/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.brooklyn.policy.autoscaling;
import static org.apache.brooklyn.policy.autoscaling.AutoScalerPolicyTest.currentSizeAsserter;
import org.apache.brooklyn.api.entity.EntitySpec;
import org.apache.brooklyn.api.sensor.AttributeSensor;
import org.apache.brooklyn.core.entity.Entities;
import org.apache.brooklyn.core.sensor.Sensors;
import org.apache.brooklyn.core.test.entity.TestApplication;
import org.apache.brooklyn.core.test.entity.TestCluster;
import org.apache.brooklyn.test.Asserts;
import org.apache.brooklyn.util.time.Duration;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import com.google.common.collect.ImmutableMap;
public class AutoScalerPolicyReconfigurationTest {
private static long TIMEOUT_MS = 10000;
private static final AttributeSensor<Integer> MY_ATTRIBUTE = Sensors.newIntegerSensor("autoscaler.test.intAttrib");
TestApplication app;
TestCluster tc;
@BeforeMethod(alwaysRun=true)
public void before() throws Exception {
app = TestApplication.Factory.newManagedInstanceForTests();
tc = app.createAndManageChild(EntitySpec.create(TestCluster.class)
.configure("initialSize", 1));
}
@AfterMethod(alwaysRun=true)
public void tearDown() throws Exception {
if (app != null) Entities.destroyAll(app.getManagementContext());
}
@Test
public void testIncreaseMinPoolSizeCausesImmediateGrowth() {
tc.resize(2);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.minPoolSize(2)
.build();
tc.policies().add(policy);
policy.config().set(AutoScalerPolicy.MIN_POOL_SIZE, 3);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 3));
}
@Test
public void testDecreaseMinPoolSizeAllowsSubsequentShrink() {
tc.resize(4);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.minPoolSize(2)
.build();
tc.policies().add(policy);
// 25*4 = 100 -> 2 nodes at 50 each
tc.sensors().set(MY_ATTRIBUTE, 25);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 2));
// Decreases to new min-size
policy.config().set(AutoScalerPolicy.MIN_POOL_SIZE, 1);
tc.sensors().set(MY_ATTRIBUTE, 0);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 1));
}
@Test
public void testDecreaseMaxPoolSizeCausesImmediateShrink() {
tc.resize(6);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.maxPoolSize(6)
.build();
tc.policies().add(policy);
policy.config().set(AutoScalerPolicy.MAX_POOL_SIZE, 4);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 4));
}
@Test
public void testIncreaseMaxPoolSizeAllowsSubsequentGrowth() {
tc.resize(3);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.maxPoolSize(6)
.build();
tc.policies().add(policy);
// 200*3 = 600 -> 6 nodes at 100 each
tc.sensors().set(MY_ATTRIBUTE, 200);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 6));
policy.config().set(AutoScalerPolicy.MAX_POOL_SIZE, 8);
// Increases to max-size only
tc.sensors().set(MY_ATTRIBUTE, 100000);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 8));
}
@Test
public void testReconfigureMetricLowerBound() {
tc.resize(2);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.build();
tc.policies().add(policy);
policy.config().set(AutoScalerPolicy.METRIC_LOWER_BOUND, 51);
tc.sensors().set(MY_ATTRIBUTE, 50);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 1));
}
@Test
public void testReconfigureMetricUpperBound() {
tc.resize(1);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.build();
tc.policies().add(policy);
policy.config().set(AutoScalerPolicy.METRIC_UPPER_BOUND, 99);
tc.sensors().set(MY_ATTRIBUTE, 100);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 2));
}
@Test
public void testReconfigureResizeUpStabilizationDelay() {
tc.resize(1);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.resizeUpStabilizationDelay(Duration.TWO_MINUTES)
.build();
tc.policies().add(policy);
policy.config().set(AutoScalerPolicy.RESIZE_UP_STABILIZATION_DELAY, Duration.ZERO);
tc.sensors().set(MY_ATTRIBUTE, 101);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 2));
}
@Test
public void testReconfigureResizeDownStabilizationDelay() {
tc.resize(2);
AutoScalerPolicy policy = new AutoScalerPolicy.Builder().metric(MY_ATTRIBUTE)
.metricLowerBound(50).metricUpperBound(100)
.resizeDownStabilizationDelay(Duration.TWO_MINUTES)
.build();
tc.policies().add(policy);
policy.config().set(AutoScalerPolicy.RESIZE_DOWN_STABILIZATION_DELAY, Duration.ZERO);
tc.sensors().set(MY_ATTRIBUTE, 1);
Asserts.succeedsEventually(ImmutableMap.of("timeout", TIMEOUT_MS), currentSizeAsserter(tc, 1));
}
}