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Implements a VM volume/disk file activity checker that checks if QCOW2 file has been changed before starting the VM. This is useful as a pessimistic approach to save VMs that were running on faulty hosts that CloudStack could try to launch on other hosts while the host was not cleanly fenced. This is optional and available only if you enable the settings in agent.properties file, on per-host basis. Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
155 lines
6.4 KiB
Properties
155 lines
6.4 KiB
Properties
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# Sample configuration file for CloudStack agent
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# The GUID to identify the agent with, this is mandatory!
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# Generate with "uuidgen"
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guid=
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#resource= the java class, which agent load to execute
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resource=com.cloud.hypervisor.kvm.resource.LibvirtComputingResource
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#workers= number of threads running in agent
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workers=5
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#host= The IP address of management server
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host=localhost
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#port = The port management server listening on, default is 8250
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port=8250
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#cluster= The cluster which the agent belongs to
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cluster=default
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#pod= The pod which the agent belongs to
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pod=default
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#zone= The zone which the agent belongs to
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zone=default
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#public.network.device= the public nic device
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# if this is commented, it is autodetected on service startup
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# public.network.device=cloudbr0
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#private.network.device= the private nic device
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# if this is commented, it is autodetected on service startup
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# private.network.device=cloudbr1
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#guest.network.device= the guest nic device
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# if this is commented, the private nic device will be used
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# local storage path, by default, it's /var/lib/libvirt/images/
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#local.storage.path=/var/lib/libvirt/images/
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# The UUID for the local storage pool, this is mandatory!
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# Generate with "uuidgen"
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local.storage.uuid=
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# Location for KVM scripts
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domr.scripts.dir=scripts/network/domr/kvm
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# the timeout for time-consuming operations, such as create/copy snapshot
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#cmds.timeout=7200
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# set the vm migrate speed, by default, it will try to guess the speed of the guest network
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# In MegaBytes per second
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#vm.migrate.speed=0
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# set target downtime at end of livemigration, the 'hiccup' for final copy. Higher numbers
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# make livemigration easier, lower numbers may cause migration to never complete. Less than 1
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# means hypervisor default (20ms).
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#vm.migrate.downtime=0
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# Busy VMs may never finish migrating, depending on environment. When its available, we will
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# want to add support for autoconvergence migration flag which should fix this. Set an upper
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# limit in milliseconds for how long live migration should wait, at which point VM is paused and
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# migration will finish quickly. Less than 1 means disabled.
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#vm.migrate.pauseafter=0
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# set the type of bridge used on the hypervisor, this defines what commands the resource
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# will use to setup networking. Currently supported NATIVE, OPENVSWITCH
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#network.bridge.type=native
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# set the driver used to plug and unplug nics from the bridges
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# a sensible default will be selected based on the network.bridge.type but can
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# be overridden here.
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# native = com.cloud.hypervisor.kvm.resource.BridgeVifDriver
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# openvswitch = com.cloud.hypervisor.kvm.resource.OvsVifDriver
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#libvirt.vif.driver=com.cloud.hypervisor.kvm.resource.BridgeVifDriver
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# set the hypervisor type, values are: kvm, lxc
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hypervisor.type=kvm
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# set the hypervisor URI. Usually there is no need for changing this
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# For KVM: qemu:///system
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# For LXC: lxc:///
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# hypervisor.uri=qemu:///system
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# settings to enable direct networking in libvirt, should not be used
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# on hosts that run system vms, values for mode are: private, bridge, vepa
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# libvirt.vif.driver=com.cloud.hypervisor.kvm.resource.DirectVifDriver
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# network.direct.source.mode=private
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# network.direct.device=eth0
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# setting to enable the cpu model to kvm guest globally.
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# three option:custom,host-model and host-passthrough.
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# custom - user custom the CPU model which specified by guest.cpu.model.
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# host-model - identify the named CPU model which most closely matches the host,
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# and then request additional CPU flags to complete the match. This should give
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# close to maximum functionality/performance, which maintaining good
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# reliability/compatibility if the guest is migrated to another host with slightly different host CPUs.
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# host-passthrough - tell KVM to passthrough the host CPU with no modifications.
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# The difference to host-model, instead of just matching feature flags,
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# every last detail of the host CPU is matched. This gives absolutely best performance,
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# and can be important to some apps which check low level CPU details,
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# but it comes at a cost wrt migration. The guest can only be migrated to
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# an exactly matching host CPU.
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#
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# guest.cpu.mode=custom|host-model|host-passthrough
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# This param is only valid if guest.cpu.mode=custom,
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# for examples:"Conroe" "Penryn", "Nehalem", "Westmere", "pentiumpro" and so
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# on,run virsh capabilities for more details.
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# guest.cpu.model=
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#
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# This param will require CPU features on the <cpu> section
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# guest.cpu.features=vmx vme
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#
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# vm.memballoon.disable=true
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# Disable memory ballooning on vm guests for overcommit, by default overcommit
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# feature enables balloon and sets currentMemory to a minimum value.
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#
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# vm.diskactivity.checkenabled=false
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# Set to true to check disk activity on VM's disks before starting a VM. This only applies
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# to QCOW2 files, and ensures that there is no other running instance accessing
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# the file before starting. It works by checking the modify time against the current time,
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# so care must be taken to ensure the cluster has time synced, otherwise VMs may fail to start.
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#
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# vm.diskactivity.checktimeout_s=120
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# Timeout for giving up on waiting for VM's disk files to become inactive. Hitting
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# this timeout will result in failure to start VM.
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#
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# vm.diskactivity.inactivetime_ms=30000
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# This is the length of time that the disk needs to be inactive in order to pass the check.
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# This means current time minus mtime of disk file needs to be greater than this number.
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# It also has the side effect of setting the minimum threshold between a stop and start of
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# a given VM.
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#
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# kvmclock.disable=false
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# Some newer linux kernels are incapable of reliably migrating vms with kvmclock
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# This is a workaround for the bug, admin can set this to true per-host
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