Configuring the suspend
Resource Type
Suspend and resume are supported for a kernel zone only if a kernel zone has a suspend
resource in its configuration. You must add a suspend
resource and set its path
or storage
property before you can suspend the kernel zone.
Suspend and resume is necessary for warm migration. If you want to
perform a warm migration, the suspend
resource must
use a shared storage location that is accessible to the source host and
the target host. The storage device for the suspended image must be
large enough to accommodate the amount of memory allocated to the kernel
zone in its capped-memory:physical
property.
Other uses for suspend and resume include enabling the ability to pause a zone instead of shutting it down when system maintenance is needed. Suspend and resume can enable the kernel zone and its running applications to be ready for use more quickly.
You can also set the autoshutdown=suspend
global property to enable a kernel zone to be suspended automatically instead of shut down when the global zone is shut down. For more information, see autoshutdown Global Property in Oracle Solaris Zones Configuration Resources.
Note:
If a kernel zone is using SR-IOV, the ability to suspend and warm or live migrate the kernel zone is limited to host systems and zones running Oracle Solaris 11.4. See About Migration of Kernel Zones with SR-IOV-Enabled anet Resources for more information.For a more extensive example and background, see Migratory Solaris Kernel Zones.
Example 2-13 Configuring a suspend
Resource to Enable Pausing a Kernel Zone
This example shows how to set a suspend
resource to use a local path to enable suspend and resume so you can
pause the kernel zone on the host.
global$ pfbash zonecfg -z kz1 zonecfg:kz1> add suspend zonecfg:kz1:suspend> set path=/system/zones/kz1/suspend zonecfg:kz1:suspend> end zonecfg:kz1> info suspend suspend: path: /system/zones/kz1/suspend
The zone can be suspended with the following command and later
resumed with a zoneadm boot
command.
global$ zoneadm -z kz1 suspend
Example 2-14 Configure the suspend
Resource to Enable Warm
Migration
This example shows how to reset a suspend
resource to use a storage URI for a iSCSI device.
global$ pfbash zonecfg -z kz1 zonecfg:kz1> select suspend zonecfg:kz1:suspend> clear path zonecfg:kz1:suspend> set storage=iscsi://system/luname.naa.501337600144f0dbf8af1900 zonecfg:kz1:suspend> end ; exit
See Using Warm Migration to Migrate a Kernel Zone for more information.
See the solaris-kz
(7) man page for more information about suspend
resource type requirements.