How Do Kubernetes Components Fit Together?
Kubernetes has a lot of moving parts, and I'm trying to understand how they connect. Could someone explain the roles of the kubelet, a Kubernetes cluster, Helm, and…
containers
How can I run an X11 application in an isolated Podman container on RHEL 10?
I'm running RHEL 10.2 with GNOME 49 and need to launch an X11 application from inside a Podman container that uses its own IP address and an internal…
How Does a Docker Container Run on a Computer?
When I start a Docker container, what is actually running on the computer? Is the container itself a separate program, or does the Docker Engine run as a…
How Do Docker Containers Actually Run on a Computer?
When I start a Docker container, what is really happening on the computer? Is the container itself running as a separate program, or is it contained inside the…
How Can I Run Kubernetes Containers Locally and Test Their Scalability?
I want to run containers locally in a Kubernetes-like environment so I can test how a service behaves when scaled up. Is there a practical way to create…
How Can I Run Kubernetes Containers Locally and Test Scaling?
I want to run Kubernetes workloads on my local machine so I can test how a service behaves when scaled up. Is there a way to create a…
Why Did My ROS 2 Docker Container Disappear After a Month?
I'm using a Raspberry Pi 4B with a container based on a ROS 2 image. I stepped away from programming for about a month while working on a…
What’s the best hands-on path for learning Kubernetes and Helm?
I recently started a DevOps-related role and need to learn Kubernetes, Helm, and the surrounding concepts. There are so many topics and resources that I'm unsure what to…
When Should an Individual Developer Use Docker?
Do developers typically run everything inside Docker containers, or is Docker mainly useful for specific projects and situations? I understand that containers package an application and its dependencies,…
When Should an Individual Developer Use Docker?
Do developers typically run everything inside Docker containers, or is Docker mainly used for specific projects and services? I understand that containers package an application together with its…
Backend Developer Moving Into Infrastructure: What Kubernetes Fundamentals Should I Learn First?
I'm a backend developer who recently moved into an infrastructure-focused role and am now working with Kubernetes, Key Vault, storage services, networking, and related cloud infrastructure. I'm comfortable…
What Kubernetes and infrastructure fundamentals should a backend developer learn first?
I'm a backend developer who recently moved into an infrastructure-focused role. I'm now working with Kubernetes, Key Vault, Storage Accounts, networking, and related cloud services, and I've realized…
Should I use Docker during development, deployment, or both?
I'm an informatics engineering student working on several projects by myself. I'm trying to understand when Docker is most useful: should I introduce it at the beginning of…
Should I Learn Kubernetes Vendor-Neutrally or Start With a Cloud Provider?
I've been working in IT for about 10 years and recently started learning containers with Docker Desktop on my laptop. I'm only a couple of weeks in, so…
Why does stopping an idle container take the full 10-second timeout?
On a Linux host, stopping an otherwise idle container can consistently take about 10 seconds. For example: `docker run -d --name sleeper alpine sleep 1000` `time docker stop…
Should I use one Docker Compose setup for both development and production?
I'm new to Docker and want to containerize a small Node.js project for learning, with the possibility of deploying it to a VPS later. The project may use…
Containers Return HTTP 200, but Browsers Time Out After an Update
After updating a container that serves a webpage, the site stopped loading in several browsers, even though it had worked previously. Browser requests eventually timed out, but curl…
What Does Docker Mean by a “Standard Unit of Software”?
I'm learning Docker and have been building a mental model of how it works: an image packages software and its dependencies into files, and the Docker daemon uses…
Should I use one PostgreSQL instance or separate ones for each application?
I'm moving my services from Unraid to LXC containers on Proxmox and taking the opportunity to tidy up the setup. Several of the applications need PostgreSQL, and I'm…
Should Two Dockerized Node.js Apps Share One PostgreSQL Instance?
I'm trying to understand what happens when running two applications with Docker. App 1 uses Node.js and PostgreSQL, and App 2 also uses Node.js and PostgreSQL. If both…