Wait until Nomad is running before bootstrapping ACLs

nomad/setup-cluster.yml

@@ -404,7 +404,18 @@
   hosts: nomad_instances
 
   tasks:
-    # Need to wait until nomad is running
+    - name: Nomad API reachable?
+      uri:
+        url: "http://127.0.0.1:4646/v1/status/leader"
+        method: GET
+        status_code: 200
+      register: nomad_check_result
+      retries: 6
+      until: nomad_check_result is succeeded
+      delay: 10
+      changed_when: false
+      run_once: true
+
     - name: Bootstrap ACLs
       command:
         argv: