Log a warning when starting the viewer from inside a Docker container

[emilk]

Running the Rerun Viewer from inside a docker container has several problems:

• File dialogs may not work
• Clipboard may not work
• You may get crashes
• You may see graphics bugs
• You may have performance issues

So let's at least warn the user that this is a bad idea!

I also added is_docker to our analytics events so we can see how common this is amongst our users.

Related

• Add troubleshooting or how-to guide related to running Rerun in a Docker container #6835
• docker container does not run on GPU #7324
• Can't click top-bar buttons when fullscreen on macOS #10280

TODO

• Test running this from inside a docker container to see that the warning actually show up :)

[github-actions]

Web viewer built successfully. If applicable, you should also test it:

• I have tested the web viewer

Result	Commit	Link	Manifest
✅	a1f3c64	https://rerun.io/viewer/pr/10306	+nightly +main

^{Note: This comment is updated whenever you push a commit.}

[Wumpf]

@abey79 this is good for landing but simply nobody tested it?

[abey79]

@abey79 this is good for landing but simply nobody tested it?

I think so yes? I sure didn't test it.

[Wumpf]

dedusted my docker windows install, having it run in the background and do some building

[Wumpf]

okay apparently running a graphical linux container on a windows host is pita. Someone with native Linux should try it

[Wumpf]

@jleibs volunteered to give it a spin

[Wumpf]

unfortunately nobody on the team who tried has been able to actually run Rerun in their Docker environments so far (not that we tried a lot)
Looking over the changes this looks benign enough to ship it anyways. Don't see how this could cause issues and even if there were false positives it's not a problem

[jleibs]

I can confirm this produces a warning on the CLI when running:

root@64ae1f4b82e9:/# rerun
[2025-07-15T19:00:09Z WARN  re_viewer::native] It looks like you are running the Rerun Viewer inside a Docker container. This is not officially supported, and may lead to performance issues and bugs. See https://github.com/rerun-io/rerun/issues/6835 for more.

However, that warning does not show up as a notification in the viewer itself.

[emilk]

However, that warning does not show up as a notification in the viewer itself.

• Fix in: Show warning about running inside of Docker in top panel #10786