Live/in-place/online upgrade to CentOS 8.
CentOS no longer provides a supported path for upgrading CentOS-7 systems to CentOS-8 (Stream).
So here is a HIGHLY EXPERIMENTAL and HIGHLY DANGEROUS script for doing an in-place/online upgrade to 8.
Most of the testing has been done on 7-Server. For desktops, YMMV.
Backups are your friend, it is entirely possible you will be left with a non-functioning and irrepairable system after this process finishes.
$ curl https://raw.githubusercontent.com/johnj/centos-to8-upgrade/master/to8.sh | sudo bash- CentOS-7
- 2GB of available disk space on the $STAGING_DIR location (default /to8).
This process will attempt to backup all changed files into $STAGING_DIR/to8_backup_timestamp (default /to8/to8_backup_%Y_%m_%d).
| EnvVar | Default Value | Description |
|---|---|---|
| STAGING_DIR | /to8 | set this to use an alternative staging directory |
| CONFIG_DIRS | /etc | possible configuration directories, usually /etc is sufficient. For multiple directories set to something like "/{etc,/usr/share}" |
| NONINTERACTIVE | false | set this to a non-empty value to suppress interactive prompts (currently the only prompt is to temporarily set SELinux enforcement to "Permissive") |
This process installs CentOS-8. After this process is finished, if you would like to move to CentOS-8-Stream, simply run:
$ sudo yum install --enablerepo="extras" centos-release-stream