@Test
public void testUpdateHostsForDownscaleWhenRemainingSpaceIsNotEnough() throws Exception {
HostGroupAdjustmentJson json = new HostGroupAdjustmentJson();
json.setHostGroup("slave_1");
json.setScalingAdjustment(-1);
AmbariClient ambariClient = mock(AmbariClient.class);
HostMetadata metadata1 = mock(HostMetadata.class);
InstanceMetaData instanceMetaData1 = mock(InstanceMetaData.class);
HostMetadata metadata2 = mock(HostMetadata.class);
InstanceMetaData instanceMetaData2 = mock(InstanceMetaData.class);
HostMetadata metadata3 = mock(HostMetadata.class);
InstanceMetaData instanceMetaData3 = mock(InstanceMetaData.class);
Set<HostMetadata> hostsMetaData = new HashSet<>();
List<HostMetadata> hostsMetadataList = asList(metadata1, metadata2, metadata3);
hostsMetaData.addAll(hostsMetadataList);
HostGroup hostGroup = new HostGroup();
hostGroup.setHostMetadata(hostsMetaData);
hostGroup.setName("slave_1");
Map<String, Map<Long, Long>> dfsSpace = new HashMap<>();
dfsSpace.put("node2", singletonMap(5_000L, 15_000L));
dfsSpace.put("node1", singletonMap(10_000L, 10_000L));
dfsSpace.put("node3", singletonMap(6_000L, 20_000L));
when(metadata1.getHostName()).thenReturn("node1");
when(metadata2.getHostName()).thenReturn("node2");
when(metadata3.getHostName()).thenReturn("node3");
when(instanceMetaData1.getAmbariServer()).thenReturn(false);
when(instanceMetaData2.getAmbariServer()).thenReturn(false);
when(instanceMetaData3.getAmbariServer()).thenReturn(false);
when(hostGroupRepository.findHostGroupInClusterByName(cluster.getId(), "slave_1"))
.thenReturn(hostGroup);
when(ambariClientProvider.getAmbariClient(
any(TLSClientConfig.class), any(String.class), any(String.class)))
.thenReturn(ambariClient);
when(ambariClient.getComponentsCategory("multi-node-yarn", "slave_1"))
.thenReturn(singletonMap("DATANODE", "SLAVE"));
when(configurationService.getConfiguration(ambariClient, "slave_1"))
.thenReturn(singletonMap(ConfigParam.DFS_REPLICATION.key(), "1"));
when(hostFilterService.filterHostsForDecommission(stack, hostsMetaData, "slave_1"))
.thenReturn(hostsMetadataList);
when(ambariClient.getBlueprintMap(cluster.getBlueprint().getBlueprintName()))
.thenReturn(singletonMap("slave_1", asList("DATANODE")));
when(ambariClient.getDFSSpace()).thenReturn(dfsSpace);
when(instanceMetadataRepository.findHostInStack(stack.getId(), "node1"))
.thenReturn(instanceMetaData1);
when(instanceMetadataRepository.findHostInStack(stack.getId(), "node2"))
.thenReturn(instanceMetaData2);
when(instanceMetadataRepository.findHostInStack(stack.getId(), "node3"))
.thenReturn(instanceMetaData3);
Exception result = null;
try {
underTest.updateHosts(stack.getId(), json);
} catch (BadRequestException e) {
result = e;
}
assertEquals(
"Trying to move '10000' bytes worth of data to nodes with '11000' bytes of capacity is not allowed",
result.getMessage());
}
@Test(expected = BadRequestException.class)
public void testUpdateHostsDoesntAcceptScalingAdjustmentsWithDifferentSigns() throws Exception {
// GIVEN
HostGroupAdjustmentJson hga1 = new HostGroupAdjustmentJson();
hga1.setHostGroup("slave_1");
hga1.setScalingAdjustment(-2);
// WHEN
underTest.updateHosts(stack.getId(), hga1);
}
@Test
public void testUpdateHostsForDownscaleSelectNodesWithLessData()
throws ConnectException, CloudbreakSecuritySetupException {
HostGroupAdjustmentJson json = new HostGroupAdjustmentJson();
json.setHostGroup("slave_1");
json.setScalingAdjustment(-1);
AmbariClient ambariClient = mock(AmbariClient.class);
HostMetadata metadata1 = mock(HostMetadata.class);
InstanceMetaData instanceMetaData1 = mock(InstanceMetaData.class);
HostMetadata metadata2 = mock(HostMetadata.class);
InstanceMetaData instanceMetaData2 = mock(InstanceMetaData.class);
HostMetadata metadata3 = mock(HostMetadata.class);
InstanceMetaData instanceMetaData3 = mock(InstanceMetaData.class);
Set<HostMetadata> hostsMetaData = new HashSet<>();
List<HostMetadata> hostsMetadataList = asList(metadata1, metadata2, metadata3);
hostsMetaData.addAll(hostsMetadataList);
HostGroup hostGroup = new HostGroup();
hostGroup.setHostMetadata(hostsMetaData);
hostGroup.setName("slave_1");
Map<String, Map<Long, Long>> dfsSpace = new HashMap<>();
dfsSpace.put("node2", singletonMap(85_000L, 15_000L));
dfsSpace.put("node1", singletonMap(90_000L, 10_000L));
dfsSpace.put("node3", singletonMap(80_000L, 20_000L));
when(metadata1.getHostName()).thenReturn("node1");
when(metadata2.getHostName()).thenReturn("node2");
when(metadata3.getHostName()).thenReturn("node3");
when(instanceMetaData1.getAmbariServer()).thenReturn(false);
when(instanceMetaData2.getAmbariServer()).thenReturn(false);
when(instanceMetaData3.getAmbariServer()).thenReturn(false);
when(hostGroupRepository.findHostGroupInClusterByName(cluster.getId(), "slave_1"))
.thenReturn(hostGroup);
when(ambariClientProvider.getAmbariClient(
any(TLSClientConfig.class), any(String.class), any(String.class)))
.thenReturn(ambariClient);
when(ambariClient.getComponentsCategory("multi-node-yarn", "slave_1"))
.thenReturn(singletonMap("DATANODE", "SLAVE"));
when(configurationService.getConfiguration(ambariClient, "slave_1"))
.thenReturn(singletonMap(ConfigParam.DFS_REPLICATION.key(), "1"));
when(hostFilterService.filterHostsForDecommission(stack, hostsMetaData, "slave_1"))
.thenReturn(hostsMetadataList);
when(ambariClient.getBlueprintMap(cluster.getBlueprint().getBlueprintName()))
.thenReturn(singletonMap("slave_1", asList("DATANODE")));
when(ambariClient.getDFSSpace()).thenReturn(dfsSpace);
when(instanceMetadataRepository.findHostInStack(stack.getId(), "node1"))
.thenReturn(instanceMetaData1);
when(instanceMetadataRepository.findHostInStack(stack.getId(), "node2"))
.thenReturn(instanceMetaData2);
when(instanceMetadataRepository.findHostInStack(stack.getId(), "node3"))
.thenReturn(instanceMetaData3);
doNothing().when(flowManager).triggerClusterDownscale(anyObject());
underTest.updateHosts(stack.getId(), json);
verify(flowManager, times(1)).triggerClusterDownscale(anyObject());
}
@Test
public void testUpdateHostsForDownscaleCannotGoBelowReplication()
throws ConnectException, CloudbreakSecuritySetupException {
HostGroupAdjustmentJson json = new HostGroupAdjustmentJson();
json.setHostGroup("slave_1");
json.setScalingAdjustment(-1);
AmbariClient ambariClient = mock(AmbariClient.class);
HostMetadata metadata1 = mock(HostMetadata.class);
HostMetadata metadata2 = mock(HostMetadata.class);
HostMetadata metadata3 = mock(HostMetadata.class);
Set<HostMetadata> hostsMetaData = new HashSet<>();
List<HostMetadata> hostsMetadataList = asList(metadata1, metadata2, metadata3);
hostsMetaData.addAll(hostsMetadataList);
HostGroup hostGroup = new HostGroup();
hostGroup.setHostMetadata(hostsMetaData);
hostGroup.setName("slave_1");
when(hostGroupRepository.findHostGroupInClusterByName(cluster.getId(), "slave_1"))
.thenReturn(hostGroup);
when(ambariClientProvider.getAmbariClient(
any(TLSClientConfig.class), any(String.class), any(String.class)))
.thenReturn(ambariClient);
when(ambariClient.getComponentsCategory("multi-node-yarn", "slave_1"))
.thenReturn(singletonMap("DATANODE", "SLAVE"));
when(configurationService.getConfiguration(ambariClient, "slave_1"))
.thenReturn(singletonMap(ConfigParam.DFS_REPLICATION.key(), "2"));
when(hostFilterService.filterHostsForDecommission(stack, hostsMetaData, "slave_1"))
.thenReturn(asList(metadata2, metadata3));
Exception result = null;
try {
underTest.updateHosts(stack.getId(), json);
} catch (BadRequestException e) {
result = e;
}
assertTrue(result.getMessage().startsWith("There is not enough node to downscale."));
}