etcd.nix: minor fixes (#350937)

# This test runs simple etcd node

import ../make-test-python.nix ({ pkgs, ... } : {

  name = "etcd";

  meta = with pkgs.lib.maintainers; {

    maintainers = [ offline ];

  };

  nodes = {

    node = { ... }: {

      services.etcd.enable = true;

      services.etcd = {

        enable = true;

        # Ensure etcd is ready to accept connections

        extraConf = {

          "initial-advertise-peer-urls" = "http://localhost:2380";

          "listen-peer-urls" = "http://localhost:2380";

          "listen-client-urls" = "http://localhost:2379";

          "advertise-client-urls" = "http://localhost:2379";

        };

      };

    };

  };

    with subtest("should start etcd node"):

        node.start()

        node.wait_for_unit("etcd.service")

        # Add additional wait for actual readiness

        node.wait_until_succeeds("etcdctl endpoint health")

    with subtest("should write and read some values to etcd"):

        node.succeed("etcdctl put /foo/bar 'Hello world'")

        node.succeed("etcdctl get /foo/bar | grep 'Hello world'")

        node.succeed("etcdctl --endpoints=http://localhost:2379 put /foo/bar 'Hello world'")

        node.succeed("etcdctl --endpoints=http://localhost:2379 get /foo/bar | grep 'Hello world'")

  '';

})