K8s: Fix the gitVersion response (required for kubectl) (#98571)

pkg/services/apiserver/builder/helper.go

@@ -232,7 +232,22 @@ func SetupConfig(
 		serverConfig.BuildHandlerChainFunc = buildHandlerChainFunc
 	}
 
-	serverConfig.EffectiveVersion = utilversion.DefaultKubeEffectiveVersion()
+	v := utilversion.DefaultKubeEffectiveVersion()
+	patchver := 0 // required for semver
+
+	info := v.BinaryVersion().Info()
+	info.BuildDate = time.Unix(buildTimestamp, 0).UTC().Format(time.RFC3339)
+	info.GitVersion = fmt.Sprintf("%s.%s.%d+grafana-v%s", info.Major, info.Minor, patchver, buildVersion)
+	info.GitCommit = fmt.Sprintf("%s@%s", buildBranch, buildCommit)
+	info.GitTreeState = fmt.Sprintf("grafana v%s", buildVersion)
+
+	info2 := v.EmulationVersion().Info()
+	info2.BuildDate = info.BuildDate
+	info2.GitVersion = fmt.Sprintf("%s.%s.%d+grafana-v%s", info2.Major, info2.Minor, patchver, buildVersion)
+	info2.GitCommit = info.GitCommit
+	info2.GitTreeState = info.GitTreeState
+
+	serverConfig.EffectiveVersion = v
 
 	if err := AddPostStartHooks(serverConfig, builders); err != nil {
 		return err

pkg/tests/apis/helper.go

@@ -20,7 +20,9 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/runtime/serializer/yaml"
 	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/version"
 	yamlutil "k8s.io/apimachinery/pkg/util/yaml"
+	apimachineryversion "k8s.io/apimachinery/pkg/version"
 	"k8s.io/client-go/discovery"
 	"k8s.io/client-go/dynamic"
 	"k8s.io/client-go/rest"
@@ -601,6 +603,31 @@ func (c *K8sTestHelper) NewDiscoveryClient() *discovery.DiscoveryClient {
 	return client
 }
 
+func (c *K8sTestHelper) GetVersionInfo() apimachineryversion.Info {
+	c.t.Helper()
+
+	disco := c.NewDiscoveryClient()
+	req := disco.RESTClient().Get().
+		Prefix("version").
+		SetHeader("Accept", "application/json")
+
+	result := req.Do(context.Background())
+	require.NoError(c.t, result.Error())
+
+	raw, err := result.Raw()
+	require.NoError(c.t, err)
+	info := apimachineryversion.Info{}
+	err = json.Unmarshal(raw, &info)
+	require.NoError(c.t, err)
+
+	// Make sure the gitVersion is parsable
+	v, err := version.Parse(info.GitVersion)
+	require.NoError(c.t, err)
+	require.Equal(c.t, info.Major, fmt.Sprintf("%d", v.Major()))
+	require.Equal(c.t, info.Minor, fmt.Sprintf("%d", v.Minor()))
+	return info
+}
+
 func (c *K8sTestHelper) GetGroupVersionInfoJSON(group string) string {
 	c.t.Helper()
 

pkg/tests/apis/playlist/playlist_test.go

@@ -49,6 +49,9 @@ func TestIntegrationPlaylist(t *testing.T) {
 			EnableFeatureToggles: []string{},
 		}))
 
+		// Ensure the k8s version is valid
+		_ = h.GetVersionInfo()
+
 		// The accepted verbs will change when dual write is enabled
 		disco := h.GetGroupVersionInfoJSON("playlist.grafana.app")
 		// fmt.Printf("%s", disco)