Ouroboros And Portainer Enabled By Default
These tools are extremely useful for people getting used to running docker. Their official documentation should explain why but you can disable either or both of them if you want.
Ouroboros will monitor (all or specified) running docker containers and update them to the (latest or tagged) available image in the remote registry.
Portainer allows you to manage your Docker stacks, containers, images, volumes, networks and more! It is compatible with the standalone Docker engine and with Docker Swarm.
In short, Ouroboros keeps your Containers up to date and Portainer gives you a WebGUI for starting and stopping Containers. Have a look, at
DockSTARTer previously enabled Watchtower by default before Ouroboros. The two do almost the same thing, but Ouroboros has more options.
General troubleshooting help
You can see the (quite helpful) logs of each container with a Quick action in Portainer:
Creating network "compose_default" with the default driver ERROR: could not find an available, non-overlapping IPv4 address pool among the defaults to assign to the network
This error can occur if your connected to a VPN while setting up the containers. Simply temporarily disconnect your VPN connection until the containers have been created and then reconnect again.
Starting containers and getting the following or a similar error message: "listen udp 0.0.0.0:5353: bind: address already in use"
As you could probably guess this means an application (most likely plex) is trying to use a port that is already in use. You can check which application it is with:
sudo lsof -i :<myport>
So in this example it would be:
sudo lsof -i :5353
which will show you that Google Chrome is using the port you need. In this case you could just close Chrome, but there may be applications you need to uninstall for this to work properly.