Dears,

We need help with upgrading PostgreSql v15 to v16 on z/Linux Red Hat Enterprise 
Linux 8 for IBM zSystems -AppStream.
We have tried 3 methods so far, all fail.

Server connection to external pages is prohibited, we cannot download the 
packaged directly from the web link
We were able to disable module 15 and enable module 16, it replaced only v15 
binaries, so we could not proceed with upgrade using pg_upgrade --link, because 
v15 were gone.....
Backup/ restore failed also with missing database, users, etc.

When we tried module switch (disable v15, enable v16), yum install 
postgresql-update/ postgresl-setup --upgrade, all went fine (i.e upgrading 
database OK), service 16 started,
Binaries were installed under different path, but database and users were 
missing. We have recreated the database, restore failed, users denied, and so 
on.....

yum.repos.d]# yum module list | grep postgres
postgresql           15 [e]          client, server [d]                       
PostgreSQL server and client module
postgresql           16              client, server [d]                       
PostgreSQL server and client module


 rpm -qa | grep "postgresql"
postgresql-private-libs-16.8-1.module+el8.10.0+22867+e4e13b1c.s390x
postgresql-private-devel-16.8-1.module+el8.10.0+22867+e4e13b1c.s390x
postgresql-16.8-1.module+el8.10.0+22867+e4e13b1c.s390x
postgresql-server-16.8-1.module+el8.10.0+22867+e4e13b1c.s390x



Could you advise us, what might be wrong, which package is suitable and steps 
to do the upgrade, please? Is it something wrong with packages we have, or 
module misconfiguration, or....



Regards,



Evelina Angelova

DBA Administrator

evelina.angel...@kyndryl.com



Kyndryl Client Center, s.r.o.

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