How To Create a High Availability HAProxy Setup with Corosync, Pacemaker, and Reserved IPs on Ubuntu 14.04

December 5, 2020
Linux
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This tutorial will show you how to create a High Availability HAProxy load balancer setup on the cloud provider, with the support of a Floating IP and the Corosync/Pacemaker cluster stack. The HAProxy load balancers will each be configured to split traffic between two backend application servers. If the primary load balancer goes down, the Floating IP will be moved to the secondary load balancer automatically, allowing service to resume.

How To Set Up Physical Streaming Replication with PostgreSQL 12 on Ubuntu 20.04

December 3, 2020
Linux
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Streaming replication is a popular method you can use to horizontally scale your relational databases. In this tutorial, you will set up physical streaming replication with PostgreSQL 12 on Ubuntu 20.04 using two separate machines running two separate PostgreSQL 12 clusters. One machine will be the primary and the other, the replica.

Создание резервного пула хранения данных с помощью GlusterFS в Ubuntu 20.04

November 27, 2020
Linux
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Предыдущая версия данного обучающего руководства была написана Джастином Эллингвудом. При хранении любых важных данных очень рискованно иметь единую точку отказа. Хотя многие базы данных и другие программы позволяют…

How To Manage Jenkins with Rancher on Ubuntu 14.04

November 16, 2020
Docker
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In this article we will construct a distributed build system using Docker to create and run our Jenkins images, as well as Rancher to orchestrate our Docker cluster. By the end of this tutorial, you should be able to easily set up a Dockerized Jenkins deployment with an arbitrary number of slaves.

Understanding Database Sharding

November 10, 2020
Tutorials
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Sharded databases have been receiving lots of attention in recent years, but many don’t have a clear understanding of what they are or the scenarios in which it might make sense to shard a database. This conceptual article goes over what sharding is, some of its main benefits and drawbacks, and also a few common sharding methods.

How To Automate the Scaling of Your Web Application on the cloud provider Ubuntu 16.04 Droplets

October 25, 2020
Linux
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In this tutorial, we will demonstrate how to use cloud provider API to horizontally scale your server setup. To do this, we will use **DOProxy**, a relatively simple Ruby script that, once configured, provides a command line interface to scale your HTTP application server tier up or down.

How To Create a Sharded RethinkDB Cluster on Ubuntu 14.04

October 10, 2020
Linux
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Learn how to create a sharded RethinkDB cluster for improved database performance across multiple machines.

How To Centralize Logs with Rsyslog, Logstash, and Elasticsearch on Ubuntu 14.04

September 20, 2020
Linux
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Rsyslog, Elasticsearch, and Logstash provide the tools to transmit, transform, and store your log data. In this tutorial, you will learn how to create a centralized rsyslog server to store log files from multiple systems and then use Logstash to send them to an Elasticsearch server. From there, you can decide how best to analyze the data.