Author Archives: setevoy

AWS: Cost optimization – an overview of Bills, Cost Explorer, and the costs control
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23 June 2024

Let’s continue our series on cost optimization in AWS. Previous posts: AWS: cost optimization – purchasing RDS Reserved Instances AWS: Cost Explorer – costs checking on the CloudWatch Logs example AWS: Cost optimization – services expenses overview and traffic costs in AWS Now that we understand what we pay for in AWS, let’s see what… Read More »

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Kubernetes: monitoring Events with kubectl and Grafana Loki
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23 June 2024

In Kubernetes, in addition to metrics and logs from containers, we can get information about the operation of components using Kubernetes Events. Events usually store information about the status of Pods (creation, evict, kill, ready or not-ready status of pods), WorkerNodes (status of servers), Kubernetes Scheduler (inability to start a pod, etc.). Kubernetes Events types… Read More »

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AWS: Karpenter and SSH for Kubernetes WorkerNodes
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23 June 2024

We have an AWS EKS cluster with WorkerNodes/EC2 created with Karpenter. The process of creating the infrastructure, cluster, and launching Karpenter is described in previous posts: Terraform: Building EKS, part 1 – VPC, Subnets and Endpoints Terraform: Building EKS, part 2 – an EKS cluster, WorkerNodes, and IAM Terraform: Building EKS, part 3 – Karpenter… Read More »

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Pritunl: launching a VPN in AWS on EC2 with Terraform
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23 June 2024

I’ve already written a little about Pritunl before – Pritunl: Running a VPN in Kubernetes. Let’s return to this topic again, but this time on EC2 in AWS, without Kubernetes. So, what we need to do is to run some kind of VPN service for the project to have access to Kubernetes APIs/Kubernetes WorkerNodes/AWS RDS/etc… Read More »

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Dependabot: GitHub, and Terraform versions management
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30 May 2024

Over time, as the project grows, sooner or later the question of upgrading versions of packages, modules, and charts will arise. You can do it manually, of course, but only up to a certain point, because eventually you simply won’t be able to physically monitor and update everything. There are many solutions for automating such… Read More »

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

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AWS: VPC Flow Logs, NAT Gateways, and Kubernetes Pods – a detailed overview
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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 »

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GitHub Actions: working with Reusable Workflows
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23 March 2024

In the post GitHub Actions: Deploying Dev/Prod Environments with Terraform I’ve already touched on the topic of GitHub Actions Reusable Workflows and Composite Actions a bit, so it’s time to learn more about it. What needs to be done: currently in my project, we write Workflow files in each repository separately. However, since all processes… Read More »

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