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Autonomous CLI Code & DevOps Agents on Cloud VMs

Deploying autonomous CLI coding agents on Linux VMs to diagnose conflicting server configurations, resolve SSL renewal failures, and automate complex DevOps troubleshooting

Autonomous CLI Code & DevOps Agents on Cloud VMs

Overview

A real-world implementation of autonomous CLI coding agents (such as OpenCode and Gemini CLI) deployed directly onto cloud Linux virtual machines to diagnose tangled infrastructure issues, resolve conflicting server configurations, and automate complex DevOps troubleshooting tasks.

The Problem

When inheriting a live WordPress production site previously configured by an external developer, a critical infrastructure failure occurred during routine maintenance:

  • Failing SSL Certificate Renewals: The domain's SSL certificate expired, but automated and manual Certbot renewal commands failed repeatedly with obscure verification errors.
  • Tangled Duplicate Configurations: The previous developer had created conflicting, duplicate virtual host and web server configuration files scattered across the system, creating silent routing conflicts.
  • Obscure Loopholes: Finding the exact configuration conflict manually was nearly impossible due to fragmented server blocks, symlink mismatches, and messy overrides.

The Solution

  • VM-Native CLI Agent Deployment: Installed and initialized an autonomous coding agent directly inside the target cloud Linux VM terminal.
  • Full System Context Ingestion: Provided the agent with complete context regarding the domain setup, web server structure, WordPress root directory, and failing renewal logs.
  • Autonomous Root-Cause Diagnostic: The CLI agent recursively inspected server directories, audited Nginx/Apache configuration directives, and pinpointed the duplicate configuration blocks causing the renewal failures.
  • Automated Remediation & Verification: The agent eliminated conflicting directives, unified the virtual host records, successfully executed the SSL certificate renewal, and reloaded the web services with zero downtime.

Business Impact & Results

  • Rapid Incident Resolution: Resolved a complex, multi-day DevOps blocker in minutes using autonomous agentic diagnostics.
  • Cleaned Infrastructure Debt: Replaced fragmented, duplicate configuration files with clean, maintainable server blocks.
  • 100% SSL & Uptime Restoration: Successfully renewed the SSL certificates and restored secure HTTPS traffic across all domains.