nixos/envoy: add option `requireValidConfig` to make config validation errors non-fatal

Co-authored-by: Vincent Haupert <vincent@yaxi.tech>

1 files changed, 27 insertions, 6 deletions

diff --git a/nixos/tests/envoy.nix b/nixos/tests/envoy.nix
index a14c1fca3bb5f..1e4bfe626398e 100644
--- a/nixos/tests/envoy.nix
+++ b/nixos/tests/envoy.nix
@@ -22,12 +22,33 @@ import ./make-test-python.nix ({ pkgs, lib, ...} : {
         clusters = [];
       };
     };
+    specialisation = {
+      withoutConfigValidation.configuration = { ... }: {
+        services.envoy = {
+          requireValidConfig = false;
+          settings.admin.access_log_path = lib.mkForce "/var/log/envoy/access.log";
+        };
+      };
+    };
   };
 
-  testScript = ''
-    machine.start()
-    machine.wait_for_unit("envoy.service")
-    machine.wait_for_open_port(80)
-    machine.wait_until_succeeds("curl -fsS localhost:80/ready")
-  '';
+  testScript = { nodes, ... }:
+    let
+      specialisations = "${nodes.machine.system.build.toplevel}/specialisation";
+    in
+    ''
+      machine.start()
+
+      with subtest("envoy.service starts and responds with ready"):
+        machine.wait_for_unit("envoy.service")
+        machine.wait_for_open_port(80)
+        machine.wait_until_succeeds("curl -fsS localhost:80/ready")
+
+      with subtest("envoy.service works with config path not available at eval time"):
+        machine.succeed('${specialisations}/withoutConfigValidation/bin/switch-to-configuration test')
+        machine.wait_for_unit("envoy.service")
+        machine.wait_for_open_port(80)
+        machine.wait_until_succeeds("curl -fsS localhost:80/ready")
+        machine.succeed('test -f /var/log/envoy/access.log')
+    '';
 })