Planning the HA for Logical Domains Installation and Configuration

This section contains the information you need to plan your HA for Logical Domains installation and configuration.

Configuration Restrictions

The configuration restrictions in the subsections that follow apply only to HA for Logical Domains.

For restrictions that apply to all data services, see the Oracle Solaris Cluster 3.3 Release Notes.

Caution - Your data service configuration might not be supported if you do not observe these restrictions.

Restriction for the HA for Logical Domains configuration

Logical Domains can be configured only as a failover data service and not as a scalable data service.
Restriction for using warm migration with HA for Logical Domains data service

Do not configure the HA for Logical Domains data service with Logical Domains version 1.2 or earlier if you want to use the Logical Domains warm migration feature.
Restriction for the location of HA for Logical Domains virtual disks

Logical Domains disk image file should be placed only in the global file system. The file is exported as a raw disk by the virtual disk server and can be used as an installation disk by the Solaris OS installer on the guest domain.

The following example shows Logical Domains guest domains installed onto a global file system with two guest domain instances (ldg0 and ldg1).
```
# ls -l /global/ldoms/disks/
total 26926720
-rw------T 1 root root 8589934592 Aug 23 03:31 ldg0.vdisk
-rw------T 1 root root 8589934592 Aug 21 02:43 ldg1.vdisk
```
Note - In the example, the virtual disk for theLogical Domains guest domain instance ldg0 is /global/ldoms/disks/ldg0.vdisk, whereas the virtual disk for Logical Domains guest domain instance ldg1 is /global/ldoms/disks/ldg1.vdisk.
Restriction for Logical Domains Software Configurations

None

How to Configure Logical Domains to Reset for Control Domain Failures

On each node that can master the Logical Domains guest domain resource, run the following commands.

# ldm set-domain failure-policy=reset primary
 
# ldm list -o domain primary
NAME             STATE      FLAGS   UTIL
primary          active       -n-cv-      0.6%
 
SOFTSTATE
Solaris running
 
HOSTID
    0x84d4a2ce
 
CONTROL
    failure-policy=reset
 
DEPENDENCY
    master=
 
# ldm set-domain master=primary ldg0

# ldm list -o domain ldg0
NAME             STATE      FLAGS   UTIL
ldg0             active     {}{}{}{}{}{}{}{}n---  0.1%
 
SOFTSTATE
Solaris running
 
HOSTID
    0x84f8a040
 
CONTROL
    failure-policy=ignore
 
DEPENDENCY
    master=
 
VARIABLES
    auto-boot?=false
    auto-boot?true=
    boot-device=vdisk1
    keyboard-layout=US-English

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