How to properly organize work with Ansible on a large infrastructure (1000 servers)? How to run, how to manage?

To manage Ansible across an infrastructure of 1000 servers, it is important to ensure scalability, manageability, and reliability.

• Inventory: Use dynamic inventory (e.g., based on CMDB, cloud APIs, or consul services) to automatically obtain an up-to-date list of hosts.

• Grouping: Divide servers into logical groups (by roles, environments, geography) for targeted task execution.

• Parallelism: Configure the forks parameter in ansible.cfg (e.g., 50-100) to run tasks in parallel without overloading the network and controller.

• Execution: Use Ansible Tower / AWX for centralized management, scheduling, and monitoring of tasks. If Tower is unavailable, run through CI/CD pipelines with version control for playbooks.

• Configuration Management: Store playbooks and roles in version control systems (Git), use branching and code reviews.

• Idempotency and Checks: Write idempotent playbooks so that repeated runs do not break the system.

• Logging and Monitoring: Collect execution logs, analyze errors, and use callback plugins for integration with monitoring systems.

• Optimization: Use serial for phased updates to minimize risks.

Example of running with group restrictions and parallelism:

ansible-playbook -i inventory/production site.yml --limit webservers -f 50

This approach will allow efficient management of a large infrastructure with Ansible.