agent/conf/agent.properties - cloudstack - Git at Google

 # Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
 # regarding copyright ownership.  The ASF licenses this file
 # to you under the Apache License, Version 2.0 (the
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
 #
 #   http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.

 # Sample configuration file for CloudStack agent

 # MANDATORY: The GUID to identify the agent with.
 # Generated with "uuidgen"
 guid=

 # The java class which the agent loads to execute.
 resource=com.cloud.hypervisor.kvm.resource.LibvirtComputingResource

 # The number of threads running in the agent.
 workers=5

 # The IP address of the management server.
 host=localhost

 # The time interval (in seconds) after which agent will check if the connected host
 # is the preferred host (the first host in the comma-separated list is the preferred
 # one). After that interval, if the agent is connected to one of the secondary/backup hosts,
 # it will attempt to reconnect to the preferred host.
 # The timer task is scheduled after the	 agent connects to a management server.
 # On connection, it receives admin configured
 # cluster-level 'indirect.agent.lb.check.interval' setting that will be used by
 # the agent as the preferred host check interval, however, if the following setting
 # is defined it will override the received value. The value 0 and lb algorithm 'shuffle'
 # disables this background task.
 #host.lb.check.interval=

 # The port that the management server is listening on.
 port=8250

 # The cluster which the agent belongs to.
 cluster=default

 # The pod which the agent belongs to.
 pod=default

 # The zone which the agent belongs to.
 zone=default

 # The public NIC device.
 # If this is commented, it will be autodetected on service startup.
 #public.network.device=cloudbr0

 # The private NIC device.
 # If this is commented, it will be autodetected on service startup.
 #private.network.device=cloudbr1

 # The guest NIC device.
 # If this is commented, the value of the private NIC device will be used.
 #guest.network.device=

 # Local storage path. Multiple values can be entered and separated by commas.
 #local.storage.path=/var/lib/libvirt/images/

 # Directory where Qemu sockets are placed.
 # These sockets are for the Qemu Guest Agent and SSVM provisioning.
 # Make sure that AppArmor or SELinux allow libvirt to write there.
 #qemu.sockets.path=/var/lib/libvirt/qemu

 # MANDATORY: The UUID for the local storage pool. Multiple values can be entered and separated by commas.
 # Generated with "uuidgen".
 local.storage.uuid=

 # Location for KVM virtual router scripts.
 # The path defined in this property is relative to the directory "/usr/share/cloudstack-common/".
 domr.scripts.dir=scripts/network/domr/kvm

 # The timeout (in ms) for time-consuming operations, such as create/copy a snapshot.
 #cmds.timeout=7200

 # This parameter sets the VM migration speed.
 # By default, it will try to guess the speed of the guest network and consume all possible bandwidth.
 # The default value is -1, which means that the agent will use all possible bandwidth.
 # When entering a value, make sure to enter it in megabytes per second.
 #vm.migrate.speed=-1

 # Sets target downtime (in ms) at end of livemigration, the 'hiccup' for final copy.
 # Higher numbers make livemigration easier, lower numbers may cause migration to never complete.
 # Less than 1 means hypervisor default (20ms).
 #vm.migrate.downtime=-1

 # Busy VMs may never finish migrating, depending on environment.
 # Therefore, if configured, this option will pause the VM after the time entered (in ms) to force the migration to finish.
 # Less than 1 means disabled.
 #vm.migrate.pauseafter=-1

 # Time (in seconds) to wait for VM migraton to finish. Less than 1 means disabled.
 # If the VM migration is not finished in the time, the VM job will be cancelled by libvirt.
 # It will be configured by cloudstack management server when cloudstack agent connects.
 # please change the global setting 'migratewait' if needed (migratewait default value: 3600).
 #vm.migrate.wait=-1

 # ---------------- AGENT HOOKS -----------------
 # Agent hooks is the way to override default agent behavior to extend the functionality without excessive coding
 # for a custom deployment.
 # There are 3 arguments needed for the hook to be called: the base directory (defined in agent.hooks.basedir),
 # the name of the script that is located in the base directory (defined in agent.hooks.*.script)
 # and the method that is going to be called on the script (defined in agent.hooks.*.method).
 # These properties are detailed below.
 # Hooks are implemented in Groovy and must be implemented in a way
 # that keeps default CS behavior if something goes wrong.

 # All hooks are located in a special directory defined in 'agent.hooks.basedir'.
 # agent.hooks.basedir=/etc/cloudstack/agent/hooks

 # Every hook has two major attributes - script name, specified in 'agent.hooks.*.script' and method name
 # specified in 'agent.hooks.*.method'.

 # Libvirt XML transformer hook does XML-to-XML transformation, which allows the provider to modify
 # VM XML specification before is sent to libvirt.
 # The provider can use this to add/remove/modify some sort of attributes in Libvirt XML domain specification.
 #agent.hooks.libvirt_vm_xml_transformer.script=libvirt-vm-xml-transformer.groovy
 #agent.hooks.libvirt_vm_xml_transformer.method=transform

 # The hook is called right after libvirt successfully launched the VM.
 #agent.hooks.libvirt_vm_on_start.script=libvirt-vm-state-change.groovy
 #agent.hooks.libvirt_vm_on_start.method=onStart

 # The hook is called right after libvirt successfully stopped the VM.
 #agent.hooks.libvirt_vm_on_stop.script=libvirt-vm-state-change.groovy
 #agent.hooks.libvirt_vm_on_stop.method=onStop
 # ---------------- END AGENT HOOKS ---------------

 # Sets the type of bridge used on the hypervisor. This defines what commands the resource
 # will use to setup networking.
 # Possible Values: native | openvswitch
 #network.bridge.type=native

 # Sets the driver used to plug and unplug NICs from the bridges.
 # A sensible default value will be selected based on the network.bridge.type but can
 # be overridden here.
 # Also used to enable direct networking in libvirt (see properties below).
 # Default value when network.bridge.type as native = com.cloud.hypervisor.kvm.resource.BridgeVifDriver
 # Default value when network.bridge.type as openvswitch = com.cloud.hypervisor.kvm.resource.OvsVifDriver
 #libvirt.vif.driver=

 # Settings to enable direct networking in libvirt.
 # Should not be used on hosts that run system VMs.
 # Possible values for mode: private | bridge | vepa
 #libvirt.vif.driver=com.cloud.hypervisor.kvm.resource.DirectVifDriver
 #network.direct.source.mode=private
 #network.direct.device=eth0

 # Sets DPDK Support on OpenVswitch.
 #openvswitch.dpdk.enabled=false
 #openvswitch.dpdk.ovs.path=

 # Sets the hypervisor type.
 # Possible values: kvm | lxc
 hypervisor.type=kvm

 # This parameter specifies a directory on the host local storage for temporary storing direct download templates.
 #direct.download.temporary.download.location=/var/lib/libvirt/images

 # This parameter specifies a directory on the host local storage for creating and hosting the config drives.
 #host.cache.location=/var/cache/cloud

 # Sets the rolling maintenance hook scripts directory.
 # Default is null, however, can be used as /etc/cloudstack/agent/hooks.d
 #rolling.maintenance.hooks.dir=

 # Disables the rolling maintenance service execution.
 #rolling.maintenance.service.executor.disabled=false

 # Sets the hypervisor URI. If null (default), the value defaults according the hypervisor.type:
 # For KVM: qemu:///system
 # For LXC: lxc:///
 #hypervisor.uri=

 # Setting to enable the CPU model to KVM guest globally.
 # Possible values: custom | host-model | host-passthrough
 # - custom: user customs the CPU model, which is specified by property guest.cpu.model.
 # - host-model: identifies the named CPU model which most closely matches the host,
 # and then requests additional CPU flags to complete the match. This should give
 # close to maximum functionality/performance, which maintains good
 # reliability/compatibility if the guest is migrated to another host with slightly different host CPUs.
 # - host-passthrough: tells KVM to passthrough the host CPU with no modifications.
 # It is different from host-model because instead of just matching feature flags,
 # every last detail of the host CPU is matched. This gives absolutely best performance,
 # and can be important to some apps which check low level CPU details,
 # but it comes at a cost with migration. The guest can only be migrated to
 # an exactly matching host CPU.
 # If null (default), libvirt defaults to custom
 #guest.cpu.mode=

 # Custom CPU model. This param is only valid if guest.cpu.mode=custom.
 # Possible values:"Conroe" | "Penryn" | "Nehalem" | "Westmere" | "pentiumpro" etc.
 # Run virsh capabilities for more details.
 #guest.cpu.model=

 # This param will set the CPU architecture for the domain to override what
 # the management server would send.
 # In case of arm64 (aarch64), this will change the machine type to 'virt' and
 # adds a SCSI and a USB controller in the domain xml.
 # Possible values: x86_64 | aarch64
 # If null (default), defaults to the VM's OS architecture
 #guest.cpu.arch=

 # This param will require CPU features on the CPU section.
 # The features listed in this property must be separated by a blank space (e.g.: vmx vme)
 #guest.cpu.features=

 # Disables memory ballooning on VM guests for overcommit.
 # By default overcommit feature enables balloon and sets currentMemory to a minimum value.
 #vm.memballoon.disable=false

 # The time interval (in seconds) at which the balloon driver will get memory stats updates.
 # This is equivalent to Libvirt's --period parameter when using the dommemstat command.
 # vm.memballoon.stats.period=0

 # Set to true to check disk activity on VM's disks before starting a VM. This only applies
 # to QCOW2 files, and ensures that there is no other running instance accessing
 # the file before starting. It works by checking the modified time against the current time,
 # so care must be taken to ensure that the cluster's time is synchronized, otherwise VMs may fail to start.
 #vm.diskactivity.checkenabled=false

 # Timeout (in seconds) for giving up on waiting for VM's disk files to become inactive.
 # Hitting this timeout will result in failure to start VM.
 # Value must be > 0.
 #vm.diskactivity.checktimeout_s=120

 # This is the length of time (in ms) that the disk needs to be inactive in order to pass the check.
 # This means current time minus time of disk file needs to be greater than this number.
 # It also has the side effect of setting the minimum threshold between a stop and start of
 # a given VM.
 #vm.diskactivity.inactivetime_ms=30000

 # Some newer linux kernels are incapable of reliably migrating VMs with KVMclock.
 # This is a workaround for the bug, admin can set this to true per-host.
 #kvmclock.disable=false

 # This enables the VirtIO Random Number Generator (RNG) device for guests.
 #vm.rng.enable=false

 # The model of VirtIO Random Number Generator (RNG) to present to the Guest.
 # Currently only 'random' is supported.
 #vm.rng.model=random

 # Local Random Number Device Generator to use for VirtIO RNG for Guests.
 # This is usually /dev/random, but it might be different per platform.
 #vm.rng.path=/dev/random

 # The amount of bytes the Guest may request/obtain from the RNG in the period
 # specified in the property vm.rng.rate.period.
 #vm.rng.rate.bytes=2048

 # The number of milliseconds in which the guest is allowed to obtain the bytes
 # specified  in the property vm.rng.rate.bytes.
 #vm.rng.rate.period=1000

 # Timeout value for aggregation commands to be sent to the virtual router (in seconds).
 #router.aggregation.command.each.timeout=

 # Allows virtually increase the amount of RAM (in MB) available on the host.
 # This property can be useful if the host uses  Zswap, KSM features and other memory compressing technologies.
 # For example: if the host has 2GB of RAM and this property is set to 2048, the amount of RAM of the host will be read as 4GB.
 #host.overcommit.mem.mb=0

 # How much host memory (in MB) to reserve for non-allocation.
 # A useful parameter if a node uses some other software that requires memory,
 # or in case that OOM Killer kicks in.
 # If this parameter is used, property host.overcommit.mem.mb must be set to 0.
 #host.reserved.mem.mb=1024

 # The model of Watchdog timer to present to the Guest.
 # For all models refer to the libvirt documentation.
 #vm.watchdog.model=i6300esb

 # Action to take when the Guest/Instance is no longer notifying the Watchdog timer.
 # For all actions refer to the libvirt documentation.
 # Possible values: none | reset | poweroff
 #vm.watchdog.action=none

 # Automatically clean up iSCSI sessions not attached to any VM.
 # Should be enabled for users using managed storage (for example solidfire).
 # Should be disabled for users with unmanaged iSCSI connections on their hosts.
 iscsi.session.cleanup.enabled=false

 # The heartbeat update timeout (in ms).
 # Depending on the use case, this timeout might need increasing/decreasing.
 #heartbeat.update.timeout=60000

 # The timeout (in seconds) to retrieve the target's domain id when migrating a VM with KVM.
 #vm.migrate.domain.retrieve.timeout=10

 # This parameter specifies if the host must be rebooted when something goes wrong with the heartbeat.
 #reboot.host.and.alert.management.on.heartbeat.timeout=true

 # Enables manually setting CPU's topology on KVM's VM.
 #enable.manually.setting.cpu.topology.on.kvm.vm=true

 # Manually sets the host CPU MHz, in cases where CPU scaling support detects the value is wrong.
 #host.cpu.manual.speed.mhz=0

 # Defines the location for Hypervisor scripts.
 # The path defined in this property is relative.
 # To locate the script, ACS first tries to concatenate
 # the property path with "/usr/share/cloudstack-agent/lib/".
 # If it fails, it will test each folder of the path,
 # decreasing one by one, until it reaches root.
 # If the script is not found, ACS will repeat the same
 # steps concatenating the property path with "/usr/share/cloudstack-common/".
 # The path defined in this property is relative
 # to the directory "/usr/share/cloudstack-common/".
 #hypervisor.scripts.dir=scripts/vm/hypervisor

 # Defines the location for KVM scripts.
 # The path defined in this property is relative.
 # To locate the script, ACS first tries to concatenate
 # the property path with "/usr/share/cloudstack-agent/lib/".
 # If it fails, it will test each folder of the path,
 # decreasing one by one, until it reaches root.
 # If the script is not found, ACS will repeat the same
 # steps concatenating the property path with "/usr/share/cloudstack-common/".
 # The path defined in this property is relative
 # to the directory "/usr/share/cloudstack-common/".
 #kvm.scripts.dir=scripts/vm/hypervisor/kvm

 # Specifies start MAC address for private IP range.
 #private.macaddr.start=00:16:3e:77:e2:a0

 # Specifies start IP address for private IP range.
 #private.ipaddr.start=192.168.166.128

 # Defines Local Bridge Name.
 #private.bridge.name=

 # Defines private network name.
 #private.network.name=

 # Defines the location for network scripts.
 # The path defined in this property is relative.
 # To locate the script, ACS first tries to concatenate
 # the property path with "/usr/share/cloudstack-agent/lib/".
 # If it fails, it will test each folder of the path,
 # decreasing one by one, until it reaches root.
 # If the script is not found, ACS will repeat the same
 # steps concatenating the property path with "/usr/share/cloudstack-common/".
 # The path defined in this property is relative
 # to the directory "/usr/share/cloudstack-common/".
 #network.scripts.dir=scripts/vm/network/vnet

 # Defines the location for storage scripts.
 # The path defined in this property is relative.
 # To locate the script, ACS first tries to concatenate
 # the property path with "/usr/share/cloudstack-agent/lib/".
 # If it fails, it will test each folder of the path,
 # decreasing one by one, until it reaches root.
 # If the script is not found, ACS will repeat the same
 # steps concatenating the property path with "/usr/share/cloudstack-common/".
 # The path defined in this property is relative
 # to the directory "/usr/share/cloudstack-common/".
 #storage.scripts.dir=scripts/storage/qcow2

 # Time (in seconds) to wait for the VM to shutdown gracefully.
 # If the time is exceeded shutdown will be forced.
 #stop.script.timeout=120

 # Definition of VMs video model type.
 #vm.video.hardware=

 # Definition of VMs video, specifies the amount of RAM in kibibytes (blocks of 1024 bytes).
 #vm.video.ram=0

 # System VM ISO path.
 #systemvm.iso.path=

 # If set to "true", allows override of the properties: private.macaddr.start, private.ipaddr.start, private.ipaddr.end.
 #developer=false

 # Can only be used if property developer = true. This property is used to define the link local bridge name and private network name.
 #instance=

 # Shows the path to the base directory in which NFS servers are going to be mounted.
 #mount.path=/mnt

 # Port listened by the console proxy.
 #consoleproxy.httpListenPort=443

 #ping.retries=5

 # The number of iothreads. There should be only 1 or 2 IOThreads per VM CPU (default is 1). The recommended number of iothreads is 1
 # iothreads=1
	# Licensed to the Apache Software Foundation (ASF) under one
	# or more contributor license agreements. See the NOTICE file
	# distributed with this work for additional information
	# regarding copyright ownership. The ASF licenses this file
	# to you under the Apache License, Version 2.0 (the
	# "License"); you may not use this file except in compliance
	# with the License. You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing,
	# software distributed under the License is distributed on an
	# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	# KIND, either express or implied. See the License for the
	# specific language governing permissions and limitations
	# under the License.

	# Sample configuration file for CloudStack agent

	# MANDATORY: The GUID to identify the agent with.
	# Generated with "uuidgen"
	guid=

	# The java class which the agent loads to execute.
	resource=com.cloud.hypervisor.kvm.resource.LibvirtComputingResource

	# The number of threads running in the agent.
	workers=5

	# The IP address of the management server.
	host=localhost

	# The time interval (in seconds) after which agent will check if the connected host
	# is the preferred host (the first host in the comma-separated list is the preferred
	# one). After that interval, if the agent is connected to one of the secondary/backup hosts,
	# it will attempt to reconnect to the preferred host.
	# The timer task is scheduled after the agent connects to a management server.
	# On connection, it receives admin configured
	# cluster-level 'indirect.agent.lb.check.interval' setting that will be used by
	# the agent as the preferred host check interval, however, if the following setting
	# is defined it will override the received value. The value 0 and lb algorithm 'shuffle'
	# disables this background task.
	#host.lb.check.interval=

	# The port that the management server is listening on.
	port=8250

	# The cluster which the agent belongs to.
	cluster=default

	# The pod which the agent belongs to.
	pod=default

	# The zone which the agent belongs to.
	zone=default

	# The public NIC device.
	# If this is commented, it will be autodetected on service startup.
	#public.network.device=cloudbr0

	# The private NIC device.
	# If this is commented, it will be autodetected on service startup.
	#private.network.device=cloudbr1

	# The guest NIC device.
	# If this is commented, the value of the private NIC device will be used.
	#guest.network.device=

	# Local storage path. Multiple values can be entered and separated by commas.
	#local.storage.path=/var/lib/libvirt/images/

	# Directory where Qemu sockets are placed.
	# These sockets are for the Qemu Guest Agent and SSVM provisioning.
	# Make sure that AppArmor or SELinux allow libvirt to write there.
	#qemu.sockets.path=/var/lib/libvirt/qemu

	# MANDATORY: The UUID for the local storage pool. Multiple values can be entered and separated by commas.
	# Generated with "uuidgen".
	local.storage.uuid=

	# Location for KVM virtual router scripts.
	# The path defined in this property is relative to the directory "/usr/share/cloudstack-common/".
	domr.scripts.dir=scripts/network/domr/kvm

	# The timeout (in ms) for time-consuming operations, such as create/copy a snapshot.
	#cmds.timeout=7200

	# This parameter sets the VM migration speed.
	# By default, it will try to guess the speed of the guest network and consume all possible bandwidth.
	# The default value is -1, which means that the agent will use all possible bandwidth.
	# When entering a value, make sure to enter it in megabytes per second.
	#vm.migrate.speed=-1

	# Sets target downtime (in ms) at end of livemigration, the 'hiccup' for final copy.
	# Higher numbers make livemigration easier, lower numbers may cause migration to never complete.
	# Less than 1 means hypervisor default (20ms).
	#vm.migrate.downtime=-1

	# Busy VMs may never finish migrating, depending on environment.
	# Therefore, if configured, this option will pause the VM after the time entered (in ms) to force the migration to finish.
	# Less than 1 means disabled.
	#vm.migrate.pauseafter=-1

	# Time (in seconds) to wait for VM migraton to finish. Less than 1 means disabled.
	# If the VM migration is not finished in the time, the VM job will be cancelled by libvirt.
	# It will be configured by cloudstack management server when cloudstack agent connects.
	# please change the global setting 'migratewait' if needed (migratewait default value: 3600).
	#vm.migrate.wait=-1

	# ---------------- AGENT HOOKS -----------------
	# Agent hooks is the way to override default agent behavior to extend the functionality without excessive coding
	# for a custom deployment.
	# There are 3 arguments needed for the hook to be called: the base directory (defined in agent.hooks.basedir),
	# the name of the script that is located in the base directory (defined in agent.hooks.*.script)
	# and the method that is going to be called on the script (defined in agent.hooks.*.method).
	# These properties are detailed below.
	# Hooks are implemented in Groovy and must be implemented in a way
	# that keeps default CS behavior if something goes wrong.

	# All hooks are located in a special directory defined in 'agent.hooks.basedir'.
	# agent.hooks.basedir=/etc/cloudstack/agent/hooks

	# Every hook has two major attributes - script name, specified in 'agent.hooks.*.script' and method name
	# specified in 'agent.hooks.*.method'.

	# Libvirt XML transformer hook does XML-to-XML transformation, which allows the provider to modify
	# VM XML specification before is sent to libvirt.
	# The provider can use this to add/remove/modify some sort of attributes in Libvirt XML domain specification.
	#agent.hooks.libvirt_vm_xml_transformer.script=libvirt-vm-xml-transformer.groovy
	#agent.hooks.libvirt_vm_xml_transformer.method=transform

	# The hook is called right after libvirt successfully launched the VM.
	#agent.hooks.libvirt_vm_on_start.script=libvirt-vm-state-change.groovy
	#agent.hooks.libvirt_vm_on_start.method=onStart

	# The hook is called right after libvirt successfully stopped the VM.
	#agent.hooks.libvirt_vm_on_stop.script=libvirt-vm-state-change.groovy
	#agent.hooks.libvirt_vm_on_stop.method=onStop
	# ---------------- END AGENT HOOKS ---------------

	# Sets the type of bridge used on the hypervisor. This defines what commands the resource
	# will use to setup networking.
	# Possible Values: native \| openvswitch
	#network.bridge.type=native

	# Sets the driver used to plug and unplug NICs from the bridges.
	# A sensible default value will be selected based on the network.bridge.type but can
	# be overridden here.
	# Also used to enable direct networking in libvirt (see properties below).
	# Default value when network.bridge.type as native = com.cloud.hypervisor.kvm.resource.BridgeVifDriver
	# Default value when network.bridge.type as openvswitch = com.cloud.hypervisor.kvm.resource.OvsVifDriver
	#libvirt.vif.driver=

	# Settings to enable direct networking in libvirt.
	# Should not be used on hosts that run system VMs.
	# Possible values for mode: private \| bridge \| vepa
	#libvirt.vif.driver=com.cloud.hypervisor.kvm.resource.DirectVifDriver
	#network.direct.source.mode=private
	#network.direct.device=eth0

	# Sets DPDK Support on OpenVswitch.
	#openvswitch.dpdk.enabled=false
	#openvswitch.dpdk.ovs.path=

	# Sets the hypervisor type.
	# Possible values: kvm \| lxc
	hypervisor.type=kvm

	# This parameter specifies a directory on the host local storage for temporary storing direct download templates.
	#direct.download.temporary.download.location=/var/lib/libvirt/images

	# This parameter specifies a directory on the host local storage for creating and hosting the config drives.
	#host.cache.location=/var/cache/cloud

	# Sets the rolling maintenance hook scripts directory.
	# Default is null, however, can be used as /etc/cloudstack/agent/hooks.d
	#rolling.maintenance.hooks.dir=

	# Disables the rolling maintenance service execution.
	#rolling.maintenance.service.executor.disabled=false

	# Sets the hypervisor URI. If null (default), the value defaults according the hypervisor.type:
	# For KVM: qemu:///system
	# For LXC: lxc:///
	#hypervisor.uri=

	# Setting to enable the CPU model to KVM guest globally.
	# Possible values: custom \| host-model \| host-passthrough
	# - custom: user customs the CPU model, which is specified by property guest.cpu.model.
	# - host-model: identifies the named CPU model which most closely matches the host,
	# and then requests additional CPU flags to complete the match. This should give
	# close to maximum functionality/performance, which maintains good
	# reliability/compatibility if the guest is migrated to another host with slightly different host CPUs.
	# - host-passthrough: tells KVM to passthrough the host CPU with no modifications.
	# It is different from host-model because instead of just matching feature flags,
	# every last detail of the host CPU is matched. This gives absolutely best performance,
	# and can be important to some apps which check low level CPU details,
	# but it comes at a cost with migration. The guest can only be migrated to
	# an exactly matching host CPU.
	# If null (default), libvirt defaults to custom
	#guest.cpu.mode=

	# Custom CPU model. This param is only valid if guest.cpu.mode=custom.
	# Possible values:"Conroe" \| "Penryn" \| "Nehalem" \| "Westmere" \| "pentiumpro" etc.
	# Run virsh capabilities for more details.
	#guest.cpu.model=

	# This param will set the CPU architecture for the domain to override what
	# the management server would send.
	# In case of arm64 (aarch64), this will change the machine type to 'virt' and
	# adds a SCSI and a USB controller in the domain xml.
	# Possible values: x86_64 \| aarch64
	# If null (default), defaults to the VM's OS architecture
	#guest.cpu.arch=

	# This param will require CPU features on the CPU section.
	# The features listed in this property must be separated by a blank space (e.g.: vmx vme)
	#guest.cpu.features=

	# Disables memory ballooning on VM guests for overcommit.
	# By default overcommit feature enables balloon and sets currentMemory to a minimum value.
	#vm.memballoon.disable=false

	# The time interval (in seconds) at which the balloon driver will get memory stats updates.
	# This is equivalent to Libvirt's --period parameter when using the dommemstat command.
	# vm.memballoon.stats.period=0

	# Set to true to check disk activity on VM's disks before starting a VM. This only applies
	# to QCOW2 files, and ensures that there is no other running instance accessing
	# the file before starting. It works by checking the modified time against the current time,
	# so care must be taken to ensure that the cluster's time is synchronized, otherwise VMs may fail to start.
	#vm.diskactivity.checkenabled=false

	# Timeout (in seconds) for giving up on waiting for VM's disk files to become inactive.
	# Hitting this timeout will result in failure to start VM.
	# Value must be > 0.
	#vm.diskactivity.checktimeout_s=120

	# This is the length of time (in ms) that the disk needs to be inactive in order to pass the check.
	# This means current time minus time of disk file needs to be greater than this number.
	# It also has the side effect of setting the minimum threshold between a stop and start of
	# a given VM.
	#vm.diskactivity.inactivetime_ms=30000

	# Some newer linux kernels are incapable of reliably migrating VMs with KVMclock.
	# This is a workaround for the bug, admin can set this to true per-host.
	#kvmclock.disable=false

	# This enables the VirtIO Random Number Generator (RNG) device for guests.
	#vm.rng.enable=false

	# The model of VirtIO Random Number Generator (RNG) to present to the Guest.
	# Currently only 'random' is supported.
	#vm.rng.model=random

	# Local Random Number Device Generator to use for VirtIO RNG for Guests.
	# This is usually /dev/random, but it might be different per platform.
	#vm.rng.path=/dev/random

	# The amount of bytes the Guest may request/obtain from the RNG in the period
	# specified in the property vm.rng.rate.period.
	#vm.rng.rate.bytes=2048

	# The number of milliseconds in which the guest is allowed to obtain the bytes
	# specified in the property vm.rng.rate.bytes.
	#vm.rng.rate.period=1000

	# Timeout value for aggregation commands to be sent to the virtual router (in seconds).
	#router.aggregation.command.each.timeout=

	# Allows virtually increase the amount of RAM (in MB) available on the host.
	# This property can be useful if the host uses Zswap, KSM features and other memory compressing technologies.
	# For example: if the host has 2GB of RAM and this property is set to 2048, the amount of RAM of the host will be read as 4GB.
	#host.overcommit.mem.mb=0

	# How much host memory (in MB) to reserve for non-allocation.
	# A useful parameter if a node uses some other software that requires memory,
	# or in case that OOM Killer kicks in.
	# If this parameter is used, property host.overcommit.mem.mb must be set to 0.
	#host.reserved.mem.mb=1024

	# The model of Watchdog timer to present to the Guest.
	# For all models refer to the libvirt documentation.
	#vm.watchdog.model=i6300esb

	# Action to take when the Guest/Instance is no longer notifying the Watchdog timer.
	# For all actions refer to the libvirt documentation.
	# Possible values: none \| reset \| poweroff
	#vm.watchdog.action=none

	# Automatically clean up iSCSI sessions not attached to any VM.
	# Should be enabled for users using managed storage (for example solidfire).
	# Should be disabled for users with unmanaged iSCSI connections on their hosts.
	iscsi.session.cleanup.enabled=false

	# The heartbeat update timeout (in ms).
	# Depending on the use case, this timeout might need increasing/decreasing.
	#heartbeat.update.timeout=60000

	# The timeout (in seconds) to retrieve the target's domain id when migrating a VM with KVM.
	#vm.migrate.domain.retrieve.timeout=10

	# This parameter specifies if the host must be rebooted when something goes wrong with the heartbeat.
	#reboot.host.and.alert.management.on.heartbeat.timeout=true

	# Enables manually setting CPU's topology on KVM's VM.
	#enable.manually.setting.cpu.topology.on.kvm.vm=true

	# Manually sets the host CPU MHz, in cases where CPU scaling support detects the value is wrong.
	#host.cpu.manual.speed.mhz=0

	# Defines the location for Hypervisor scripts.
	# The path defined in this property is relative.
	# To locate the script, ACS first tries to concatenate
	# the property path with "/usr/share/cloudstack-agent/lib/".
	# If it fails, it will test each folder of the path,
	# decreasing one by one, until it reaches root.
	# If the script is not found, ACS will repeat the same
	# steps concatenating the property path with "/usr/share/cloudstack-common/".
	# The path defined in this property is relative
	# to the directory "/usr/share/cloudstack-common/".
	#hypervisor.scripts.dir=scripts/vm/hypervisor

	# Defines the location for KVM scripts.
	# The path defined in this property is relative.
	# To locate the script, ACS first tries to concatenate
	# the property path with "/usr/share/cloudstack-agent/lib/".
	# If it fails, it will test each folder of the path,
	# decreasing one by one, until it reaches root.
	# If the script is not found, ACS will repeat the same
	# steps concatenating the property path with "/usr/share/cloudstack-common/".
	# The path defined in this property is relative
	# to the directory "/usr/share/cloudstack-common/".
	#kvm.scripts.dir=scripts/vm/hypervisor/kvm

	# Specifies start MAC address for private IP range.
	#private.macaddr.start=00:16:3e:77:e2:a0

	# Specifies start IP address for private IP range.
	#private.ipaddr.start=192.168.166.128

	# Defines Local Bridge Name.
	#private.bridge.name=

	# Defines private network name.
	#private.network.name=

	# Defines the location for network scripts.
	# The path defined in this property is relative.
	# To locate the script, ACS first tries to concatenate
	# the property path with "/usr/share/cloudstack-agent/lib/".
	# If it fails, it will test each folder of the path,
	# decreasing one by one, until it reaches root.
	# If the script is not found, ACS will repeat the same
	# steps concatenating the property path with "/usr/share/cloudstack-common/".
	# The path defined in this property is relative
	# to the directory "/usr/share/cloudstack-common/".
	#network.scripts.dir=scripts/vm/network/vnet

	# Defines the location for storage scripts.
	# The path defined in this property is relative.
	# To locate the script, ACS first tries to concatenate
	# the property path with "/usr/share/cloudstack-agent/lib/".
	# If it fails, it will test each folder of the path,
	# decreasing one by one, until it reaches root.
	# If the script is not found, ACS will repeat the same
	# steps concatenating the property path with "/usr/share/cloudstack-common/".
	# The path defined in this property is relative
	# to the directory "/usr/share/cloudstack-common/".
	#storage.scripts.dir=scripts/storage/qcow2

	# Time (in seconds) to wait for the VM to shutdown gracefully.
	# If the time is exceeded shutdown will be forced.
	#stop.script.timeout=120

	# Definition of VMs video model type.
	#vm.video.hardware=

	# Definition of VMs video, specifies the amount of RAM in kibibytes (blocks of 1024 bytes).
	#vm.video.ram=0

	# System VM ISO path.
	#systemvm.iso.path=

	# If set to "true", allows override of the properties: private.macaddr.start, private.ipaddr.start, private.ipaddr.end.
	#developer=false

	# Can only be used if property developer = true. This property is used to define the link local bridge name and private network name.
	#instance=

	# Shows the path to the base directory in which NFS servers are going to be mounted.
	#mount.path=/mnt

	# Port listened by the console proxy.
	#consoleproxy.httpListenPort=443

	#ping.retries=5

	# The number of iothreads. There should be only 1 or 2 IOThreads per VM CPU (default is 1). The recommended number of iothreads is 1
	# iothreads=1