Troubleshooting

Some of these problems might be open issues pending to be fixed.

Packet Tracer Manager’s API shows a 502 error

Description: nginx returns a 502 Bad Gateway error.

Solution execute and wait some seconds:

sudo supervisorctl restart flask_app

Installation

Missing password in Ansible

Ansible throws an error which says: Missing become password.

• What happens? The remote user you are running needs to introduce a password to become sudo.
• Quick solution: Add the --ask-become-pass parameter.

Docker image building

The Docker image cannot been built correctly the first time you run the Ansible script: dial unix /var/run/docker.sock: permission denied

• What happens? The SSH connection used by Ansible does not know that the user is now part of the docker group (because it has join the group within the same session). This problem is explained in more detail here (BTW, the solution described there does not work for me).
• Quick solution: run the Ansible script (or the Vagrant one which uses it) a second time.

Packet Tracer gets stuck because of an HTTP proxy

The PT instance gets stuck in a machine running behind a HTTP proxy and logs don’t show any meaningful information.

• Strange as it may sound, you might want to unset the proxy for PacketTracer.