In this article I want to talk about a runC container which I want to migrate around the world while clients stay connected to the application.
In my previous Checkpoint/Restore In Userspace (CRIU) articles I introduced CRIU (From Checkpoint/Restore to Container Migration) and in the follow-up I gave an example how to use it in combination with containers (Container Live Migration Using runC and CRIU). Recently Christian Horn published an additional article about CRIU which is also a good starting point.
In my container I am running Xonotic. Xonotic calls itself ‘The Free and Fast Arena Shooter’. The part that is running in the container is the server part of the game to which multiple clients can connect to play together. In this article the client is running on my local system while the server and its container is live migrated around the world.
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