Sandip Bhowmik

Chef Architecture

How to install Chef Server, Workstation and Chef Client on Ubuntu 18.04

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Chef is a Ruby based configuration management tool used to define infrastructure as code. This enables users to automate the management of many nodes and maintain consistency across those nodes. Recipes declare the desired state for managed nodes and are created on a user’s workstation using the Chef Workstation package. Your recipes are distributed across nodes via a Chef server. A Chef client, installed on each node, is in charge of applying the recipe to its corresponding node. This guide will show you how to install and configure a Chef Server and Chef Workstation. We will also bootstrap a node to manage with Chef.

In this tutorial you will learn:

  • Install and Configure the Chef Server
  • Create Chef User and Organization
  • Install and Configure the Chef Workstation
  • Configure Knife and Bootstrapping a Client Node

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HDFS Architecture

How to install Hadoop on RHEL 8 / CentOS 8 Linux

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Apache Hadoop is an open source framework used for distributed storage as well as distributed processing of big data on clusters of computers which runs on commodity hardwares. Hadoop stores data in Hadoop Distributed File System (HDFS) and the processing of these data is done using MapReduce. YARN provides API for requesting and allocating resource in the Hadoop cluster.

The Apache Hadoop framework is composed of the following modules:

  • Hadoop Common
  • Hadoop Distributed File System (HDFS)
  • YARN
  • MapReduce

This article explains how to install Hadoop Version 2 on RHEL 8 or CentOS 8. We will install HDFS (Namenode and Datanode), YARN, MapReduce on the single node cluster in Pseudo Distributed Mode which is distributed simulation on a single machine. Each Hadoop daemon such as hdfs, yarn, mapreduce etc. will run as a separate/individual java process.

In this tutorial you will learn:

  • How to add users for Hadoop Environment
  • How to install and configure the Oracle JDK
  • How to configure passwordless SSH
  • How to install Hadoop and configure necessary related xml files
  • How to start the Hadoop Cluster
  • How to access NameNode and ResourceManager Web UI

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HAProxy Architecture

Install and Configure HAProxy on RHEL 8 / CentOS 8 Linux

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HAProxy or High Availability Proxy is an open source TCP and HTTP load balancer and proxy server software. HAProxy has been written by Willy Tarreau in C, it supports SSL, compressions, keep-alive, custom log formats and header rewriting. HAProxy is a fast and lightweight proxy server and load balancer with a small memory footprint and low CPU usage. It is used by large sites like Github, StackOverflow, Reddit, Tumblr, Twitter and others. It has become the most popular software load balancer and proxy server in the past years.

In this tutorial, you will get through the HAProxy installation and configuration on RHEL 8 / CentOS 8. We will install HAProxy on a single server and then install Nginx web server on the other servers. HAProxy will act as a load balancer for the Nginx web servers.

In this tutorial you will learn:

  • HAProxy Architecture and Concepts
  • Configure hosts file for name resolution
  • Install and Configure HAProxy
  • Install and Configure Nginx
  • Testing the Load Balancing feature
  • Access the HAProxy Stats URL

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Ansible Architecture

How to install and configure Ansible on Redhat Enterprise Linux 8

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This tutorial covers step by step installation and configuration of Ansible on Redhat Enterprise Linux 8.
Ansible is the leading Open Source configuration management system. It makes it easy for administrators and operations teams to control thousands of servers from central machine without installing agents on them.

In this tutorial you will learn:

  • Ansible Overview
  • Install and Configure Python
  • Set Password-less SSH
  • Install Ansible
  • Testing and Managing the Ansible

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Ubuntu UFW

How to configure firewall in Ubuntu 18.04

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A properly configured firewall is one of the most important aspects of the overall system security. By default Ubuntu comes with a firewall configuration tool called UFW (Uncomplicated Firewall).

UFW is a user-friendly front-end for managing iptables firewall rules and its main goal is to make managing iptables easier or as the name says uncomplicated. Ubuntu’s firewall is designed as an easy way to perform basic firewall tasks without learning iptables. It doesn’t offer all the power of the standard iptables commands, but it’s less complex.

In this tutorial you will learn:

  • What is UFW and its Overview.
  • How to Install UFW and Perform Status Check.
  • How to Use IPv6 with UFW.
  • UFW Default Policies.
  • Application Profiles.
  • How to Allow and Deny Connections.
  • Firewall Log.
  • How to Delete UFW Rules.
  • How to Disable and Reset UFW.

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Zookeeper Architectural Overview

How to install and configure Zookeeper in Ubuntu 18.04

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Zookeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
All of these kinds of services are used in some form or another by distributed applications.

In this article, we have explained the necessary steps to install and configure 3 Node Zookeeper Cluster with a definite quorum on Ubuntu 18.04.

In this tutorial you will learn:

  • What is Zookeeper and its Overview.
  • What is the Architecture of Zookeeper.
  • How to Configure the Zookeeper hosts and Add Zookeeper User.
  • How to Install and Configure Oracle JDK.
  • How to Configure and Setup the Zookeeper.
  • How to Configure Worker Nodes to join the Swarm Cluster.
  • How to Verify the Zookeeper Cluster and Ensemble.

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Docker Swarm Services

How to Configure Docker Swarm with multiple Docker Nodes on Ubuntu 18.04

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Docker Swarm is a container orchestration and clustering tool to manage Docker hosts, and is a part of Docker Engine. It’s a native clustering tool provided by Docker which provides high-availability and high-performance for your application.

The primary objective of Docker Swarm is to group multiple Docker hosts into a single logical virtual server—this ensures availability and high performance for your application by distributing it over a number of Docker hosts instead of just one.

In this tutorial you will learn:

  • What is Docker Swarm
  • How to Configure Hosts
  • How to Install and Run Docker Service
  • How to Configure the Manager Node for Swarm Cluster Initialization
  • How to Configure Worker Nodes to join the Swarm Cluster
  • How to Verify the Swarm Cluster
  • How to Deploy new Service on Swarm Cluster

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Namenode Web User Interface

How to install Hadoop on Ubuntu 18.04 Bionic Beaver Linux

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Apache Hadoop is an open source framework used for distributed storage as well as distributed processing of big data on clusters of computers which runs on commodity hardwares. Hadoop stores data in Hadoop Distributed File System (HDFS) and the processing of these data is done using MapReduce. YARN provides API for requesting and allocating resource in the Hadoop cluster.

The Apache Hadoop framework is composed of the following modules:

  • Hadoop Common
  • Hadoop Distributed File System (HDFS)
  • YARN
  • MapReduce

This article explains how to install Hadoop Version 2 on Ubuntu 18.04. We will install HDFS (Namenode and Datanode), YARN, MapReduce on the single node cluster in Pseudo Distributed Mode which is distributed simulation on a single machine. Each Hadoop daemon such as hdfs, yarn, mapreduce etc. will run as a separate/individual java process.

In this tutorial you will learn:

  • How to add users for Hadoop Environment
  • How to install and configure the Oracle JDK
  • How to configure passwordless SSH
  • How to install Hadoop and configure necessary related xml files
  • How to start the Hadoop Cluster
  • How to access NameNode and ResourceManager Web UI

Read more