Django import error while installing Tacker via Devstack: No module named django.core.management

I am trying to install Tacker via Devstack. I am following this installation guide. I use same local.conf as in the guide. However, after running ./stack.sh, I see this error: Requirement already satisfied: pyperclip===1.7.0 in /usr/local/lib/python3.6/dist-packages (from -c /opt/stack/requirements/upper-constraints.txt (line 453)) Requirement already satisfied: wcwidth===0.1.7 in /usr/local/lib/python3.6/dist-packages (from -c /opt/stack/requirements/upper-constraints.txt (line 694)) Requirement already satisfied:…

Strange constant message im mail.log: lost connection after AUTH from unknown

Anyone can help me understanding this message that keeps appearing in my mail.log: Dec 6 19:53:53 localhost postfix/smtpd[4873]: connect from unknown[185.234.219.94] Dec 6 19:53:53 localhost postfix/smtpd[4873]: lost connection after AUTH from unknown[185.234.219.94] Dec 6 19:53:53 localhost postfix/smtpd[4873]: disconnect from unknown[185.234.219.94] ehlo=1 auth=0/1 commands=1/2 I have fail2ban installed but it seems that is not block this…