forked from msvsphere/leapp-data
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
3.0 KiB
76 lines
3.0 KiB
9 months ago
|
# Migration guide
|
||
|
|
|
||
|
|
**NOTE: As this project is newly announced we HIGHLY recommend that you follow system administration best practices and make sure you have backups and/or snapshots of your system before you proceed. It is recommended to do a trial run in a sandbox to verify that migration worked as expected before you attempt to migrate any production system.**
|
||
|
|
|
||
|
|
This guide contains steps on how to upgrade CentOS 7 to RHEL8 derivatives such as AlmaLinux, CentOS, Oracle, Rocky.
|
||
|
|
|
||
|
|
To use this guide you need to install Vagrant and VirtualBox using the following
|
||
|
|
documentation:
|
||
|
|
|
||
|
|
* [Install VirtualBox](https://www.virtualbox.org/manual/ch02.html)
|
||
|
|
* [Install Vagrant](https://www.vagrantup.com/docs/installation)
|
||
|
|
|
||
|
|
* Clone this repo and cd into it
|
||
|
|
```
|
||
|
|
git clone https://github.com/AlmaLinux/leapp-data.git
|
||
|
|
cd leapp-data
|
||
|
|
```
|
||
|
|
|
||
|
|
* Start the Virtual Machine.
|
||
|
|
```
|
||
|
|
vagrant up
|
||
|
|
```
|
||
|
|
|
||
|
|
* CentOS 7.9 is required to accomplish the upgrade. Login to VM, install the latest CentOS updates, and reboot.
|
||
|
|
```
|
||
|
|
vagrant ssh
|
||
|
|
sudo yum update -y
|
||
|
|
sudo reboot
|
||
|
|
```
|
||
|
|
|
||
|
|
* After reboot login to VM again, download the leapp repo file, and install leapp.
|
||
|
|
```
|
||
|
|
vagrant ssh
|
||
|
|
sudo curl https://repo.almalinux.org/elevate/el7/elevate.repo -o /etc/yum.repos.d/elevate.repo
|
||
|
|
sudo yum install leapp -y
|
||
|
|
```
|
||
|
|
|
||
|
|
* Copy leapp config files for the OS you want to migrate. Possible options are almalinux, centos, eurolinux, msvsphere, oraclelinux, rocky.
|
||
|
|
```
|
||
|
|
sudo cp /vagrant/files/almalinux/* /etc/leapp/files/
|
||
|
|
```
|
||
|
|
|
||
|
|
* Start a preupgrade check. It will fail as the default CentOS 7 doesn't meet all requirements for migration. In the meanwhile, Leapp utility creates a special */var/log/leapp/leapp-report.txt* file that contains possible problems and recommended solutions. No rpm packages will be installed at this phase.
|
||
|
|
```
|
||
|
|
sudo leapp preupgrade
|
||
|
|
```
|
||
|
|
|
||
|
|
This summary report will help you get the picture of whether it is possible to continue the upgrade.
|
||
|
|
|
||
|
|
In certain configurations, Leapp generates */var/log/leapp/answerfile* with true/false questions. Leapp utility requires answers to all these questions in order to proceed with the upgrade.
|
||
|
|
|
||
|
|
* Mentioned fixes from the */var/log/leapp/leapp-report.txt* file are mandatory, but you can also review the rest of them if needed.
|
||
|
|
```
|
||
|
|
sudo rmmod pata_acpi
|
||
|
|
echo PermitRootLogin yes | sudo tee -a /etc/ssh/sshd_config
|
||
|
|
sudo leapp answer --section remove_pam_pkcs11_module_check.confirm=True
|
||
|
|
```
|
||
|
|
|
||
|
|
* Start an upgrade. After this process is completed you'll be offered to reboot the system.
|
||
|
|
```
|
||
|
|
sudo leapp upgrade
|
||
|
|
sudo reboot
|
||
|
|
```
|
||
|
|
|
||
|
|
* A new entry in GRUB called ELevate-Upgrade-Initramfs will appear. The system will be automatically booted into it.
|
||
|
|
See how the update process goes in the VirtualBox console.
|
||
|
|
|
||
|
|
* After reboot, login to the system and check how the migration went. Verify that the current OS is the one you need.
|
||
|
|
```
|
||
|
|
vagrant ssh
|
||
|
|
cat /etc/redhat-release
|
||
|
|
cat /etc/os-release
|
||
|
|
rpm -qa | grep centos
|
||
|
|
rpm -qa | grep el7
|
||
|
|
```
|