Hi guys

Will be migrating some SLES11 physical hosts to vm’s in the near future and I’m wondering what is the best approach. Upgrading the OS is also required. Have considered the following options

1) migrate as is. Then upgrade to SLES12SP4 once on vm’s. Like this idea, have the safety of vm snapshots in case of upgrade issues. Can upgrade to SLES15 at a later date.

2) build new SLES15 vm’s and migrate data. Read it’s better to build new vm rather than upgrading but this brings in a lot of potential issues with OS settings like application tuning, security settings, local accounts etc as something may be missed.

These are mission critical servers so can’t afford mishaps.

All suggestions appreciated.