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[dnutan (Marc)]

@dnutan

Some time ago this solution was given.

Another option… Years ago we tried something similar on Gradual upgrade 7.3 to version 7.4 - #2 by dnutan. Theoretically it should work (using centos vault repos and if needed elrepo archived repos or any other third-party repos having a repo archive/vault).

@pike

Version lock was overruled serveral versions ago…

As always, if it were a working production system (despite its oldness) use a test environment first.

From that post you can grab some parts. Untested as of today (I just copy/pasted some excerpts of it but didn’t spend time reading it carefully or testing it again).
Note that there might be problems with EPEL repo (version numbering) or similar, for dependencies… Do a bit of research if needed.

@dnutan

Create a custom repository file (remember to inspect contents of downloaded file):

 curl https://gist.githubusercontent.com/dnutan/1d21e6f7e3bd8bc516a73b718a96de11/raw/52c7ebc0a937f37909c4a2a414c7490cf217cc66/Custom.repo -o /etc/yum.repos.d/Custom.repo

Set a custom yum var (used in the custom repo file to specify the desired minor version release of the distribution):

echo '7.3.1611' > /etc/yum/vars/customrelease

Clean yum repository data:

yum --enablerepo=\* clean all

optional step - Visually verify whether the repositories are correct (–nogpgcheck is used because some old nethserver repos were not gpg signed):

yum --nogpgcheck \
--disablerepo=\* \
--enablerepo=custom-C7-{base,updates,extras},\
custom-nethserver-{base,updates},\
epel,custom-centos-sclo-{sclo,rh} \
repolist -v

@dnutan

Changing yum repositories to another CentOS/NethServer distribution release:

echo '7.5.1804' > /etc/yum/vars/customrelease
yum --enablerepo=\* clean all
# optionally, repeat other previous steps to verify repos urls and available packages 

Before updating all packages, keep in mind that nextcloud doesn’t like major versions upgrades. The old nethserver wiki still has some tricks for nextcloud upgrades.

@dnutan

Update all system packages as usual (…):

yum update

@dnutan

Of course, if for some reason there were missing dependencies we should investigate and find our way through.

@dnutan

Removing custom yum var, custom repos and cleaning yum repo data. Next updates shall come from the latest available original repositories:

rm /etc/yum/vars/customrelease
rm /etc/yum.repos.d/Custom.repo
yum --enablerepo=\* clean all