RHEL8 - Migration/Upgrade

 RHEL8 Rollout plan
RedHat already released RHEL8 and we have to plan to migrade to latest version of RHEL8.

 Task to perform,

- Make a list of application that are not compabible with RHEL7 and do conpatible with RHEL8.

- Review the systems that are good candidate for migration.

- Look for compatibility list to make sure they are supported.

Here is a list of application running currently

Funtion            Migrate (Yes/No)
--------        ----------------
Database(oracle)    Yes
Database(MariaFB)    Yes
Nessus            Yes
Nagios            Yes
Solarwind        Yes
loadbalancer        Yes
logserver        yes but need to discuss within team.
Repos-HUB        Yes
---- add more list here.

Planning and execution

PhaseI: Preparation
- Prepare a list of servers
- Install RHEL 8 and start testing
- Create repo
- Build a gold image to install on rest of the servers

PhaseII:- Building new servers
- Start building new machins using gold image.

- Start using in-place upgrade as well.

PhaseIII: System Hardening
- Security is the key issuse of concern in the orgazition. 

PhaseIV: Rollout
- Once your systems are near perfect, test, validate and ger approve for final rollout.