Jak skonfigurować i używać sieci Azure Event Grid dla architektury opartej na wydarzeniach

Wprowadzenie to do Azure Event Grid

Azure Event Grid is a fully managed even event routing services that they backbone for event-drift architectures in the cloud. It enenables different condigents of an application - whether they ary Azure services as, custem applications, or third-party systems - to communicate asynchronously by publishing andabonbing to events. Thi decoupling als systems to be more conficient, scalable, and responsive te te te te te te changes in real time.

In this guides, we will walk through gh the complete process of setting up and using Azure Event Grid. You will learn how to create topics, configuration a solid d foundation for building event- direcognity solutions in Azure.

Understanding Event- Driven Architectures

Traditional request-response architectures of ten create intrict coupling between services. When one services needs to notify others of a change, it mutt know when e each receiver is and how to call them. Thit leads to complex dependencies and brittle integrations. Event- context architectures solve this by proveling an intermediary - then event broker - that manages thee routing of events from producertas subscribers. Producers events to a tout withit intainf whinf will, them, and subscrimes, anvestér interess en events events events.

Azure Event Grid excels in this role because it is designed for massive scale and reliability. It supports both system events (like blob storage creation or resource group changes) and custorem events frem your own applications. The service automatically handles retries, dead-lettering, and filtering, so you can focus on contess logic rather than infrastructure plumbing.

Key Concepts of Azure Event Grid

Events

An event is a small piece of data that describes what happed. Each event contains a subit, event type, event time, and a data payload. For example, a storage account creation event might have thee subit 1; Event 3; FLT: 0 event 3; and event type behaftude 1; FLT: 1 erend 3; Events follow theme schema structure.

Tematy

A topic is an endpoint when e events are sent. It providees a namespace for events of a certain category. You can create system topics for Azure resources (like a storage account or resource group) or custom topics for your own applications. Topics are regional resources, so you mutt choose a region during creation.

Event Subscriptions

Subscriptions definiuje dlaczego subskrybenci chcą subskrybenta to receive and how they should be delivered. You can filter events based on sub, event type, or data fields. Subscripts also deceify thee endpoint type - condin options including de webhooks (HTTP endpoints), Azure Functions, Event Hubs, Service Bus queuees or topics, and Azure Logic Apps. Each subskryption have its own retry policy and demetter destinationinon.

Event Publishers

Any service or application that sends events to an Event Grid topic is a publisher. Publishers don 't need to know about subscribers; they simple poste events to thee topic endpoint. Azure SDKs, REST API, and CLI are revacable for publishing events.

Event Handlers

Te event handler is thee contesent that processes thee incoming event. Azure Event Grid supports several handler type: webhooks that respond to HTTP POST, Azure Functions, Automation runbook, Logic Apps, andd more. For webhooks, Event Grid requises a handshake te validate the endpoint before events are delivered.

Step- by- Step Setup of Azure Event Grid

Let 's go the practical steps to set up Azure Event Grid, frem creating a topic tu subskrybbing and d publishing events.

1. Stworzenie a Event Grid Topic

Navigate te Azure portal (reviden1; FLT: 0, 3; PRI3; PRI3; PRIV.azure.com presenta1; PRIVE 1; FLT: 1, 3; PRIVE 3;) and search clush for context; Event Grid. context; Click British 1; PRIVE 1; FLT: 2, PRIV3; Create British 1; PRIV1; FLT: 3, PRIV3; And secose Britionate 1; FLT: 4, PRIV3; Topitions; FLIC 3; FRIC 3; FRM the options. You will need to provide:

Opcjonalne, you can enable system- assigned managed identity or add tags for governance. After validation, click amend1; erend1; fLT: 0 memorial 3; event1; event1; event1; fLT: 1 metrid3; event3; event3. thee deployment takes a minute or two. once ready, you will see thee topic endpoint URL and an accorses key or SAS token in thee topic 's accort quet; section.

2. Stworzenie an event Subscription

With thee topic created, you need at t leaaset one subscription to receive events. In the topic 's overview page, click indiv1; endi1; FLT: 0 contribution 3; endiv3; + Event Subscription indiv1; endi1; FLT: 1 contribution 3; endiv3. provide:

Click present 1; Sig1; FLT: 0; Sig3; Create precendence 1; Sig1; FLT: 1 Sig3; Sig3; If you chose a webhook endpoint, Event Grid will send a validation request. Your endpoint mutt respond witt a validation code (often part of te handshake process) to confirm ownership. Once validated, events will flow.

3. Publishing Events

To publish events, you need the topic endpoint URL and an accessis key or SAS token. Thee event payload mutt follow the indic1; indic1; FLT: 0 contribution 3; envent Grid schema indic1; endic1; entis1; FLT: 1 contribution 3; indic3;. Here is a minimal example using thee Azure CLI:

az eventgrid event submit \
 --endpoint https://your-topic.westus-1.eventgrid.azure.net/api/events \
 --subject "custom/test" \
 --event-type "MyApp.NewRecord" \
 --data '{"id":123,"name":"test"}' \
 --key aabbccdd...

You can also use REST API, PowerShell, or SDKs (C #, Python, Java, Node.js). For serverless environments, Azure Functions can publish events via an output binding.

4. Handling Events wigh Azure Functions

One of thee most combn wzocts is to use an Azure Function as an event handler. Create a new Azure Function App andd add an Event Grid trigger. The functionion will receive events as JSON. Here 's a simple C # example:

[FunctionName("ProcessEvent")]
public static void Run([EventGridTrigger] EventGridEvent eventGridEvent, ILogger log)
{
 log.LogInformation($"Received event: {eventGridEvent.EventType} with subject {eventGridEvent.Subject}");
 // Process the event data
}

Te funkcjonalne runtime automatically validates thee webhook handshake if you use Event Grid trigger binding. This approach gives you a scalable, serverless event procesor.

Advanced Scenariusze i wzory

Beyond basic setup, Azure Event Grid supports experimentated architectures. Here are several advanced us case:

Filtering andRouting

Use advanced filtering to route events based on data values. For example, you might have a topic that receives events frem multiple departments. You can cant separate subscriptions for quentile quentit; HR quentile quentil; events (filter on presents 1; flT: 4 contributions 3; flT exceptive quent; events. Thi ensures each handler only processes contribulent events, reducing load and simplifying logic.

Event Grid Domains

When you need to manage many topics for different tenants or applications, Event Grid Domains provide a hierarchical namespace. Each domayn can contain multiple topics, and you can appety policies, authentiation, and monitoring at te domail level. This is ideal for SaaS providers who offer event services multiple customers.

Hybrid and- Multi- Cloud Integration

Event Grid can connect to external systems using webhooks. You can send events to on- premises systems via combird connections, or tu tec other cloud providers using public HTTP endpoints. For security, use managed identities andd SAS tokens to authentivate outgoing calls. Also, consider using Azure Arc to manage on- premises resources with Event Grid.

Integration with Azure Logic Apps

Logic Apps can consume Event Grid events a trigger, enabling low-code workflows. For example, when a new blob is created in storage, a Logic App can automatically copy it to anotherr location, send an email, or update a datase. Thee visaal designer makes itt easy to build d complex orchestrations with out writing code.

Bett Practices for Production Deployments

Tu ensure your Event Grid solution is reliable, secre, and cost- effective, follow these best praktyces:

Kwestie bezpieczeństwa

Security in event- drivn systems has several layers:

Cost Management

Azure Event Grid pricing is based on thee number of operations (published events and delivery delites) and the e number of topic / subscription resources. Tu optimize costs:

Monitoruj your usage via Azure Cost Management and set budgets or alerts to avoid unexpected bills.

Monitoring andd Troubleshooting

Azure Monitoror provides conclussive metrics for Event Grid. Key metrics include:

You can also enable diagnostic logs for thee topic and subscription. Logs capture details about each publish and delivery operation, including error codes and latency. Usie Log Analytics queries to correlate failures with specific event types.

Common troubleshooting steps:

Integration wigh Other Azure Services

Azure Event Grid pracuje natively with many Azure services. Here are a few contron integrations:

Te power of Event Grid lies in it s ability to connect these dispate services with minimal code.

Real- Worlds Example: Serverless Order Processing

Imaginane an e-commerce platform that processes orders. When a customer places an order, thee web app publishes an event to an Event Grid topic: inde1; ende1; FLT: 5 contex3; index3; with data like order ID, customer info, and items. Three subscriptions are configured:

  1. Xiv1; Xiv1; FLT: 0 Xiv3; Xiv3; Inventory Service Xiv1; Xiv1; FLT: 1 Xiv3; Xiv3; (Azure Function): Reserves stock andd updates Inventory datase.
  2. Xi1; Xi1; FLT: 0 Xi3; Xi3; Payment Service Xi1; Xi1; FLT: 1 Xi3; Xi3; (Logic App): Processes payment via a third-party gateway.
  3. Xi1; Xi1; FLT: 0 Xi3; Xi3; Notification Service Xi1; Xi1; FLT: 1 Xi3; Xi3; (Webhook to SendGrid): Sends confirmation email to the customer.

Each subscription filters by even type andsumit, so they only receive relevant events. If thee payment services fairs, retries are delited; after exclusive te event is deadly-lettered for manual intervention. Thee entire system is decouppled: thee web app doesn 't need to know about thee downstream services. New services can by added later by simplity concreation a new subscription.

Ograniczenia i alternatywy

While Azure Event Grid is powerful, it has some consilints:

Choose Azure Event Grid when you need a simple, serverless event router with pub / sub semantics. For event streaming or ordered delivery, combinane it with tell Azure messaging services.

Konkluzja

Azure Event Grid is a foundationol services for building modern event-dropn applications in thee cloud. By decoupling producers from consumers, it enables architectures that are scalable, dimenent, and easyy to extend. Setting it up involves creating a topic, one or more subscriptions, and a handler to process events. Bess practiones like deadly-lettering, filtering, idepotent handlers, and moning ensure production readiness.

Whether you are e automating infrastructures, connecting microservices, or building a real-time notification system, Event Grid provides a robust, cost- effective even routing layer. Start small, embrace thee event- conduct mindset, and gradually expand your message- based workles. Thee explicbility and integration with the larger Azure ecosystem make Event Grid a go- to choice for developers and architectes alike.

For further reading, exploore the official ail 1; Xi1; FLT: 0 Xi3; Xi3; Azure Event Grid documentation Xi1; Xi1; FLT: 1 Xi3; Xi3; and the e Xi1; Xi1; FLT: 2 Xi3; Xi3; Event schema reference XiVe; XiV1; FLT: 3 XiV3; XiV3; FLT: 3; XiViVE;