1 files changed, 78 insertions, 0 deletions
diff --git a/nixpkgs/nixos/tests/k3s.nix b/nixpkgs/nixos/tests/k3s.nix
new file mode 100644
index 000000000000..5bda6f493f0e
--- /dev/null
+++ b/nixpkgs/nixos/tests/k3s.nix
@@ -0,0 +1,78 @@
+import ./make-test-python.nix ({ pkgs, ... }:
+
+let
+  # A suitable k3s pause image, also used for the test pod
+  pauseImage = pkgs.dockerTools.buildImage {
+    name = "test.local/pause";
+    tag = "local";
+    contents = with pkgs; [ tini coreutils busybox ];
+    config.Entrypoint = [ "/bin/tini" "--" "/bin/sleep" "inf" ];
+  };
+  testPodYaml = pkgs.writeText "test.yml" ''
+    # Don't use the default service account because there's a race where it may
+    # not be created yet; make our own instead.
+    apiVersion: v1
+    kind: ServiceAccount
+    metadata:
+      name: test
+    ---
+    apiVersion: v1
+    kind: Pod
+    metadata:
+      name: test
+    spec:
+      serviceAccountName: test
+      containers:
+      - name: test
+        image: test.local/pause:local
+        imagePullPolicy: Never
+        command: ["sh", "-c", "sleep inf"]
+  '';
+in
+{
+  name = "k3s";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ euank ];
+  };
+
+  nodes = {
+    k3s =
+      { pkgs, ... }: {
+        environment.systemPackages = [ pkgs.k3s pkgs.gzip ];
+
+        # k3s uses enough resources the default vm fails.
+        virtualisation.memorySize = pkgs.lib.mkDefault 1536;
+        virtualisation.diskSize = pkgs.lib.mkDefault 4096;
+
+        services.k3s.enable = true;
+        services.k3s.role = "server";
+        services.k3s.package = pkgs.k3s;
+        # Slightly reduce resource usage
+        services.k3s.extraFlags = "--no-deploy coredns,servicelb,traefik,local-storage,metrics-server --pause-image test.local/pause:local";
+
+        users.users = {
+          noprivs = {
+            isNormalUser = true;
+            description = "Can't access k3s by default";
+            password = "*";
+          };
+        };
+      };
+  };
+
+  testScript = ''
+    start_all()
+
+    k3s.wait_for_unit("k3s")
+    k3s.succeed("k3s kubectl cluster-info")
+    k3s.fail("sudo -u noprivs k3s kubectl cluster-info")
+    # k3s.succeed("k3s check-config") # fails with the current nixos kernel config, uncomment once this passes
+
+    k3s.succeed(
+        "zcat ${pauseImage} | k3s ctr image import -"
+    )
+
+    k3s.succeed("k3s kubectl apply -f ${testPodYaml}")
+    k3s.succeed("k3s kubectl wait --for 'condition=Ready' pod/test")
+  '';
+})