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Our latest publications at Flant Blog

April 23 Making the most out of Helm templates
The standard Helm library and traditional approaches to creating Helm charts are generally okay to automate non-complex tasks. But the growing complexity and number of Helm charts rapidly make the minimalistic Helm templates and controversial standard Helm library insufficient. In this article, we will show you how to make your Helm templates much more flexible […]
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April 15 How we enjoyed upgrading a bunch of Kubernetes clusters from v1.16 to v1.19
At the beginning of December 2020, we at Flant maintained about 150 clusters running Kubernetes 1.16. All these clusters have varying degrees of load. Some of them are the high-load production clusters, while others are intended for the development and testing of new features. These clusters run on top of different infrastructure solutions, starting with […]
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April 2 How to compare the performance of different HashiCorp Vault backends
Vault is an Open Source solution by HashiCorp for managing secrets. Its built-in modularity and scalability allow you both to run a small development server on your laptop and operate a fully-fledged HA-cluster intended for production environments. While preparing to use Vault, we asked ourselves two key questions: What backend (i.e., a place where secrets […]
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March 25 Introducing ovpn-admin — a web interface to manage OpenVPN users
Operating a diverse infrastructure for many customers, we realised a need for a convenient tool to manage OpenVPN certificates and users a long time ago. In a nutshell, we wanted to have a simple web interface instead of going through servers/containers and running all these CLI commands. Since the existing solutions that meet our requirements […]
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March 19 Recent troubleshooting cases from our SREs, part 3
Today, we are happy to continue our series of articles (part 1, part 2) dedicated to the challenges we face during our everyday operations. That’s our way to share our thoughts at the time and describe the actions that allowed us to overcome those obstacles successfully. Here, we will tell you the story of one […]
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March 12 Open Source solutions for chaos engineering in Kubernetes
Chaos engineering for Kubernetes gets more and more popular, and rightly so: after all, K8s was designed with the ideas of availability and resiliency in mind. Therefore these marvelous features must be tested on real-life projects occasionally. Fortunately, there are many Open Source solutions available that can help you with experimenting. Hopefully our review of […]
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February 26 Our experience with Postgres Operator for Kubernetes by Zalando
Our efforts in analyzing existing Kubernetes operators for PostgreSQL resulted in this comparison. And now we’d like to share our practical experience and fascinating lessons learned while using the solution of our choice — Postgres Operator by Zalando. Installing & getting started To deploy the operator, download the current release from GitHub and apply YAML […]
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February 18 Comparing Kubernetes operators for PostgreSQL
Our clients tend to ask us: “Can we have a cheaper alternative to Amazon RDS?”, “Wouldn’t it be awesome to have something like RDS not just in AWS…”. Well, to meet their needs and implement an RDS-like managed solution in Kubernetes, we took a look at the current state of the most popular PostgreSQL operators: […]
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