github.com/mweagle/Sparta@v1.15.0/docs/reference/eventsources/cloudwatchlogs/index.html (about)

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   332          Slack SlashCommand
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   350          <a href="/reference/apigateway/s3site/">
   351          S3 Sites with CORS
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   407            <b>Event Sources</b>
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   466          CloudWatch Events
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   485          CloudWatch Logs
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   504          Cognito
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   523          DynamoDB
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   542          Kinesis
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   561          S3
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   580          SES
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   599          SNS
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   618          SQS
   619          
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   649        <a href="/reference/archetypes/">
   650            <b>Archetype Constructors</b>
   651            
   652        </a>
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   670          <a href="/reference/archetypes/event_bridge/">
   671          Event Bridge
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   690          CodeCommit
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   707        <li data-nav-id="/reference/archetypes/cloudwatch/" title="CloudWatch" class="dd-item ">
   708          <a href="/reference/archetypes/cloudwatch/">
   709          CloudWatch
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   727          <a href="/reference/archetypes/dynamodb/">
   728          DynamoDB
   729          
   730          </a>
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   746          <a href="/reference/archetypes/kinesis/">
   747          Kinesis
   748          
   749          </a>
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   765          <a href="/reference/archetypes/kinesis_firehose/">
   766          Kinesis Firehose
   767          
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   769      </li>
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   784          <a href="/reference/archetypes/rest/">
   785          REST Service
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   804          S3
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   822          <a href="/reference/archetypes/sns/">
   823          SNS
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   850          
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   854        <a href="/reference/decorators/">
   855            <b>Build-Time Decorators</b>
   856            
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   875          <a href="/reference/decorators/application_load_balancer/">
   876          Application Load Balancer
   877          
   878          </a>
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   894          <a href="/reference/decorators/cloudmap/">
   895          CloudMap Service Discovery
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   913          <a href="/reference/decorators/cloudfront_distribution/">
   914          CloudFront Distribution
   915          
   916          </a>
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   932          <a href="/reference/decorators/lambda_versioning/">
   933          Lambda Versioning Decorator
   934          
   935          </a>
   936      </li>
   937       
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   951          <a href="/reference/decorators/publish_outputs/">
   952          Publishing Outputs
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   970          <a href="/reference/decorators/s3_artifact_publisher/">
   971          S3 Artifact Publisher
   972          
   973          </a>
   974      </li>
   975       
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   978  
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   988        <li data-nav-id="/reference/decorators/dynamic_infrastructure/" title="Dynamic Infrastructure" class="dd-item ">
   989          <a href="/reference/decorators/dynamic_infrastructure/">
   990          Dynamic Infrastructure
   991          
   992          </a>
   993      </li>
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  1022            <b>Runtime Interceptors</b>
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  1043          XRayInterceptor
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  1074        <a href="/reference/cli_options/">
  1075            <b>Command Line Options</b>
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  1099            <b>Application Customization</b>
  1100            
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  1120          Custom Commands
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  1138          <a href="/reference/application/custom_flags/">
  1139          Custom Flags
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  1157          <a href="/reference/application/environments/">
  1158          Managing Environments
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  1175        <li data-nav-id="/reference/application/custom_lambda_resources/" title="CloudFormation Resources" class="dd-item ">
  1176          <a href="/reference/application/custom_lambda_resources/">
  1177          CloudFormation Resources
  1178          
  1179          </a>
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  1194        <li data-nav-id="/reference/application/custom_resources/" title="Custom Resources" class="dd-item ">
  1195          <a href="/reference/application/custom_resources/">
  1196          Custom Resources
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  1199      </li>
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  1227        <a href="/reference/step/">
  1228            <b>Step Functions</b>
  1229            
  1230        </a>
  1231        
  1232        
  1233          <ul>
  1234            
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  1249        <li data-nav-id="/reference/step/lambda/" title="Lambda" class="dd-item ">
  1250          <a href="/reference/step/lambda/">
  1251          Lambda
  1252          
  1253          </a>
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  1269          <a href="/reference/step/fargate/">
  1270          Fargate
  1271          
  1272          </a>
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  1291          ">
  1292        <a href="/reference/step/services/">
  1293            <b>Service Integrations</b>
  1294            
  1295        </a>
  1296        
  1297        
  1298          <ul>
  1299            
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  1309   
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  1312        <li data-nav-id="/reference/step/services/dynamodb/" title="Amazon DynamoDb" class="dd-item ">
  1313          <a href="/reference/step/services/dynamodb/">
  1314          Amazon DynamoDb
  1315          
  1316          </a>
  1317      </li>
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  1328   
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  1330      
  1331        <li data-nav-id="/reference/step/services/sagemaker/" title="Amazon SageMaker" class="dd-item ">
  1332          <a href="/reference/step/services/sagemaker/">
  1333          Amazon SageMaker
  1334          
  1335          </a>
  1336      </li>
  1337       
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  1339   
  1340  
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  1347   
  1348    
  1349      
  1350        <li data-nav-id="/reference/step/services/sns/" title="Amazon SNS" class="dd-item ">
  1351          <a href="/reference/step/services/sns/">
  1352          Amazon SNS
  1353          
  1354          </a>
  1355      </li>
  1356       
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  1358   
  1359  
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  1366   
  1367    
  1368      
  1369        <li data-nav-id="/reference/step/services/sqs/" title="Amazon SQS" class="dd-item ">
  1370          <a href="/reference/step/services/sqs/">
  1371          Amazon SQS
  1372          
  1373          </a>
  1374      </li>
  1375       
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  1378  
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  1385   
  1386    
  1387      
  1388        <li data-nav-id="/reference/step/services/batch/" title="AWS Batch" class="dd-item ">
  1389          <a href="/reference/step/services/batch/">
  1390          AWS Batch
  1391          
  1392          </a>
  1393      </li>
  1394       
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  1397  
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  1404   
  1405    
  1406      
  1407        <li data-nav-id="/reference/step/services/fargate/" title="AWS Fargate" class="dd-item ">
  1408          <a href="/reference/step/services/fargate/">
  1409          AWS Fargate
  1410          
  1411          </a>
  1412      </li>
  1413       
  1414    
  1415   
  1416  
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  1424    
  1425      
  1426        <li data-nav-id="/reference/step/services/glue/" title="AWS Glue" class="dd-item ">
  1427          <a href="/reference/step/services/glue/">
  1428          AWS Glue
  1429          
  1430          </a>
  1431      </li>
  1432       
  1433    
  1434   
  1435  
  1436              
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  1438          
  1439          </ul>
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  1448          </ul>
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  1459  
  1460   
  1461    
  1462      
  1463        <li data-nav-id="/reference/discovery/" title="Discovery Service" class="dd-item ">
  1464          <a href="/reference/discovery/">
  1465          Discovery Service
  1466          
  1467          </a>
  1468      </li>
  1469       
  1470    
  1471   
  1472  
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  1477  
  1478  
  1479   
  1480    
  1481      
  1482        <li data-nav-id="/reference/docker/" title="Docker" class="dd-item ">
  1483          <a href="/reference/docker/">
  1484          Docker
  1485          
  1486          </a>
  1487      </li>
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  1500      
  1501        <li data-nav-id="/reference/hybrid_topologies/" title="Hybrid Topologies" class="dd-item ">
  1502          <a href="/reference/hybrid_topologies/">
  1503          Hybrid Topologies
  1504          
  1505          </a>
  1506      </li>
  1507       
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  1510  
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  1516  
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  1519      
  1520      <li data-nav-id="/reference/operations/" title="" class="dd-item 
  1521          
  1522          
  1523          
  1524          ">
  1525        <a href="/reference/operations/">
  1526            <b>Operations</b>
  1527            
  1528        </a>
  1529        
  1530        
  1531          <ul>
  1532            
  1533            
  1534            
  1535            
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  1538              
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  1540  
  1541  
  1542   
  1543    
  1544      
  1545        <li data-nav-id="/reference/operations/magefile/" title="Magefiles" class="dd-item ">
  1546          <a href="/reference/operations/magefile/">
  1547          Magefiles
  1548          
  1549          </a>
  1550      </li>
  1551       
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  1553   
  1554  
  1555              
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  1560  
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  1562    
  1563      
  1564        <li data-nav-id="/reference/operations/cloudwatch_alarms/" title="CloudWatch Alarms" class="dd-item ">
  1565          <a href="/reference/operations/cloudwatch_alarms/">
  1566          CloudWatch Alarms
  1567          
  1568          </a>
  1569      </li>
  1570       
  1571    
  1572   
  1573  
  1574              
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  1579  
  1580   
  1581    
  1582      
  1583        <li data-nav-id="/reference/operations/cloudwatch_dashboard/" title="CloudWatch Dashboard" class="dd-item ">
  1584          <a href="/reference/operations/cloudwatch_dashboard/">
  1585          CloudWatch Dashboard
  1586          
  1587          </a>
  1588      </li>
  1589       
  1590    
  1591   
  1592  
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  1602        <li data-nav-id="/reference/operations/codedeploy_service_update/" title="CodeDeploy Service Update" class="dd-item ">
  1603          <a href="/reference/operations/codedeploy_service_update/">
  1604          CodeDeploy Service Update
  1605          
  1606          </a>
  1607      </li>
  1608       
  1609    
  1610   
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  1620      
  1621        <li data-nav-id="/reference/operations/cicd/" title="CI/CD" class="dd-item ">
  1622          <a href="/reference/operations/cicd/">
  1623          CI/CD
  1624          
  1625          </a>
  1626      </li>
  1627       
  1628    
  1629   
  1630  
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  1637   
  1638    
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  1640        <li data-nav-id="/reference/operations/deployment_strategies/" title="Deployment Strategies" class="dd-item ">
  1641          <a href="/reference/operations/deployment_strategies/">
  1642          Deployment Strategies
  1643          
  1644          </a>
  1645      </li>
  1646       
  1647    
  1648   
  1649  
  1650              
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  1657    
  1658      
  1659        <li data-nav-id="/reference/operations/metrics_publisher/" title="Metrics Publisher" class="dd-item ">
  1660          <a href="/reference/operations/metrics_publisher/">
  1661          Metrics Publisher
  1662          
  1663          </a>
  1664      </li>
  1665       
  1666    
  1667   
  1668  
  1669              
  1670            
  1671              
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  1673  
  1674  
  1675   
  1676    
  1677      
  1678        <li data-nav-id="/reference/operations/profiling/" title="Profiling" class="dd-item ">
  1679          <a href="/reference/operations/profiling/">
  1680          Profiling
  1681          
  1682          </a>
  1683      </li>
  1684       
  1685    
  1686   
  1687  
  1688              
  1689            
  1690          
  1691          </ul>
  1692                
  1693      </li>
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  1703   
  1704    
  1705      
  1706        <li data-nav-id="/reference/testing/" title="Testing" class="dd-item ">
  1707          <a href="/reference/testing/">
  1708          Testing
  1709          
  1710          </a>
  1711      </li>
  1712       
  1713    
  1714   
  1715  
  1716              
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  1720  
  1721  
  1722   
  1723    
  1724      
  1725        <li data-nav-id="/reference/supporting_packages/" title="Supporting Packages" class="dd-item ">
  1726          <a href="/reference/supporting_packages/">
  1727          Supporting Packages
  1728          
  1729          </a>
  1730      </li>
  1731       
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  1733   
  1734  
  1735              
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  1737              
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  1739  
  1740  
  1741   
  1742    
  1743      
  1744        <li data-nav-id="/reference/limitations/" title="Limitations" class="dd-item ">
  1745          <a href="/reference/limitations/">
  1746          Limitations
  1747          
  1748          </a>
  1749      </li>
  1750       
  1751    
  1752   
  1753  
  1754              
  1755            
  1756              
  1757              
  1758  
  1759  
  1760   
  1761    
  1762      
  1763        <li data-nav-id="/reference/faq/" title="FAQ" class="dd-item ">
  1764          <a href="/reference/faq/">
  1765          FAQ
  1766          
  1767          </a>
  1768      </li>
  1769       
  1770    
  1771   
  1772  
  1773              
  1774            
  1775          
  1776          </ul>
  1777                
  1778      </li>
  1779    
  1780   
  1781  
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  1783            
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  1788      
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  1790          
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  1812          
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  1834          
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  1952  <nav id="TableOfContents">
  1953    <ul>
  1954      <li><a href="#getting-started">Getting Started</a></li>
  1955      <li><a href="#sparta-integration">Sparta Integration</a></li>
  1956      <li><a href="#add-permission">Add Permission</a></li>
  1957    </ul>
  1958  
  1959    <ul>
  1960      <li><a href="#other-resources">Other Resources</a></li>
  1961    </ul>
  1962  </nav>
  1963      </div>
  1964  </div>
  1965  
  1966                  
  1967                </div>
  1968              </div>
  1969              
  1970          <div id="head-tags">
  1971          
  1972          </div>
  1973          
  1974          <div id="body-inner">
  1975            
  1976              <h1>
  1977                
  1978                CloudWatch Logs
  1979              </h1>
  1980            
  1981  
  1982          
  1983  
  1984  
  1985  
  1986  <p>In this section we&rsquo;ll walkthrough how to trigger your lambda function in response to <a href="https://aws.amazon.com/blogs/aws/new-cloudwatch-events-track-and-respond-to-changes-to-your-aws-resources/">CloudWatch Logs</a>.  This overview is based on the <a href="https://github.com/mweagle/SpartaApplication">SpartaApplication</a> sample code if you&rsquo;d rather jump to the end result.</p>
  1987  <h1 id="goal">Goal</h1>
  1988  <p>Assume that we&rsquo;re supposed to write a simple &ldquo;HelloWorld&rdquo; CloudWatch Logs function that should be triggered in response to any log message issued to a specific Log Group.</p>
  1989  <h2 id="getting-started">Getting Started</h2>
  1990  <p>Our lambda function is relatively short:</p>
  1991  <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"><span style="color:#00f">import</span> (
  1992  	awsLambdaEvents <span style="color:#a31515">&#34;github.com/aws/aws-lambda-go/events&#34;</span>
  1993  )
  1994  <span style="color:#00f">func</span> echoCloudWatchLogsEvent(ctx context.Context, cwlEvent awsLambdaEvents.CloudwatchLogsEvent) (*awsLambdaEvents.CloudwatchLogsEvent, <span style="color:#2b91af">error</span>) {
  1995  	logger, _ := ctx.Value(sparta.ContextKeyRequestLogger).(*logrus.Entry)
  1996  
  1997  	logger.WithFields(logrus.Fields{
  1998  		<span style="color:#a31515">&#34;Event&#34;</span>: cwlEvent,
  1999  	}).Info(<span style="color:#a31515">&#34;Request received&#34;</span>)
  2000  	<span style="color:#00f">return</span> &amp;cwlEvent, <span style="color:#00f">nil</span>
  2001  }
  2002  </code></pre></div><p>Our lambda function doesn&rsquo;t need to do much with the log message other than log and return it.</p>
  2003  <h2 id="sparta-integration">Sparta Integration</h2>
  2004  <p>With <code>echoCloudWatchLogsEvent()</code> implemented, the next step is to integrate the <strong>go</strong> function with Sparta.  This is done by the <code>appendCloudWatchLogsLambda</code> in the SpartaApplication <a href="https://github.com/mweagle/SpartaApplication/blob/master/application.go">application.go</a> source.</p>
  2005  <p>Our lambda function only needs logfile write privileges, and since these are enabled by default, we can use an empty <code>sparta.IAMRoleDefinition</code> value:</p>
  2006  <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"><span style="color:#00f">func</span> appendCloudWatchLogsHandler(api *sparta.API,
  2007  	lambdaFunctions []*sparta.LambdaAWSInfo) []*sparta.LambdaAWSInfo {
  2008  	lambdaFn, _ := sparta.NewAWSLambda(sparta.LambdaName(echoCloudWatchLogsEvent),
  2009  		echoCloudWatchLogsEvent,
  2010  		sparta.IAMRoleDefinition{})
  2011  </code></pre></div><p>The next step is to add a <code>CloudWatchLogsSubscriptionFilter</code> value that represents the <a href="http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/Subscriptions.html#LambdaFunctionExample">CloudWatch Lambda</a> subscription <a href="http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/CreateSubscriptionFilter.html">filter information</a>.</p>
  2012  <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go">cloudWatchLogsPermission := sparta.CloudWatchLogsPermission{}
  2013  cloudWatchLogsPermission.Filters = make(<span style="color:#00f">map</span>[<span style="color:#2b91af">string</span>]sparta.CloudWatchLogsSubscriptionFilter, 1)
  2014  cloudWatchLogsPermission.Filters[<span style="color:#a31515">&#34;MyFilter&#34;</span>] = sparta.CloudWatchLogsSubscriptionFilter{
  2015    LogGroupName: <span style="color:#a31515">&#34;/aws/lambda/versions&#34;</span>,
  2016  }
  2017  </code></pre></div><p>The <code>sparta.CloudWatchLogsPermission</code> struct provides fields for both the LogGroupName and optional Filter expression (not shown here) to use when calling <a href="http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/CloudWatchLogs.html#putSubscriptionFilter-property">putSubscriptionFilter</a>.</p>
  2018  <h2 id="add-permission">Add Permission</h2>
  2019  <p>With the subscription information configured, the final step is to add the <code>sparta.CloudWatchLogsPermission</code> to our <code>sparta.LambdaAWSInfo</code> value:</p>
  2020  <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go">lambdaFn.Permissions = append(lambdaFn.Permissions, cloudWatchLogsPermission)
  2021  </code></pre></div><p>Our entire function is therefore:</p>
  2022  <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"><span style="color:#00f">func</span> appendCloudWatchLogsHandler(api *sparta.API,
  2023  	lambdaFunctions []*sparta.LambdaAWSInfo) []*sparta.LambdaAWSInfo {
  2024  
  2025  	lambdaFn, _ := sparta.NewAWSLambda(sparta.LambdaName(echoCloudWatchLogsEvent),
  2026  		echoCloudWatchLogsEvent,
  2027  		sparta.IAMRoleDefinition{})
  2028  	cloudWatchLogsPermission := sparta.CloudWatchLogsPermission{}
  2029  	cloudWatchLogsPermission.Filters = make(<span style="color:#00f">map</span>[<span style="color:#2b91af">string</span>]sparta.CloudWatchLogsSubscriptionFilter, 1)
  2030  	cloudWatchLogsPermission.Filters[<span style="color:#a31515">&#34;MyFilter&#34;</span>] = sparta.CloudWatchLogsSubscriptionFilter{
  2031  		FilterPattern: <span style="color:#a31515">&#34;&#34;</span>,
  2032  		<span style="color:#008000">// NOTE: This LogGroupName MUST already exist in your account, otherwise
  2033  </span><span style="color:#008000"></span>		<span style="color:#008000">// the `provision` step will fail. You can create a LogGroupName in the
  2034  </span><span style="color:#008000"></span>		<span style="color:#008000">// AWS Console
  2035  </span><span style="color:#008000"></span>		LogGroupName:  <span style="color:#a31515">&#34;/aws/lambda/versions&#34;</span>,
  2036  	}
  2037  	lambdaFn.Permissions = append(lambdaFn.Permissions, cloudWatchLogsPermission)
  2038  	<span style="color:#00f">return</span> append(lambdaFunctions, lambdaFn)
  2039  }
  2040  </code></pre></div><h1 id="wrapping-up">Wrapping Up</h1>
  2041  <p>With the <code>lambdaFn</code> fully defined, we can provide it to <code>sparta.Main()</code> and deploy our service.  The workflow below is shared by all CloudWatch Logs-triggered lambda functions:</p>
  2042  <ul>
  2043  <li>Define the lambda function (<code>echoCloudWatchLogsEvent</code>).</li>
  2044  <li>If needed, create the required <a href="https://godoc.org/github.com/mweagle/Sparta*IAMRoleDefinition">IAMRoleDefinition</a> with appropriate privileges.</li>
  2045  <li>Provide the lambda function &amp; IAMRoleDefinition to <code>sparta.NewAWSLambda()</code></li>
  2046  <li>Create a <a href="https://godoc.org/github.com/mweagle/Sparta#CloudWatchLogsPermission">CloudWatchLogsPermission</a> value.</li>
  2047  <li>Add one or more <a href="https://godoc.org/github.com/mweagle/Sparta#CloudWatchLogsSubscriptionFilter">CloudWatchLogsSubscriptionFilter</a> to the <code>CloudWatchLogsPermission.Filters</code> map that defines your lambda function&rsquo;s logfile subscription information.</li>
  2048  <li>Append the <code>CloudWatchLogsPermission</code> value to the lambda function&rsquo;s <code>Permissions</code> slice.</li>
  2049  <li>Include the reference in the call to <code>sparta.Main()</code>.</li>
  2050  </ul>
  2051  <h2 id="other-resources">Other Resources</h2>
  2052  
  2053  
  2054  <footer class="footline">
  2055  	
  2056  </footer>
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