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authorKleidi Bujari <mail@4kb.net>2025-04-02 22:11:38 -0400
committerKleidi Bujari <mail@4kb.net>2025-04-02 22:11:38 -0400
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----
-title: "On stateless compute networks"
-date: "2024-11-10"
-draft: true
----
-
-On the topic of distributed systems and clustering,
-I am quite invested in the idea of compute nodes that rely entirely on the network for configuration.
-Arbitrary nodes can join a pre-existing cluster,
-offering their CPU time and memory for computation without relying on any pre-existing configuration on the node itself.
-In other words, any computer could pick up work,
-only needing power and a network connection to the cluster.
-
-Perhaps this eventually leads into a "self-healing" cluster where only one node is manually bootstrapped,
-which then serves a _configuration endpoint_ for other stateless nodes to reach out to for their instructions,
-which they will then also serve once they are themselves ready.
-
-Early revisions of these notes mention Kubernetes,
-but I am also trying to achieve similar results with NixOS on a custom project.
-In any case, these are my ever-updating notes towards a general implementation of a stateless distributed systems architecture.
-
-## Self healing cluster
-
-Assuming control of an external DHCP server,
-a self healing Kubernetes cluster would be feasible,
-with the PXE boot artifacts supplied by the cluster itself.
-That is, as long as one node is running the pod hosting the artifacts on a given endpoint,
-other nodes can boot those artifacts and join the cluster,
-thereby being able to host the artifacts as well.
-
-## Configuration endpoint
-
-The nodes shouldn't require a disk installed to be able to join the network.
-Rather, the lofty goal of zero-configuration compute nodes passes the job of node initialization to the supporting network.
-This is accomplished with PXE boot instructions supplied over DHCP.
-
-I delegate the following tasks to a single node in the subnet:
-
-- Gateway: Optional outbound connections if required
-- DHCP server: Cluster IPAM
-- TFTP and HTTP server: Serves iPXE firmware and kernel/initrd artifacts