| 海外TECH |
DEV Community |
🍉 AWS CDK 101 -🥒 Cross region putEvents across accounts using Eventbridge for Event-Forwarder project |
https://dev.to/aws-builders/aws-cdk-101-cross-region-putevents-across-accounts-using-eventbridge-for-event-forwarder-project-1de2
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AWS CDK Cross region putEvents across accounts using Eventbridge for Event Forwarder projectBeginners new to AWS CDK please do look at my previous articles one by one in this series If in case missed my previous article do find it with the below links Original previous post at Dev PostReposted the previous post at dev to aravindvcyberAlso we have started to develop an open source project which we would be using to play around with refracting the architecture as well as learn cdk stuff at the same time we will provide something useful for our community Find more about this discussed in the article below Original project post at Dev PostReposted project post at dev to aravindvcyberevent forwarder Github repo Cross Account PutEvents Earlier in our article we have seen how to use custom Eventbridge and SQS by configuring an event rule and target which shifts the messages to sqs queue Original post at Dev PostReposted at dev to aravindvcyberBut in this article we will be using the default event bus only since we are trying to source the cloud formation events for the above mentioned project To start with we will be first discussing how to make the event bridge events be routed to an sqs queue in our main processor stack First let us get the reference to the default target bus in the processor regionexport const getDefaultBus scope Construct region string account string IEventBus gt return EventBus fromEventBusArn scope DefaultBus region account arn aws events region account event bus default Then we will create a target queue a processor queue for lambda trigger and processor dlq Since we have to use the queue and dlq construct multiple times let us refract them to some utils below export const dlqQueueProps retentionPeriod Duration days removalPolicy RemovalPolicy DESTROY export const normalQueueProps retentionPeriod Duration days removalPolicy RemovalPolicy DESTROY deliveryDelay Duration seconds visibilityTimeout Duration minutes export const generateDLQ scope Construct queueName string Queue gt return new Queue scope queueName dlqQueueProps queueName export const generateQueue scope Construct queueName string deadLetterQueue DeadLetterQueue Queue gt return new Queue scope queueName normalQueueProps queueName deadLetterQueue Let provision these necessary queues nowconst stackEventProcessorQueue generateQueue this stackEventProcessorQueue stackEventProcessorQueueDLQ const stackEventTargetDlq DeadLetterQueue queue generateDLQ this stackEventTargetDlq maxReceiveCount const stackEventProcessorQueueDLQ DeadLetterQueue queue generateDLQ this stackEventProcessorQueueDLQ maxReceiveCount Event Rule Let us now source these cloud formation events from the current regionconst stackEventsRule new Rule this stack events rule eventPattern detail stack id exists true source aws cloudformation eventBus And please remember this event pattern can be very extended to filter the relevant stack events only or source from all stacks like me and filter in the upcoming steps Event Rule target Now let us use the target dlq and processor queue to build our event rule target to wire up to the event rule which is defined above const stackEventTarget new aws events targets SqsQueue stackEventProcessorQueue retryAttempts deadLetterQueue stackEventTargetDlq queue stackEventsRule addTarget stackEventTarget From then on the processor queue will take over the events as per the projects we discussed above and we are not interested in that in this article Multi region or multi account cloud formation events processing What we have just seen is that we can source the events from the current region But what if we may need to pull the events from another region or even another account That is when we use the other stack part of the project which we will put into every account region pair and source the cloud formation events necessary for our project TargetBus cross account policy const remoteAccounts config get remoteAccounts split const remoteRegions config get remoteRegions split remoteAccounts map account string gt remoteRegions map region string gt new CfnEventBusPolicy this CrossAccountPolicy region account action events PutEvents eventBusName eventBus eventBusName principal account statementId Accept PutEvents From region account condition Here I have used an array of remote accounts or remote regions to be used allowed to forward events to the processor stack besides that you can be a little more restrictive by adding some conditions as per your requirement for security regions or to reduce unnecessary or unwanted resources accessing our target default bus Single region used for processing and storage ️And why we do why this is because of multiple reasons Need not deploy the complex processing setup in every region or accountsAlso this also means we are also not starving our environment much our solution scales up reaching the limits of the respective servicesEasily to inspect the processing stack in a particular region with xray cloudwatch and we could have a single dashboard with cloudwatch metrics and it will be easier for maintainableLightweight remote stacks are portable and we could very easily provision them in multiple regions or accounts with less footprint Remote stack configuration ️ Remote Eventbus RuleWith the similar approach used earlier we could extend this further in this remote stack by building an event bus rule and event bus target with a failed event queueconst targetAccount config get account const targetRegion config get region const targetBus getDefaultBus this targetRegion targetAccount const remoteBus getDefaultBus this props region props account const remoteStackEventsRule new Rule this remote stack events rule eventPattern detail stack id exists true source aws cloudformation eventBus remoteBus Remote Eventbus TargetAdding a dlq to the target like the processor stack once again but now we use an eventbus as the target which is the processor region default bus that we have referenced This should be able to connect and push messages even across regions into even different accounts Since we have already granted this using the policy above Also the event bus fails it puts into a regional dlq const remoteStackEventTargetDlq DeadLetterQueue queue generateDLQ this remoteStackEventTargetDlq maxReceiveCount const remoteStackEventTarget new aws events targets EventBus targetBus deadLetterQueue remoteStackEventTargetDlq queue remoteStackEventsRule addTarget remoteStackEventTarget Thus we can demonstrate how we would be able to pool cloud formation events across the region and even from different accounts This will be extremely useful when you build similar event driven solutions We will be talking about more similar engineering concepts as we refactor and refine the event forwarder project Keep following for similar posts on engineering with IaC primarily using AWS CDK and Serverless Also feel free to contribute to the progress of the below solution with your comments issues maybe you can also do a pr if you feel if can help our community event forwarder Github repoOriginal project post at Dev PostReposted project post at dev to aravindvcyberWe have our next article in serverless and IaC do check outThanks for supporting Would be great if you like to Buy Me a Coffee to help boost my efforts Original post at Dev PostReposted at dev to aravindvcyber |
2022-09-04 19:41:43 |
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医療介護 CBnews |
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latvia |
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BBC News - Home |
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