Add missing APM entitlements (elastic#123462) (elastic#123963)

Author: ldematte

libs/entitlement/src/main/java/org/elasticsearch/entitlement/initialization/EntitlementInitialization.java

@@ -34,6 +34,7 @@
 import org.elasticsearch.entitlement.runtime.policy.entitlements.OutboundNetworkEntitlement;
 import org.elasticsearch.entitlement.runtime.policy.entitlements.ReadStoreAttributesEntitlement;
 import org.elasticsearch.entitlement.runtime.policy.entitlements.SetHttpsConnectionPropertiesEntitlement;
+import org.elasticsearch.entitlement.runtime.policy.entitlements.WriteSystemPropertiesEntitlement;
 
 import java.lang.instrument.Instrumentation;
 import java.lang.reflect.Constructor;
@@ -262,15 +263,17 @@ private static PolicyManager createPolicyManager() {
         var serverPolicy = new Policy("server", serverScopes);
         // agents run without a module, so this is a special hack for the apm agent
         // this should be removed once https://github.com/elastic/elasticsearch/issues/109335 is completed
+        // See also modules/apm/src/main/plugin-metadata/entitlement-policy.yaml
         List<Entitlement> agentEntitlements = List.of(
             new CreateClassLoaderEntitlement(),
             new ManageThreadsEntitlement(),
             new SetHttpsConnectionPropertiesEntitlement(),
             new OutboundNetworkEntitlement(),
+            new WriteSystemPropertiesEntitlement(Set.of("AsyncProfiler.safemode")),
+            new LoadNativeLibrariesEntitlement(),
             new FilesEntitlement(
                 List.of(
-                    FileData.ofPath(Path.of("/co/elastic/apm/agent/"), READ),
-                    FileData.ofPath(Path.of("/agent/co/elastic/apm/agent/"), READ),
+                    FileData.ofPath(bootstrapArgs.logsDir(), READ_WRITE),
                     FileData.ofPath(Path.of("/proc/meminfo"), READ),
                     FileData.ofPath(Path.of("/sys/fs/cgroup/"), READ)
                 )

modules/apm/src/main/plugin-metadata/entitlement-policy.yaml

@@ -83,9 +83,3 @@ org.elasticsearch.telemetry.apm:
         - elastic.apm.application_packages
         - elastic.apm.stack_trace_limit
         - elastic.apm.span_stack_trace_min_duration
-elastic.apm.agent:
-  - set_https_connection_properties
-  - write_system_properties:
-      properties:
-        - AsyncProfiler.safemode
-  - load_native_libraries