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  • Advanced WordPress optimization. Part 1: main points

    In the article about «Wordpress with smart Varnish caching» I talked about the acceleration of the website using Varnish reverse proxy which generates HTML pages and returns them in the form of static. But it also happens that your website receives a high load from authorized users or there are some parts that are not acceptable to cache.

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  • Extending Ansible – modules

    Under the hood of d2c.io service we use Ansible a lot: from cloud VM creation and provisioning to Docker containers and user apps orchestration. If you missed previous articles of our “Extending Ansible” series, you should definitely read them to get initial overview of the difference between plugins and modules. The most important one is: plugins are …
  • Comparison: Docker swarm, Kubernetes, Rancher and D2C

    Since we started blogging, we’ve been compared to orchestrators more often. And if earlier there were questions about how D2C differs from Heroku, Cloud 66 and similar services, then now, apparently, we were treated as an alternative solution for orchestrating. Ok, i’ll try to fix the situation and will compare D2C with several popular solutions, …
  • Extending Ansible – plugins, part 2

    Under the hood of d2c.io service we use Ansible a lot: from cloud VM creation and provisioning to Docker containers and user apps orchestration. In the previous article we made an overview of plugin types supported by Ansible and created several own plugins: test, filter, action and callback. In this article we will dive deeper… Константин Суворов …
  • Extending Ansible – plugins, part 1

    Under the hood of d2c.io service we use Ansible a lot: from cloud VM creation and provisioning to Docker containers and user apps orchestration. Ansible is very flexible by its nature. It is written in Python and has modular design – you can easily extend functionality with custom plugins and modules. Plugins add new functions or change …
  • HAProxy load balancer. Part 2: Backend section and the algorithms

    This is the second article about HAProxy. The last one was about basic terms and layers. Here I’m going to tell you about balancing algorithms. The backend section of the configuration file is responsible for the balancing algorithm. Haproxy has 9 algorithms. Roundrobin The first in the list and the simplest algorithm is Round Robin. You …