Migrating an lx Branded Zone to a Different Machine

You can do a trial run of a zone migration before you actually move the zone to a different machine. For more information, see About Validating a Zone Migration Before the Migration Is Performed.

Note that the trial run does not validate the processor type, so you must verify that the target machine is running a supported processor.

About Migrating an lx Branded Zone

The zonecfg and zoneadm commands can be used to migrate an existing non-global zone from one system to another. The zone is halted and detached from its current host. The zonepath is moved to the target host, where it is attached.

The following requirements apply to lx branded zone migration:

• The global zone on the target system must be running the same Solaris release as the original host.

• To ensure that the zone will run properly, the target system must have the same versions of the required operating system packages and patches that were installed on the original host.

• The brand must be the same on the original host and on the target system.

• The target system must have one of the following supported i686 processor types:

  • Intel

    • Pentium Pro

    • Pentium II

    • Pentium III

    • Celeron

    • Xeon

    • Pentium 4

    • Pentium M

    • Pentium D

    • Pentium Extreme Edition

    • Core

    • Core 2

    AMD

    • Opteron

    • Athlon XP

    • Athlon 64

    • Athlon 64 X2

    • Athlon FX

    • Duron

    • Sempron

    • Turion 64

    • Turion 64 X2

The zoneadm detach process creates the information necessary to attach the zone on a different system. The zoneadm attach process verifies that the target machine has the correct configuration to host the zone. Because there are several ways to make the zonepath available on the new host, the actual movement of the zonepath from one system to another is a manual process that is performed by the global administrator.

When attached to the new system, the zone is in the installed state.

How to Migrate an lx Branded Zone

1. Become superuser, or assume the Primary Administrator role.

   To create the role and assign the role to a user, see Using the Solaris Management Tools With RBAC (Task Map) in System Administration Guide: Basic Administration.

2. Halt the zone to be migrated, lx-zone in this procedure.

   host1# zoneadm -z lx-zone halt

3. Detach the zone.

   host1# zoneadm -z lx-zone detach

   The detached zone is now in the configured state.

4. Move the zonepath for lx-zone to the new host.

   See How to Move the zonepath to a new Host for more information.

5. On the new host, configure the zone.

   host2# zonecfg -z lx-zone

   You will see the following system message:

   lx-zone: No such zone configured
   Use 'create' to begin configuring a new zone.

6. To create the zone lx-zone on the new host, use the zonecfg command with the -a option and the zonepath on the new host.

   zonecfg:lx-zone> create -a /export/zones/lx-zone

7. View the configuration.

   zonecfg:lx-zone> info
   zonename: lx-zone
   zonepath: /export/zones/lx-zone
   brand: lx
   autoboot: false
   bootargs:
   pool:
   limitpriv:
   net:
            address: 192.168.0.90
            physical: bge0

8. (Optional) Make any required adjustments to the configuration.

   For example, the network physical device might be different on the new host, or devices that are part of the configuration might have different names on the new host.

   zonecfg:lx-zone> select net physical=bge0
   zonecfg:lx-zone:net> set physical=e1000g0
   zonecfg:lx-zone:net> end

9. Commit the configuration and exit.

   zonecfg:lx-zone> commit
   zonecfg:lx-zone> exit

10. Attach the zone on the new host.
    • Attach the zone with a validation check.

      host2# zoneadm -z lx-zone attach

      The system administrator is notified of required actions to be taken if either or both of the following conditions are present:

      • Required packages and patches are not present on the new machine.

      • The software levels are different between machines.

    • Force the attach operation without performing the validation.

      host2# zoneadm -z lx-zone attach -F

      ---

      Caution - The -F option allows you to force the attach with no validation performed. This is useful in certain cases, such as in a clustered environment or for backup and restore operations, but it does require that the system be properly configured to host the zone. An incorrect configuration could result in undefined behavior later.

      ---

How to Move the zonepath to a new Host

There are many ways to create an archive of the zonepath. For example, you can use the cpio or pax commands described in the cpio(1)) and pax(1) man pages.

There are also several ways to transfer the archive to the new host. The mechanism used to transfer the zonepath from the source host to the destination depends on the local configuration. In some cases, such as a SAN, the zonepath data might not actually move. The SAN might simply be reconfigured so the zonepath is visible on the new host. In other cases, the zonepath might be written to tape, and the tape mailed to a new site.

For these reasons, this step is not automated. The system administrator must choose the most appropriate technique to move the zonepath to the new host.

1. Become superuser, or assume the Primary Administrator role.

   To create the role and assign the role to a user, see Using the Solaris Management Tools With RBAC (Task Map) in System Administration Guide: Basic Administration.

2. Move the zonepath to the new host. You can use the method described in this procedure, or use another method of your choice.

Example 35-1 Archiving and Moving the zonepath Using the tar Command

1. Create a tar file of the zonepath on host1 and transfer it to host2 by using the sftp command.

   host1# cd /export/zones
   host1# tar cf lx-zone.tar lx-zone
   host1# sftp host2
   Connecting to host2...
   Password:
   sftp> cd /export/zones
   sftp> put lx-zone.tar
   Uploading lx-zone.tar to /export/zones/lx-zone.tar
   sftp> quit

2. On host2, unpack the tar file.

   host2# cd /export/zones
   host2# tar xf lx-zone.tar

For more information, see sftp(1) and tar(1).

Troubleshooting

See Resolving Problems With a zoneadm attach Operation for troubleshooting information on the following:

• Patches and packages are out of sync.

• Operating system releases do not match.

The user must verify that the processor type in the new machine is supported. See About Migrating an lx Branded Zone for more information.

About Validating an lx Branded Zone Migration Before the Migration Is Performed

You can perform a trial run before the zone is moved to the new machine by using the “no execute” option, -n.

The zoneadm detach subcommand is used with the -n option to generate a manifest on a running zone without actually detaching the zone. The state of the zone on the originating system is not changed. The zone manifest is sent to stdout. The global administrator can direct this output to a file or pipe it to a remote command to be immediately validated on the target host. The zoneadm attach subcommand is used with the -n option to read this manifest and verify that the target machine has the correct configuration to host the zone without actually doing an attach.

The zone on the target system does not have to be configured on the new host before doing a trial-run attach.

How to Validate an lx Branded Zone Migration Before the Migration Is Performed

You must be the global administrator in the global zone to perform this procedure.

1. Become superuser, or assume the Primary Administrator role.

   To create the role and assign the role to a user, see Using the Solaris Management Tools With RBAC (Task Map) in System Administration Guide: Basic Administration.

2. Use one of the following methods.
   • Generate the manifest on a source host named lx-zone and pipe the output to a remote command that will immediately validate the target host:

     global# zoneadm -z lx-zone detach -n | ssh remotehost zoneadm attach -n -

     The hyphen (—) at the end of the line specifies stdin for the path.

   • Generate the manifest on a source host named lx-zone and direct the output to a file:

     global# zoneadm -z lx-zone detach -n 

     Copy the manifest to the new host system as described in How to Move the zonepath to a new Host, and perform the validation:

     global# zoneadm attach -n path_to_manifest

     The path can be — to specify stdin.