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Author - Saša Teković

Puppet acceptance testing

Puppet acceptance testing – intro

Hi there. In this post, we’ll cover the introduction to Puppet acceptance testing. If you are new to Puppet, we recommend that you check out Easy Puppet module development with PDK. And if you are curious about testing Puppet modules, the Puppet unit testing for beginners post is a good...

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Puppet module

How bad can a greedy regex really get?

Recently, a client approached us with a curious Puppet Server problem that manifested in excessive CPU usage on the Puppet Server. One of the surprising things was that the issue appeared out of the blue, and was causing timeouts during Puppet runs on 650 nodes. None of the recent changes...

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Puppet – nearly a decade long friendship

Puppet – nearly a decade long friendship

Puppet is an open-core configuration management tool that significantly simplifies infrastructure management, especially when sysadmins have to deal with a large number of servers. Essentially, with its declarative language, Puppet allows sysadmins to describe the desired system state in high-level terms - e.g. users, installed packages, enabled services, configuration files, etc. Puppet...

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Swiss army knife

HAProxy – sysadmin’s swiss army knife

HAProxy is a free, open-source, high-performance TCP/HTTP load balancer. HAProxy has been around since 2001, it's written in C programming language, and it uses an insignificant amount of memory and CPU resources, even with very advanced manipulations on HTTP traffic. It's also very secure, having only fifteen security issues during the...

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monitoring PHP

Monitoring PHP applications

When considering PHP applications monitoring, it’s essential to monitor not only the application itself but the services on which the application depends, as well as the infrastructure hosting the application. Detecting performance bottlenecks and debugging problems can otherwise be very tricky, and unexpected downtime may occur. Infrastructure monitoring Our advanced monitoring system...

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Preventing server downtime

Preventing server downtime

Downtime is used to refer to periods when a system is unavailable and fails to provide or perform its primary function. As discussed in our previous blog article, server downtime is not only bad for productivity, but it also causes many other related issues, such as downgraded brand image, financial...

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