DEV Community: Minh Tri Vo

🧱 Deploying AKS the Right Way – No Scripts, Just Portal

Minh Tri Vo — Tue, 08 Jul 2025 15:03:43 +0000

🧱 Deploying AKS the Right Way – No Scripts, Just Portal

If you've ever deployed an AKS cluster with a public IP and thought "this can't be production-ready," you were right.

In this in-depth guide, I show you how to build a secure, scalable, and enterprise-grade AKS architecture — using only the Azure Portal.

🔐 What you’ll get:

Hub-and-Spoke VNet topology

Azure Firewall & Bastion integration

Private ACR + Key Vault with Private Link

Application Gateway Ingress Controller (AGIC)

System & user node pools

Internal + External service exposure

Azure Monitor with Prometheus

Route tables, peering, and DNS setups explained

✅ Everything is configured step by step, visually, and tested. No AI shortcuts — just real engineering decisions built on Azure best practices.

🔗 Full Guide: https://technostress.blog/aks-azure-enterprise-deployment-guide/

Let me know what you think — or share how you’re securing your own AKS setup!

See Inside Your Apps: Real-World Observability with ELK APM (Spring Boot & Flask)

Minh Tri Vo — Sun, 01 Jun 2025 12:03:04 +0000

Have you ever shipped new code—only to get hit with mystery slowdowns or error reports, and your logs are just… silent?
It’s time to stop flying blind!

In my latest guide, I’ll show you how I turned Spring Boot and Flask apps from black boxes into crystal-clear dashboards using ELK APM.

✨ What’s inside?

🛠️ Step-by-step setup for the ELK stack & APM Server (with a real-world architecture map)

💻 Hands-on instrumentation for Java and Python (Spring Boot & Flask)

📊 Live tracing, resource metrics, and error monitoring in Kibana

If you want to save hours debugging, spot bottlenecks before users do, or just flex your full-stack monitoring skills, this walkthrough is for you.

👉 Dive into the complete guide here:
https://technostress.blog/monitor-spring-flask-elk-apm/

🚀 Auto-Deploy a Flask App on Azure VM Using Cloud-Init

Minh Tri Vo — Sat, 24 May 2025 14:02:27 +0000

Tired of spinning up VMs and manually configuring everything afterward?
This guide shows you how to automate the entire post-deployment process using Cloud-Init on Azure — from boot to running app, all in one go.

In this post, you'll learn how to:

Provision an Ubuntu VM with az CLI

Use cloud-init.yaml to install system dependencies

Clone a Flask app directly from GitHub

Configure it as a systemd service

Open port 8080 via UFW for external access

🚀 The result? A fully working web app right after VM creation — no SSH, no setup hassle.

👉 Read the full guide here:
https://technostress.blog/auto-deploy-flask-app-azure-vm-cloud-init/

🌿 Saving the Planet One Pod at a Time: Automating Sleep in Kubernetes with kube-green

Minh Tri Vo — Thu, 22 May 2025 15:29:50 +0000

Let’s face it—most of us leave our dev clusters running 24/7.
Test workloads idle overnight. Staging pods sip cloud credits through the weekend.
It’s easy to forget that “always on” often means “always wasting.”

In this post, I’ll walk you through a hands-on demo using kube-green, an open-source controller that lets you automatically scale down Kubernetes Deployments after hours—and bring them back when it’s time to work.

✅ No cron jobs
✅ No custom scripts
✅ Just clean, scheduled resource savings

Whether you’re trying to cut cloud costs, reduce carbon usage, or build more responsible DevOps pipelines—this tool makes it dead simple.

Let’s put your pods (and your wallet) to sleep—on purpose.

👉 Read the full guide on: https://technostress.blog/kube-green-kubernetes-auto-sleep-pods/

Your kubeadm certs expired, you renewed them… and now kubectl is broken?

Minh Tri Vo — Sat, 10 May 2025 15:28:23 +0000

Ran kubeadm certs renew all — and now locked out with:
memcache.go:265 – the server has asked for the client to provide credentials
Yep, your kubeconfig is still using expired certs.

🔧 This quick guide walks you through:

Regenerating your admin kubeconfig

Restarting the API server (static pod)

Restoring full access to your Kubernetes cluster

👉 Read the fix → https://technostress.blog/technostress-blog-fix-kubernetes-cert-renewal-memcache-error/

🧠 Monitor Your Full LAMP Stack with ELK + Metricbeat (No Guesswork, Just Data)

Minh Tri Vo — Sun, 04 May 2025 05:37:22 +0000

If you’re running a traditional LAMP stack (Linux, Apache, MySQL, PHP), chances are you’ve dealt with “Is the server slow?” moments.

But guessing is not monitoring.

In this post, I break down how to get full-stack observability using the ELK Stack (Elasticsearch + Kibana) combined with Metricbeat — all open-source, and built for clarity.

What You'll Learn:
✅ How to monitor Apache, MySQL, and system-level metrics in real time
✅ How to deploy Metricbeat agents on app and DB servers
✅ How to visualize everything in beautiful Kibana dashboards
✅ How to simulate load and validate that your stack can handle real-world traffic

No expensive tools. No bloated monitoring suites. Just a clean, powerful setup you can build in a couple of hours.

👉 Read the full tutorial here:
https://technostress.blog/lamp-stack-monitoring-elk-metricbeat/

Let me know what tools you use to monitor your LAMP stack — or if you're moving to containers, I'd love to hear how you manage observability!

"Stop Wasting Time on Manual Elasticsearch Backups — Automate It with Python & S3"

Minh Tri Vo — Sun, 27 Apr 2025 15:54:38 +0000

Let’s be honest — nobody enjoys manual backups.
Especially when it comes to managing Elasticsearch snapshots.

I got tired of repetitive tasks, so I automated the entire process using Python and a lightweight S3-compatible storage. No fancy tools, no cloud bills — just simple, reliable automation.

If you're spending more than a minute thinking about backups, you're doing it wrong.

Here’s how to set it up once and forget about it forever 👇
https://technostress.blog/elasticsearch-backup-automation-python-s3/

🧩 Visualize Your Azure Dependencies in Real Time with Service Map

Minh Tri Vo — Mon, 21 Apr 2025 14:31:29 +0000

Troubleshooting across multiple Azure VMs and services?

Instead of chasing logs and guessing connections, try visualizing them.

With Azure Service Map, you can:

Automatically discover app-to-app & process-level dependencies
Spot hidden bottlenecks and ghost services
Visualize your entire infrastructure — in real time

🛠️ Includes a hands-on setup guide using Log Analytics + Dependency Agent.

👉 Read the full post here:

https://technostress.blog/azure-service-map-application-dependency-visualization/

Have you used Service Map or a similar tool? Curious how others handle dependency visibility in the cloud.

azure #devops #cloud #infrastructure #observability

🧩 Getting Started with Jinja2 Templates and Filters in Ansible (with Real Examples)

Minh Tri Vo — Sun, 20 Apr 2025 16:01:04 +0000

If you’re learning Ansible and want to go beyond static config files, this post walks through how to use Jinja2 templates and filters to make your automation more flexible and scalable.

In this post, I cover:
• What Jinja2 templates are and why they matter in real-world Ansible playbooks
• How to create dynamic configuration files using variables, loops, and conditionals
• Real examples: deploying MOTD banners, SSHD configs with different ports per group
• Useful filters like default, replace, ipaddr, sort, and how they clean up data
• Structure breakdown: Jinja2 file → YAML vars → output on managed hosts

If you’ve been copy-pasting configs between servers — or building overly repetitive playbooks — this guide can help simplify that with templating and filtering.

📎 Read the full tutorial here:
👉 Beginner’s Guide to Jinja2 Templates and Filters in Ansible

💬 I’d love to hear: how are you using Jinja2 in your Ansible projects? Or what’s your go-to filter in a messy variable situation?

ansible #jinja2 #devops #automation #linux #infrastructureascode #beginners

Automate Linux User Account Inventory with Ansible

Minh Tri Vo — Sat, 19 Apr 2025 14:47:17 +0000

I needed a quick way to get user account info from multiple Linux servers — without logging into each one.

So I put together a small shell script + Ansible playbook that:

Collects usernames, shells, UID, password expiry, etc.

Runs across your server group

Outputs CSV files for auditing

No extra agents, just SSH and a few lines of YAML.

👉 Full breakdown here:
https://technostress.blog/automate-user-account-inventory-across-linux-servers-using-ansible

Would love to hear how others are handling user audits at scale.