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Cluster: find peer pods by listing pods, not Endpoints
8cfafe0 · Gabriel Morell · 2026-10-27 13:48
Message
{commit_body(@commit)}
Files changed
modified
config/runtime.exs
+7
−0
@@ -330,6 +330,13 @@ if config_env() == :prod do
| 330 | 330 | strategy: Cluster.Strategy.Kubernetes, |
| 331 | 331 | config: [ |
| 332 | 332 | mode: :ip, |
| 333 | + # Peers are found by listing *pods* with the selector. The | |
| 334 | + # default (:endpoints) filters Endpoints objects by it, and | |
| 335 | + # those carry their Service's labels, not the pods' — so | |
| 336 | + # with an unlabelled headless Service it found nobody, and | |
| 337 | + # every replica ran alone (PubSub, the L2 cache) without a | |
| 338 | + # word in the log. The pods carry the label; RBAC lists them. | |
| 339 | + kubernetes_ip_lookup_mode: :pods, | |
| 333 | 340 | kubernetes_selector: selector, |
| 334 | 341 | kubernetes_service_name: service, |
| 335 | 342 | kubernetes_node_basename: basename, |
Parents: 5f79844