Re: postgresql15-contrib installation on Amazon Linux 2 fails on Python shared lib dependency

I'm using an EC2 on AWS running Amazon Linux 2. I'm trying to install Postgresql version 15 server along with the contrib libraries for various extension.

This is how I installed Posgres15

sudo rpm --import https://yum.postgresql.org/RPM-GPG-KEY-PGDG-15
sudo yum update -y
sudo yum install -y postgresql15-server postgresql15-contrib

PostgreSQL server installs correctly but fails during the contrib package install due to a dependency on Python. I am able to install just the server alone:

 sudo yum install -y postgresql15-server

Here is the error I get when installing postgresql15-contrib:

[ec2-user@ip-172-31-51-199 ~]$ sudo yum install -y  postgresql15-contrib 
Loaded plugins: dkms-build-requires, extras_suggestions, langpacks, priorities, update-motd
225 packages excluded due to repository priority protections
Resolving Dependencies
--> Running transaction check
---> Package postgresql15-contrib.x86_64 0:15.2-1PGDG.rhel7 will be installed
--> Processing Dependency: libxslt.so.1(LIBXML2_1.0.22)(64bit) for package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64
--> Processing Dependency: libxslt.so.1(LIBXML2_1.0.18)(64bit) for package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64
--> Processing Dependency: libxslt.so.1(LIBXML2_1.0.11)(64bit) for package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64
--> Processing Dependency: libxslt.so.1()(64bit) for package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64
--> Processing Dependency: libpython3.6m.so.1.0()(64bit) for package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64
--> Running transaction check
---> Package libxslt.x86_64 0:1.1.28-6.amzn2 will be installed
---> Package postgresql15-contrib.x86_64 0:15.2-1PGDG.rhel7 will be installed
--> Processing Dependency: libpython3.6m.so.1.0()(64bit) for package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64
--> Finished Dependency Resolution
Error: Package: postgresql15-contrib-15.2-1PGDG.rhel7.x86_64 (pgdg15)           Requires: libpython3.6m.so.1.0()(64bit)           Available: python3-libs-3.6.2-3.amzn2.0.2.x86_64 (amzn2extra-python3)               libpython3.6m.so.1.0()(64bit)           Available: python3-libs-3.6.2-3.amzn2.0.3.x86_64 (amzn2extra-python3)               libpython3.6m.so.1.0()(64bit)           Installed: python3-libs-3.7.16-1.amzn2.0.2.x86_64 (@amzn2-core)              ~libpython3.7m.so.1.0()(64bit)           Available: python3-libs-3.7.0-0.12.b2.amzn2.0.2.x86_64 (amzn2-core)              ~libpython3.7m.so.1.0()(64bit)           Available: python3-libs-3.7.0-0.16.b3.amzn2.0.1.x86_64 (amzn2-core)              ~libpython3.7m.so.1.0()(64bit)           Available: python3-libs-3.7.0-0.20.rc1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.0-0.20.rc1.amzn2.0.2.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.1-9.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.2-4.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.3-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.3-1.amzn2.0.2.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.4-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.4-1.amzn2.0.2.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.4-1.amzn2.0.3.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.4-1.amzn2.0.4.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.6-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.8-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.9-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.9-1.amzn2.0.2.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.9-1.amzn2.0.3.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.10-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.15-1.amzn2.0.1.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.15-1.amzn2.0.2.i686 (amzn2-core)               Not found           Available: python3-libs-3.7.16-1.amzn2.0.1.i686 (amzn2-core)               Not found You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest
[ec2-user@ip-172-31-51-199 ~]$ 

Python is definitely installed on the server and I can verify the version like this:

[ec2-user@ip-172-31-51-199 ~]$ python3 -V
Python 3.7.16
[ec2-user@ip-172-31-51-199 ~]$ 

And here is what I see when looking for the Python shared lib:

[ec2-user@ip-172-31-51-199 ~]$ sudo locate libpython
/home/ec2-user/timp/Python-3.6.12/libpython3.6m.a
/home/ec2-user/timp/Python-3.6.12/Tools/gdb/libpython.py
/usr/lib64/libpython2.7.so
/usr/lib64/libpython2.7.so.1.0
/usr/lib64/libpython3.7m.so.1.0
/usr/lib64/libpython3.8.so.1.0
/usr/lib64/libpython3.so
/usr/lib64/python2.7/config/libpython2.7.so
/usr/local/lib/libpython3.6m.a
/usr/local/lib/python3.6/config-3.6m-x86_64-linux-gnu/libpython3.6m.a
/usr/share/systemtap/tapset/libpython2.7-64.stp
[ec2-user@ip-172-31-51-199 ~]$ 

What am I missing? Why won't the postgresql15-contrib install find my python shared lib? Does it have to be python3.6 only? Is 3.7, 3.8 no good?

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