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.

Helm: UPGRADE FAILED: another operation (install/upgrade/rollback) is in progress
0 (0)

24 May 2024

Sometimes, when deploying Helm charts, the error “UPGRADE FAILED: another operation (install/upgrade/rollback) is in progress” may appear: It can occur because the previous deployment failed due to errors in the chart, or the connection between the build machine and the Kubernetes cluster was lost. Check the release status with ls –all: $ helm -n dev-backend-api-ns… Read More »

Loading

AWS: VPC Flow Logs, NAT Gateways, and Kubernetes Pods – a detailed overview
0 (0)

5 May 2024

We have a relatively large spending on AWS NAT Gateway Processed Bytes, and it became interesting to know what exactly is processed through it. It would seem that everything is simple – just turn on VPC Flow Logs and see what’s what. But when it comes to AWS Elastic Kubernetes Service and NAT Gateways, things… Read More »

Loading

Kubernetes: tracing requests with AWS X-Ray, and Grafana data source
0 (0)

2 March 2024

Tracing allows you to track requests between components, that is, for example, when using AWS and Kubernetes we can trace the entire path of a request from AWS Load Balancer to Kubernetes Pod and to DynamoDB or RDS. This helps us both to track performance issues – where and which requests are taking a long… Read More »

Loading

AWS: VPC Prefix and the maximum of Pods on Kubernetes WorkerNodes
0 (0)

29 February 2024

Each WorkerNode in a Kubernetes cluster can have a limited number of Pods running, and this limit is determined by three parameters: CPU: the total number of requests.cpu cannot be more than the number of CPUs on the Node Memory: the total number of requests.memory cannot be more than the Memory on the Node IP:… Read More »

Loading

Terraform: creating a module for collecting AWS ALB logs in Grafana Loki
0 (0)

24 February 2024

An example of creating a Terraform module to automate log collection from AWS Load Balancers in Grafana Loki. See how the scheme works in the Grafana Loki: collecting AWS LoadBalancer logs from S3 with Promtail Lambda blog. In short, ALB writes logs to an S3 bucket, from where they are picked up by a Lambda… Read More »

Loading

Grafana Loki: LogQL and Recording Rules for metrics from AWS Load Balancer logs
0 (0)

24 February 2024

I didn’t plan this post at all as I thought I would do it quickly, but it didn’t work out quickly, and I need to dig a little deeper into this topic. So, what we are talking about: we have AWS Load Balancers, logs from which are collected to Grafana Loki, see. Grafana Loki: collecting… Read More »

Loading

Karpenter: its monitoring, and Grafana dashboard for Kubernetes WorkerNodes
0 (0)

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 »

Loading

AWS: EKS Pod Identities – a replacement for IRSA? Simplifying IAM access management
0 (0)

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 »

Loading

AWS: CloudWatch – Multi source query: collecting metrics from an external Prometheus
0 (0)

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 »

Loading