Linkerd overview in Microservices - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Linkerd in the context of microservices?

Linkerd is a service mesh that helps manage communication between microservices by providing features like load balancing, security, and observability without changing application code.

intermediate

How does Linkerd improve security between microservices?

Linkerd encrypts communication between services using mutual TLS (mTLS), ensuring data is secure and trusted without needing changes in the application.

intermediate

What role do proxies play in Linkerd's architecture?

Linkerd uses lightweight proxies deployed alongside each microservice instance to intercept and manage all network traffic, enabling features like retries, timeouts, and metrics collection.

beginner

Name two key observability features provided by Linkerd.

Linkerd provides detailed metrics and distributed tracing to help monitor service health and diagnose issues in microservice communication.

intermediate

Why is Linkerd considered lightweight compared to other service meshes?

Linkerd is designed to be simple and efficient, using minimal resources and easy installation, making it suitable for small to large scale microservice environments.

What primary problem does Linkerd solve in microservices?

A Manages communication between microservices

B Stores data for microservices

C Builds user interfaces

D Manages databases

Linkerd manages communication between microservices by providing features like load balancing and security.

Which security feature does Linkerd use to encrypt service communication?

A Mutual TLS (mTLS)

B OAuth

C API keys

D Firewall

Linkerd uses mutual TLS (mTLS) to encrypt and authenticate communication between services.

Where are Linkerd proxies deployed in a microservices environment?

A On a central server

B Inside the database

C Alongside each microservice instance

D Only on the client side

Linkerd deploys lightweight proxies next to each microservice instance to intercept traffic.

Which of the following is NOT a feature provided by Linkerd?

A Load balancing

B Distributed tracing

C Automatic retries

D User authentication UI

Linkerd does not provide user interface features like authentication UI; it focuses on service communication.

Why might a team choose Linkerd over other service meshes?

A Because it requires heavy resource usage

B Because it is lightweight and easy to install

C Because it replaces databases

D Because it builds mobile apps

Linkerd is known for being lightweight and simple to install, making it attractive for many teams.

Explain how Linkerd enhances security and reliability in microservice communication.

Think about how Linkerd protects data and handles failures between services.

Describe the architecture of Linkerd and how it manages traffic between microservices.

Consider the roles of proxies and control plane in Linkerd.