DevOps&SRE Library

Opensource Platform for learning kubernetes and aws eks and preparation for for Certified Kubernetes Specialist (CKA ,CKS , CKAD) exams

I've been running a Kubernetes cluster on a mix of virtual and bare metal machines with Hetzner for about a year now, and while the setup has served me well, being a very exploratory exercise at the time it wasn't very well documented.

To rectify this, and to get a chance to play with some tools I wasn't aware of at the time, I've decided to rebuild the cluster from scratch and document the process through these posts.

Hydra: Column-oriented Postgres. Add scalable analytics to your project in minutes.

Typically, microservice-based applications distribute data widely, especially in cloud-based applications, resulting in distributed applications. This impacts the transactions within these applications. This white paper refreshes the concepts of classical and distributed transactions. Next, we explain how cloud-based applications are affected by distribution. Finally, we present compensation-based transactions as a reliable method for microservice-based application transactions, even in the cloud. 

Get sign off on the tools you need, by making a business case that resonates.

PostgreSQL (Postgres), is a powerful relational database that can store a wide range of data types and data structures. When it comes to storing graph data structures we might reach for a database marketed for that use case like Neo4J or Dgraph. Hold your horses! While Postgres is not generally thought of when working with graph data structures, it is perfectly capable to store and query graph data efficiently.

In this blog post, we’ll talk about two incident management structure models — distributed and centralized, including the pros and cons of each, and examples of what each structure looks like in our community.

When working locally with the AWS CLI or with Terraform or Terragrunt, you will require a valid AWS configuration to be authorised to communicate with AWS services.

It is recommended to leverage features such as Single Sign-On (SSO) and Role Based Access Controls (RBAC) when using your identity as the principal for interacting with AWS services.

Using SSO ensures that you are not storing a permanent access key and secret access key and that your sessions have a limited lifetime. Using permission sets (a form of RBAC) ensures that you create roles with only the minimum required permissions for relevant accounts and assume them when needed. This is one aspect of implmenting the principle of least privilege (PoLP).

In this guide it is assumed that you are making use of IAM Identity Center and that you are configured as a user. You should also have access to one or more accounts using permission sets. This guide will walk through accessing at least two accounts using the same login.

What is Terraform Drift? What problems does it cause? And how can we fix it?