The GIT Stack

The GIT stack is a lightweight, service-oriented architecture designed for teams that need tight control over deployment pipelines and runtime behavior without heavy orchestration overhead. GitLab serves as the central nervous system, handling version control, CI/CD automation, and artifact management across all services. When engineers push code, GitLab's pipelines compile, test, and package services, which are then staged for deployment. This creates a single source of truth for both application code and infrastructure state, reducing cognitive overhead across the team.

Istio handles the complexity of service communication at runtime. Once services are deployed, Istio's service mesh sits between them, enforcing network policies, managing traffic routing, and providing observability through distributed tracing. This allows the team to decouple application logic from networking concerns—services don't need to know about circuit breaking, retries, or mTLS; Istio handles it transparently. The mesh also feeds telemetry back into the pipeline, so deployment decisions can be informed by real production behavior.

Tmux provides the operational layer that ties everything together. Teams use tmux sessions to manage long-running monitoring dashboards, log aggregation, and manual interventions across multiple services. Rather than relying on heavyweight centralized monitoring platforms, operators can spin up tmux windows connected to various service instances, dashboards, and alert systems, maintaining direct visibility and control. This approach keeps the stack lean while preserving the ability for experienced engineers to diagnose and respond to issues quickly.