Executive Summary

This Case Study explores Advantages of Gitlab with Custom Runners and how KineticSkunk rebuilt its CI/CD systems by using a bespoke fleet of custom GitLab Runners to improve pipeline efficiency. The result? More than 70% faster validation, real time feedback, extra security, and a self-healing build pipeline. This GitLab Runner Case Study outlines how custom runners led to improved performance, making it a pattern for future CI/CD implementations.

Background and Objectives – GitLab Runner Case Study

As a DevOps and DevSecOps leader, operating across AWS, Azure, and Red Hat OpenShift, KineticSkunk needed to evolve beyond legacy Jenkins and static agents. The main goals were:

• Accelerate feedback loops on feature branches
• Secure builds using vault-managed credentials
• Scale automatically to handle test surges
• Standardize job templates across services

These objectives required a solution that can scale, have high availability without negatively impacting compliance or speed of development.

Key Challenges – GitLab Runner Case Study

The team faced several points that made rapid delivery difficult:

• Agent Pool Saturation: Shared runners could not handle spikes from heavy test jobs, especially Selenium and GenAI suites.
• Configuration Drift: Inconsistent tools led to brittle pipelines.
• Secrets Management: Needed secure, one time secret management during builds.
• Availability Risks: Single-AZ agents posed a risk to operations.

GitLab Auto-scaling Runner Solution Architecture

To tackle these problems, KineticSkunk adopted a robust architecture optimized for automation, consistency, and fault tolerance.

Gitlab Dynamic Agent Provisioning

Auto-scaling runners were deployed using Kubernetes and cloud VMs, triggered per-job and decommissioned afterward to ensure elasticity.

Gitlab Immutable Configuration Templates

All job definitions were consolidated into centrally managed YAML templates, preventing drift and promoting reusability.

Gitlab Secure Secret Injection

Integrated with HashiCorp Vault, pipelines retrieved time-limited tokens without storing sensitive data locally.
Learn more about HashiCorp Vault’s secrets engine and how it integrates with CI/CD systems.

Gitlab Multi-Zone Resilience

Runners spanned multiple availability zones, equipped with health checks and auto-recovery via a monitoring system to prevent outages.

Implementation Components

Component	Approach
Agent Pools	EKS pods and cloud VMs with cleanup hooks
Job Dispatch Logic	Pipeline tagging and workload prioritization
Configuration Store	Git-backed YAML templates and approval workflows
Observability	Real-time metrics, queue monitoring, and auto-scaling triggers

Results & Metrics

• Queue Reduction: 75% less wait time during traffic surges
• Runtime Efficiency: 60% faster execution across most jobs
• High Availability: >99.9% uptime, with no CI-induced outages
• Security Compliance: No persistent secrets, full audit trail verified

CI/CD Infrastructure Case Study Lessons Learned

• Template Governance: Enforcing shared YAML patterns removed 90% of configuration-related errors
• Autoscaling Lag: Reduced startup delay with leaner runner images
• Infrastructure Redundancy: Moving to multi-zone saved hours of downtime during an unplanned event

Conclusion

This GitLab Runner Case Study highlights how KineticSkunk successfully modernised its CI/CD infrastructure through custom, auto-scaling runners. By addressing core challenges like performance bottlenecks, secrets management, and infrastructure resilience, the team achieved measurable gains—cutting job runtimes by 60% and ensuring over 99.9% availability. The approach combined dynamic provisioning, Vault-based credential injection, and centralised configuration governance, setting a new standard for scalable, secure DevOps pipelines. As organisations continue to demand faster, safer software delivery, this case study proves the value of investing in tailored GitLab Runner solutions.

Explore Our DevOps & DevSecOps Solutions

Looking to optimize your CI/CD pipelines or enhance cloud security? Discover how our tailored solutions can drive efficiency, resilience, and compliance:

DevOps Solutions

• CI/CD pipeline design and automation
• Infrastructure as Code (IaC) using Terraform, Pulumi, or Ansible
• Cloud-native deployments on AWS, Azure, GCP
• Kubernetes orchestration and scaling
• Monitoring, logging, and observability systems

DevSecOps Solutions

• Secure pipeline design with integrated security checks
• Secrets management with Vault, AWS Secrets Manager, etc.
• Static and dynamic security testing (SAST/DAST)
• Compliance automation and audit readiness
• Container image scanning and policy enforcement

Learn more:
DevOps Solutions | DevSecOps Solutions