java - 如何使用 java lambda 函数创建 ec2 实例?
问题描述
我可以在 Eclipse 中使用本地机器上的 Java 创建 EC2 实例。我面临的问题是我找不到使用 Java Lambda 函数创建 EC2 实例的方法。有人可以帮帮我吗?
我正在使用的 lambda 函数:-
package com.ec2application.ec2application;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.ec2.AmazonEC2;
import com.amazonaws.services.ec2.AmazonEC2ClientBuilder;
import com.amazonaws.services.ec2.model.CreateTagsRequest;
import com.amazonaws.services.ec2.model.Instance;
import com.amazonaws.services.ec2.model.InstanceNetworkInterfaceSpecification;
import com.amazonaws.services.ec2.model.RunInstancesRequest;
import com.amazonaws.services.ec2.model.RunInstancesResult;
import com.amazonaws.services.ec2.model.StartInstancesRequest;
import com.amazonaws.services.ec2.model.Tag;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
public class EC2UsingLambda implements RequestHandler<Object, String>
{
private static final AWSCredentials AWS_CREDENTIALS;
static {
// Your accesskey and secretkey
AWS_CREDENTIALS = new BasicAWSCredentials(
"myid",
"key"
);
}
public String handleRequest(Object input, Context context)
{
context.getLogger().log("Input: " + input);
// TODO: implement your handler
// Set up the amazon ec2 client
AmazonEC2 ec2Client = AmazonEC2ClientBuilder.standard()
.withCredentials(new AWSStaticCredentialsProvider(AWS_CREDENTIALS))
.withRegion(Regions.US_EAST_1)
.build();
// Launch an Amazon EC2 Instance
RunInstancesRequest runInstancesRequest = new RunInstancesRequest().withImageId("ami-0080e4c5bc078760e")
.withInstanceType("t2.micro") // https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-types.html
.withMinCount(1)
.withMaxCount(1)
.withKeyName("priyajdm")
.withNetworkInterfaces(new InstanceNetworkInterfaceSpecification()
.withAssociatePublicIpAddress(true)
.withDeviceIndex(0)
.withSubnetId("subnet-02ffd56c277")
.withGroups("sg-0e93be4d"));
RunInstancesResult runInstancesResult = ec2Client.runInstances(runInstancesRequest);
Instance instance = runInstancesResult.getReservation().getInstances().get(0);
String instanceId = instance.getInstanceId();
System.out.println("EC2 Instance Id: " + instanceId);
// Setting up the tags for the instance
CreateTagsRequest createTagsRequest = new CreateTagsRequest()
.withResources(instance.getInstanceId())
.withTags(new Tag("Name", "demo"));
ec2Client.createTags(createTagsRequest);
// Starting the Instance
StartInstancesRequest startInstancesRequest = new StartInstancesRequest().withInstanceIds(instanceId);
ec2Client.startInstances(startInstancesRequest);
return "EC2 Instance created";
}
}
这是我使用的代码:- 这是我得到的错误:-
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /C:/Users/priyj_kumar/workspace/EC2Application/src/main/java/com/ec2application/ec2application/EC2UsingLambda.java:[16,45] package com.amazonaws.services.lambda.runtime does not exist
[ERROR] /C:/Users/priyj_kumar/workspace/EC2Application/src/main/java/com/ec2application/ec2application/EC2UsingLambda.java:[17,45] package com.amazonaws.services.lambda.runtime does not exist
[ERROR] /C:/Users/priyj_kumar/workspace/EC2Application/src/main/java/com/ec2application/ec2application/EC2UsingLambda.java:[19,40] cannot find symbol
symbol: class RequestHandler
[ERROR] /C:/Users/priyj_kumar/workspace/EC2Application/src/main/java/com/ec2application/ec2application/EC2UsingLambda.java:[32,47] cannot find symbol
symbol: class Context
location: class com.ec2application.ec2application.EC2UsingLambda
[INFO] 4 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
解决方案
您可以将调用给定服务的 Java API 调用封装在 Lambda 函数中。我们写了一篇文章,向您展示如何创建一个 Lambda 函数,该函数使用给定的服务客户端调用 AWS 服务操作。
然后在 AWS Steps 中使用 Lambda 函数来创建工作流。如果您遵循本文档,您将看到从可以包装在 Lambda 函数中的代码成功调用 AWS 服务操作的模式。看:
在您的使用案例中,您可以在 Lambda 函数中使用 EC2 服务客户端。
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