Grant kibana_system user to read from Endpoint metrics datastream (telemetry). (#74340)

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/security/authz/store/ReservedRolesStore.java

@@ -188,6 +188,10 @@ public class ReservedRolesStore implements BiConsumer<Set<String>, ActionListene
                                 // Endpoint / Fleet policy responses. Kibana requires read access to send telemetry
                                 RoleDescriptor.IndicesPrivileges.builder()
                                     .indices("metrics-endpoint.policy-*")
+                                    .privileges("read").build(),
+                                // Endpoint metrics. Kibana requires read access to send telemetry
+                                RoleDescriptor.IndicesPrivileges.builder()
+                                    .indices("metrics-endpoint.metrics-*")
                                     .privileges("read").build()
                         },
                         null,

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/authz/store/ReservedRolesStoreTests.java

@@ -546,6 +546,22 @@ public class ReservedRolesStoreTests extends ESTestCase {
             assertThat(kibanaRole.indices().allowedIndicesMatcher(READ_CROSS_CLUSTER_NAME).test(mockIndexAbstraction(index)), is(false));
         });
 
+        // read-only datastream for Endpoint metrics
+        Arrays.asList("metrics-endpoint.metrics-" + randomAlphaOfLength(randomIntBetween(0, 13))).forEach((index) -> {
+            assertThat(kibanaRole.indices().allowedIndicesMatcher("indices:foo").test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher("indices:bar").test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(DeleteIndexAction.NAME).test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(GetIndexAction.NAME).test(mockIndexAbstraction(index)), is(true));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(CreateIndexAction.NAME).test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(IndexAction.NAME).test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(DeleteAction.NAME).test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(UpdateSettingsAction.NAME).test(mockIndexAbstraction(index)), is(false));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(SearchAction.NAME).test(mockIndexAbstraction(index)), is(true));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(MultiSearchAction.NAME).test(mockIndexAbstraction(index)), is(true));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(GetAction.NAME).test(mockIndexAbstraction(index)), is(true));
+            assertThat(kibanaRole.indices().allowedIndicesMatcher(READ_CROSS_CLUSTER_NAME).test(mockIndexAbstraction(index)), is(false));
+        });
+
         // Beats management index
         final String index = ".management-beats";
         assertThat(kibanaRole.indices().allowedIndicesMatcher("indices:foo").test(mockIndexAbstraction(index)), is(false));