cat /etc/centos-release
CentOS Linux release 8.3.2011
yum update返回错误如下所示，与 postgresql 12 安装有些冲突。
遵循本指南：在 Centos8 上安装 psql 12我安装了 postgres 12。
作为根用户：
dnf module list postgresql
dnf module enable postgresql:12
dnf install postgresql-server
postgresql-setup --initdb
systemctl start postgresql
systemctl enable postgresql
那是不久前的事，现在当我尝试yum update或dnf update我得到：
Error:
Problem 1: cannot install the best update candidate for package libpq-devel-12.4-1.el8_2.x86_64
- package postgresql13-devel-13.1-1PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.1-1PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.5-1PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.5-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.10-1PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.10-1PGDG.rhel8, but none of the providers can be installed
- package postgresql10-devel-10.15-1PGDG.rhel8.x86_64 requires postgresql10(x86-64) = 10.15-1PGDG.rhel8, but none of the providers can be installed
- package postgresql13-13.1-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.5-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.10-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql10-10.15-1PGDG.rhel8.x86_64 is filtered out by modular filtering
Problem 2: problem with installed package libpq-devel-12.4-1.el8_2.x86_64
- package libpq-devel-12.4-1.el8_2.x86_64 requires libpq(x86-64) = 12.4-1.el8_2, but none of the providers can be installed
- package libpq5-13.0-10PGDG.rhel8.x86_64 obsoletes libpq provided by libpq-12.4-1.el8_2.x86_64
- package postgresql13-devel-13.0-1PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.0-1PGDG.rhel8, but none of the providers can be installed
- package postgresql13-devel-13.0-2PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.0-2PGDG.rhel8, but none of the providers can be installed
- package postgresql13-devel-13.1-1PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.1-1PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.3-4PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.3-4PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.3-5PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.3-5PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.4-1PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.4-1PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.4-4PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.4-4PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.5-1PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.5-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.10-1PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.10-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.8-2PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.8-2PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.9-1PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.9-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.9-4PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.9-4PGDG.rhel8, but none of the providers can be installed
- package postgresql10-devel-10.15-1PGDG.rhel8.x86_64 requires postgresql10(x86-64) = 10.15-1PGDG.rhel8, but none of the providers can be installed
- cannot install the best update candidate for package libpq-12.4-1.el8_2.x86_64
- package postgresql13-13.0-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql13-13.0-2PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql13-13.1-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.3-4PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.3-5PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.4-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.4-4PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.5-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.10-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.8-2PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.9-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.9-4PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql10-10.15-1PGDG.rhel8.x86_64 is filtered out by modular filtering
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)
尝试过
dnf clean all
dnf --best update
但没有解决，有什么想法吗？
一些输出：
dnf module list postgresql输出：
Last metadata expiration check: 0:00:36 ago on Tue 08 Dec 2020 18:22:50 IST.
CentOS Linux 8 - AppStream
Name Stream Profiles Summary
postgresql 9.6 client, server [d] PostgreSQL server and client module
postgresql 10 [d] client, server [d] PostgreSQL server and client module
postgresql 12 [e] client, server [d] PostgreSQL server and client module
Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
yum list --installed | grep postg
Modular dependency problems:
Problem 1: conflicting requests
- nothing provides module(perl:5.26) needed by module perl-DBI:1.641:8010020191113222731:16b3ab4d-0.x86_64
Problem 2: conflicting requests
- nothing provides module(perl:5.26) needed by module perl-IO-Socket-SSL:2.066:8030020200715230104:1e4bbb35-0.x86_64
Problem 3: conflicting requests
- nothing provides module(perl:5.26) needed by module perl-libwww-perl:6.34:8030020200716155257:b967a9a2-0.x86_64
postgresql.x86_64 12.1-2.module_el8.1.0+273+979c16e6 @AppStream
postgresql-contrib.x86_64 12.1-2.module_el8.1.0+273+979c16e6 @AppStream
postgresql-server.x86_64 12.1-2.module_el8.1.0+273+979c16e6 @AppStream
dnf update --nobest
Last metadata expiration check: 0:06:45 ago on Tue 08 Dec 2020 18:22:50 IST.
Dependencies resolved.
Problem 1: cannot install the best update candidate for package libpq-devel-12.4-1.el8_2.x86_64
- package postgresql13-devel-13.1-1PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.1-1PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.5-1PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.5-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.10-1PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.10-1PGDG.rhel8, but none of the providers can be installed
- package postgresql10-devel-10.15-1PGDG.rhel8.x86_64 requires postgresql10(x86-64) = 10.15-1PGDG.rhel8, but none of the providers can be installed
- package postgresql13-13.1-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.5-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.10-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql10-10.15-1PGDG.rhel8.x86_64 is filtered out by modular filtering
Problem 2: problem with installed package libpq-devel-12.4-1.el8_2.x86_64
- package libpq-devel-12.4-1.el8_2.x86_64 requires libpq(x86-64) = 12.4-1.el8_2, but none of the providers can be installed
- package libpq5-13.0-10PGDG.rhel8.x86_64 obsoletes libpq provided by libpq-12.4-1.el8_2.x86_64
- package postgresql13-devel-13.0-1PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.0-1PGDG.rhel8, but none of the providers can be installed
- package postgresql13-devel-13.0-2PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.0-2PGDG.rhel8, but none of the providers can be installed
- package postgresql13-devel-13.1-1PGDG.rhel8.x86_64 requires postgresql13(x86-64) = 13.1-1PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.3-4PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.3-4PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.3-5PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.3-5PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.4-1PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.4-1PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.4-4PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.4-4PGDG.rhel8, but none of the providers can be installed
- package postgresql12-devel-12.5-1PGDG.rhel8.x86_64 requires postgresql12(x86-64) = 12.5-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.10-1PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.10-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.8-2PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.8-2PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.9-1PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.9-1PGDG.rhel8, but none of the providers can be installed
- package postgresql11-devel-11.9-4PGDG.rhel8.x86_64 requires postgresql11(x86-64) = 11.9-4PGDG.rhel8, but none of the providers can be installed
- package postgresql10-devel-10.15-1PGDG.rhel8.x86_64 requires postgresql10(x86-64) = 10.15-1PGDG.rhel8, but none of the providers can be installed
- cannot install the best update candidate for package libpq-12.4-1.el8_2.x86_64
- package postgresql13-13.0-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql13-13.0-2PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql13-13.1-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.3-4PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.3-5PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.4-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.4-4PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql12-12.5-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.10-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.8-2PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.9-1PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql11-11.9-4PGDG.rhel8.x86_64 is filtered out by modular filtering
- package postgresql10-10.15-1PGDG.rhel8.x86_64 is filtered out by modular filtering
==========================================================================================================================================================
Package Architecture Version Repository Size
==========================================================================================================================================================
Skipping packages with broken dependencies:
postgresql10-devel x86_64 10.15-1PGDG.rhel8 pgdg10 2.1 M
postgresql11-devel x86_64 11.10-1PGDG.rhel8 pgdg11 2.1 M
postgresql11-devel x86_64 11.8-2PGDG.rhel8 pgdg11 2.1 M
postgresql11-devel x86_64 11.9-1PGDG.rhel8 pgdg11 2.1 M
postgresql11-devel x86_64 11.9-4PGDG.rhel8 pgdg11 2.1 M
postgresql12-devel x86_64 12.3-4PGDG.rhel8 pgdg12 2.2 M
postgresql12-devel x86_64 12.3-5PGDG.rhel8 pgdg12 2.2 M
postgresql12-devel x86_64 12.4-1PGDG.rhel8 pgdg12 2.2 M
postgresql12-devel x86_64 12.4-4PGDG.rhel8 pgdg12 2.2 M
postgresql12-devel x86_64 12.5-1PGDG.rhel8 pgdg12 2.2 M
postgresql13-devel x86_64 13.0-1PGDG.rhel8 pgdg13 2.3 M
postgresql13-devel x86_64 13.0-2PGDG.rhel8 pgdg13 2.3 M
postgresql13-devel x86_64 13.1-1PGDG.rhel8 pgdg13 2.3 M
Transaction Summary
==========================================================================================================================================================
Skip 13 Packages
Nothing to do.
Complete
dnf repolist
repo id repo name
appstream CentOS Linux 8 - AppStream
baseos CentOS Linux 8 - BaseOS
epel Extra Packages for Enterprise Linux 8 - x86_64
epel-modular Extra Packages for Enterprise Linux Modular 8 - x86_64
extras CentOS Linux 8 - Extras
pgdg-common PostgreSQL common RPMs for RHEL/CentOS 8 - x86_64
pgdg10 PostgreSQL 10 for RHEL/CentOS 8 - x86_64
pgdg11 PostgreSQL 11 for RHEL/CentOS 8 - x86_64
pgdg12 PostgreSQL 12 for RHEL/CentOS 8 - x86_64
pgdg13 PostgreSQL 13 for RHEL/CentOS 8 - x86_64
pgdg95 PostgreSQL 9.5 for RHEL/CentOS 8 - x86_64
pgdg96 PostgreSQL 9.6 for RHEL/CentOS 8 - x86_64
dnf module list perl
Last metadata expiration check: 0:49:49 ago on Tue 08 Dec 2020 18:49:06 IST.
CentOS Linux 8 - AppStream
Name Stream Profiles Summary
perl 5.24 common [d], minimal Practical Extraction and Report Language
perl 5.26 [d] common [d], minimal Practical Extraction and Report Language
perl 5.30 common [d], minimal Practical Extraction and Report Language
Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
perl --version
This is perl 5, version 26, subversion 3 (v5.26.3)...
dnf --disablerepo=pgdg\* update
Last metadata expiration check: 1:36:55 ago on Tue 08 Dec 2020 18:49:02 IST.
Dependencies resolved.
Nothing to do.
Complete!
因此，在禁用 pgdg 的同时进行更新是可行的。但不确定如何继续。