Basic consul config.

hosts/common/compute-node.nix

@@ -1,6 +1,7 @@
 { pkgs, ... }:
 {
   imports = [
+    ./consul.nix
     ./impermanence.nix
     ./nomad.nix
     ./seaweedfs.nix

hosts/common/consul.nix

@@ -1,8 +1,22 @@
 { pkgs, config, ... }:
+let
+  servers = [ "c1" "c2" "c3" ];
+  server_enabled = builtins.elem config.networking.hostName servers;
+in
 {
-  services.consul.enable = true;
+  services.consul = {
+    enable = true;
+    interface.advertise = "eno1";
+    extraConfig = {
+      datacenter = "alo";
+      server = server_enabled;
+      bootstrap_expect = (builtins.length servers + 2) / 2;
+      retry_join = builtins.filter (elem: elem != config.networking.hostName) servers;
+    };
+  };
 
   environment.persistence."/persist".directories = [
+    "/var/lib/consul"
   ];
 
   networking.firewall = {