Ansible Automation — Configuration Management That Scales with Your Team
Ansible bridges the gap between provisioning infrastructure and configuring it. While Terraform creates your servers, Ansible installs packages, configures services, deploys applications, and enforces configuration consistency across your fleet. We write idempotent playbooks and reusable roles that automate the repetitive tasks eating your team's time.
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When Ansible Is the Right Tool
Ansible excels at configuration management and application deployment on existing servers. If you have EC2 instances, bare metal servers, or VMs that need consistent configuration — packages installed, services running, files in the right place with the right permissions — Ansible is the tool. It is agentless (uses SSH), requires no infrastructure of its own, and uses YAML syntax that operations and development teams can both read.
Common use cases we implement: hardening new servers with security baselines (SSH config, firewall rules, fail2ban, unattended upgrades), deploying applications with zero downtime (serial rolling deploys across a fleet), managing Nginx/Caddy configurations with SSL certificates, setting up monitoring agents (Prometheus node exporter, Datadog agent), and running database maintenance tasks on schedules.
Ansible is not a replacement for Terraform. They complement each other. Terraform provisions the infrastructure (VPCs, instances, load balancers). Ansible configures what runs on that infrastructure. Trying to use one tool for both jobs leads to pain. We set up both and wire them together when clients need the full stack.
Our Ansible Implementation
We structure your Ansible project using the standard directory layout with roles, inventories, and group variables. Each role handles a single concern — common (base packages, users, SSH hardening), docker (Docker engine and compose), nginx (reverse proxy with SSL), monitoring (Prometheus exporters), app-deploy (your application deployment).
Inventories are organized by environment with group variables holding environment-specific configuration. Secrets are encrypted with Ansible Vault, and the vault password is injected from your CI/CD system's secret store — never committed to the repository. We use ansible-vault encrypt_string for inline secret encryption so the rest of your variable files remain readable.
Every playbook is idempotent — running it twice produces the same result. We use handlers for service restarts, changed_when and failed_when for accurate change tracking, and check mode support so you can dry-run any playbook safely. Molecule is configured for role testing, running each role against a Docker container to verify it works before production deployment.
For CI/CD integration, we set up a pipeline that lints playbooks with ansible-lint, runs Molecule tests, and executes playbooks against staging on merge. Production runs require manual approval. The pipeline uses dynamic inventory from your cloud provider so new instances are automatically discovered without manual inventory updates.
What You Get
A complete Ansible automation framework for your infrastructure:
- Role-based architecture — reusable, tested roles for each configuration concern
- Environment inventories — dev, staging, production with dynamic cloud discovery
- Vault-encrypted secrets — database passwords, API keys, and certificates encrypted at rest
- Molecule tests — automated role testing against Docker containers in CI
- CI/CD pipeline — lint, test, and deploy playbooks with approval gates
- Server hardening playbook — SSH, firewall, fail2ban, automatic updates, audit logging
- Application deployment playbook — zero-downtime rolling deploys with health checks
- Runbook — how to add new roles, onboard new servers, and troubleshoot common issues
Why Anubiz Engineering
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