I need to build an application that has many bare-metal nodes joined in a Kubernetes cluster and I need a shared persistent file system between those nodes. The nodes should be able to read-write in this file system simultaneously.
Bonus: is there a way to keep the file system alive even if the cluster crashes?
I read this article but cant find answers to this question.
This problem is very important to me because it is a requirement to my undergraduate paper.
Yes it does. What you're looking for is to set your AccessMode to ReadWriteMany. Note that not all Volume Plugins provide ReadWriteMany.
Multiple pods might be reading/writing to the Volume plugin at the same time. If a node/pod were to restart, you would still have access to the volume.
To get a full list of what which Volume Plugin supports that, refer to the official documentation.