Restart the frontend deployment to update site-config

cmd/frontend/graphqlbackend/BUILD.bazel

@@ -243,6 +243,7 @@ go_library(
         "//internal/actor",
         "//internal/adminanalytics",
         "//internal/api",
+        "//internal/audit",
         "//internal/auth",
         "//internal/auth/providers",
         "//internal/auth/userpasswd",
@@ -273,6 +274,7 @@ go_library(
         "//internal/embeddings/background/repo",
         "//internal/encryption",
         "//internal/encryption/keyring",
+        "//internal/endpoint",
         "//internal/env",
         "//internal/errcode",
         "//internal/executor",
@@ -379,6 +381,8 @@ go_library(
         "@com_github_sourcegraph_zoekt//stream",
         "@com_github_stretchr_testify//require",
         "@com_github_throttled_throttled_v2//:throttled",
+        "@io_k8s_apimachinery//pkg/apis/meta/v1:meta",
+        "@io_k8s_apimachinery//pkg/types",
         "@io_opentelemetry_go_otel//:otel",
         "@io_opentelemetry_go_otel//attribute",
     ],

cmd/frontend/graphqlbackend/site.go

@@ -167,7 +167,7 @@ func (r *siteResolver) SettingsURL() *string { return strptr("/site-admin/global
 
 func (r *siteResolver) CanReloadSite(ctx context.Context) bool {
 	err := auth.CheckCurrentUserIsSiteAdmin(ctx, r.db)
-	return canReloadSite && err == nil
+	return isGoremanSite && err == nil
 }
 
 func (r *siteResolver) BuildVersion() string { return version.Version() }

cmd/frontend/graphqlbackend/site_reload.go

@@ -2,29 +2,70 @@ package graphqlbackend
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	"github.com/inconshreveable/log15" //nolint:logging // TODO move all logging to sourcegraph/log
+	"github.com/sourcegraph/log"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	k8stypes "k8s.io/apimachinery/pkg/types"
 
 	"github.com/sourcegraph/sourcegraph/cmd/frontend/internal/processrestart"
 	"github.com/sourcegraph/sourcegraph/internal/actor"
+	"github.com/sourcegraph/sourcegraph/internal/audit"
 	"github.com/sourcegraph/sourcegraph/internal/auth"
+	"github.com/sourcegraph/sourcegraph/internal/cloud"
+	"github.com/sourcegraph/sourcegraph/internal/endpoint"
+	"github.com/sourcegraph/sourcegraph/internal/env"
 	"github.com/sourcegraph/sourcegraph/lib/errors"
 )
 
 // canReloadSite is whether the current site can be reloaded via the API. Currently
 // only goreman-managed sites can be reloaded. Callers must also check if the actor
 // is an admin before actually reloading the site.
-var canReloadSite = processrestart.CanRestart()
+var isGoremanSite = processrestart.CanRestart()
+
+// SRC_ENABLE_FRONTEND_SITE_RELOAD is env
+var enableFrontendSiteReload = env.MustGetBool("SRC_ENABLE_FRONTEND_SITE_RELOAD", true, "Enables the /reload-site endpoint for reloading the site")
 
 func (r *schemaResolver) ReloadSite(ctx context.Context) (*EmptyResponse, error) {
-	// 🚨 SECURITY: Reloading the site is an interruptive action, so only admins
+	// 🚨 SECURITY: Reloading the site is an disruptive action, so only admins
 	// may do it.
 	if err := auth.CheckCurrentUserIsSiteAdmin(ctx, r.db); err != nil {
 		return nil, err
 	}
 
-	if !canReloadSite {
+	if cloud.SiteConfig().SourcegraphOperatorAuthProviderEnabled() && enableFrontendSiteReload {
+		// use k8s client to restart the frontend deployment rollout
+		client, err := endpoint.LoadClient()
+		if err != nil {
+			return nil, err
+		}
+		ns := endpoint.Namespace(r.logger)
+		data := fmt.Sprintf(`{"spec": {"template": {"metadata": {"annotations": {"kubectl.kubernetes.io/restartedAt": "%s", "kubernetes.io/change-cause: "frontend restart requested"}}}}}`, time.Now().Format("20060102150405"))
+		deploymentClient := client.AppsV1().Deployments(ns)
+
+		currentUser, err := CurrentUser(ctx, r.db)
+		if err != nil {
+			return nil, err
+		}
+		audit.Log(ctx, r.logger, audit.Record{
+			Entity: "GraphQL",
+			Action: "frontend-reload",
+			Fields: []log.Field{
+				log.String("currentUser", currentUser.user.Username),
+			},
+		})
+		r.logger.Info("Restarting k8s deployment")
+		_, err = deploymentClient.Patch(ctx, "sourcegraph-frontend",
+			k8stypes.StrategicMergePatchType, []byte(data), metav1.PatchOptions{})
+		if err != nil {
+			return nil, err
+		}
+		return &EmptyResponse{}, nil
+	}
+
+	if !isGoremanSite {
 		return nil, errors.New("reloading site is not supported")
 	}
 

internal/endpoint/endpoint.go

@@ -49,7 +49,7 @@ type endpoints struct {
 // New creates a new Map for the URL specifier.
 //
 // If the scheme is prefixed with "k8s+", one URL is expected and the format is
-// expected to match e.g. k8s+http://service.namespace:port/path. namespace,
+// expected to match e.g. k8s+http://service.namespace:port/path. Namespace,
 // port and path are optional. URLs of this form will consistently hash among
 // the endpoints for the Kubernetes service. The values returned by Get will
 // look like http://endpoint:port/path.

internal/endpoint/k8s.go

@@ -27,7 +27,7 @@ func K8S(logger log.Logger, urlspec string) *Map {
 	logger = logger.Scoped("k8s")
 	return &Map{
 		urlspec:   urlspec,
-		discofunk: k8sDiscovery(logger, urlspec, namespace(logger), loadClient),
+		discofunk: k8sDiscovery(logger, urlspec, Namespace(logger), LoadClient),
 	}
 }
 
@@ -189,10 +189,10 @@ func parseURL(rawurl string) (*k8sURL, error) {
 	}, nil
 }
 
-// namespace returns the namespace the pod is currently running in
-// this is done because the k8s client we previously used set the namespace
+// Namespace returns the Namespace the pod is currently running in
+// this is done because the k8s client we previously used set the Namespace
 // when the client was created, the official k8s client does not
-func namespace(logger log.Logger) string {
+func Namespace(logger log.Logger) string {
 	logger = logger.Scoped("namespace")
 	const filename = "/var/run/secrets/kubernetes.io/serviceaccount/namespace"
 	data, err := os.ReadFile(filename)
@@ -209,7 +209,7 @@ func namespace(logger log.Logger) string {
 	return ns
 }
 
-func loadClient() (client *kubernetes.Clientset, err error) {
+func LoadClient() (client *kubernetes.Clientset, err error) {
 	// Uncomment below to test against a real cluster. This is only important
 	// when you are changing how we interact with the k8s API and you want to
 	// test against the real thing.
@@ -226,7 +226,7 @@ func loadClient() (client *kubernetes.Clientset, err error) {
 		}
 		clientConfig := clientcmd.NewDefaultClientConfig(*c, nil)
 		config, err = clientConfig.ClientConfig()
-		namespace = "prod"
+		Namespace = "prod"
 	*/
 
 	config, err := rest.InClusterConfig()