EC2の起動・停止を費用の削減目的で実施

EC2インスタンスを使わないときは落そう。自動で。
以下の様に簡単にできる。

	package jp.masaz.aws;
	import java.util.ArrayList;
	import java.util.List;
	import com.amazonaws.auth.BasicAWSCredentials;
	import com.amazonaws.regions.Region;
	import com.amazonaws.regions.Regions;
	import com.amazonaws.services.ec2.AmazonEC2Client;
	import com.amazonaws.services.ec2.model.InstanceState;
	import com.amazonaws.services.ec2.model.InstanceStateChange;
	import com.amazonaws.services.ec2.model.StartInstancesRequest;
	import com.amazonaws.services.ec2.model.StartInstancesResult;
	import com.amazonaws.services.ec2.model.StopInstancesRequest;
	import com.amazonaws.services.ec2.model.StopInstancesResult;
	/**
	* EC2を操作するクラス
	*
	* @author masahiro
	*
	*/
	public class EC2Tools {
	public void startEc2(String intanceId, boolean isDebug) {
	try {
	if (isDebug) {
	System.out.println("start: " + intanceId);
	return;
	}
	BasicAWSCredentials basicAwsCredentials = new BasicAWSCredentials(
	AWSConsts.ACCESS_KEY, AWSConsts.SECRET_ACCESS_KEY);
	AmazonEC2Client amazonEC2Client = new AmazonEC2Client(
	basicAwsCredentials);
	amazonEC2Client.setRegion(Region.getRegion(Regions.AP_NORTHEAST_1));
	List<String> instanceIds = new ArrayList<String>();
	instanceIds.add(intanceId);
	StartInstancesRequest startInstancesRequest = new StartInstancesRequest(
	instanceIds);
	// インスタンスの起動
	StartInstancesResult startInstancesResult = amazonEC2Client
	.startInstances(startInstancesRequest);
	List<InstanceStateChange> stateChanges = startInstancesResult
	.getStartingInstances();
	List<String> stateList = getResultStatus(stateChanges);
	int changeCnt = stateList.size();
	System.out.println("start instance cnt: " + changeCnt);
	for (String output : stateList) {
	System.out.println("start result:" + output);
	}
	} catch (Exception exception) {
	System.out.println("[Error] failed to start ec2 instance: "
	+ exception.getMessage());
	}
	}
	public void stopEc2(String intanceId, boolean isDebug) {
	try {
	if (isDebug) {
	System.out.println("stop: " + intanceId);
	return;
	}
	BasicAWSCredentials basicAwsCredentials = new BasicAWSCredentials(
	AWSConsts.ACCESS_KEY, AWSConsts.SECRET_ACCESS_KEY);
	AmazonEC2Client amazonEC2Client = new AmazonEC2Client(
	basicAwsCredentials);
	amazonEC2Client.setRegion(Region.getRegion(Regions.AP_NORTHEAST_1));
	List<String> instanceIds = new ArrayList<String>();
	instanceIds.add(intanceId);
	StopInstancesRequest stopInstancesRequest = new StopInstancesRequest(
	instanceIds);
	// インスタンスの停止
	StopInstancesResult stopInstancesResult = amazonEC2Client
	.stopInstances(stopInstancesRequest);
	List<InstanceStateChange> stateChanges = stopInstancesResult
	.getStoppingInstances();
	List<String> stateList = getResultStatus(stateChanges);
	int changeCnt = stateList.size();
	System.out.println("stop instance cnt: " + changeCnt);
	for (String output : stateList) {
	System.out.println("stop result: " + output);
	}
	} catch (Exception exception) {
	System.out.println("[Error] failed to stop ec2 instance: "
	+ exception.getMessage());
	}
	}
	private List<String> getResultStatus(List<InstanceStateChange> stateChanges) {
	ArrayList<String> resultList = new ArrayList<String>();
	for (InstanceStateChange state : stateChanges) {
	String id = state.getInstanceId();
	InstanceState pState = state.getPreviousState();
	InstanceState cState = state.getCurrentState();
	StringBuilder sb = new StringBuilder();
	sb.append(id);
	sb.append("\t");
	sb.append("pState: ");
	sb.append(pState.getName());
	sb.append(",");
	sb.append(pState.getCode());
	sb.append("\t");
	sb.append("cState: ");
	sb.append(cState.getName());
	sb.append(",");
	sb.append(cState.getCode());
	resultList.add(sb.toString());
	}
	return resultList;
	}
	}

view raw Ec2Tools.java hosted with ❤ by GitHub