Author Archives: setevoy

Dependabot: GitHub, and Terraform versions management

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… Read More »

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

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 »

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

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 »

GitHub Actions: working with Reusable Workflows

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 »

Arch Linux: fixing the “yay: error while loading shared libraries: libalpm.so.13” error

17 March 2024
 

 After the latest Arch Linux upgrade, Yay reported the following error: yay: error while loading shared libraries: libalpm.so.13: cannot open shared object file: No such file or directory First, let’s check if we have the libalpm library file, and which version: $ sudo find / -type f -name “*.so*” | grep libalpm /usr/lib/libalpm.so.14.0.0 So, we… Read More »

GitHub Actions: Terraform deployments with a review of planned changes

7 March 2024
 

  In the GitHub Actions: deploying Dev/Prod environments with Terraform blog I’ve already described how we can implement CI/CD for Terraform with GitHub Actions, but there is one significant drawback to that solution: there is no way to review changes before applying them with terraform apply. GitHub Actions has the ability to use Reviewing deployments… Read More »

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

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 »

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

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 »

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

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 »