DevOps – Page 10 – ITFROMZERO

Monitoring tutorial - IT technology blog

How to Never Forget SSL and Domain Renewals Again with Prometheus Blackbox Exporter

By admin April 23, 2026

Forgetting SSL renewals is a basic mistake that damages your reputation. Here is a detailed guide to automating monitoring and alerts 15 days in advance using Prometheus Blackbox Exporter.

Docker

How to Safely Expose Docker Containers to the Internet via Cloudflare Tunnel (No Port Forwarding)

By admin April 23, 2026

Forget about Port Forwarding and DDNS worries. A detailed guide on using Cloudflare Tunnel to safely expose Docker containers, hide origin IPs, and get automatic SSL.

Monitoring

Self-hosting Grafana OnCall: Professional On-call Scheduling and Escalation for DevOps Teams

By admin April 23, 2026

Alerts flooding in at 2 AM but no one knows who's on duty? Discover how to self-host Grafana OnCall to automate schedules and professional incident management.

Linux

Say Goodbye to Cron Jobs: Switching to systemd Timers for Superior Task Scheduling

By admin April 22, 2026

Learn to use systemd Timers for Linux task scheduling as a replacement for Cron Jobs. A detailed guide on configuring auto-retries, centralized logging, and resource limits.

Docker

Kaniko: Building “Clean” and Secure Docker Images Without Root Privileges

By admin April 22, 2026

Build Docker images securely without root privileges or a Docker Daemon. A detailed guide on using Kaniko to optimize security and performance for your CI/CD pipelines.

Monitoring

Prometheus Blackbox Exporter: Monitor HTTP, DNS, TCP and SSL Certificate Expiry

By admin April 21, 2026

Prometheus Blackbox Exporter monitors websites, TCP ports, DNS resolution, and SSL certificates from the end-user's perspective — no agent installation required on each server. This guide covers installation, configuring HTTP/DNS/TCP modules, and setting up SSL expiry alerts integrated with Alertmanager.

Security

Turning Linux into a Database: Querying and Security Monitoring with osquery

By admin April 21, 2026

Stop struggling with Bash scripts. Learn how to use osquery to query the Linux operating system using SQL, making security monitoring and infrastructure management 10x more efficient.

Git

Mastering LF/CRLF Issues and Binary File Management with .gitattributes

By admin April 21, 2026

Don't let LF/CRLF line ending errors ruin your commit logs. Here's a guide to configuring .gitattributes to sync Windows and macOS environments while protecting binary files.

Database

Is Your PostgreSQL Disk Bloating? Pro Tips to Fix Bloat and Optimize Autovacuum

By admin April 21, 2026

PostgreSQL disk full due to Database Bloat? Learn how to optimize Autovacuum, use pg_repack, and REINDEX CONCURRENTLY to free up space without downtime.

Centos

OpenSCAP: The Automation ‘Weapon’ for PCI-DSS Security Audits on CentOS for DevOps

By admin April 21, 2026

Don't let security audits become a nightmare. Discover how to use OpenSCAP to automate vulnerability scanning and PCI-DSS compliance on CentOS/RHEL based on real-world DevOps experience.