aws-greengrass · limingyaoo · Oct 14, 2025 · Sep 25, 2025
diff --git a/...java/com/aws/greengrass/integrationtests/deployment/DeploymentServiceIntegrationTest.java b/...java/com/aws/greengrass/integrationtests/deployment/DeploymentServiceIntegrationTest.java
@@ -34,10 +34,10 @@
 import com.aws.greengrass.util.Coerce;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.commons.lang3.SystemUtils;
 import org.hamcrest.collection.IsMapContaining;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledOnOs;
 import org.junit.jupiter.api.condition.OS;
@@ -85,6 +85,7 @@
 import static org.hamcrest.Matchers.equalTo;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.when;
 
@@ -325,10 +326,10 @@ void GIVEN_deployment_with_large_config_WHEN_receives_deployment_THEN_deployment
         assertThat(resultConfig, IsMapContaining.hasEntry("willBeNullKey", null));
     }
 
-    @Disabled
     @Test
     @EnabledOnOs(OS.LINUX)
     void GIVEN_deployment_with_system_resource_WHEN_receives_deployment_THEN_deployment_succeeds() throws Exception {
+        assumeTrue("root".equals(SystemUtils.USER_NAME), "Test requires root access for cgroup management");
         CountDownLatch deploymentFinished = new CountDownLatch(1);
         Consumer<GreengrassLogMessage> listener = m -> {
             if (m.getMessage() != null) {

diff --git a/...ts/java/com/aws/greengrass/integrationtests/deployment/DeploymentTaskIntegrationTest.java b/...ts/java/com/aws/greengrass/integrationtests/deployment/DeploymentTaskIntegrationTest.java
@@ -46,14 +46,14 @@
 import com.fasterxml.jackson.databind.MapperFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.vdurmont.semver4j.Semver;
+import org.apache.commons.lang3.SystemUtils;
 import org.hamcrest.Matchers;
 import org.hamcrest.collection.IsMapContaining;
 import org.hamcrest.collection.IsMapWithSize;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.MethodOrderer;
 import org.junit.jupiter.api.Order;
 import org.junit.jupiter.api.Test;
@@ -126,6 +126,7 @@
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 @SuppressWarnings("PMD.ExcessiveClassLength")
@@ -871,10 +872,10 @@ void GIVEN_services_running_WHEN_service_added_and_deleted_THEN_add_remove_servi
      * Start a service running with a user, then deploy an update to change the user and ensure the correct user stops
      * the process and starts the new one.
      */
-    @Disabled
     @Test
     @Order(9) // deploy before tests that break services
     void GIVEN_a_deployment_with_runwith_config_WHEN_submitted_THEN_runwith_updated() throws Exception {
+        assumeTrue("root".equals(SystemUtils.USER_NAME), "Test requires root access for cgroup management");
         ((Map) kernel.getContext().getvIfExists(Kernel.SERVICE_TYPE_TO_CLASS_MAP_KEY).get())
                 .put("plugin", GreengrassService.class.getName());
 

diff --git a/src/integrationtests/java/com/aws/greengrass/integrationtests/ipc/IPCHibernateTest.java b/src/integrationtests/java/com/aws/greengrass/integrationtests/ipc/IPCHibernateTest.java
@@ -9,42 +9,41 @@
 import com.aws.greengrass.lifecyclemanager.Kernel;
 import com.aws.greengrass.testcommons.testutilities.GGExtension;
 import com.aws.greengrass.testcommons.testutilities.TestUtils;
-import com.aws.greengrass.util.platforms.unix.linux.Cgroup;
-import com.aws.greengrass.util.platforms.unix.linux.LinuxSystemResourceController;
+import com.aws.greengrass.util.platforms.unix.linux.CgroupManager;
+import com.aws.greengrass.util.platforms.unix.linux.CgroupV1;
+import com.aws.greengrass.util.platforms.unix.linux.CgroupV2;
+import org.apache.commons.lang3.SystemUtils;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledOnOs;
 import org.junit.jupiter.api.condition.OS;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.extension.ExtensionContext;
 import org.junit.jupiter.api.io.TempDir;
+import org.mockito.junit.jupiter.MockitoExtension;
 import software.amazon.awssdk.aws.greengrass.GreengrassCoreIPCClient;
 import software.amazon.awssdk.aws.greengrass.model.PauseComponentRequest;
 import software.amazon.awssdk.aws.greengrass.model.ResumeComponentRequest;
 import software.amazon.awssdk.crt.io.SocketOptions;
 import software.amazon.awssdk.eventstreamrpc.EventStreamRPCConnection;
 
-import java.io.IOException;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.FileSystemException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Optional;
 import java.util.concurrent.TimeUnit;
 
 import static com.aws.greengrass.integrationtests.ipc.IPCTestUtils.prepareKernelFromConfigFile;
 import static com.aws.greengrass.testcommons.testutilities.ExceptionLogProtector.ignoreExceptionOfType;
 import static com.aws.greengrass.testcommons.testutilities.ExceptionLogProtector.ignoreExceptionUltimateCauseWithMessage;
 import static com.aws.greengrass.testcommons.testutilities.ExceptionLogProtector.ignoreExceptionWithMessage;
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.anyOf;
-import static org.hamcrest.Matchers.is;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
-@ExtendWith({GGExtension.class})
+@ExtendWith({GGExtension.class, MockitoExtension.class})
 class IPCHibernateTest {
     private static final String TARGET_COMPONENT_NAME = "HibernateTarget";
     private static final String CONTROLLER_COMPONENT_NAME = "HibernateController";
@@ -88,37 +87,35 @@ void beforeEach(ExtensionContext context) throws Exception {
         greengrassCoreIPCClient = new GreengrassCoreIPCClient(clientConnection);
     }
 
-    @Disabled
     @SuppressWarnings({"PMD.CloseResource", "PMD.AvoidCatchingGenericException"})
     @EnabledOnOs({OS.LINUX})
     @Test
     void GIVEN_LifeCycleEventStreamClient_WHEN_pause_resume_component_THEN_target_service_paused_and_resumed()
             throws Exception {
+        // Skip test if not running as root (required for cgroup access)
+        assumeTrue("root".equals(SystemUtils.USER_NAME), "Test requires root access for cgroup management");
+
         GenericExternalService component = (GenericExternalService) kernel.locate(TARGET_COMPONENT_NAME);
 
         PauseComponentRequest pauseRequest = new PauseComponentRequest();
         pauseRequest.setComponentName(TARGET_COMPONENT_NAME);
         greengrassCoreIPCClient.pauseComponent(pauseRequest, Optional.empty()).getResponse().get(5, TimeUnit.SECONDS);
 
         assertTrue(component.isPaused());
-        assertThat(getCgroupFreezerState(component.getServiceName()),
-                anyOf(is(LinuxSystemResourceController.CgroupFreezerState.FROZEN),
-                        is(LinuxSystemResourceController.CgroupFreezerState.FREEZING)));
+
+        CgroupManager freezerManager = isCgroupV2Supported() ? CgroupV2.Freezer : CgroupV1.Freezer;
+        assertTrue(freezerManager.isComponentFrozen(TARGET_COMPONENT_NAME));
 
         ResumeComponentRequest resumeRequest = new ResumeComponentRequest();
         resumeRequest.setComponentName(TARGET_COMPONENT_NAME);
         greengrassCoreIPCClient.resumeComponent(resumeRequest, Optional.empty()).getResponse().get(5, TimeUnit.SECONDS);
 
         assertFalse(component.isPaused());
-        assertThat(getCgroupFreezerState(component.getServiceName()),
-                is(LinuxSystemResourceController.CgroupFreezerState.THAWED));
+        assertFalse(freezerManager.isComponentFrozen(TARGET_COMPONENT_NAME));
     }
 
-    private LinuxSystemResourceController.CgroupFreezerState getCgroupFreezerState(String serviceName)
-            throws IOException {
-        return LinuxSystemResourceController.CgroupFreezerState.valueOf(
-                new String(Files.readAllBytes(Cgroup.Freezer.getCgroupFreezerStateFilePath(serviceName)),
-                        StandardCharsets.UTF_8).trim());
+    private boolean isCgroupV2Supported() {
+        return Files.exists(Paths.get("/sys/fs/cgroup/cgroup.controllers"));
     }
 }
 
diff --git a/...com/aws/greengrass/integrationtests/lifecyclemanager/GenericExternalServiceIntegTest.java b/...com/aws/greengrass/integrationtests/lifecyclemanager/GenericExternalServiceIntegTest.java
@@ -18,27 +18,31 @@
 import com.aws.greengrass.logging.impl.GreengrassLogMessage;
 import com.aws.greengrass.logging.impl.Slf4jLogAdapter;
 import com.aws.greengrass.status.model.ComponentStatusDetails;
+import com.aws.greengrass.testcommons.testutilities.GGExtension;
 import com.aws.greengrass.testcommons.testutilities.NoOpPathOwnershipHandler;
 import com.aws.greengrass.util.Pair;
-import com.aws.greengrass.util.platforms.unix.linux.Cgroup;
-import com.aws.greengrass.util.platforms.unix.linux.LinuxSystemResourceController;
+import com.aws.greengrass.util.platforms.unix.linux.CgroupManager;
+import com.aws.greengrass.util.platforms.unix.linux.CgroupV1;
+import com.aws.greengrass.util.platforms.unix.linux.CgroupV2;
 import org.apache.commons.lang3.SystemUtils;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledOnOs;
 import org.junit.jupiter.api.condition.OS;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.extension.ExtensionContext;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.mockito.junit.jupiter.MockitoExtension;
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.FileSystemException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
@@ -64,7 +68,6 @@
 import static com.aws.greengrass.testcommons.testutilities.TestUtils.createCloseableLogListener;
 import static com.aws.greengrass.util.platforms.unix.UnixPlatform.STDOUT;
 import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.anyOf;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
@@ -83,7 +86,7 @@
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
-
+@ExtendWith({GGExtension.class, MockitoExtension.class})
 class GenericExternalServiceIntegTest extends BaseITCase {
 
     private Kernel kernel;
@@ -581,7 +584,6 @@ void GIVEN_bootstrap_command_WHEN_runs_longer_than_5_sec_THEN_timeout_exception_
         assertThrows(TimeoutException.class, serviceWithJustBootstrapAndShouldTimeout::bootstrap);
     }
 
-    @Disabled
     @EnabledOnOs({OS.LINUX, OS.MAC})
     @ParameterizedTest
     @MethodSource("posixTestUserConfig")
@@ -637,10 +639,12 @@ void GIVEN_posix_default_user_WHEN_runs_THEN_runs_with_default_user(String file,
         }
     }
 
-    @Disabled
     @EnabledOnOs({OS.LINUX})
     @Test
     void GIVEN_linux_resource_limits_WHEN_it_changes_THEN_component_runs_with_new_resource_limits() throws Exception {
+        // Skip test if no proper access available (required for cgroup access)
+        assumeTrue("root".equals(SystemUtils.USER_NAME), "Test requires root access for cgroup management");
+
         String componentName = "echo_service";
         // Run with no resource limit
         ConfigPlatformResolver.initKernelWithMultiPlatformConfig(kernel,
@@ -818,20 +822,38 @@ void GIVEN_service_starts_up_WHEN_startup_times_out_THEN_timeout_error_code_pers
     }
 
     private void assertResourceLimits(String componentName, long memory, double cpus) throws Exception {
-        byte[] buf1 = Files.readAllBytes(Cgroup.Memory.getComponentMemoryLimitPath(componentName));
-        assertThat(memory, equalTo(Long.parseLong(new String(buf1, StandardCharsets.UTF_8).trim())));
-
-        byte[] buf2 = Files.readAllBytes(Cgroup.CPU.getComponentCpuQuotaPath(componentName));
-        byte[] buf3 = Files.readAllBytes(Cgroup.CPU.getComponentCpuPeriodPath(componentName));
-
-        int quota = Integer.parseInt(new String(buf2, StandardCharsets.UTF_8).trim());
-        int period = Integer.parseInt(new String(buf3, StandardCharsets.UTF_8).trim());
+        int quota;
+        int period;
+
+        if (isCgroupV2Supported()) {
+            byte[] buf1 = Files.readAllBytes(CgroupV2.Memory.getComponentMemoryLimitPath(componentName));
+            assertThat(memory, equalTo(Long.parseLong(new String(buf1, StandardCharsets.UTF_8).trim())));
+
+            byte[] buf2 = Files.readAllBytes(CgroupV2.CPU.getComponentCpuLimitPath(componentName));
+            String cpuMax = new String(buf2, StandardCharsets.UTF_8).trim();
+            String[] parts = cpuMax.split(" ");
+            quota = Integer.parseInt(parts[0]);
+            period = Integer.parseInt(parts[1]);
+        } else {
+            byte[] buf1 = Files.readAllBytes(CgroupV1.Memory.getComponentMemoryLimitPath(componentName));
+            assertThat(memory, equalTo(Long.parseLong(new String(buf1, StandardCharsets.UTF_8).trim())));
+
+            byte[] buf2 = Files.readAllBytes(CgroupV1.CPU.getComponentCpuQuotaPath(componentName));
+            byte[] buf3 = Files.readAllBytes(CgroupV1.CPU.getComponentCpuPeriodPath(componentName));
+
+            quota = Integer.parseInt(new String(buf2, StandardCharsets.UTF_8).trim());
+            period = Integer.parseInt(new String(buf3, StandardCharsets.UTF_8).trim());
+        }
+
         int expectedQuota = (int) (cpus * period);
         assertThat(expectedQuota, equalTo(quota));
     }
 
+    @Test
+    @EnabledOnOs({OS.LINUX})
     void GIVEN_running_service_WHEN_pause_resume_requested_THEN_pause_resume_Service_and_freeze_thaw_cgroup(
             ExtensionContext context) throws Exception {
+        assumeTrue("root".equals(SystemUtils.USER_NAME), "Test requires root access for cgroup management");
         ignoreExceptionOfType(context, FileSystemException.class);
         ConfigPlatformResolver.initKernelWithMultiPlatformConfig(kernel,
                 getClass().getResource("long_running_services.yaml"));
@@ -852,21 +874,17 @@ void GIVEN_running_service_WHEN_pause_resume_requested_THEN_pause_resume_Service
 
         component.pause();
         assertTrue(component.isPaused());
-        assertThat(getCgroupFreezerState(component.getServiceName()),
-                anyOf(is(LinuxSystemResourceController.CgroupFreezerState.FROZEN),
-                        is(LinuxSystemResourceController.CgroupFreezerState.FREEZING)));
+
+        // check if component is frozen
+        CgroupManager freezerManager = isCgroupV2Supported() ? CgroupV2.Freezer : CgroupV1.Freezer;
+        assertTrue(freezerManager.isComponentFrozen(component.getServiceName()));
 
         component.resume();
         assertFalse(component.isPaused());
-        assertThat(getCgroupFreezerState(component.getServiceName()),
-                is(LinuxSystemResourceController.CgroupFreezerState.THAWED));
+        assertFalse(freezerManager.isComponentFrozen(component.getServiceName()));
     }
 
-    // To be used on linux only
-    private LinuxSystemResourceController.CgroupFreezerState getCgroupFreezerState(String serviceName)
-            throws IOException {
-        return LinuxSystemResourceController.CgroupFreezerState
-                .valueOf(new String(Files.readAllBytes(Cgroup.Freezer.getCgroupFreezerStateFilePath(serviceName))
-                        , StandardCharsets.UTF_8).trim());
+    private boolean isCgroupV2Supported() {
+        return Files.exists(Paths.get("/sys/fs/cgroup/cgroup.controllers"));
     }
 }