What are the main problems and obstacles you faced when transitioning the system architecture from monolithic to microservices?

When transitioning from monolith to microservices architecture, I faced several key challenges:

• Responsibility separation: It was necessary to clearly define service boundaries to avoid logic duplication and ensure independence.
• Data management: In microservices, each service often has its own database, complicating transactions and data consistency.
• Orchestration and communication: There was a need for reliable message exchange between services (REST, gRPC, message queues), as well as handling failures and timeouts.
• Monitoring and logging: It was required to implement centralized log and metric collection to monitor the state of multiple services.
• Deployment and CI/CD: Automating and coordinating the deployment of multiple independent components became complex.

These challenges require careful planning, choosing appropriate tools, and changing development and support processes.