Closes elastic#77695.

Adds new configuration 'xpack.apm.ui.maxServiceEnvironments' to set the
max number of service environments visible in APM UI.

docs/settings/apm-settings.asciidoc

@@ -49,6 +49,9 @@ Changing these settings may disable features of the APM App.
 | `xpack.apm.ui.transactionGroupBucketSize`
   | Number of top transaction groups displayed in the APM app. Defaults to `1000`.
 
+| `xpack.apm.ui.maxServiceEnvironments`
+  | Maximum number of unique service environments recognized by the UI. Defaults to `100`.
+
 | `xpack.apm.ui.maxTraceItems` {ess-icon}
   | Maximum number of child items displayed when viewing trace details. Defaults to `1000`.
 

x-pack/plugins/apm/server/index.ts

@@ -29,6 +29,7 @@ export const config = {
     ui: schema.object({
       enabled: schema.boolean({ defaultValue: true }),
       transactionGroupBucketSize: schema.number({ defaultValue: 1000 }),
+      maxServiceEnvironments: schema.number({ defaultValue: 100 }),
       maxTraceItems: schema.number({ defaultValue: 1000 }),
     }),
     searchAggregatedTransactions: schema.oneOf(
@@ -74,6 +75,7 @@ export function mergeConfigs(
     'xpack.apm.serviceMapMaxTracesPerRequest':
       apmConfig.serviceMapMaxTracesPerRequest,
     'xpack.apm.ui.enabled': apmConfig.ui.enabled,
+    'xpack.apm.ui.maxServiceEnvironments': apmConfig.ui.maxServiceEnvironments,
     'xpack.apm.ui.maxTraceItems': apmConfig.ui.maxTraceItems,
     'xpack.apm.ui.transactionGroupBucketSize':
       apmConfig.ui.transactionGroupBucketSize,

x-pack/plugins/apm/server/lib/alerts/register_error_count_alert_type.ts

@@ -66,6 +66,8 @@ export function registerErrorCountAlertType({
         config,
         savedObjectsClient: services.savedObjectsClient,
       });
+      const maxServiceEnvironments =
+        config['xpack.apm.ui.maxServiceEnvironments'];
 
       const searchParams = {
         index: indices['apm_oss.errorIndices'],
@@ -100,6 +102,7 @@ export function registerErrorCountAlertType({
                 environments: {
                   terms: {
                     field: SERVICE_ENVIRONMENT,
+                    size: maxServiceEnvironments,
                   },
                 },
               },

x-pack/plugins/apm/server/lib/alerts/register_transaction_duration_alert_type.ts

@@ -75,6 +75,8 @@ export function registerTransactionDurationAlertType({
         config,
         savedObjectsClient: services.savedObjectsClient,
       });
+      const maxServiceEnvironments =
+        config['xpack.apm.ui.maxServiceEnvironments'];
 
       const searchParams = {
         index: indices['apm_oss.transactionIndices'],
@@ -112,6 +114,7 @@ export function registerTransactionDurationAlertType({
             environments: {
               terms: {
                 field: SERVICE_ENVIRONMENT,
+                size: maxServiceEnvironments,
               },
             },
           },

x-pack/plugins/apm/server/lib/alerts/register_transaction_error_rate_alert_type.ts

@@ -71,6 +71,8 @@ export function registerTransactionErrorRateAlertType({
         config,
         savedObjectsClient: services.savedObjectsClient,
       });
+      const maxServiceEnvironments =
+        config['xpack.apm.ui.maxServiceEnvironments'];
 
       const searchParams = {
         index: indices['apm_oss.transactionIndices'],
@@ -120,6 +122,7 @@ export function registerTransactionErrorRateAlertType({
                     environments: {
                       terms: {
                         field: SERVICE_ENVIRONMENT,
+                        size: maxServiceEnvironments,
                       },
                     },
                   },

x-pack/plugins/apm/server/lib/environments/get_all_environments.ts

@@ -24,7 +24,8 @@ export async function getAllEnvironments({
   searchAggregatedTransactions: boolean;
   includeMissing?: boolean;
 }) {
-  const { apmEventClient } = setup;
+  const { apmEventClient, config } = setup;
+  const maxServiceEnvironments = config['xpack.apm.ui.maxServiceEnvironments'];
 
   // omit filter for service.name if "All" option is selected
   const serviceNameFilter = serviceName
@@ -55,7 +56,7 @@ export async function getAllEnvironments({
         environments: {
           terms: {
             field: SERVICE_ENVIRONMENT,
-            size: 100,
+            size: maxServiceEnvironments,
             ...(!serviceName ? { min_doc_count: 0 } : {}),
             missing: includeMissing ? ENVIRONMENT_NOT_DEFINED.value : undefined,
           },

x-pack/plugins/apm/server/lib/service_map/get_trace_sample_ids.ts

@@ -58,6 +58,8 @@ export async function getTraceSampleIds({
     ? config['xpack.apm.serviceMapTraceIdBucketSize']
     : config['xpack.apm.serviceMapTraceIdGlobalBucketSize'];
 
+  const maxServiceEnvironments = config['xpack.apm.ui.maxServiceEnvironments'];
+
   const samplerShardSize = traceIdBucketSize * 10;
 
   const params = {
@@ -90,6 +92,7 @@ export async function getTraceSampleIds({
                   terms: {
                     field: SERVICE_ENVIRONMENT,
                     missing_bucket: true,
+                    size: maxServiceEnvironments,
                   },
                 },
               },

x-pack/plugins/apm/server/lib/services/get_services/get_services_items_stats.ts

@@ -337,7 +337,8 @@ export const getEnvironments = async ({
   setup,
   projection,
 }: AggregationParams) => {
-  const { apmEventClient } = setup;
+  const { apmEventClient, config } = setup;
+  const maxServiceEnvironments = config['xpack.apm.ui.maxServiceEnvironments'];
   const response = await apmEventClient.search(
     mergeProjection(projection, {
       body: {
@@ -352,6 +353,7 @@ export const getEnvironments = async ({
               environments: {
                 terms: {
                   field: SERVICE_ENVIRONMENT,
+                  size: maxServiceEnvironments,
                 },
               },
             },

x-pack/plugins/apm/server/lib/settings/agent_configuration/get_environments/get_existing_environments_for_service.ts

@@ -18,7 +18,8 @@ export async function getExistingEnvironmentsForService({
   serviceName: string | undefined;
   setup: Setup;
 }) {
-  const { internalClient, indices } = setup;
+  const { internalClient, indices, config } = setup;
+  const maxServiceEnvironments = config['xpack.apm.ui.maxServiceEnvironments'];
 
   const bool = serviceName
     ? { filter: [{ term: { [SERVICE_NAME]: serviceName } }] }
@@ -34,7 +35,7 @@ export async function getExistingEnvironmentsForService({
           terms: {
             field: SERVICE_ENVIRONMENT,
             missing: ALL_OPTION_VALUE,
-            size: 50,
+            size: maxServiceEnvironments,
           },
         },
       },

x-pack/plugins/apm/server/lib/ui_filters/get_environments.ts

@@ -24,7 +24,7 @@ export async function getEnvironments({
   serviceName?: string;
   searchAggregatedTransactions: boolean;
 }) {
-  const { start, end, apmEventClient } = setup;
+  const { start, end, apmEventClient, config } = setup;
 
   const filter: ESFilter[] = [{ range: rangeFilter(start, end) }];
 
@@ -34,6 +34,8 @@ export async function getEnvironments({
     });
   }
 
+  const maxServiceEnvironments = config['xpack.apm.ui.maxServiceEnvironments'];
+
   const params = {
     apm: {
       events: [
@@ -56,6 +58,7 @@ export async function getEnvironments({
           terms: {
             field: SERVICE_ENVIRONMENT,
             missing: ENVIRONMENT_NOT_DEFINED.value,
+            size: maxServiceEnvironments,
           },
         },
       },

x-pack/plugins/apm/server/utils/test_helpers.tsx

@@ -76,6 +76,9 @@ export async function inspectSearchParams(
 
             case 'xpack.apm.metricsInterval':
               return 30;
+
+            case 'xpack.apm.ui.maxServiceEnvironments':
+              return 100;
           }
         },
       }