Devops

Ever spent hours wrestling with an application that seems perfectly fine, only to hit a roadblock that feels completely invisible? Chances are, your application isn’t the problem. When deploying services on Oracle Cloud Infrastructure (OCI), connection failure is usually not a coding issue. It’s a network issue. Traffic, before it can reach your running code, must pass through a series of security checkpoints, each acting like a protective gate. The biggest mistake new users make is thinking that opening a port is a single action. In reality, OCI uses a layered security model, and if even one gate is closed, the connection fails. ...

Introduction When I first learned Kubernetes storage, my mental model was very simple. In real clusters, we, as developers, usually have a StorageClass configured by Kubernetes administrators. So the workflow I saw everywhere looked like this: flowchart TB A["User creates a PersistentVolumeClaim (PVC)"] --> B["Kubernetes calls the CSI provisioner"] B --> C["Storage system creates a new disk"] C --> D["Kubernetes creates a PersistentVolume (PV) automatically"] D --> E["PVC binds to the PV"] In other words: PersistentVolumeClaim is enough. ...

Introducing OneClickTLS: Generate Self Signed TLS and mTLS Certificates Instantly If you have worked with Kubernetes, Docker, microservices, or local HTTPS development, you already know how frustrating it is to generate self signed TLS certificates. Searching for OpenSSL commands, adjusting SAN values, fixing errors, and repeating the entire process again and again. After dealing with this pain for years, I finally built a tool that removes all the friction: https://oneclicktls.com ...

If you’ve ever worked with Docker Compose and encountered a situation where your container suddenly can’t see any files in a previously working mounted folder, you’re not alone. This issue can be especially frustrating when everything seems to work fine on the initial deployment, only to break inexplicably after redeploy. The Problem When a folder is bind-mounted into a Docker container using Docker Compose, it works correctly during the initial deployment. However, after a redeploy — particularly when triggered by automation tools like Portainer — the mounted folder inside the container becomes empty. ...