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Added offline and do-not-pre-update options

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Giuseppe Ragusa 2022-06-03 09:02:18 +02:00 committed by GitHub
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migrate2rocky/README.md
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@ -7,7 +7,9 @@ Running this script will convert an existing CentOS 8 system to Rocky Linux 8.
```bash
./migrate2rocky.sh -h
├── -d # --> Do not update before conversion
├── -h # --> Display this help
├── -o # --> Work in offline mode
├── -r # --> Convert to Rocky
└── -V # --> Verify switch
@ -17,8 +19,9 @@ Running this script will convert an existing CentOS 8 system to Rocky Linux 8.
### Disk Space Requirements
Please note the following disk space requirements. These requirements may vary
from one system to another. Failure to have adequate disk space available may
result in migrate2rocky leaving the system in an unstable state:
from one system to another. Offline mode may require further space for rpm
packages and repository metadata. Failure to have adequate disk space available
may result in migrate2rocky leaving the system in an unstable state:
```
/usr 250M
@ -58,11 +61,27 @@ sed -i -r \
/etc/yum.repos.d/CentOS-*.repo
```
#### Migration in offline mode
Offline mode has received minimal testing and only in the CentOS 8.5 -> Rocky 8.5
migration from a pristine system using a mounted CentOS 8.5 DVD ISO and a Rocky 8.5
ISO as offline repositories, mounted respectively under /mnt/centos and /mnt/rocky
(these pathnames are hardcoded into the script).
#### Migration with updating disabled
Disabling running system update before migration has been introduced as a
convenience option for the offline conversion mode but it should be carefully
tested on a non-production system before attempting it even in offline mode.
#### Custom replacements of default repositories
This script expects the **original repository configuration being present, as
well as enabled** (i.e. for CentOS the `baseos` repo configuration in the
`/etc/yum.repos.d/CentOS-Linux-BaseOS.repo` file has to be present and enabled).
Offline mode will require at least the repository metadata for the `baseos` and
`appstream` repos to be available (for CentOS under /mnt/centos/{BaseOS,AppStream}
which can be copied or mounted from a CentOS ISO).
Also make sure that there are **no other repositories** which could interfere
with the original configuration.