Tag: Master

How to Install lsyncd on Ubuntu 20.04 LTS

Posted on November 25, 2020 by David Singer | Updated: September 14, 2023

Category: Tutorials | Tags: Apache, File Synchronization, High Availability, Load Balancing, lsyncd, LTS, Master, Nodes, Remote, Replication, rsync, Slave, SSHKeys, synchronization, Ubuntu, Vim, Web Server

Reading Time: 4 minutes

What is lsyncd?

lsyncd is a rsync-based tool that monitors specified directories (including subdirectories) for updates and modifications, and then syncs those changes to a specified destination. It is a lightweight command application that is easy to install and configure using the popular Lua language.

Continue reading →

How To Install Apache Spark on Ubuntu

Posted on September 16, 2020 by Justin Palmer | Updated: March 8, 2021

Category: Tutorials | Tags: Apache Spark, Big Data, Cluster Computing, Clustering, Clusters, Data Driven Applications, Data Processing, Data Science, Distributed Systems, Environment Variables, Framework, HA Cluster, Hadoop, Java, local, Machine Learning, Master, Pyspark, Scala, Shell, Spark, Spark Shell, Web Interface, Worker

Reading Time: 6 minutes

What is Apache Spark?

Apache Spark is a distributed open-source, general-purpose framework for clustered computing. It is designed with computational speed in mind, from machine learning to stream processing to complex SQL queries. It can easily process and distribute work on large datasets across multiple computers.

Continue reading →

How to Install SaltStack on Ubuntu 20.04

Posted on March 26, 2020 by Ellen Sletton | Updated: July 6, 2023

Category: Tutorials | Tags: Automation, Configuration, Configuration Management Framework, Infrastructure, M2Crypto, Master, Minion, Open Source, Platform, PyCrypto, Python, Salt, Salt Master, Salt Minion, SaltStack, Task Execution, Ubuntu, Ubuntu 18.04, Vim

Reading Time: 6 minutes

What is SaltStack?

SaltStack is an open-source infrastructure management platform built on a dynamic communications bus. The main structure of SaltStack contains two main components for work: one Salt Master and several Salt Minions. Salt Master is the main control system used to send commands to Salt Minion and their configuration. Salt Minions (they are also called Nodes) are subsystems that work on managed servers and receive commands from the master, as well as their configuration. At least two servers are required for interaction settings. One for the Master and one for the node. All nodes are configured in the same way.

Continue reading →

How to Sync Two CentOS 8 Servers Using File Replication

Posted on February 13, 2020 by Michael McDonald

Category: Tutorials | Tags: Apache, High Availability, Load Balancing, lsyncd, Master, Nodes, Remote, rsync, Slave, SSHKeys, synchronization, Vim, Web Server

Reading Time: 8 minutes

Introduction

All online businesses need to account for growth. As a business receives more visitors to its site, the underlying infrastructure needs to scale to provide the same level of performance that the visitors are accustomed to. Horizontal scaling, the addition of more servers rather than increasing the power of the existing servers, is an easy way to build our web servers' ability to handle a more significant amount of traffic and protect us against hardware failure. Ensuring that the additional web servers have the same files and data is a potentially time-consuming and challenging task. Automating that task using free, open-source software, such as lsyncd, is a way to ensure that we have a safe, secure, and repeatable method of copying files from one server to another.

Continue reading →