Archive - RTFM! DevOps[at]UA

Terraform: using import, and some hidden pitfalls

Introduction to Terraform import using AWS IAM User as an example, importing into a module, and some non-obvious aspects of working with imports

Jun 15 •

Arseniy Zinchenko

Terraform: data types, loops, indexes, and the “resource must be replaced” issue

An example of how Not To do, or how indexes in for_each break logic and lead to resource recreation with Terraform

Jun 4 •

Arseniy Zinchenko

May 2025

AI: Introduction to Ollama for local LLM launch

Introduction to Ollama, launching local models, creating own model from Modelfile, and connecting Roo Code to the local LLM

May 31 •

Arseniy Zinchenko

Python: introduction to the Celery, and its monitoring configurations

The Python Celery overview, its use to create and process background tasks, and discover options to monitor it

May 29 •

Arseniy Zinchenko

AI: writing an MCP server for VictoriaLogs

Continuing an introduction to the Model Context Protocol: writing a simple MCP server in Python to work with VictoriaLogs

May 28 •

Arseniy Zinchenko

AI: What is the MCP?

Exploring the Model Context Protocol: its components and architecture, writing our own simple MCP server, and connecting it to an IDE.

May 23 •

Arseniy Zinchenko

Python: introduction to @decorators using FastAPI as an example

What are decorators in Python, and how does the @app.get() work in the FastAPI?

May 22 •

Arseniy Zinchenko

Nexus: Configuring Docker proxy repository, and ContainerD in Kubernetes

Running Sonatype Nexus, setting up a Docker proxy repository, and configuring ContainerD registry mirrors in Kubernetes with Karpenter

May 17 •

Arseniy Zinchenko

Nexus: launch in Kubernetes, and PyPI caching repository configuration

Launch Sonatype Nexus in Kubernetes to cache PyPI packages and save AWS NAT Gateway traffic

May 17 •

Arseniy Zinchenko

February 2025

PostgreSQL: using EXPLAIN and setting up “auto_explain” in AWS RDS

Understanding the EXPLAIN and memory in PostgreSQL, and setting up EXPLAIN logging in AWS RDS

Feb 12 •

Arseniy Zinchenko

PostgreSQL: AWS RDS Performance and monitoring

An in-depth look at the PostgreSQL in AWS RDS: performance issues, monitoring, memory and Swap, disk and processes.

Feb 10 •

Arseniy Zinchenko

January 2025

VictoriaLogs: creating Recording Rules with VMAlert

An example of creating VictoriaMetrics Recording Rules for VMAlert from logs in VictoriaLogs, running in Kubernetes

Jan 11 •

Arseniy Zinchenko

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