nixos/victorialogs: add integration test with vlagent

nixos/tests/all-tests.nix

···
   vector = import ./vector { inherit runTest; };
   velocity = runTest ./velocity.nix;
   vengi-tools = runTest ./vengi-tools.nix;
-  victorialogs = runTest ./victorialogs.nix;
+  victorialogs = import ./victorialogs { inherit runTest; };
   victoriametrics = import ./victoriametrics { inherit runTest; };
   vikunja = runTest ./vikunja.nix;
   virtualbox = handleTestOn [ "x86_64-linux" ] ./virtualbox.nix { };

nixos/tests/victorialogs.nix nixos/tests/victorialogs/local-write.nix

···
 { lib, ... }:
 {
-  name = "victorialogs";
+  name = "victorialogs-local-write";
   meta.maintainers = with lib.maintainers; [ marie ];
 
   nodes.machine =

nixos/tests/victorialogs/default.nix

···
+{ runTest }:
+{
+  local-write = runTest ./local-write.nix;
+  remote-write-with-vlagent = runTest ./remote-write-with-vlagent.nix;
+}

nixos/tests/victorialogs/remote-write-with-vlagent.nix

···
+{ lib, pkgs, ... }:
+let
+
+  username = "vltest";
+  password = "rUceu1W41U"; # random string
+  passwordFile = pkgs.writeText "password-file" password;
+in
+{
+  name = "victorialogs-remote-write-with-vlagent";
+  meta.maintainers = [ lib.maintainers.shawn8901 ];
+
+  nodes.server =
+    { pkgs, ... }:
+    {
+      networking.firewall.allowedTCPPorts = [ 9428 ];
+      services.victorialogs = {
+        enable = true;
+        basicAuthUsername = username;
+        basicAuthPasswordFile = toString passwordFile;
+      };
+    };
+
+  nodes.client =
+    { pkgs, ... }:
+    {
+      services.vlagent = {
+        enable = true;
+        remoteWrite = {
+          url = "http://server:9428/internal/insert";
+          basicAuthUsername = username;
+          basicAuthPasswordFile = toString passwordFile;
+        };
+      };
+
+      services.journald.upload = {
+        enable = true;
+        settings = {
+          Upload.URL = "http://localhost:9429/insert/journald";
+        };
+      };
+      environment.systemPackages = [ pkgs.curl ];
+
+    };
+
+  testScript = ''
+    server.wait_for_unit("victorialogs.service")
+    server.wait_for_open_port(9428)
+
+    client.wait_for_unit("vlagent")
+    client.wait_for_open_port(9429)
+
+    client.wait_for_unit("systemd-journal-upload")
+
+    client.succeed("echo 'meow' | systemd-cat -p info")
+
+    server.wait_until_succeeds("curl -u ${username}:${password} --fail http://localhost:9428/select/logsql/query -d 'query=\"meow\"' | grep meow")
+  '';
+}