |
if not alive: |
1151 |
raise errors.HypervisorError("Instance not running, cannot migrate") |
1152 |
|
1153 |
if not live: |
1154 |
self._CallMonitorCommand(instance_name, "stop") |
1155 |
|
1156 |
migrate_command = ("migrate_set_speed %dm" %
|
1157 |
instance.hvparams[constants.HV_MIGRATION_BANDWIDTH]) |
1158 |
self._CallMonitorCommand(instance_name, migrate_command)
|
1159 |
|
1160 |
migrate_command = ("migrate_set_downtime %dms" %
|
1161 |
instance.hvparams[constants.HV_MIGRATION_DOWNTIME]) |
1162 |
self._CallMonitorCommand(instance_name, migrate_command)
|
1163 |
|
1164 |
migrate_command = "migrate -d tcp:%s:%s" % (target, port)
|
1165 |
self._CallMonitorCommand(instance_name, migrate_command)
|
1166 |
|
1167 |
info_command = "info migrate"
|
1168 |
done = False
|
1169 |
broken_answers = 0
|
1170 |
while not done: |
1171 |
result = self._CallMonitorCommand(instance_name, info_command)
|
1172 |
match = self._MIGRATION_STATUS_RE.search(result.stdout)
|
1173 |
if not match: |
1174 |
broken_answers += 1
|
1175 |
if not result.stdout: |
1176 |
logging.info("KVM: empty 'info migrate' result")
|
1177 |
else:
|
1178 |
logging.warning("KVM: unknown 'info migrate' result: %s",
|
1179 |
result.stdout) |
1180 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
1181 |
else:
|
1182 |
status = match.group(1)
|
1183 |
if status == "completed": |
1184 |
done = True
|
1185 |
elif status == "active": |
1186 |
# reset the broken answers count
|
1187 |
broken_answers = 0
|
1188 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
1189 |
elif status == "failed" or status == "cancelled": |
1190 |
if not live: |
1191 |
self._CallMonitorCommand(instance_name, 'cont') |
1192 |
raise errors.HypervisorError("Migration %s at the kvm level" % |
1193 |
status) |
1194 |
else:
|
1195 |
logging.warning("KVM: unknown migration status '%s'", status)
|
1196 |
broken_answers += 1
|
1197 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
1198 |
if broken_answers >= self._MIGRATION_INFO_MAX_BAD_ANSWERS: |
1199 |
raise errors.HypervisorError("Too many 'info migrate' broken answers") |
1200 |
|
1201 |
utils.KillProcess(pid) |
1202 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
1203 |
|
1204 |
def GetNodeInfo(self): |
1205 |
"""Return information about the node.
|
1206 |
|
1207 |
This is just a wrapper over the base GetLinuxNodeInfo method.
|
1208 |
|
1209 |
@return: a dict with the following keys (values in MiB):
|
1210 |
- memory_total: the total memory size on the node
|
1211 |
- memory_free: the available memory on the node for instances
|
1212 |
- memory_dom0: the memory used by the node itself, if available
|
1213 |
|
1214 |
"""
|
1215 |
return self.GetLinuxNodeInfo() |
1216 |
|
1217 |
@classmethod
|
1218 |
def GetInstanceConsole(cls, instance, hvparams, beparams): |
1219 |
"""Return a command for connecting to the console of an instance.
|
1220 |
|
1221 |
"""
|
1222 |
if hvparams[constants.HV_SERIAL_CONSOLE]:
|
1223 |
cmd = [constants.KVM_CONSOLE_WRAPPER, |
1224 |
constants.SOCAT_PATH, utils.ShellQuote(instance.name), |
1225 |
utils.ShellQuote(cls._InstanceMonitor(instance.name)), |
1226 |
"STDIO,%s" % cls._SocatUnixConsoleParams(),
|
1227 |
"UNIX-CONNECT:%s" % cls._InstanceSerial(instance.name)]
|
1228 |
return objects.InstanceConsole(instance=instance.name,
|
1229 |
kind=constants.CONS_SSH, |
1230 |
host=instance.primary_node, |
1231 |
user=constants.GANETI_RUNAS, |
1232 |
command=cmd) |
1233 |
|
1234 |
vnc_bind_address = hvparams[constants.HV_VNC_BIND_ADDRESS] |
1235 |
if vnc_bind_address and instance.network_port > constants.VNC_BASE_PORT: |
1236 |
display = instance.network_port - constants.VNC_BASE_PORT |
1237 |
return objects.InstanceConsole(instance=instance.name,
|
1238 |
kind=constants.CONS_VNC, |
1239 |
host=vnc_bind_address, |
1240 |
port=instance.network_port, |
1241 |
display=display) |
1242 |
|
1243 |
return objects.InstanceConsole(instance=instance.name,
|
1244 |
kind=constants.CONS_MESSAGE, |
1245 |
message=("No serial shell for instance %s" %
|
1246 |
instance.name)) |
1247 |
|
1248 |
def Verify(self): |
1249 |
"""Verify the hypervisor.
|
1250 |
|
1251 |
Check that the binary exists.
|
1252 |
|
1253 |
"""
|
1254 |
if not os.path.exists(constants.KVM_PATH): |
1255 |
return "The kvm binary ('%s') does not exist." % constants.KVM_PATH |
1256 |
if not os.path.exists(constants.SOCAT_PATH): |
1257 |
return "The socat binary ('%s') does not exist." % constants.SOCAT_PATH |
1258 |
|
1259 |
@classmethod
|
1260 |
def CheckParameterSyntax(cls, hvparams): |
1261 |
"""Check the given parameters for validity.
|
1262 |
|
1263 |
@type hvparams: dict
|
1264 |
@param hvparams: dictionary with parameter names/value
|
1265 |
@raise errors.HypervisorError: when a parameter is not valid
|
1266 |
|
1267 |
"""
|
1268 |
super(KVMHypervisor, cls).CheckParameterSyntax(hvparams)
|
1269 |
|
1270 |
kernel_path = hvparams[constants.HV_KERNEL_PATH] |
1271 |
if kernel_path:
|
1272 |
if not hvparams[constants.HV_ROOT_PATH]: |
1273 |
raise errors.HypervisorError("Need a root partition for the instance," |
1274 |
" if a kernel is defined")
|
1275 |
|
1276 |
if (hvparams[constants.HV_VNC_X509_VERIFY] and |
1277 |
not hvparams[constants.HV_VNC_X509]):
|
1278 |
raise errors.HypervisorError("%s must be defined, if %s is" % |
1279 |
(constants.HV_VNC_X509, |
1280 |
constants.HV_VNC_X509_VERIFY)) |
1281 |
|
1282 |
boot_order = hvparams[constants.HV_BOOT_ORDER] |
1283 |
if (boot_order == constants.HT_BO_CDROM and |
1284 |
not hvparams[constants.HV_CDROM_IMAGE_PATH]):
|
1285 |
raise errors.HypervisorError("Cannot boot from cdrom without an" |
1286 |
" ISO path")
|
1287 |
|
1288 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
1289 |
if security_model == constants.HT_SM_USER:
|
1290 |
if not hvparams[constants.HV_SECURITY_DOMAIN]: |
1291 |
raise errors.HypervisorError("A security domain (user to run kvm as)" |
1292 |
" must be specified")
|
1293 |
elif (security_model == constants.HT_SM_NONE or |
1294 |
security_model == constants.HT_SM_POOL): |
1295 |
if hvparams[constants.HV_SECURITY_DOMAIN]:
|
1296 |
raise errors.HypervisorError("Cannot have a security domain when the" |
1297 |
" security model is 'none' or 'pool'")
|
1298 |
|
1299 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
1300 |
if spice_bind:
|
1301 |
spice_ip_version = hvparams[constants.HV_KVM_SPICE_IP_VERSION] |
1302 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
1303 |
# if an IP version is specified, the spice_bind parameter must be an
|
1304 |
# IP of that family
|
1305 |
if (netutils.IP4Address.IsValid(spice_bind) and |
1306 |
spice_ip_version != constants.IP4_VERSION): |
1307 |
raise errors.HypervisorError("spice: got an IPv4 address (%s), but" |
1308 |
" the specified IP version is %s" %
|
1309 |
(spice_bind, spice_ip_version)) |
1310 |
|
1311 |
if (netutils.IP6Address.IsValid(spice_bind) and |
1312 |
spice_ip_version != constants.IP6_VERSION): |
1313 |
raise errors.HypervisorError("spice: got an IPv6 address (%s), but" |
1314 |
" the specified IP version is %s" %
|
1315 |
(spice_bind, spice_ip_version)) |
1316 |
|
1317 |
@classmethod
|
1318 |
def ValidateParameters(cls, hvparams): |
1319 |
"""Check the given parameters for validity.
|
1320 |
|
1321 |
@type hvparams: dict
|
1322 |
@param hvparams: dictionary with parameter names/value
|
1323 |
@raise errors.HypervisorError: when a parameter is not valid
|
1324 |
|
1325 |
"""
|
1326 |
super(KVMHypervisor, cls).ValidateParameters(hvparams)
|
1327 |
|
1328 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
1329 |
if security_model == constants.HT_SM_USER:
|
1330 |
username = hvparams[constants.HV_SECURITY_DOMAIN] |
1331 |
try:
|
1332 |
pwd.getpwnam(username) |
1333 |
except KeyError: |
1334 |
raise errors.HypervisorError("Unknown security domain user %s" |
1335 |
% username) |
1336 |
|
1337 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
1338 |
if spice_bind:
|
1339 |
# only one of VNC and SPICE can be used currently.
|
1340 |
if hvparams[constants.HV_VNC_BIND_ADDRESS]:
|
1341 |
raise errors.HypervisorError("both SPICE and VNC are configured, but" |
1342 |
" only one of them can be used at a"
|
1343 |
" given time.")
|
1344 |
|
1345 |
# KVM version should be >= 0.14.0
|
1346 |
_, v_major, v_min, _ = cls._GetKVMVersion() |
1347 |
if (v_major, v_min) < (0, 14): |
1348 |
raise errors.HypervisorError("spice is configured, but it is not" |
1349 |
" available in versions of KVM < 0.14")
|
1350 |
|
1351 |
# if spice_bind is not an IP address, it must be a valid interface
|
1352 |
bound_to_addr = (netutils.IP4Address.IsValid(spice_bind) |
1353 |
or netutils.IP6Address.IsValid(spice_bind))
|
1354 |
if not bound_to_addr and not netutils.IsValidInterface(spice_bind): |
1355 |
raise errors.HypervisorError("spice: the %s parameter must be either" |
1356 |
" a valid IP address or interface name" %
|
1357 |
constants.HV_KVM_SPICE_BIND) |
1358 |
|
1359 |
@classmethod
|
1360 |
def PowercycleNode(cls): |
1361 |
"""KVM powercycle, just a wrapper over Linux powercycle.
|
1362 |
|
1363 |
"""
|
1364 |
cls.LinuxPowercycle() |