I’ve been running HA on my Pi 3 for quite a few years but it’s showing signs of it’s age now.
I’ve recently bit the bullet and installed ubuntu on an old MSI industrial micro PC.
I’ve manged to set up Docker & Portainer. Home Assistant is running on Docker fine and I can get to the HA web UI no problem.
What is confusing me - I do not see any instances of HA in Portainer.
I’m totally new to all of this and it’s quite a steep learning curve so bare with me.
I’ve checked the settings for Hidden Containers and there are none listed.
I only see 3 containers with images for hello-world all showing as exited.
Under Images I only see hello-world:latest.
You probably have two instances of docker running. Especially if you installed docker from Ubuntu’s repositories and then later followed a separate guide to install Portainer and/or HA.
In your title you also mention HAOS is not visible. You wouldn’t see that from the installation method you described.
You don’t say what procedure you used to install the HA Docker container. Did you install it from the command line or via Portainer? If the latter, was it a standalone container or a stack?
If you installed it outside of Portainer, it may not show up in Portainer. Alternatively, it may appear but be unmanageable.