InfoScale™ 9.0 Virtualization Guide - AIX

VCS initiated LPAR migration

• To migrate a managed LPAR:

  # hagrp -migrate <lpar_service_group> \
  -to <target_vcs_node>

LPAR migration outside of VCS control

• VCS can detect LPAR migration initiated outside of VCS. During this period, you may see notifications if the migrating node is unable to heartbeat with its peers within LLT's default peer inactive timeout. You can reset the default LLT peerinact timeout value to enable the migrating node to heartbeat with its peers within LLT's default peer inactive timeout. For the example procedure below, the sample value is set to 90 seconds.

To avoid false failovers for LPAR migration outside of VCS control

1. Determine how long the migrating node is unresponsive in your environment.
2. If that time is less than the default LLT peer inactive timeout of 16 seconds, VCS operates normally.

   If not, increase the peer inactive timeout to an appropriate value on all the nodes in the cluster before beginning the migration.

   For example, to set the LLT peerinact timeout to 90 seconds, use the following command:

   # lltconfig -T peerinact:9000

   The value of the peerinact command is in .01 seconds.

3. Verify that peerinact has been set to 90 seconds:

   # lltconfig -T query

   Current LLT timer values (.01 sec units):
    heartbeat   = 50
    heartbeatlo = 100
    peertrouble = 200
    peerinact   = 9000
    oos         = 10
    retrans     = 10
    service     = 100
    arp         = 30000
    arpreq         = 3000
    Current LLT flow control values (in packets):
    lowwater  = 40

4. Repeat steps 1 to 3 on other cluster nodes.
5. Reset the value back to the default after the migration is complete.

To make LLT peerinact value persistent across reboots:

• Append the following line at the end of /etc/llttab file:

  set-timer peerinact:9000

  After appending the above line, /etc/llttab file should appear similar to the following:

  # cat /etc/llttab
  set-node host1
  set-cluster 1234
  link en2 en-00:15:17:48:b5:80 - ether - -
  link en3 en-00:15:17:48:b5:81 - ether - -
  set-timer peerinact:9000

To migrate the managed LPAR without ProfileFile support

1. From the source managed system, back up the LPAR profile. After migration completes, the LPAR and its profiles are automatically deleted from the source.

   For VCS to manage the LPAR, the profile is required on the managed physical system of the management VCS that is part of the system list of the LPAR resource.

2. On the destination system, rename the LPAR profile that was created during initial configuration of LPAR as a resource on all systems. LPM validation fails if it finds the profile with same LPAR name on the destination managed physical system
3. Migrate the managed LPAR.
4. Perform one of the following:

   • If migration succeeds, the profile on source is removed. Restore and rename the LPAR profile from the backup that was taken in step 1. Remove the renamed LPAR profile on the destination.

   • If migration fails, remove the backup profile on the source. On the destination, rename the renamed LPAR profile to original LPAR profile.