So...what is a container anyway? Liz Rice @lizrice | @microscaling So...what is a container anyway? With thanks to Julien Friedman @doctor_julz App A App B bins / libs OS server App A App B App C App D Hbyinpse r/v ilsibosr Hbyinpse /rv liisbosr Guest OS Guest OS Hypervisor Host OS server App A App B App C bins / libs bins / libs Host OS server Namespaces “What you can see” UNIX Timesharing System Process IDs File system (mount points) Users IPC Networking Control groups “What you can use” CPU Memory Disk I/O Network Device permissions (/dev) image App A App B App C bins / libs bins / libs Host OS server