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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.autoscale;
import com.yahoo.collections.Pair;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.transaction.Mutex;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.provisioning.ProvisioningTester;
import com.yahoo.vespa.hosted.provision.testutils.OrchestratorMock;
import com.yahoo.vespa.applicationmodel.HostName;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class MetricsV2MetricsFetcherTest {
private static final double delta = 0.00000001;
@Test
public void testMetricsFetch() throws Exception {
NodeResources resources = new NodeResources(1, 10, 100, 1);
ProvisioningTester tester = new ProvisioningTester.Builder().build();
OrchestratorMock orchestrator = new OrchestratorMock();
MockHttpClient httpClient = new MockHttpClient();
MetricsV2MetricsFetcher fetcher = new MetricsV2MetricsFetcher(tester.nodeRepository(), orchestrator, httpClient);
tester.makeReadyNodes(4, resources); // Creates (in order) host-1.yahoo.com, host-2.yahoo.com, host-3.yahoo.com, host-4.yahoo.com
tester.activateTenantHosts();
ApplicationId application1 = ProvisioningTester.applicationId();
ApplicationId application2 = ProvisioningTester.applicationId();
tester.deploy(application1, Capacity.from(new ClusterResources(2, 1, resources))); // host-1.yahoo.com, host-2.yahoo.com
tester.deploy(application2, Capacity.from(new ClusterResources(2, 1, resources))); // host-4.yahoo.com, host-3.yahoo.com
orchestrator.suspend(new HostName("host-4.yahoo.com"));
{
httpClient.cannedResponse = cannedResponseForApplication1;
List<Pair<String, MetricSnapshot>> values = new ArrayList<>(fetcher.fetchMetrics(application1).get().metrics());
assertEquals("http://host-1.yahoo.com:4080/metrics/v2/values?consumer=autoscaling",
httpClient.requestsReceived.get(0));
assertEquals(2, values.size());
assertEquals("host-1.yahoo.com", values.get(0).getFirst());
assertEquals(0.162, values.get(0).getSecond().cpu(), delta);
assertEquals(0.231, values.get(0).getSecond().memory(), delta);
assertEquals(0.820, values.get(0).getSecond().disk(), delta);
assertEquals("host-2.yahoo.com", values.get(1).getFirst());
assertEquals(0.2, values.get(1).getSecond().cpu(), delta);
assertEquals(0.0, values.get(1).getSecond().memory(), delta);
assertEquals(0.4, values.get(1).getSecond().disk(), delta);
}
{
httpClient.cannedResponse = cannedResponseForApplication2;
List<Pair<String, MetricSnapshot>> values = new ArrayList<>(fetcher.fetchMetrics(application2).get().metrics());
assertEquals("http://host-3.yahoo.com:4080/metrics/v2/values?consumer=autoscaling",
httpClient.requestsReceived.get(1));
assertEquals(1, values.size());
assertEquals("host-3.yahoo.com", values.get(0).getFirst());
assertEquals(0.10, values.get(0).getSecond().cpu(), delta);
assertEquals(0.15, values.get(0).getSecond().memory(), delta);
assertEquals(0.20, values.get(0).getSecond().disk(), delta);
assertEquals(3, values.get(0).getSecond().generation(), delta);
assertTrue(values.get(0).getSecond().stable());
}
{
httpClient.cannedResponse = cannedResponseForApplication2;
try (Mutex lock = tester.nodeRepository().nodes().lock(application1)) {
tester.nodeRepository().nodes().write(tester.nodeRepository().nodes().list(Node.State.active).owner(application2)
.first().get().retire(tester.clock().instant()), lock);
}
List<Pair<String, MetricSnapshot>> values = new ArrayList<>(fetcher.fetchMetrics(application2).get().metrics());
assertFalse(values.get(0).getSecond().stable());
}
}
private static class MockHttpClient implements MetricsV2MetricsFetcher.AsyncHttpClient {
List<String> requestsReceived = new ArrayList<>();
String cannedResponse = null;
@Override
public CompletableFuture<String> get(String url) {
requestsReceived.add(url);
return CompletableFuture.completedFuture(cannedResponse);
}
@Override
public void close() { }
}
final String cannedResponseForApplication1 =
"{\n" +
" \"nodes\": [\n" +
" {\n" +
" \"hostname\": \"host-1.yahoo.com\",\n" +
" \"role\": \"role0\",\n" +
" \"node\": {\n" +
" \"timestamp\": 1234,\n" +
" \"metrics\": [\n" +
" {\n" +
" \"values\": {\n" +
" \"cpu.util\": 16.2,\n" +
" \"mem.util\": 23.1,\n" +
" \"disk.util\": 82\n" +
" },\n" +
" \"dimensions\": {\n" +
" \"state\": \"active\"\n" +
" }\n" +
" }\n" +
" ]\n" +
" }\n" +
" },\n" +
" {\n" +
" \"hostname\": \"host-2.yahoo.com\",\n" +
" \"role\": \"role1\",\n" +
" \"node\": {\n" +
" \"timestamp\": 1200,\n" +
" \"metrics\": [\n" +
" {\n" +
" \"values\": {\n" +
" \"cpu.util\": 20,\n" +
" \"disk.util\": 40\n" +
" },\n" +
" \"dimensions\": {\n" +
" \"state\": \"active\"\n" +
" }\n" +
" }\n" +
" ]\n" +
" }\n" +
" }\n" +
" ]\n" +
"}\n";
final String cannedResponseForApplication2 =
"{\n" +
" \"nodes\": [\n" +
" {\n" +
" \"hostname\": \"host-3.yahoo.com\",\n" +
" \"role\": \"role0\",\n" +
" \"node\": {\n" +
" \"timestamp\": 1300,\n" +
" \"metrics\": [\n" +
" {\n" +
" \"values\": {\n" +
" \"cpu.util\": 10,\n" +
" \"mem.util\": 15,\n" +
" \"disk.util\": 20,\n" +
" \"application_generation\": 3\n" +
" },\n" +
" \"dimensions\": {\n" +
" \"state\": \"active\"\n" +
" }\n" +
" }\n" +
" ]\n" +
" }\n" +
" }\n" +
" ]\n" +
"}\n";
}
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