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Kubernetes
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Design Patterns

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Kubernetes
Apache Kafka
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Design Patterns

Showing posts from January, 2021

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Kubernetes for Developers #7: Imperative vs. Declarative Kubernetes Objects

on January 18, 2021

kubectl +0 kubernetes

kubectl kubernetes

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Rama Subba Reddy Mukkamalla: Expert in System Design, Application Architecture, Event-Driven Solutions | AWS Certified Solution Architect | Tech Blogger

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Kubernetes for Developers #10: Kubernetes Pod YAML manifest in-detail

In General, K8 resources are usually created using YAML or JSON manifest. YAML Structure : YAML is a Indentation based and superset of JSON, which means any valid JSON file is also a valid YAML file. There are two types of structures we mostly use. Map : It is key-value pair like Json Object. Ex : simple key-value structure where key and value are strings #yaml apiVersion : v1 kind : Pod #json { "apiVersion" : "v1" , "kind" : "Pod" } Ex : complex key-value structure where value act as another Map #yaml apiVersion : v1 kind : Pod metadata : name : pod-nginx #json { "apiVersion" : "v1" , "kind" : "Pod" , "metadata" : { "name" : "pod-nginx" } } List: It is sequence of values like Json Array represented using...

Kubernetes for Developers #1: Kubernetes Architecture and Features

Kubernetes(K8) is an open-source container orchestration tool used for automating deployment, scaling and management of containerized applications. Features: 1. Self-Healing : It restarts container that failed or kills the container that do not respond to container health check endpoint. It always maintains user defined number of replicas 2 . Secret and configuration management : It maintains an application level configuration and secrets in a separate location. So, it can be modified without re-building and deploying container 3. Horizontal scaling: It is easy to scale-up/down containers with a simple command or automatically based on CPU usage. 4. Automatic bin packing: It automatically places containers into the required Worker nodes based on specified CPU/Memory. 5. Storage orchestration : It allows to mount a local storage or cloud providers 6. Automated rollouts and rollbacks: It allows to rollout new application changes by spinning up new container without killing existing conta...

Kubernetes for Developers #4: Enable kubectl bash autocompletion

Kubectl provides autocomplete support for bash which can save us lot of typing. Bash on Windows using Git bash 1. Install Git bash from https://git-scm.com/downloads if it is not available in your computer 2. Navigate to “C:\Users\<yourname>” from Git bash cli 3. Run following command to get kubectl autocompletion bash commands and save into “kubectl-completion.bash” file > kubectl completion bash > ~/kubectl-completion.bash 4. Create or Update .bashrc file source > echo 'source ~/kubectl-completion.bash' >> .bashrc 5. Restart Git bash and start typing kubectl get po ( press [TAB] key ) Bash on Windows using Conemu/Cmder It is an another handy multi and split tab windows terminal. It supports multiple command terminals like cmd, PowerShell, bash and etc. 1. Install Git bash from https://git-scm.com/downloads if it is not available in your computer 2. Install C...

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