This clustering strategy works by loading all your Erlang nodes (within Pods) in the current Kubernetes namespace. It will fetch the addresses of all pods under a shared headless service and attempt to connect. It will continually monitor and update its connections every 5s.

It assumes that all Erlang nodes were launched under a base name, are using longnames, and are unique based on their FQDN, rather than the base hostname. In other words, in the following longname, <basename>@<ip>, basename would be the value configured through application_name.

An example configuration is below:

config :libcluster,
  topologies: [
    k8s_example: [
      strategy: Elixir.Cluster.Strategy.Kubernetes.DNS,
      config: [
        service: "myapp-headless",
        application_name: "myapp",
        polling_interval: 10_000]]]