So I am working with our Linux admin to install mailman3 in centos7 following this instructions https://docs.mailman3.org/en/latest/install/virtualenv.html# (and adjusting for centos versus Debian) The install went fine with the command “pip install wheel mailman psycopg2-binary”until the config file. /etc/mailman3/mailman.cfg

The /etc/mailman3 directory did not get created? Should it have?

We created it and the config file

But “mailman info” throws errors

venv) [mailman@bmimailmandr2 var]$ mailman info Traceback (most recent call last): File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 2336, in _wrap_pool_connect return fn() File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 364, in connect return _ConnectionFairy._checkout(self) File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 778, in _checkout fairy = _ConnectionRecord.checkout(pool) File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 495, in checkout rec = pool._do_get() File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/pool/impl.py", line 140, in _do_get self._dec_overflow() File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 70, in __exit__ with_traceback=exc_tb, File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 182, in raise_ raise exception File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/pool/impl.py", line 137, in _do_get return self._create_connection() File "/opt/mailman/venv/lib64/python3.6/site-packages/sqlalchemy/pool/base.py", line 309, in _create_connection return _ConnectionRecor

I suspect it is not using the config file at /etc/mailman3/mailman.cfg But we do not even see a mailman service in /etc/systemd/system/mailman3.service.

Also, we are using python 3.6, will that be a major issue? or should spend the time to install 3.7 from source?