Freaks City

A Kubernetes cluster requires atleast three CentOS 7 servers. One master node (hostname: master-k8s). Two worker nodes (hostnames: worker-k8s-01, worker-k8s-02). All steps in the Environment Preparation and Docker Installation sections must be executed on all three nodes: master-k8s, worker-k8s-01, and worker-k8s-02. Environment Preparation C ...

Since its launch, AWS Lambda has revolutionized application execution through its serverless computing model, enabling developers to run code without managing underlying servers, thus simplifying operational burdens. Initially, Lambda functions were deployed primarily as .zip packages, which limited their use in complex scenarios, especially wh ...

Install Docker following the official documentation for you're operating system. Docker Compose Setup Install Docker Compose according to the offciial installation guide. Service Configuration # docker-compose.yml configuration version: "3.8" services: kafka-manager: image: knowstreaming/knowstreaming-manager:latest co ...

The core mechanism behind Docker in Docker (DinD) involves spawning a fully independent Docker daemon inside an active container. The host container thus operates its own isolated Docker runtime, capable of building, shipping, and orchestrating child containers. While powerful, this pattern introduces extra resuorce consumption, potential secur ...

Introduction to Chrony Chrony is a versatile implementation of the Network Time Protocol (NTP). It enables synchronization of system clocks with NTP servers, reference clocks (such as GPS receivers), and even menual input via wristwatch and keyboard. Container Deployment 1) Container Image Overview By default, this container utilizes CloudFlare ...

On Linux systems, applications managed by systemd can be configured to start automatically on boot using systemctl enable. For Docker containers, the equivalent behavior is defined through the --restart flag when creating a container. The widely used option --restart unless-stopped is the key to automatic startup after a host reboot. The docker ...

Managing Docker Images The docker images command lists all locally stored Docker images. Key details include: REPOSITORY: Name of the image repository TAG: Version identifier; defaults to latest if unspecified IMAGE ID: Unique identifier for the image CREATED: Time elapsed since creation SIZE: Disk space used by the image Common Image Operati ...

Docker Overview Virtualization technology has evolved significantly since the inception of operating systems. In the context of cloud-native computing, containers play a critical role in modern deployment architectures. Docker is an open-source project that provides an additional abstraction layer on Linux operating systems, enabling users to d ...

Introduction This article explains Docker network configuration. Official Documentation: https://docs.docker.com/engine/reference/commandline/network/ Default Network Settings When Docker starts, it creates a virtual bridge named docker0 and three default networks: bridge, host, and none. Network Mode Description bridge Assigns IP, etc ...

Understanding Docker Data Persistence When you create a container from an image, it starts with a fresh filesystem containing only the image layers. Any data written during the container's lifetime disappears when the container is removed, unless proper measures are taken. This presents a fundamental challenge: applications need persistent stor ...