nixos tests: add test for declarative containers, that container config changes

are applied on `nixos-rebuild switch` invocations.

1 files changed, 66 insertions, 0 deletions

diff --git a/nixos/tests/containers-reloadable.nix b/nixos/tests/containers-reloadable.nix
new file mode 100644
index 000000000000..b5867c6f6ab1
--- /dev/null
+++ b/nixos/tests/containers-reloadable.nix
@@ -0,0 +1,66 @@
+import ./make-test.nix ({ pkgs, lib, ...} :
+let
+  client_base = rec {
+    
+    containers.test1 = {
+      autoStart = true;
+      config = {
+        environment.etc."check".text = "client_base";
+      };
+    };
+
+    # prevent make-test.nix to change IP
+    networking.interfaces = {
+      eth1.ip4 = lib.mkOverride 0 [ ];
+    };
+  };
+in {
+  name = "cotnainers-reloadable";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ danbst ];
+  };
+
+  nodes = {
+    client = { lib, pkgs, ... }: {
+      imports = [ client_base ];
+    };
+
+    client_c1 = { lib, pkgs, ... }: {
+      imports = [ client_base ];
+
+      containers.test1.config = {
+        environment.etc."check".text = lib.mkForce "client_c1";
+        services.httpd.enable = true;
+        services.httpd.adminAddr = "nixos@example.com";
+      };
+    };
+    client_c2 = { lib, pkgs, ... }: {
+      imports = [ client_base ];
+
+      containers.test1.config = {
+        environment.etc."check".text = lib.mkForce "client_c2";
+        services.nginx.enable = true;
+      };
+    };
+  };
+
+  testScript = {nodes, ...}: let
+    originalSystem = nodes.client.config.system.build.toplevel;
+    c1System = nodes.client_c1.config.system.build.toplevel;
+    c2System = nodes.client_c2.config.system.build.toplevel;
+  in ''
+    $client->start();
+    $client->waitForUnit("default.target");
+    $client->succeed("[[ \$(nixos-container run test1 cat /etc/check) == client_base ]] >&2");
+
+    $client->succeed("${c1System}/bin/switch-to-configuration test >&2");
+    $client->succeed("[[ \$(nixos-container run test1 cat /etc/check) == client_c1 ]] >&2");
+    $client->succeed("systemctl status httpd -M test1 >&2");
+
+    $client->succeed("${c2System}/bin/switch-to-configuration test >&2");
+    $client->succeed("[[ \$(nixos-container run test1 cat /etc/check) == client_c2 ]] >&2");
+    $client->fail("systemctl status httpd -M test1 >&2");
+    $client->succeed("systemctl status nginx -M test1 >&2");
+  '';
+
+})