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.

Karpenter: its monitoring, and Grafana dashboard for Kubernetes WorkerNodes
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18 February 2024

We have an AWS Elastic Kubernetes Service cluster with Karpenter which is responsible for EC2 auto-scaling, see AWS: Getting started with Karpenter for autoscaling in EKS, and its installation with Helm. In general, there are no problems with it so far, but in any case we need to monitor it. For its monitoring, Karpenter provides… Read More: Karpenter: its monitoring, and Grafana dashboard for Kubernetes WorkerNodes0 (0) »

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AWS: EKS Pod Identities – a replacement for IRSA? Simplifying IAM access management
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16 December 2023

Another very interesting new feature from the latest re:Invent is the EKS Pod Identities: a new ability to manage Pod access to AWS resources. The current state: IAM Roles for Service Accounts Before that, we used the IAM Roles for Service Accounts (IRSA) model, where in order to give a Pod access to, for example,… Read More: AWS: EKS Pod Identities – a replacement for IRSA? Simplifying… »

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AWS: CloudWatch – Multi source query: collecting metrics from an external Prometheus
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13 December 2023

Another interesting announcement from the last re:Invent is that CloudWatch has added the ability to collect metrics from external resources (see a very interesting report AWS re:Invent 2023 – Cloud operations for today, tomorrow, and beyond (COP227)). That is, we can now create graphs and/or alerts not only from the default metrics of CloudWatch itself,… Read More: AWS: CloudWatch – Multi source query: collecting metrics from an… »

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AWS: Amazon Q – an overview, features, and first impressions
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9 December 2023

We are living in very interesting times. So, let’s talk about Amazon Q, a new system from AWS that should help us, engineers and others, in our work. Amazon itself calls it an “AI-powered assistant,” but for us, as engineers, it’s just a chatbot that we can talk to get help solving some problems or… Read More: AWS: Amazon Q – an overview, features, and first impressions0… »

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AWS Elastic Kubernetes Service: RBAC Authorization via AWS IAM and RBAC Groups
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25 November 2023

We have two new projects in the Elastic Kubernetes Service (см. AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation), each project lives in its own separate Namespace. In addition, there are two users, developers, who need to be given access to these two Namespaces, but only to Pods in them and… Read More: AWS Elastic Kubernetes Service: RBAC Authorization via AWS IAM and… »

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Grafana Loki: collecting AWS LoadBalancer logs from S3 with Promtail Lambda
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25 November 2023

Currently, we are able to collect our API Gateway logs from the CloudWatch Logs to Grafana Loki, see. Loki: collecting logs from CloudWatch Logs using Lambda Promtail. But in the process of migrating to Kubernetes, we have Application Load Balancers that can only write logs to S3, and we need to learn how to collect… Read More: Grafana Loki: collecting AWS LoadBalancer logs from S3 with Promtail… »

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Kubernetes: ensuring High Availability for Pods
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25 November 2023

We have a Kubernetes cluster, where WorkerNodes are scaled by Karpenter, and Karpenter has the disruption.consolidationPolicy=WhenUnderutilized parameter for its NodePool, and this means, that Karpenter will try to “consolidate” the placement of pods on Nodes in order to maximize the use of CPU and Memory resources. In general, everything works, but this leads to the… Read More: Kubernetes: ensuring High Availability for Pods0 (0) »

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Kubernetes: Liveness and Readiness Probes – Best practices
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18 November 2023

Some useful tips on using Liveness and Readiness Probes in Kubernetes – the difference between them, and how to properly configure these checks. To put it very briefly: livenessProbe: is used by Kubernetes to know when to perform a Pod restart readinessProbe: is used by Kubernetes to know when a container is ready to receive… Read More: Kubernetes: Liveness and Readiness Probes – Best practices0 (0) »

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VictoriaMetrics: pushing metrics without Prometheus Pushgateway
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18 November 2023

In the Prometheus: running Pushgateway on Kubernetes with Helm and Terraform post I wrote about how to add Pushgateway to Prometheus, which allows using the Push model instead of Pull, that is, an Exporter can send metrics directly to the database instead of waiting for Prometheus or VMAgent to come to it. With VictoriaMetrics, it’s… Read More: VictoriaMetrics: pushing metrics without Prometheus Pushgateway0 (0) »

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Karpenter: the Beta version – an overview of changes, and upgrade from v0.30.0 to v0.32.1
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5 November 2023

So, Karpenter has made another big step towards the release, and in version 0.32 it has moved from Alpha to Beta. Let’s take a quick look at the changes – and they are quite significant – and then upgrade to EKS from Karpneter Terraform module and Karpenter Helm chart. The process of installing Karpenter was… Read More: Karpenter: the Beta version – an overview of changes, and… »

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