Listing all namespaces names in given cluster

list-namespaces.clj

(ns cleanup-wg.core
  (:import [io.kubernetes.client.util ClientBuilder]
           [io.kubernetes.client.util KubeConfig]
           [io.kubernetes.client Configuration]
           [io.kubernetes.client.apis CoreV1Api])
  (:gen-class))

(defn -main
  "List all namespaces on given Kubernetes cluster"
  [& args]

  (Configuration/setDefaultApiClient
   (.build
    (ClientBuilder/kubeconfig
     (KubeConfig/loadKubeConfig
      (clojure.java.io/reader "/Users/afernandez/.kube/config")))))

  (def api (CoreV1Api.))

  (doseq [item
          (.getItems
           (.listNamespace api nil nil nil nil nil nil nil nil))]
    (println (.getName (.getMetadata item)))))