In this guide, we will demonstrate how to configure a highly scalable GitLab infrastructure that manages its own costs, and automatically responds to load by increasing and decreasing available server capacity.
FreeIPA is an open-source security solution for Linux which provides account management and centralized authentication, similar to Microsoft’s Active Directory. FreeIPA is built on top of multiple open source projects including the 389…
Docker Swarm is a feature of Docker that makes it easy to run Docker hosts and containers at scale. A Docker Swarm, or Docker cluster, is made up of one or more Dockerized hosts that function as manager nodes, and any number of…
Packer, by Hashicorp, is a command-line tool for quickly creating identical machine images for multiple platforms and environments. With Packer, you use a configuration file, called a template, to create a machine image containing a preconfigured…
Redis is an open-source key-value data store, using an in-memory storage model with optional disk writes for persistence. It features transactions, a pub/sub messaging pattern, and automatic failover among other functionality. Redis has clients written in most languages with…
NATS is an open source high performance messaging system, often described as “a central nervous system for the cloud”. In this tutorial you’ll configure gnats, the official NATS server and create a basic server overload warning system that sends out emails when server load gets too high, using `gnatsd` as its message broker.
Composer is a popular dependency management tool for PHP, created to facilitate installation and updates for project dependencies. It will check which other packages a specific project depends on and install them for you, using the appropriate versions according to the project requirements.
Hadoop is a Java-based programming framework that supports the processing and storage of extremely large datasets on a cluster of inexpensive machines. It was the first major open source project in the big data playing field and is sponsored by the Apache Software Foundation. …
Puppet is a configuration management tool that helps system administrators automate the provisioning, configuration and management of a server infrastructure. In this tutorial, we will demonstrate how to install open source Puppet 4 in a master-agent setup on Ubuntu 16.04. In this setup, the Puppet master server—which runs the Puppet Server software—can be used to control al
WordPress is a CMS that can be used to set up blogs and websites quickly and easily. In this guide, we’ll set up WordPress with Caddy. Caddy is a new web server quickly gaining popularity for its wide array of unique features, like HTTP/2 support and automatic TLS encryption with Let’s Encrypt, a popular free certificate provider.
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