RHEL OS upgrade from 6.7 (Current version) to 8 version for Postgresql database

From: ram pratap maurya <rampratap0000(at)gmail(dot)com>
To: paul(dot)foerster(at)gmail(dot)com, pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: RHEL OS upgrade from 6.7 (Current version) to 8 version for Postgresql database
Date: 2021-03-19 07:12:28
Message-ID: CAAiDzSfzh2Ms-GYqbHfPcWGdfGEJT8ObQQp+rvYPS7+82HB+uw@mail.gmail.com
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Dear Team,

we are planing to RHEL OS upgrade from 6.7 (Current version) to 8 version.

currently postgresql-12.6 version running on the server , we have upgraded
OS on test DB server from 6 to 8 version during OS upgrade
postgresql-12,11 and other package is removed and Postgresql is not
started. that why my DB is crashed , can you please suggest what is best
way to upgrade OS.

And also confirm postgresql-13 support RHEL 6 version because during
installation its showing postgresql13-server not found.

.....................................

# rpm iav | grep 'el6'

atop-1.27-2.el6.x86_64 Fri Jul 13
12:35:22 2018

bakefile-0.2.8-3.el6.centos.x86_64 Fri May 20
15:40:05 2016

glances-1.7.4-1.el6.noarch Fri Jul 13
12:44:57 2018

htop-1.0.3-1.el6.x86_64 Fri Jul 13
12:34:03 2018

iftop-1.0-0.14.pre4.el6.x86_64 Fri Jul 13
12:40:07 2018

nethogs-0.8.5-1.el6.x86_64 Fri Jul 13
12:36:37 2018

nmon-16g-3.el6.x86_64 Fri Jul 13
12:43:13 2018

postgresql11-11.11-2PGDG.rhel6.x86_64 Thu Mar 11
19:17:57 2021

postgresql11-contrib-11.11-2PGDG.rhel6.x86_64 Thu Mar 11
19:18:30 2021

postgresql11-libs-11.11-2PGDG.rhel6.x86_64 Thu Mar 11
19:17:27 2021

postgresql11-server-11.11-2PGDG.rhel6.x86_64 Thu Mar 11
19:17:58 2021

postgresql12-12.6-2PGDG.rhel6.x86_64 Thu Mar 11
19:17:56 2021

postgresql12-contrib-12.6-2PGDG.rhel6.x86_64 Thu Mar 11
19:18:30 2021

postgresql12-libs-12.6-2PGDG.rhel6.x86_64 Thu Mar 11
19:17:26 2021

postgresql12-server-12.6-2PGDG.rhel6.x86_64 Thu Mar 11
19:18:00 2021

postgresql94-9.4.8-1PGDG.rhel6.x86_64 Mon May 23
23:14:42 2016

postgresql94-contrib-9.4.8-1PGDG.rhel6.x86_64 Mon May 23
23:14:42 2016

postgresql94-devel-9.4.8-1PGDG.rhel6.x86_64 Tue May 24
01:06:53 2016

postgresql94-libs-9.4.8-1PGDG.rhel6.x86_64 Mon May 23
23:14:41 2016

postgresql94-server-9.4.8-1PGDG.rhel6.x86_64 Mon May 23
23:14:43 2016

postgresql96-9.6.21-1PGDG.rhel6.x86_64 Thu Mar 11
19:17:55 2021

postgresql96-contrib-9.6.21-1PGDG.rhel6.x86_64 Thu Mar 11
19:18:29 2021

postgresql96-devel-9.6.21-1PGDG.rhel6.x86_64 Thu Mar 11
19:18:31 2021

postgresql96-docs-9.6.21-1PGDG.rhel6.x86_64 Thu Mar 11
19:19:24 2021

postgresql96-libs-9.6.21-1PGDG.rhel6.x86_64 Thu Mar 11
19:17:26 2021

postgresql96-server-9.6.21-1PGDG.rhel6.x86_64 Thu Mar 11
19:18:01 2021

python-empy-3.3-5.el6.centos.noarch Fri May 20
15:40:05 2016

python-psutil-0.6.1-1.el6.x86_64 Fri Jul 13
12:44:56 2018

ql2400-firmware-7.03.00-1.el6_5.noarch Tue May 10
18:39:39 2016

ql2500-firmware-7.03.00-1.el6_5.noarch Tue May 10
18:39:39 2016

wxBase-2.8.12-1.el6.centos.x86_64 Fri May 20
15:39:57 2016

wxGTK-2.8.12-1.el6.centos.x86_64 Fri May 20
15:39:58 2016

wxGTK-devel-2.8.12-1.el6.centos.x86_64 Fri May 20
15:40:06 2016

wxGTK-gl-2.8.12-1.el6.centos.x86_64 Fri May 20
15:39:59 2016

wxGTK-media-2.8.12-1.el6.centos.x86_64 Fri May 20
15:39:59 2016

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