Category Archives: Amazon Web Services

Amazon Web Services is a subsidiary of Amazon that provides on-demand cloud computing platforms to individuals, companies and governments, on a paid subscription basis.

AWS: Monitoring AWS OpenSearch Service cluster with CloudWatch
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1 November 2025

Let’s continue our journey with AWS OpenSearch Service. What we have is a small AWS OpenSearch Service cluster with three data nodes, used as a vector store for AWS Bedrock Knowledge Bases. Previous parts: AWS: Introduction to OpenSearch Service as a vector store AWS: Creating an OpenSearch Service cluster and configuring authentication and authorization Terraform:… Read More »

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Terraform: creating an AWS OpenSearch Service cluster and users
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18 September 2025

In the first part, we covered the basics of AWS OpenSearch Service in general and the types of instances for Data Nodes – AWS: Getting Started with OpenSearch Service as a Vector Store. In the second part, we covered access, AWS: Creating an OpenSearch Service Cluster and Configuring Authentication and Authorization. Now let’s write Terraform… Read More »

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AWS: introduction to the OpenSearch Service as a vector store
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15 September 2025

We are currently using AWS OpenSearch Service as a vector store for our RAG with AWS Bedrock Knowledge Base. We will talk more about RAG and Bedrock another time, but today let’s take a look at AWS OpenSearch Service. The task is to migrate our AWS OpenSearch Service Serverless to Managed, primarily due to (surprise)… Read More »

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AWS: creating an OpenSearch Service cluster and configuring authentication and authorization
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15 September 2025

In the previous part, AWS: Getting Started with OpenSearch Service as a Vector Store, we looked at AWS OpenSearch Service in general, figured out how data is organized in it, what shards and nodes are, and what types of instances we actually need for data nodes. The next step is to create a cluster and… Read More »

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Terraform: AWS EKS Terraform module update from version 20.x to version 21.
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6 August 2025

AWS EKS Terraform module version v21.0.0 added support for the AWS Provider Version 6. Documentation – here>>>. The main changes in the AWS EKS module are the replacement of IRSA with EKS Pod Identity for the Karpenter sub-module: Native support for IAM roles for service accounts (IRSA) has been removed; EKS Pod Identity is now… Read More »

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Kubernetes: 503 errors with AWS ALB possible causes and solutions
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9 July 2025

After migration to a new EKS cluster, we started getting alerts about 503 errors sometimes. The errors were happened in three cases: sometimes without any deployment, when all Pods were Running && Ready sometimes during deployment – but only on Dev, because there is only one Pod for API and sometimes during Karpenter Consolidation. Let’s… Read More »

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Python: introduction to the Celery, and its monitoring configurations
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20 May 2025

To put it very simply, Celery is something we can use to perform tasks outside of our main service. For example, there is a Backend API that has some kind of endpoint to which mobile devices send information that the user has created a new whatever in the application. The task of the Backend is… Read More »

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Nexus: launch in Kubernetes, and PyPI caching repository configuration
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17 May 2025

In Kubernetes, we run GitHub Runner for the build and deploy of our Backend API, see GitHub Actions: Running Actions Runner Controller in Kubernetes. But over time, we noticed that there was too much traffic on the NAT Gateway – see VictoriaLogs: a Grafana dashboard for AWS VPC Flow Logs – migrating from Grafana Loki.… Read More »

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PostgreSQL: using EXPLAIN and setting up “auto_explain” in AWS RDS
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12 February 2025

I have already mentioned the EXPLAIN feature in the PostgreSQL: AWS RDS Performance and monitoring blog post, but this is such an interesting and useful thing that it’s worth talking about it separately. In addition, AWS RDS for PostgreSQL has the ability to enable Execution Plans logging with EXPLAIN, which is also useful for monitoring… Read More »

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PostgreSQL: AWS RDS Performance and monitoring
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10 February 2025

We are migrating our Backend API from DynamoDB to AWS RDS PostgreSQL, and several times RDS crashed. Actually, given that we took db.t3.small with two vCPUs and two gigabytes of memory to save money, it was quite expected, but I wondered why everything was crashing. A few days later, I started to debug the issue,… Read More »

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