cluster/services/consul/default.nix

@@ -22,6 +22,11 @@ in
       ];
       ready = ./ready.nix;
     };
+    simulacrum = {
+      enable = true;
+      deps = [ "wireguard" ];
+      settings = ./test.nix;
+    };
   };
 
   dns.records."consul-remote.internal".consulService = "consul-remote";

cluster/services/consul/test.nix

@@ -0,0 +1,20 @@
+{
+  testScript = ''
+    import json
+
+    start_all()
+
+    with subtest("should form cluster"):
+      nodes = [ n for n in machines if n != nowhere ]
+      for machine in nodes:
+        machine.succeed("systemctl start consul-ready.service")
+      for machine in nodes:
+        consulConfig = json.loads(machine.succeed("cat /etc/consul.json"))
+        addr = consulConfig["addresses"]["http"]
+        port = consulConfig["ports"]["http"]
+        setEnv = f"CONSUL_HTTP_ADDR={addr}:{port}"
+        memberList = machine.succeed(f"{setEnv} consul members --status=alive")
+        for machine2 in nodes:
+          assert machine2.name in memberList
+  '';
+}