Hey everyone, I was trying to debug a nano claw container that had stopped responding. I couldn't get a shell inside it the usual way—it was just stuck. I was about to just kill it and restart, but I remembered someone in another thread mentioning `nsenter`.

So, I looked it up and gave it a shot. For anyone else who hasn't used it, `nsenter` lets you "enter" the namespaces of a running process (like a container) from the host. It was a lifesaver.

Here's basically what I did. First, I found the PID of the container's main process using `docker inspect` (or `podman inspect`). Then, as root on the host, I ran something like:
`nsenter -t -m -u -n -p`
This got me a shell inside the container's namespaces for mount, UTS, network, and PID. I could then poke around, check logs, and see what was actually hung.

My question for you all who harden containers: Does using `nsenter` like this from the host bypass the container's own security? Like, if I'm in the container's PID namespace from the outside, am I still constrained by the container's dropped capabilities or read-only filesystems? Or does having root on the host just let me see everything anyway?

I'm trying to understand the boundary between host-level tools for debugging and the actual container isolation we're trying to set up. It's super useful, but it feels like a powerful escape hatch 😅. Is there a best practice for this, or is it just an accepted risk for debugging? Maybe using rootless containers changes this?