Apache ZooKeeper Training in Kraków, Poland

This training provides a comprehensive understanding of Apache ZooKeeper, a centralized service for maintaining configuration information, naming, synchronization, and group services in distributed systems. Designed for developers, DevOps engineers, and system architects, this hands-on course explores core concepts, architecture, configuration, and real-world use cases of ZooKeeper.

Introduction and ZooKeeper Fundamentals

• Introduction to Distributed Systems & the Need for ZooKeeper
• Overview of Apache ZooKeeper
• Use cases and benefits
• Core concepts (znodes, sessions, watches, ACLs)
• ZooKeeper Architecture
• Servers, clients, leader-follower model
• Write-ahead logs and atomic broadcast
• Znode Types and Structure
• Persistent, ephemeral, sequential
• Working with znodes
• Hands-On Lab

Clustering, Coordination, and Application Use

• ZooKeeper Ensemble Setup
• Configuring a multi-node cluster
• Understanding quorum and synchronization
• Cluster startup sequence and failure recovery
• Client Communication and Sessions
• Watches and event notifications
• Session lifecycle
• Distributed Coordination Patterns
• Leader election
• Locks and barriers
• Naming and configuration management
• Hands-On Lab

Advanced Operations, Monitoring, and Use Cases

• Security in ZooKeeper
• Authentication and Access Control Lists (ACLs)
• Role-based access control
• Monitoring and Logging
• ZooKeeper metrics and logs
• Using zkCli.sh, mntr, stat, and srvr
• Performance Tuning and Best Practices
• Tuning parameters (tickTime, initLimit, syncLimit)
• Handling split-brain and network partitions
• Real-world Use Cases
• Hands-On Lab