$ cat "Infrastructure as Code (IaC) & GitOps.md"

Infrastructure as Code (IaC) & GitOps

We transform IT infrastructure into declarative, version-controlled code and implement GitOps workflows. We codify existing servers and cloud environments or architect new systems from scratch: networks, virtual machines, databases, and security policies are versioned in Git, tested, and provisioned automatically without manual console operations.

What We Do

  • Declarative Resource Provisioning (Terraform / OpenTofu):

    • Modular infrastructure stacks: virtual networks, subnets, firewall rules, compute instances, storage pools, and load balancers.
    • Multi-platform support: Proxmox VE, VMware vSphere, Yandex Cloud, Selectel, AWS, Hetzner, and OpenStack.
    • Resilient state management: remote terraform.tfstate storage in encrypted S3 with state locking via PostgreSQL / DynamoDB.

  • Configuration Management & OS Hardening (Ansible):

    • Development of modular, idempotent Ansible roles: baseline Linux hardening (SSH, firewall, Fail2ban, sudo) and high-load kernel sysctl tuning.
    • Automated application provisioning: PostgreSQL clusters, 1C:Enterprise server nodes, Nginx web tiers, and Docker runtimes.
    • Automated role testing in ephemeral containers via Molecule with strict linting (ansible-lint).

  • Golden Image Automation (Packer):

    • Automated builds of hardened base VM templates (Golden Images) with pre-installed packages and security updates.
    • Reduces VM provisioning time from tens of minutes to seconds.

  • GitOps & Continuous Delivery (CI/CD):

    • Automated pipelines in GitLab CI and GitHub Actions: syntax validation, security analysis (Trivy, tfsec, tflint), execution planning (plan), and peer-reviewed deployment (apply).
    • Enterprise secret management: native integration with HashiCorp Vault or encrypted in-repository secrets via Mozilla SOPS and age.

Technology Stack

  • Resource Provisioning: Terraform, OpenTofu, Terragrunt.
  • Configuration Management: Ansible, Molecule, Bash, Python.
  • Image Automation: HashiCorp Packer.
  • Platforms & Hypervisors: Proxmox VE, VMware ESXi/vCenter, Yandex Cloud, Selectel, Hetzner, OpenStack.
  • Security & Secrets: HashiCorp Vault, Mozilla SOPS, age, Trivy, tfsec.
  • GitOps & Delivery: GitLab CI, GitHub Actions.

Outcomes

  1. Infrastructure as a Single Source of Truth: 100% of system configurations tracked in Git with auditable commit history and zero manual ClickOps.
  2. Identical Staging & Production: Bit-for-bit staging environments spun up in minutes for safe testing.
  3. Rapid Disaster Recovery (DR): Entire infrastructure fleets recreated in an alternate facility or cloud via automated code execution.
  4. Reliable, Automated Deployments: Automated linting, vulnerability scanning, and plan review before any change is applied to production.
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