Manages xen unprivileged domains (domus)
Xen [start | stop | monitor | migrate_to | migrate_from | meta-data | validate-all]
Resource Agent for the Xen Hypervisor. Manages Xen virtual machine instances by mapping cluster resource start and stop, to Xen create and shutdown, respectively.
A note on names
We will try to extract the name from the config file (the xmfile attribute). If you use a simple assignment statement, then you should be fine. Otherwise, if there's some python acrobacy involved such as dynamically assigning names depending on other variables, and we will try to detect this, then please set the name attribute. You should also do that if there is any chance of a pathological situation where a config file might be missing, for example if it resides on a shared storage. If all fails, we finally fall back to the instance id to preserve backward compatibility.
Para-virtualized guests can also be migrated by enabling the meta_attribute allow-migrate.
This resource agent may be configured for native migration if available in the cluster manager. For Pacemaker, the allow-migrate="true" meta attribute enables native migration.
xmfile
Absolute path to the Xen control file, for this virtual machine.
(required, string, no default)
name
Name of the virtual machine.
(optional, string, no default)
shutdown_timeout
The Xen agent will first try an orderly shutdown using xm shutdown. Should this not succeed within this timeout, the agent will escalate to xm destroy, forcibly killing the node.
If this is not set, it will default to two-third of the stop action timeout.
Setting this value to 0 forces an immediate destroy.
(optional, string, no default)
shutdown_acpi
Handle shutdown by simulating an ACPI power button event. Enable this to allow graceful shutdown for HVM domains without installed PV drivers.
(optional, boolean, default 0)
allow_mem_management
This parameter enables dynamic adjustment of memory for start and stop actions used for Dom0 and the DomUs. The default is to not adjust memory dynamically.
(optional, boolean, default 0)
node_ip_attribute
In case of a live migration, the system will default to using the IP address associated with the hostname via DNS or /etc/hosts.
This parameter allows you to specify a node attribute that will be queried instead for the target node, overriding the IP address. This allows you to use a dedicated network for live migration traffic to a specific node.
Warning: make very sure the IP address does point to the right node. Or else the live migration will end up somewhere else, greatly confusing the cluster and causing havoc.
(optional, string, no default)
reserved_Dom0_memory
In case memory management is used, this parameter defines the minimum amount of memory to be reserved for the dom0. The default minimum memory is 512MB.
(optional, string, default "512")
monitor_scripts
To additionally monitor services within the unprivileged domain, add this parameter with a list of scripts to monitor.
(optional, string, no default)
This resource agent supports the following actions (operations):
start
Starts the resource. Suggested minimum timeout: 60.
stop
Stops the resource. Suggested minimum timeout: 40.
migrate_from
Executes steps necessary for migrating the resource away from the node. Suggested minimum timeout: 120.
migrate_to
Executes steps necessary for migrating the resource to the node. Suggested minimum timeout: 120.
monitor
Performs a detailed status check. Suggested minimum timeout: 30. Suggested interval: 10.
meta-data
Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5.
validate-all
Performs a validation of the resource configuration. Suggested minimum timeout: 5.
The following is an example configuration for a Xen resource using the crm(8) shell:
primitive p_Xen ocf:heartbeat:Xen \
params \
xmfile=string \
meta allow-migrate="true" \
op monitor depth="0" timeout="30" interval="10"
\m[blue]http://www.linux-ha.org/wiki/Xen_(resource_agent)\m[]
Linux-HA contributors (see the resource agent source for information about individual authors)