Rafael Medeiros – Medium

Rafael Medeiros

My ICA Exam Experience — What You Should Know Before Taking It

I recently took the Istio Certified Associate (ICA) exam. Here’s what the experience was like, what I found hard, and what helped me…

5d ago

My ICA Exam Experience — What You Should Know Before Taking It

5d ago

How I Passed the CAPA (Certified Argo Project Associate) Exam

CAPA exam isn’t easy, but it’s absolutely doable if you go in with the right preparation.

Jun 14

How I Passed the CAPA (Certified Argo Project Associate) Exam

Jun 14

How I Passed the LFCS Exam: Real Advice from My Second Attempt

Tips, tools, and what I wish I’d done differently before going to the exam

May 19

How I Passed the LFCS Exam: Real Advice from My Second Attempt

May 19

Critical Vulnerability in NGINX Ingress — CVE-2025–1974

NGINX Ingress Controller is a widely used Kubernetes component that manages external access to services within a cluster. It acts as a…

Mar 26

Critical Vulnerability in NGINX Ingress — CVE-2025–1974

Mar 26

Securing Pod Communication With Network Policies

Security in Kubernetes isn’t just about securing nodes and pods — it’s also about controlling network traffic between them. That’s where…

Mar 25

Securing Pod Communication With Network Policies

Mar 25

What is EKS Auto Mode? Kubernetes Management Simplified

Managing worker nodes in Kubernetes can be complex, requiring manual provisioning and scaling. But what if AWS managed it for you? EKS Auto…

Mar 18

What is EKS Auto Mode? Kubernetes Management Simplified

Mar 18

How to Fix Stuck Resources in Kubernetes

Ever tried deleting a namespace or a resource in Kubernetes, only to find it stuck in a terminating state? You run kubectl delete namespace…

Mar 13

How to Fix Stuck Resources in Kubernetes

Mar 13

Debugging a Crashed API Server in Kubernetes

Your cluster is broken, and your API server pod won’t come back up. You might notice that the kube-apiserver container appears for a moment…

Mar 11

Debugging a Crashed API Server in Kubernetes

Mar 11

Kubernetes Exit Codes Explained: How to Diagnose and Fix Failing Containers

You deploy your containerized application in Kubernetes, but then the pod has crashed unexpectedly. You check the logs and see an exit…

Mar 6

Kubernetes Exit Codes Explained: How to Diagnose and Fix Failing Containers

Mar 6

Dumping Jenkins Credentials — Don’t try this at 127.0.0.1, or try it!

I had a challenge these last days with one Jenkins instance because some of the secrets configured there were never documented; they…

Feb 11

Dumping Jenkins Credentials — Don’t try this at 127.0.0.1, or try it!

Feb 11

Rafael Medeiros

Rafael Medeiros

DevOps Engineer | CNCF Kubestronaut | 3x Azure Certified | Cloud & Security Enthusiast | Another IT professional willing to help the community

Following

Help

Status

About

Careers

Press

Blog

Privacy

Rules

Terms

Text to speech