Getting started with Elasticsearch What is Elasticsearch? Elasticsearch is a search server based on Lucene. It provides a distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License What is Apache Lucene ?…
Helm Charts — And Why Raw YAML Gets Painful Fast Start With the Problem Imagine you’re deploying a simple web app to Kubernetes. You write a deployment.yaml, a service.yaml, maybe an ingress.yaml and a configmap.yaml. That’s already 4 files just for one app. Now imagine doing that for 10 microservices, across 3 environments (dev, staging,…
While developing Ansible playbook for my on project I have some one usecase regarding use variable of variable in ansible playbook. So I found some workaround as I described in my this article. Problem :- I am trying to access variables which is defined in `group_vars`. As we know variable defined in group_vars are accessible…
Check for Palindrome in Python A palindrome is a string that reads the same forwards and backwards, such as “racecar” or “madam”. This problem builds directly on string reversal. Simple Solution def is_palindrome(s): return s == s[::-1] # Examples print(is_palindrome(“racecar”)) # True print(is_palindrome(“hello”)) # False Case-Insensitive Check def is_palindrome_ci(s): s = s.lower().replace(” “, “”) return…
Terraform Workspaces vs Separate Directories: Which is Better for Dev/Prod? Managing multiple environments like Dev, Staging, and Production is one of the most common Terraform challenges. You have two main approaches: Workspaces and Separate Directories. Here is how they differ and when to use each. Terraform Workspaces Workspaces allow multiple state files within the same…
$this refers to the current object of the class and self refers to the current class itself.$this can not be used inside static function whereas self can be used inside static function. When we need to access static function and reference static member variable then we can’t access through $this because a property declared as…
Kubernetes Liveness & Readiness Probes The Core Idea Imagine you have a restaurant. The health inspector checks if the kitchen is safe to operate at all — that’s a Liveness Probe. The host at the door checks if the kitchen is ready to accept new orders right now — that’s a Readiness Probe. Kubernetes uses…
As Reliance Jio 4G launched cheapest data and voice calls plans with several benefits to the Mobile users. Everyone wants to take benefits of these plan. You have two options to take advantages of Reliance Jio 4G , Buy new Reliance Jio 4G sim or Port you number to Reliance Jio 4G using Mobile Number…
Run Jenkins build from command is very simple in Linux system. Jenkins has support to command line client that allows you to access Jenkins from command line. To Trigger Jenkins build from command line some prequiste are there Go to jenkins dashboard in Home page ( e.g http://localhost:8080/ ) -> Manage Jenkins-> Configure Global Security…
How to validate date format in shell script There are multiple ways you can validate date format in shell script. You can compare date format with regular expression or you can use inbuilt date command to check given date format is valid or not. I am sharing a simple date command to validate the date…
