DevOps & IT Infrastructure Mastery

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Holistic monitoring, PowerShell automation, SQL resilience, and battle-tested IaC templates for modern sysadmins

Table of contents

1. Introduction

In 2025, IT infrastructure demands resilience, automation, and proactive monitoring. Whether managing hybrid environments, securing databases, or ensuring seamless post-reboot operations, DevOps engineers and sysadmins need robust tools and strategies. This guide covers holistic IT audits, PowerShell automation, SQL monitoring on Linux, and ready-to-use IaC templates.

i The tools and scripts mentioned are cross-platform or have equivalents for Windows/Linux—always validate compatibility with your environment.

2. Holistic IT Infrastructure Audit – Key Areas

1. Monitoring – Use Zabbix or Prometheus + Grafana for real-time visibility into servers, networks, and apps.

2. Backups – Automate with Veeam (Windows) or BorgBackup (Linux). Test restores quarterly.

3. Alerting – Configure thresholds in Grafana or PagerDuty to avoid alert fatigue.

4. Resiliency – Implement Terraform for immutable infrastructure and Ansible for drift correction.

Tip Use our free checklist for infrastructure audits—covers 150+ checks for security, performance, and compliance.

3. PowerShell + RunOnce: Post-Reboot Automation

Automate post-restart tasks in Windows Server with this PowerShell + RunOnce template:

# Add to RegistryRunOnce Set-ItemProperty -Path "HKLM:SoftwareMicrosoftWindowsCurrentVersionRunOnce" -Name "PostRebootScript" -Value "powershell.exe -File C:ScriptsPostReboot.ps1" # Sample PostReboot.ps1 Install-WindowsUpdate -AcceptAll -AutoReboot Sync-DomainControllers Send-MailNotification -Status "Server patched and rebooted"

Typical use cases:

Automatic patching after security updates

Service restart sequencing

Post-maintenance validation checks

4. MSSQL on Linux Monitoring Stack

Monitor SQL Server on Linux using this open-source stack:

Filebeat – Ships SQL error logs and performance metrics

Wazuh – Correlates logs with security events (failed logins, config changes)

Grafana – Dashboards for query latency, deadlocks, and storage trends

Tip Use our prebuilt Grafana dashboard for MSSQL-Linux—tracks 20+ critical metrics out-of-the-box.

5. Infrastructure-as-Code Templates

Accelerate deployments with these battle-tested templates:

Tool Use Case GitHub Link

Terraform AWS/GCP resilient VM clusters infra-as-code/aws-3tier

Ansible Post-deployment hardening ansible/cis-benchmark

Docker SQL monitoring stack docker/mssql-monitoring

6. FAQ: DevOps & Infrastructure

How often should we test backups?

Weekly for critical systems (e.g., databases), monthly for others. Always test with partial/full restores.

Best alerting practices?

Follow the 3-alert rule: 1) Warning (early signs), 2) Error (action required), 3) Critical (immediate intervention). Route alerts to proper teams.

PowerShell vs. Bash for automation?

PowerShell for Windows-heavy environments (AD, Exchange), Bash for Linux/cloud-native tools. Consider Python for cross-platform scripts.

Free SQL monitoring tools?

Prometheus + SQL Exporter, Wazuh for security, and Grafana (free tier) for dashboards.

7. Summary

Modern IT infrastructure requires automation at every layer—from post-reboot scripts to cross-platform monitoring. Leverage the tools and templates shared here to build resilient, self-healing systems.

! Always test scripts and IaC templates in staging before production. Modify variables to match your environment!

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