Sidecar Design Pattern Tutorial with Examples for Software Developers & Beginners

In this video we will learn about Sidecar design pattern. This is the 6th design principle in Decomposition design pattern category for microservices.

This pattern is named Sidecar because it resembles a sidecar attached to a motorcycle. In the pattern, the sidecar is attached to a parent application and provides supporting features for the application. Deploy components of an application into a separate process or container to provide isolation and encapsulation. Sidecar pattern is about separating cross-cutting operations to reduce its complexity of services.

For example, there are several modules that we want to run for each Microservice like logging, messaging, monitoring etc.

This pattern can also enable applications to be composed of heterogeneous components and technologies. The sidecar also shares the same lifecycle as the parent application, being created and retired alongside the parent. As a sidecar is attached to a motorcycle, similarly in software architecture a sidecar is attached to a parent application and extends/enhances its functionalities. A sidecar is loosely coupled with the main application. The sidecar pattern is often used with containers and referred to as a sidecar container or sidekick container.

A sidecar service is not necessarily part of the application, but is connected to it. It goes wherever the parent application goes. Sidecars are supporting processes or services that are deployed with the primary application.

** Usage of this Design Pattern **
1. Use this pattern when your primary application uses a heterogeneous set of languages and frameworks.
2. Use this pattern when a component is owned by a remote team or a different organization.
3. Use this pattern when a component or feature must be co-located on the same host as the application.
4. Use this pattern when you need a service that shares the overall lifecycle of your main application, but can be independently updated.
5. Use this pattern when you need fine-grained control over resource limits for a particular resource or component.

** Advantages of Microservices **
1. A sidecar is independent from its primary application in terms of runtime environment and programming language, so you don't need to develop one sidecar per language.
2. The sidecar can access the same resources as the primary application. For example, a sidecar can monitor system resources used by both the sidecar and the primary application.
3. Because of its proximity to the primary application, there's no significant latency when communicating between them.
4. Even for applications that don't provide an extensibility mechanism, you can use a sidecar to extend functionality by attaching it as its own process in the same host or sub-container as the primary application.

** Chapter Timestamps **
0:00 Welcome to Sidecar design pattern
1:07 Agenda of tutorial
2:09 Introduction of Sidecar design pattern
3:54 Real world examples of Sidecar design pattern
9:32 Usage of Sidecar design pattern
10:50 Advantages of Sidecar design pattern
12:02 Summary of Sidecar design pattern
12:48 Next video on Gateway Api design pattern

#microservicedesignpatterns #sidecar #microservices

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[codeonedigest]

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[monis_learns]

Hello Sir, I have just started watching your videos. Thanks for posting good content.
BTW, you didn't post the link for the other video (bulk head) you referred to in the beginning 0:59 .