YARN-6674 Add memory cgroup settings for opportunistic containers. (Miklos Szegedi via Haibo Chen)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsMemoryResourceHandlerImpl.java

@@ -25,7 +25,9 @@
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.api.records.ContainerId;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.security.ContainerTokenIdentifier;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperation;
 
@@ -46,6 +48,8 @@ public class CGroupsMemoryResourceHandlerImpl implements MemoryResourceHandler {
       CGroupsMemoryResourceHandlerImpl.class);
   private static final CGroupsHandler.CGroupController MEMORY =
       CGroupsHandler.CGroupController.MEMORY;
+  private static final int OPPORTUNISTIC_SWAPPINESS = 100;
+  private static final int OPPORTUNISTIC_SOFT_LIMIT = 0;
 
   private CGroupsHandler cGroupsHandler;
   private int swappiness = 0;
@@ -86,12 +90,14 @@ public List<PrivilegedOperation> bootstrap(Configuration conf)
     }
     float softLimitPerc = conf.getFloat(
         YarnConfiguration.NM_MEMORY_RESOURCE_CGROUPS_SOFT_LIMIT_PERCENTAGE,
-      YarnConfiguration.DEFAULT_NM_MEMORY_RESOURCE_CGROUPS_SOFT_LIMIT_PERCENTAGE);
+        YarnConfiguration.
+            DEFAULT_NM_MEMORY_RESOURCE_CGROUPS_SOFT_LIMIT_PERCENTAGE);
     softLimit = softLimitPerc / 100.0f;
     if (softLimitPerc < 0.0f || softLimitPerc > 100.0f) {
       throw new ResourceHandlerException(
           "Illegal value '" + softLimitPerc + "' "
-              + YarnConfiguration.NM_MEMORY_RESOURCE_CGROUPS_SOFT_LIMIT_PERCENTAGE
+              + YarnConfiguration.
+                NM_MEMORY_RESOURCE_CGROUPS_SOFT_LIMIT_PERCENTAGE
               + ". Value must be between 0 and 100.");
     }
     return null;
@@ -122,12 +128,23 @@ public List<PrivilegedOperation> preStart(Container container)
       cGroupsHandler.updateCGroupParam(MEMORY, cgroupId,
           CGroupsHandler.CGROUP_PARAM_MEMORY_HARD_LIMIT_BYTES,
           String.valueOf(containerHardLimit) + "M");
+      ContainerTokenIdentifier id = container.getContainerTokenIdentifier();
+      if (id != null && id.getExecutionType() ==
+          ExecutionType.OPPORTUNISTIC) {
+        cGroupsHandler.updateCGroupParam(MEMORY, cgroupId,
+            CGroupsHandler.CGROUP_PARAM_MEMORY_SOFT_LIMIT_BYTES,
+            String.valueOf(OPPORTUNISTIC_SOFT_LIMIT) + "M");
+        cGroupsHandler.updateCGroupParam(MEMORY, cgroupId,
+            CGroupsHandler.CGROUP_PARAM_MEMORY_SWAPPINESS,
+            String.valueOf(OPPORTUNISTIC_SWAPPINESS));
+      } else {
         cGroupsHandler.updateCGroupParam(MEMORY, cgroupId,
             CGroupsHandler.CGROUP_PARAM_MEMORY_SOFT_LIMIT_BYTES,
             String.valueOf(containerSoftLimit) + "M");
         cGroupsHandler.updateCGroupParam(MEMORY, cgroupId,
             CGroupsHandler.CGROUP_PARAM_MEMORY_SWAPPINESS,
             String.valueOf(swappiness));
+      }
     } catch (ResourceHandlerException re) {
       cGroupsHandler.deleteCGroup(MEMORY, cgroupId);
       LOG.warn("Could not update cgroup for container", re);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/TestCGroupsMemoryResourceHandlerImpl.java

@@ -20,8 +20,10 @@
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.api.records.ContainerId;
+import org.apache.hadoop.yarn.api.records.ExecutionType;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.security.ContainerTokenIdentifier;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperation;
 import org.junit.Before;
@@ -32,6 +34,9 @@
 
 import static org.mockito.Mockito.*;
 
+/**
+ * Unit test for CGroupsMemoryResourceHandlerImpl.
+ */
 public class TestCGroupsMemoryResourceHandlerImpl {
 
   private CGroupsHandler mockCGroupsHandler;
@@ -60,8 +65,7 @@ public void testBootstrap() throws Exception {
     try {
       cGroupsMemoryResourceHandler.bootstrap(conf);
       Assert.fail("Pmem check should not be allowed to run with cgroups");
-    }
+    } catch(ResourceHandlerException re) {
-    catch(ResourceHandlerException re) {
       // do nothing
     }
     conf.setBoolean(YarnConfiguration.NM_PMEM_CHECK_ENABLED, false);
@@ -69,8 +73,7 @@ public void testBootstrap() throws Exception {
     try {
       cGroupsMemoryResourceHandler.bootstrap(conf);
       Assert.fail("Vmem check should not be allowed to run with cgroups");
-    }
+    } catch(ResourceHandlerException re) {
-    catch(ResourceHandlerException re) {
       // do nothing
     }
   }
@@ -84,8 +87,7 @@ public void testSwappinessValues() throws Exception {
     try {
       cGroupsMemoryResourceHandler.bootstrap(conf);
       Assert.fail("Negative values for swappiness should not be allowed.");
-    }
+    } catch (ResourceHandlerException re) {
-    catch (ResourceHandlerException re) {
       // do nothing
     }
     try {
@@ -93,8 +95,7 @@ public void testSwappinessValues() throws Exception {
       cGroupsMemoryResourceHandler.bootstrap(conf);
       Assert.fail("Values greater than 100 for swappiness"
           + " should not be allowed.");
-    }
+    } catch (ResourceHandlerException re) {
-    catch (ResourceHandlerException re) {
       // do nothing
     }
     conf.setInt(YarnConfiguration.NM_MEMORY_RESOURCE_CGROUPS_SWAPPINESS, 60);
@@ -169,4 +170,32 @@ public void testPostComplete() throws Exception {
   public void testTeardown() throws Exception {
     Assert.assertNull(cGroupsMemoryResourceHandler.teardown());
   }
+
+  @Test
+  public void testOpportunistic() throws Exception {
+    Configuration conf = new YarnConfiguration();
+    conf.setBoolean(YarnConfiguration.NM_PMEM_CHECK_ENABLED, false);
+    conf.setBoolean(YarnConfiguration.NM_VMEM_CHECK_ENABLED, false);
+
+    cGroupsMemoryResourceHandler.bootstrap(conf);
+    ContainerTokenIdentifier tokenId = mock(ContainerTokenIdentifier.class);
+    when(tokenId.getExecutionType()).thenReturn(ExecutionType.OPPORTUNISTIC);
+    Container container = mock(Container.class);
+    String id = "container_01_01";
+    ContainerId mockContainerId = mock(ContainerId.class);
+    when(mockContainerId.toString()).thenReturn(id);
+    when(container.getContainerId()).thenReturn(mockContainerId);
+    when(container.getContainerTokenIdentifier()).thenReturn(tokenId);
+    when(container.getResource()).thenReturn(Resource.newInstance(1024, 2));
+    cGroupsMemoryResourceHandler.preStart(container);
+    verify(mockCGroupsHandler, times(1))
+        .updateCGroupParam(CGroupsHandler.CGroupController.MEMORY, id,
+            CGroupsHandler.CGROUP_PARAM_MEMORY_SOFT_LIMIT_BYTES, "0M");
+    verify(mockCGroupsHandler, times(1))
+        .updateCGroupParam(CGroupsHandler.CGroupController.MEMORY, id,
+            CGroupsHandler.CGROUP_PARAM_MEMORY_SWAPPINESS, "100");
+    verify(mockCGroupsHandler, times(1))
+        .updateCGroupParam(CGroupsHandler.CGroupController.MEMORY, id,
+            CGroupsHandler.CGROUP_PARAM_MEMORY_HARD_LIMIT_BYTES, "1024M");
+  }
 }