com.xceptance.xlt.gce.OpCreateInstanceGroup Maven / Gradle / Ivy
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XLT (Xceptance LoadTest) is an extensive load and performance test tool developed and maintained by Xceptance.
/*
* Copyright (c) 2005-2022 Xceptance Software Technologies GmbH
*
* Licensed 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 com.xceptance.xlt.gce;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.commons.lang3.StringUtils;
import com.google.api.services.compute.model.InstanceTemplate;
import com.google.api.services.compute.model.Region;
import com.xceptance.common.util.ConsoleUiUtils;
/**
* Lets the user create a managed instance group interactively.
*/
class OpCreateInstanceGroup
{
/**
* The underlying GCE client.
*/
private final GceClient gceClient;
/**
* Constructor.
*
* @param gceClient
* the GCE client to use
*/
OpCreateInstanceGroup(final GceClient gceClient)
{
this.gceClient = gceClient;
}
/**
* Lets the user create an instance group interactively.
*
* @throws IOException
* if anything goes wrong
*/
void execute() throws IOException
{
final List instanceTemplates = gceClient.getInstanceTemplates();
if (instanceTemplates.isEmpty())
{
System.out.println("To create a managed instance group, an instance template is needed but none was found.");
return;
}
final List regions = gceClient.getRegions();
final List selectedRegions = GceAdminUtils.multiSelectRegions(regions);
System.out.println();
final InstanceTemplate instanceTemplate = selectInstanceTemplate(instanceTemplates);
System.out.println();
final String instanceGroupName = readInstanceGroupName();
System.out.println();
final int instanceCount = readInstanceCount();
System.out.println();
final StringBuilder sb = new StringBuilder();
sb.append(" Regions : ").append(getRegionNames(selectedRegions)).append("\n");
sb.append(" Instance group name : ").append(instanceGroupName).append("\n");
sb.append(" Instance count : ").append(instanceCount).append("\n");
sb.append(" Instance template ").append("\n");
sb.append(" - Name : ").append(instanceTemplate.getName()).append("\n");
sb.append(" - Image : ")
.append(instanceTemplate.getProperties().getDisks().get(0).getInitializeParams().getSourceImage()).append("\n");
sb.append(" - Machine type : ").append(instanceTemplate.getProperties().getMachineType()).append("\n");
sb.append("\n");
sb.append("Do you want to create a managed instance group with the above configuration?");
if (ConsoleUiUtils.confirm(sb.toString()))
{
System.out.println();
// whether to append the region name to the instance group name
final boolean appendRegionName = selectedRegions.size() > 1 && instanceCount > 1;
int remainingRegions = selectedRegions.size();
int remainingInstances = instanceCount;
for (Region region : selectedRegions)
{
final String regionName = region.getName();
// calculate the number of instances to start in this region
final int instancesInRegion = (int) Math.ceil((double) remainingInstances / (double) remainingRegions);
remainingInstances -= instancesInRegion;
remainingRegions--;
// something to do here in this region?
if (instancesInRegion > 0)
{
try
{
final String regionizedInstanceGroupName = appendRegionName ? instanceGroupName + "-" + regionName
: instanceGroupName;
System.out.printf("Creating instance group '%s' with %d instance(s) in region '%s' ... ",
regionizedInstanceGroupName, instancesInRegion, regionName);
gceClient.createInstanceGroup(regionName, regionizedInstanceGroupName, instanceTemplate.getName(),
instancesInRegion);
System.out.println("OK");
}
catch (final Exception e)
{
GceAdminUtils.logError("Failed to create instance group", e);
}
}
}
}
}
/**
* Returns the names of the given regions.
*
* @return the region names
*/
private static String getRegionNames(final List regions)
{
List regionNames = regions.stream().map(Region::getName).collect(Collectors.toList());
return StringUtils.join(regionNames, ", ");
}
/**
* Asks the user to select an instance template from the list of available instance templates.
*
* @param instanceTemplates
* the available instance templates
* @return the selected instance template
*/
private InstanceTemplate selectInstanceTemplate(final List instanceTemplates)
{
final List instanceTemplateNames = new ArrayList<>();
for (final InstanceTemplate instanceTemplate : instanceTemplates)
{
instanceTemplateNames.add(instanceTemplate.getName());
}
return ConsoleUiUtils.selectItem("Select an instance template:", instanceTemplateNames, instanceTemplates);
}
/**
* Asks the user to enter the name for the instance group.
*
* @return the instance group name
*/
private String readInstanceGroupName()
{
return ConsoleUiUtils.readLine("Enter the name of the instance group");
}
/**
* Asks the user to enter the number of GCE instances to start.
*
* @return the instance count
*/
private int readInstanceCount()
{
return ConsoleUiUtils.readInt("Enter the number of instances to start");
}
}