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Docker is bare metal
Aye. Docker on linux doesn't involve any virtualization layer. What should the direct the installation setup be called? Custom setup?
Just non-container if you need to distinguish?
Well, since we want to be technical ... Docker is not bare metal. Linux apps are not bare metal. Arduino is bare metal.
No. The phrase means that you're not running in a virtual machine.
That's only the meaning you're used to, and that's my point. It depends on the context. I can assure you that, in the context of microcontrollers, for example, "bare metal" means running without an OS.
Either way its pretty stupid to use it in reference to containers.
My point is, since its meaning depends on the context, I don't see the issue for it to mean, in the context of containers, "outside of a container". Just like in the case of VMs, or OS vs No OS, it means there's one fewer layer between the app and the hardware, whether that's a VM, Container runtime, or the OS.
I'm pretty sure everybody, including you, understood its meaning in this context, it didn't really cause any misunderstanding.
No, it's confusing. Because some people do use VMs. So it makes it far less clear about what a person's setup is.
An application running in a container runs exactly the same as a non-container application. It uses the same kernel. And it all runs directly on the CPU. There is no metal/non-metal distinction to make. People just say it because it "sounds cool". And there are a lot of people in this community who don't understand what containers are. So it further muddies the water