Add test for metricbeat monitoring for ES (#77768)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/test/stack_functional_integration/configs/tests_list.js

@@ -46,10 +46,14 @@ export default (envObj) => {
 
   if (envObj.XPACK === 'YES' && ['TRIAL', 'GOLD', 'PLATINUM'].includes(envObj.LICENSE)) {
     // we can't test enabling monitoring on this config because we already enable it through cluster settings for both clusters.
-    if (envObj.VM !== 'ubuntu16_tar_ccs') {
+    if (envObj.VM !== 'ubuntu16_tar_ccs' && envObj.VM !== 'centos7_rpm') {
       // monitoring is last because we switch to the elastic superuser here
       xs.push('monitoring');
     }
+    if (envObj.VM === 'centos7_rpm') {
+      // monitoring is last because we switch to the elastic superuser here
+      xs.push('monitoring/_monitoring_metricbeat');
+    }
   }
 
   return xs;

x-pack/test/stack_functional_integration/test/functional/apps/monitoring/_monitoring_metricbeat.js

@@ -0,0 +1,39 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+export default ({ getService, getPageObjects }) => {
+  describe('monitoring app - stack functional integration - suite', () => {
+    const browser = getService('browser');
+    const PageObjects = getPageObjects(['security', 'monitoring', 'common']);
+    const log = getService('log');
+    const testSubjects = getService('testSubjects');
+    const isSaml = !!process.env.VM.includes('saml') || !!process.env.VM.includes('oidc');
+
+    before(async () => {
+      await browser.setWindowSize(1200, 800);
+      if (process.env.SECURITY === 'YES' && !isSaml) {
+        await PageObjects.security.logout();
+        log.debug('### log in as elastic superuser to enable monitoring');
+        // Tests may be running as a non-superuser like `power` but that user
+        // doesn't have the cluster privs to enable monitoring.
+        // On the SAML config, this will fail, but the test recovers on the next
+        // navigate and logs in as the saml user.
+      }
+      // navigateToApp without a username and password will default to the superuser
+      await PageObjects.common.navigateToApp('monitoring', { insertTimestamp: false });
+    });
+
+    it('should have Monitoring already enabled', async () => {
+      await testSubjects.click('esOverview');
+    });
+
+    after(async () => {
+      if (process.env.SECURITY === 'YES' && !isSaml) {
+        await PageObjects.security.forceLogout(isSaml);
+      }
+    });
+  });
+};