[Need Help]Issue regarding Python version for packages.

[Aniket21mathur]

As per the installation guide, when installing from sources we can select the Python version from which we have to install as per eeeeaba.

But when installing from binaries (Debian/ Ubuntu), unlike sudo apt install python-foo and sudo apt install python3-foo, we simply do

apt-get install syslog-ng

this installs for which version of Python?

Are the binaries only build for a specific version of python?

Thanks!

[alltilla]

The syslog-ng package itself does not have python support, you will need to install syslog-ng-mod-python, too. You can see its python dependency by running apt show syslog-ng-mod-python:

[09:46][ ~ ] $ apt show syslog-ng-mod-python
Package: syslog-ng-mod-python
Version: 0.3.3-2ubuntu1
Priority: extra
Section: universe/admin
Source: syslog-ng-incubator
Origin: Ubuntu
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: syslog-ng maintainers <syslog-ng-maintainers@lists.alioth.debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 66,6 kB
Depends: libc6 (>= 2.14), libevtlog0 (>= 0.2.3), libglib2.0-0 (>= 2.12.0), libpython2.7 (>= 2.7), syslog-ng-core (>= 3.5.6~), syslog-ng-core (<< 3.5.7~)
...

In my case, on ubuntu-xenial, it depends on libpython2.7, as you can see.

[Aniket21mathur]

Thanks for explaining.
slog-ng-mod-python package builds for Python 2, right?
Do we have support for Python 3 as well? Can we build it for Python 3?

[Kokan]

Yes, there is python 3 support. But the syslog-ng-mod-python either compiles as 2 or 3.

The configure scripts detects python version (looks for python3, python2 and python). You can also force it to use either version via ./configure --with-python=<version number> as --with-python=3.

Also additionally newer version of syslog-ng reports which version it does support via:

> syslog-ng --module-registry|grep -A 10 python
Module: mod-python
Status: ok
Version: 3.22.1.17.g1742b11
Core-Revision: 3.22
Description:
  The python (python3) module provides Python scripted destination support for syslog-ng.
Plugins:
  destination     python
  source          python
  source          python_fetcher
  root            python
  parser          python
  template-func   python

[Aniket21mathur]

The configure scripts detects python version (looks for python3, python2 and python). You can also force it to use either version via ./configure --with-python=<version number> as --with-python=3.

Thanks. Agreed. We have to follow this when installing from source.
I wanted to ask what if we install through packages. Do we have separate packages for Python 2 and 3, or a multi-version package that installs for both upon specifying like python-foo and python3-foo.

[Kokan]

Do we have separate packages for Python 2 and 3, or a multi-version package that installs for both upon specifying like python-foo and python3-foo.

I do not really use either ubuntu/debian, but as far as I am aware there is only one package that is either 2 or 3; so no to both of your question.
On the other hand the option to have both python2 and python3 module available in the same time is not possible from syslog-ng point of view. In short in the configuration there is only python keyword, which should point to one version.

[Aniket21mathur]

Got your point. Thanks for helping! :-)