mvmctl
Synopsis
mvmctl -d <vmid> mvmctl -f <migrationPolicy> mvmctl -m [<options>] <vmid>
mvmctl -M dsthost=<newhost><vmid> mvmctl -q<vmid> [--blocking] [--xml]
mvmctl -w state=drained
Overview
mvmctl controls the modification, querying, migration, and destruction
of virtual machines (VMs).
Format
| -d |
| Name |
Destroy |
| Format |
<vmid>
|
| Description |
Destroys the specified VM. |
| Example |
|
| -f |
| Name |
Force Migrate |
| Format |
mvmctl -f consolidation|overcommit [--flags=eval [--xml]] |
| Description |
Forces the migration policy on the system. The eval flag causes Moab to run through migration routines and report the results without actually migrating the VMs. |
| Example |
> mvmctl -f consolidation --flags=eval
Moab returns a report like the following:
1: VM 'vm1' from 'h0' to 'h3' 2: VM 'vm2' from 'h0' to 'h5'
|
| -m |
| Name |
Modify |
| Format |
[<options>] <vmid> The <options> variable is a comma-separated list of
<attr>=<value> pairs. |
| Description |
Modifies the VM. |
| Example |
> mvmctl -m gevent=hitemp:'mymessage' myNewVM
Gevents can be set using gevent.
> mvmctl -m gmetric=bob:5.6 myNewVM
Gmetrics can be set using gmetric.
> mvmctl -m os=compute myNewVM
Reprovisioning is done by changing os.
> mvmctl -m powerstate=off myNewVM
Power management is done by modifying powerstate.
> mvmctl -m variable=user:bob+purpose:myVM myNewVM
Disallow VM migration by using cannotmigrate.
> mvmctl -m flags=cannotmigrate myNewVM
Allow a VM to migrate by setting the canmigrate flag.
> mvmctl -m flags=canmigrate myNewVM
|
| Notes |
- The variable option is a set-only operation. Previous variables will be over-written.
|
| -M |
| Name |
Migrate |
| Format |
dsthost=<newhost><vmid> |
| Description |
Migrate the given VM to the destination host.
When you set the vmid to ANY, Moab migrates the VM to any available eligible hypervisor. For this to work, the following conditions must be met:
- The VM reports a CPULOAD, and it is greater than 0.
- The VM's AMEMORY is less than its CMEMORY. This indicates that some memory is currently in use and tells Moab that the RM is reporting memory correctly.
- The VM's state is not "Unknown."
- All hypervisors report a CPULOAD, and it is greater than 0.
- All hypervisors report an AMEMORY, and it is less than its CMEMORY.
- All hypervisors report a hypervisor type.
|
| Example |
> mvmctl -M dsthost=node05 myNewVM
myNewVM migrates to node05.
> mvmctl -M dsthost=ANY vm42
Moab migrates vm42 to a node based on policy destination limitations (such as the NoVMMigrations flag).
|
| -q |
| Name |
Query |
| Format |
<vmid> [--blocking] [--xml] |
| Description |
Queries the specified VM; that is, it returns detailed
information about the given VM. May be used with or without the --xml flag. ALL
may also be used to display information about all VMs. This option gathers information from the Moab cache which prevents it from waiting for the scheduler, but the --blocking option can be used to bypass the cache and allow waiting for the scheduler. |
| Example |
> mvmctl -q ALL --blocking
|
| -w |
| Name |
Constraint |
| Format |
state=drained |
| Description |
Overrides the HIDEDRAINED DISPLAYFLAGS attribute allowing display of VMs in a DRAINED state. |
| Example |
> mvmctl -q -w state=drained
|