Category Archives: Virtualization

In computing, virtualization refers to the act of creating a virtual version of something, including virtual computer hardware platforms, storage devices, and computer network resources.

AWS: Kubernetes – AWS Secrets Manager and Parameter Store integration
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22 July 2023

Storing access data in Kubernetes Secrets has an important drawback, because they are only available within the Kubernetes cluster itself. To make them available to external services, we can use Hashicorp Vault and integrate it with Kubernetes using solutions such as vault-k8sor use services from AWS – Secrets Manager or Parameter Store. Integrating AWS Secrets Manager and Parameter Store… Read More »

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AWS: CDK and Python – configure an IAM OIDC Provider, and install Kubernetes Controllers
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22 July 2023

So we have an AWS EKS cluster built with AWS CDK and Python – AWS: CDK and Python – building an EKS cluster, and general impressions of CDK, and we have an idea of how IRSA works – AWS: EKS, OpenID Connect, and ServiceAccounts. The next step after deploying the cluster is to configure the OIDC… Read More »

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AWS: CDK and Python – building an EKS cluster, and general impressions of CDK
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22 July 2023

So, Terraform is great, but so far in our project, we have decided to create the first AWS EKS clusters using the AWS CDK, because firstly, it is already on the project, and secondly, it is very interesting to try a new tool. Today we will see what came out of it, and how a… Read More »

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AWS: EKS, OpenID Connect, and ServiceAccounts
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8 July 2023

Currently, I’m setting up a new EKS cluster. Among other things, I’m running ExternalDNS on it, which uses a Kubernetes ServiceAccount to authenticate to AWS in order to be able to make changes to the domain zone in Route53. However, I forgot to configure the Identity Provider in AWS IAM and ExternalDNS threw an error:… Read More »

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Loki: collecting logs from CloudWatch Logs using Lambda Promtail
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20 May 2023

Collecting logs in Grafana Loki with Kubernetes is very simple – we just launch Promtail in DaemonSet, configure it to read all data from /var/logs – and that’s it (in fact, we don’t specify anything at all – everything works out of the box from the Helm chart). But what about CloudWatch Logs? On my new project,… Read More »

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Terraform: planning a new project with Dev/Prod environments
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20 May 2023

I need to plan the use of Terraform in a new project, and this includes planning the file structure for the project, how to create a backend (i.e. bootstrap) and other resources needed to get started, and think about working with multiple environments and AWS accounts. In general, this post was originally written purely about… Read More »

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AWS: CDK – an overview, and Python examples
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14 May 2023

The AWS Cloud Development Kit (AWS CDK) allows you to describe an infrastructure using the programming languages ​​TypeScript, JavaScript, Python, Java, C#, or Go. Under the hood, CDK creates a CloudFormation stack with the resources described in your code. The answer to the question “Our CDK, when is Terraform?” can be found here – 4 ultimate reasons… Read More »

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AWS: Fargate – capabilities, comparison with Lambda/EC2 and usage with AWS EKS
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7 May 2023

AWS Fargate is another serverless solution from Amazon that takes over infrastructure management, saving the user the need to spend time configuring EC2 instances, operating systems, container management systems, etc. In general, when I was getting acquainted with Fargate, I found a great video from AWS re:Invent 2022, which very well explained (and showed) the… Read More »

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Kubernetes: vertical Pods scaling with Vertical Pod Autoscaler
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1 May 2023

In addition to the Horizontal Pod Autoscaler (HPA), which creates additional pods if the existing ones start using more CPU/Memory than configured in the HPA limits, there is also the Vertical Pod Autoscaler (VPA), which works according to a different scheme: instead of horizontal scaling, i.e. increasing the number of Pods, it changes resources.requests of a Pod, which… Read More »

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Prometheus: running Pushgateway on Kubernetes with Helm and Terraform
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28 April 2023

We have a lot of AWS Lambda functions in the project, and developers want to be able to send metrics to our Prometheus to add their own alerts and graphs in Grafana. For this, the functions use the Prometheus library, which allows these metrics to be created (see Prometheus: Building a Custom Prometheus Exporter in… Read More »

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