Implementing Linkerd Service Mesh: Add Observability, Load Balancing, Micro Proxies

Content
 
Preface
 
Chapter 1: Introduction to Service Mesh
 
Evolution of Network Communication
 
The Monolithic Era
 
Birth of Microservices
 
Challenges in Microservices Era
 
Role of APIs
 
Service Mesh: A Paradigm Shift
 
The Evolution Continues
 
Genesis of Service Mesh
 
Why Service Mesh?
 
Challenges Addressed by Service Mesh
 
Rise of Service Mesh
 
Linkerd Core Components
 
Data Plane
 
Control Plane
 
Service Mesh in Modern Cloud Environment
 
Enhancing Cloud-Native Applications
 
Security in a Distributed Environment
 
Operational Excellence in the Cloud
 
Multi-Cloud and Hybrid Environments
 
DevOps and Agile Methodologies
 
Future Trends and Evolution
 
Case Study: Realized 10x Output using Linkerd
 
Entain Australia Overview
 
Challenges Prior Linkerd Adoption
 
Implementation of Linkerd
 
Business and Operational Benefits
 
Case Study: Scaling Cloud-Native Applications
 
Microsoft’s Xbox Cloud Gaming Overview
 
Infrastructure Challenges Prior Linkerd
 
Adopting Linkerd
 
Implementation and Benefits
 
Summary
 
Chapter 2: Linkerd Architecture: Up and Running
 
Introduction to Linkerd Architecture
 
Overview
 
Components of Control Plane
 
Components of Data Plane
 
Interplay of Components
 
Sample Usecase: Handling a User Request
 
Service Discovery in Linkerd
 
Essence of Service Discovery
 
How Linkerd Manages Service Discovery?
 
Service Discovery in Action
 
Handling Failure and Load
 
Load Balancing and Traffic Splitting
 
Load Balancing in Linkerd
 
Linkerd’s Traffic Splitting
 
Metrics, Logs and Dashboard
 
Metrics in Linkerd
 
Proxy Logs
 
Observability Tools in Linkerd
 
Popular Linkerd Integrations
 
Core Integrations
 
Extended Integrations
 
Summary
 
Chapter 3: Installing and Configuring Linkerd
 
Pre-installation and Setup Requirements
 
Pre-installation Requirements
 
Step-by-Step Installation of Linkerd
 
Linkerd Configuration
 
Injecting Proxies into Kubernetes
 
Additional Configuration Options
 
Upgrade Linkerd Version
 
Troubleshooting Installation and Configuration
 
Failed to Install Linkerd Control Plane
 
Data Plane Proxies Not Starting
 
mTLS Not Working
 
Services Not Discovering Each Other
 
Performance Degradation After Meshing Services
 
Linkerd Dashboard Not Accessible
 
Ingress Traffic Not Being Meshed
 
Best Practices - Installation, Updates and Configuration
 
Summary
 
Chapter 4: Securing Communication with Linkerd
 
Concept of Interservice Security
 
Overview
 
Interservice Security Challenges
 
mTLS Deep Dive
 
mTLS in Linkerd
 
How Linkerd Implements mTLS?
 
Working of Automatic mTLS
 
Benefits of Automatic mTLS in Linkerd
 
Challenges and Considerations
 
Multi-Cluster Links and Its Security
 
Multi-Cluster Links in Linkerd
 
Sample Program: Establishing Multi-Cluster Links
 
Security Considerations
 
Zero Trust Security
 
Key Principles of Zero Trust
 
Zero Trust in Kubernetes Cluster
 
Certificates and Identity Management
 
Brief Overview
 
Managing Certificates and Identity
 
Authorization Policy and Its Implementation
 
Understanding Linkerd\'s Authorization Policy
 
Implementing Authorization Policy
 
End-to-End Traffic Security
 
Enforce Automated mTLS
 
Secure Ingress and Egress Traffic
 
Kubernetes Network Policies
 
Define Service Profiles
 
Summary
 
Chapter 5: Advanced Traffic Management
 
Introduction to Traffic Management
 
Brief Overview
 
Necessity for Advanced Traffic Management
 
Prospects of Advanced Traffic Management
 
Organize Services and Traffic Routes
 
Implement Traffic Splits for Canary Deployments
 
Override Error Codes
 
Understanding Concept
 
Linkerd Facilitates Error Code Overriding
 
Sample Program: Overriding Error Codes
 
Create Service Profile
 
Apply the Service Profile
 
Timeouts in Action
 
Understanding Timeouts in Linkerd
 
Sample Program: Implementing Timeouts Strategy
 
Best Practices for Managing Timeouts
 
Load Balancing and Its Techniques
 
How Linkerd Facilitates Load Balancing?
 
Sample Program: Using Load Balancing Technique
 
Canary Deployments
 
Definition
 
Features
 
Sample Program:  Implementing Canary Deployments
 
Implement A/B Testing
 
Understanding A/B Testing
 
Sample Program: A/B Testing with Linkerd
 
Handling Peak Loads
 
Peak Load Management Approaches
 
Sample Program: Managing Peak Loads
 
Integrations with Tools
 
Integration with Jenkins
 
Integration with Prometheus
 
Integration with Jaeger
 
Summary
 
Chapter 6: Multi-Cluster Communication and Rollouts
 
Fundamentals of Multi-Cluster Communication
 
Necessity of Multi-Cluster Communication
 
What is Multi-Cluster Communication?
 
Impact of No Communication Between Clusters
 
Setting up Linkerd for Multi-Cluster
 
Configure Cluster Gateways
 
Link the Clusters
 
Service Mirroring
 
Strategies for Multi-Cluster Communication
 
Strategy 1: Traffic Management and Load Balancing
 
Strategy 2: Service Failover and High Availability
 
Strategy 3: Data Synchronization and Consistency
 
Strategy 4: Cross-Cluster Security and Policy Enforcement
 
Strategy 5: Observability and Monitoring Across Clusters
 
Strategy 6: Deployment and Rollout Management
 
Implementing Canary Rollouts Across Clusters
 
Understanding Canary Rollouts
 
Implementing Canary Rollout Across Clusters
 
Manage Stateful Apps in Multi-Cluster
 
Understanding Stateful Applications
 
Managing Stateful Applications in Multi-Cluster
 
Traffic Mirroring for Testing in Production
 
Understanding Traffic Mirroring in Production
 
Benefits
 
Implementing Traffic Mirroring in Production
 
Multi-Cluster Monitoring and Observability
 
Understanding Observability in Linkerd
 
Traffic and Performance Metrics
 
Resource Utilization
 
Network and Traffic Patterns
 
Reliability Metrics
 
Tracing and Diagnostic Data
 
Linkerd Performance Indicators
 
Integrate with Prometheus
 
Setup Grafana Dashboards
 
Monitoring Key Metrics and Indicators
 
Setup Alerts in Prometheus
 
Best Practices - Multi-Cluster Management
 
Summary
 
Chapter 7: Progressive Delivery and Ingress Integration
 
Introduction to Progressive Delivery
 
Overview
 
Core Components of Progressive Delivery
 
Potential Benefits of Progressive Delivery
 
Contribution to DevOps and Cloud Professionals
 
Pair Linkerd with Kubernetes Ingress
 
Ingress in Kubernetes with Linkerd
 
Steps to Pair Linkerd with Kubernetes Ingress
 
Manage Traffic Split for Progressive Delivery
 
Purpose of Traffic Split
 
Implementing Traffic Split with Linkerd
 
Introduction to Flagger
 
Overview
 
Installing Flagger
 
Flagger for Blue and Green Deployments
 
Implementation of Blue/Green Deployment with Flagger
 
Rollback Strategies in Progressive Delivery
 
Key Rollback Strategies
 
Implementation with Flagger and Linkerd
 
Best Practices - Progressive Delivery
 
Summary
 
Chapter 8: Building Micro Proxies with Rust
 
Introduction to Rust Programming
 
Benefits of Rust
 
Why Rust for Linkerd Proxies?
 
Setting up Rust Environment
 
Download and Install rustup
 
Update PATH Environment Variable
 
Verifying Installation
 
Update and Manage Versions
 
Understand Micro Proxies
 
Definition
 
Use in Service Mesh
 
Building Micro Proxies in Rust
 
Building a Rust-based Micro Proxy
 
Create a New Project
 
Edit Cargo.toml
 
Writing the Proxy Server Code
 
Run the Proxy
 
Sidecar Deployment
 
Integrate Rust Proxies into Linkerd
 
Containerize Micro Proxy
 
Deploy the Proxy as a Sidecar
 
Deploy Changes to Kubernetes
 
Verifying Integration with Linkerd
 
linkerd2-proxy
 
Introduction
 
linkerd2-proxy vs. Custom Rust-Built Micro Proxy
 
Utilize linkerd2-proxy in FusionCorp
 
Review Existing Services
 
Injecting linkerd2-proxy into Services
 
Configuring Traffic Routing
 
Enabling mTLS
 
Dashboard Utilization
 
Fine-Tuning Load Balancing and Traffic Management
 
Advanced Features
 
Enable High Availability of Micro Proxies
 
Best Practices - Rust, Micro Proxies and linkerd2-proxy
 
Best Practices in Working with Rust
 
Best Practices for Micro Proxies
 
Best Practices with linkerd2-proxy
 
Summary
 
Index
 
Epilogue
 
Preface
 
This capsule book is designed to provide DevOps teams, Networking Professionals, and Cloud Enthusiasts with the practical knowledge and skills required to set up and operate a robust service mesh with Linkerd. The book begins by demystifying the concept of service meshes, building a solid basis with an analysis of their evolution, key concepts, and the issues they face in modern cloud-native systems. It digs into Linkerd\'s architecture, explaining its components, features, and the seamless orchestration of microservices communication that it enables.
 
As readers progress through the chapters, they are taken step by step through the installation and configuration of Linkerd. The book focuses on actual implementation, guiding readers through imperative and declarative methods to ensure a complete comprehension of the setup process. The following chapters cover advanced subjects such as safeguarding interservice communications, configuring secure multi-cluster links, and implementing zero-trust authorization schemes in Kubernetes clusters. Topics includes how to organize services within Linkerd, manage error handling, retries, and timeouts, and implement effective multi-cluster communication and rollout strategies.
 
A key chapter is about Rust programming, emphasizing its importance in developing efficient and secure micro proxies. Readers learn how to construct, integrate, and optimize these proxies to improve their service mesh deployment.
 
The journey\'s conclusion provides readers with not only theoretical information, but also a hands-on comprehension of Linkerd. They become well-prepared to work around progressive delivery, high availability, and integration with a variety of cloud settings and tools. This book serves as a complete guide, transforming its readers into skilled architects of Linkerd-based service mesh solutions, prepared to face the dynamic challenges of modern cloud-native infrastructures.
 
In this book you will learn how to:
 
Grasp the essentials of service mesh technology, focusing on Linkerd\'s transformative role in it.
●       Uncover the architecture of Linkerd, understanding its components and operational dynamics.
●       Master the installation and configuration of Linkerd, ensuring a seamless setup process.
●       Learn to secure interservice communication, enhancing the reliability and safety of your network.
●       Explore multi-cluster communication strategies, enabling robust and efficient service interactions.
●       Delve into Rust programming for building high-performance, secure micro proxies in Linkerd.
●       Gain insights into advanced traffic management using Linkerd for optimal service routing.
●       Navigate the intricacies of progressive delivery for deploying updates with minimal user impact.
●       Discover the power of high availability in service meshes, ensuring uninterrupted service.
●       Develop proficiency in integrating and optimizing linkerd2-proxy, harnessing its full potential.