Added k3s test

tests/k8s/deployment-k3s.nix

@@ -0,0 +1,70 @@
+{ config, lib, pkgs, kubenix, images, k8sVersion, ... }:
+
+with lib;
+
+let
+  cfg = config.kubernetes.api.resources.deployments.nginx;
+  image = images.nginx;
+in {
+  imports = [ kubenix.modules.test kubenix.modules.k8s kubenix.modules.docker ];
+
+  test = {
+    distro = "k3s";
+    name = "k8s-deployment-k3s";
+    description = "Simple k8s testing a simple deployment";
+    assertions = [{
+      message = "should have correct apiVersion and kind set";
+      assertion =
+        if ((builtins.compareVersions config.kubernetes.version "1.7") <= 0)
+        then cfg.apiVersion == "apps/v1beta1"
+        else if ((builtins.compareVersions config.kubernetes.version "1.8") <= 0)
+        then cfg.apiVersion == "apps/v1beta2"
+        else cfg.apiVersion == "apps/v1";
+    } {
+      message = "should have corrent kind set";
+      assertion = cfg.kind == "Deployment";
+    } {
+      message = "should have replicas set";
+      assertion = cfg.spec.replicas == 10;
+    }];
+    extraConfiguration = {
+      environment.systemPackages = [ pkgs.curl ];
+      services.kubernetes.kubelet.seedDockerImages = config.docker.export;
+    };
+    testScript = ''
+      $kube->waitUntilSucceeds("kubectl apply -f ${config.kubernetes.result}");
+
+      $kube->succeed("kubectl get deployment | grep -i nginx");
+      $kube->waitUntilSucceeds("kubectl get deployment -o go-template nginx --template={{.status.readyReplicas}} | grep 10");
+      $kube->waitUntilSucceeds("curl http://nginx.default.svc.cluster.local | grep -i hello");
+    '';
+  };
+
+  docker.images.nginx.image = image;
+
+  kubernetes.version = k8sVersion;
+
+  kubernetes.resources.deployments.nginx = {
+    spec = {
+      replicas = 10;
+      selector.matchLabels.app = "nginx";
+      template.metadata.labels.app = "nginx";
+      template.spec = {
+        containers.nginx = {
+          image = config.docker.images.nginx.path;
+          imagePullPolicy = "Never";
+        };
+      };
+    };
+  };
+
+  kubernetes.resources.services.nginx = {
+    spec = {
+      ports = [{
+        name = "http";
+        port = 80;
+      }];
+      selector.app = "nginx";
+    };
+  };
+}