How to Use Ansible AWX: From Server Deployment to Zero-Downtime Releases

The Core of Deployment Automation and AWX's Role

Ansible AWX is an Ansible-based open-source IT automation platform that supports playbook execution, scheduling, and inventory management through a GUI and API. Its core value lies in reducing the repetitive work and errors of manual deployment while increasing deployment frequency and security through process standardization. In particular, since it uses agentless, host-based inventory, direct server-to-server communication enables simple and stable deployment.

Zero-Downtime Release Implementation Strategy

Zero-downtime deployment is implemented by combining L4 load balancer control with a health check API. Before deployment, calling the /healthcheck/l4out API changes the service status to out_of_service; the L4 then removes the server from the pool after 3 failures at 5-second intervals. Once deployment is complete, the /healthcheck API returns skp_healthcheck_ok, allowing the L4 to route traffic back in. This process is scripted using AWX's custom deployment feature and curl commands.

Kubernetes Operator and Scalability

The AWX Operator uses Kubernetes CRDs to define and manage AWX resources, supporting automatic replica creation and scaling. When installing via Helm chart, it can be configured to use a separate PostgreSQL instance according to internal company policy. In large-scale environments, tasks are distributed via Execution Environment to ensure performance and scalability, with plans to further enhance the tool's completeness through future Kubernetes integration and improved deployment history collection features.