Expose client tools auto update for find endpoint (#46785)

* Expose client tools auto update for find endpoint

* Group auto update settings in find response
Log error instead returning error
Add tests auto update settings in find endpoint
Add check for not implemented error

* Add more test cases

api/client/webclient/webclient.go

@@ -297,6 +297,8 @@ type PingResponse struct {
 	ServerVersion string `json:"server_version"`
 	// MinClientVersion is the minimum client version required by the server.
 	MinClientVersion string `json:"min_client_version"`
+	// AutoUpdateSettings contains the auto update settings.
+	AutoUpdate AutoUpdateSettings `json:"auto_update"`
 	// ClusterName contains the name of the Teleport cluster.
 	ClusterName string `json:"cluster_name"`
 
@@ -328,6 +330,14 @@ type ProxySettings struct {
 	TLSRoutingEnabled bool `json:"tls_routing_enabled"`
 }
 
+// AutoUpdateSettings contains information about the auto update requirements.
+type AutoUpdateSettings struct {
+	// ToolsVersion defines the version of {tsh, tctl} for client auto update.
+	ToolsVersion string `json:"tools_version"`
+	// ToolsAutoUpdate enables client auto update feature.
+	ToolsAutoUpdate bool `json:"tools_auto_update"`
+}
+
 // KubeProxySettings is kubernetes proxy settings
 type KubeProxySettings struct {
 	// Enabled is true when kubernetes proxy is enabled

lib/web/apiserver.go

@@ -1520,7 +1520,7 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request, p httprouter.Para
 	if err != nil {
 		return nil, trace.Wrap(err)
 	}
-	return webclient.PingResponse{
+	response := webclient.PingResponse{
 		Auth: webclient.AuthenticationSettings{
 			// Nodes need the signature algorithm suite when joining to generate
 			// keys with the correct algorithm.
@@ -1530,7 +1530,25 @@ func (h *Handler) find(w http.ResponseWriter, r *http.Request, p httprouter.Para
 		ServerVersion:    teleport.Version,
 		MinClientVersion: teleport.MinClientVersion,
 		ClusterName:      h.auth.clusterName,
-	}, nil
+	}
+
+	autoUpdateConfig, err := h.cfg.AccessPoint.GetAutoUpdateConfig(r.Context())
+	// TODO(vapopov) DELETE IN v18.0.0 check of IsNotImplemented, must be backported to all latest supported versions.
+	if err != nil && !trace.IsNotFound(err) && !trace.IsNotImplemented(err) {
+		h.logger.ErrorContext(r.Context(), "failed to receive AutoUpdateConfig", "error", err)
+	} else if err == nil {
+		response.AutoUpdate.ToolsAutoUpdate = autoUpdateConfig.GetSpec().GetToolsAutoupdate()
+	}
+
+	autoUpdateVersion, err := h.cfg.AccessPoint.GetAutoUpdateVersion(r.Context())
+	// TODO(vapopov) DELETE IN v18.0.0 check of IsNotImplemented, must be backported to all latest supported versions.
+	if err != nil && !trace.IsNotFound(err) && !trace.IsNotImplemented(err) {
+		h.logger.ErrorContext(r.Context(), "failed to receive AutoUpdateVersion", "error", err)
+	} else if err == nil {
+		response.AutoUpdate.ToolsVersion = autoUpdateVersion.GetSpec().GetToolsVersion()
+	}
+
+	return response, nil
 }
 
 func (h *Handler) pingWithConnector(w http.ResponseWriter, r *http.Request, p httprouter.Params) (interface{}, error) {

lib/web/apiserver_ping_test.go

@@ -26,12 +26,15 @@ import (
 	"testing"
 
 	"github.com/gravitational/roundtrip"
+	"github.com/gravitational/trace"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
 	"github.com/gravitational/teleport/api/client/webclient"
 	"github.com/gravitational/teleport/api/constants"
+	autoupdatev1pb "github.com/gravitational/teleport/api/gen/proto/go/teleport/autoupdate/v1"
 	"github.com/gravitational/teleport/api/types"
+	"github.com/gravitational/teleport/api/types/autoupdate"
 	"github.com/gravitational/teleport/lib/client"
 	"github.com/gravitational/teleport/lib/modules"
 )
@@ -244,5 +247,86 @@ func TestPing_minimalAPI(t *testing.T) {
 			require.NoError(t, resp.Body.Close())
 		})
 	}
+}
+
+// TestPing_autoUpdateResources tests that find endpoint return correct data related to auto updates.
+func TestPing_autoUpdateResources(t *testing.T) {
+	env := newWebPack(t, 1, func(cfg *proxyConfig) {
+		cfg.minimalHandler = true
+	})
+	proxy := env.proxies[0]
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	req, err := http.NewRequest(http.MethodGet, proxy.newClient(t).Endpoint("webapi", "find"), nil)
+	require.NoError(t, err)
+	req.Host = proxy.handler.handler.cfg.ProxyPublicAddrs[0].Host()
+
+	tests := []struct {
+		name     string
+		config   *autoupdatev1pb.AutoUpdateConfigSpec
+		version  *autoupdatev1pb.AutoUpdateVersionSpec
+		cleanup  bool
+		expected webclient.AutoUpdateSettings
+	}{
+		{
+			name:     "resources not defined",
+			expected: webclient.AutoUpdateSettings{},
+		},
+		{
+			name:     "enable auto update",
+			config:   &autoupdatev1pb.AutoUpdateConfigSpec{ToolsAutoupdate: true},
+			expected: webclient.AutoUpdateSettings{ToolsAutoUpdate: true},
+			cleanup:  true,
+		},
+		{
+			name:     "set auto update version",
+			version:  &autoupdatev1pb.AutoUpdateVersionSpec{ToolsVersion: "1.2.3"},
+			expected: webclient.AutoUpdateSettings{ToolsVersion: "1.2.3"},
+			cleanup:  true,
+		},
+		{
+			name:     "enable auto update and set version",
+			config:   &autoupdatev1pb.AutoUpdateConfigSpec{ToolsAutoupdate: true},
+			version:  &autoupdatev1pb.AutoUpdateVersionSpec{ToolsVersion: "1.2.3"},
+			expected: webclient.AutoUpdateSettings{ToolsAutoUpdate: true, ToolsVersion: "1.2.3"},
+		},
+		{
+			name:     "modify auto update config and version",
+			config:   &autoupdatev1pb.AutoUpdateConfigSpec{ToolsAutoupdate: false},
+			version:  &autoupdatev1pb.AutoUpdateVersionSpec{ToolsVersion: "3.2.1"},
+			expected: webclient.AutoUpdateSettings{ToolsAutoUpdate: false, ToolsVersion: "3.2.1"},
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			if tc.config != nil {
+				config, err := autoupdate.NewAutoUpdateConfig(tc.config)
+				require.NoError(t, err)
+				_, err = env.server.Auth().UpsertAutoUpdateConfig(ctx, config)
+				require.NoError(t, err)
+			}
+			if tc.version != nil {
+				version, err := autoupdate.NewAutoUpdateVersion(tc.version)
+				require.NoError(t, err)
+				_, err = env.server.Auth().UpsertAutoUpdateVersion(ctx, version)
+				require.NoError(t, err)
+			}
 
+			resp, err := client.NewInsecureWebClient().Do(req)
+			require.NoError(t, err)
+
+			pr := &webclient.PingResponse{}
+			require.NoError(t, json.NewDecoder(resp.Body).Decode(pr))
+			require.NoError(t, resp.Body.Close())
+
+			assert.Equal(t, tc.expected, pr.AutoUpdate)
+
+			if tc.cleanup {
+				require.NotErrorIs(t, env.server.Auth().DeleteAutoUpdateConfig(ctx), &trace.NotFoundError{})
+				require.NotErrorIs(t, env.server.Auth().DeleteAutoUpdateVersion(ctx), &trace.NotFoundError{})
+			}
+		})
+	}
 }