Error in terraform: failed running terraform init
Publication
October 21, 2024
If you’ve ever worked with large GitHub repositories and used Terraform, you might have encountered a frustrating performance issue during the initialization phase (terraform init). GitHub download speeds can sometimes be surprisingly slow, which can lead to failures in infrastructure automation processes. In my case, I ran into the following error multiple times:
Operation failed: failed running terraform init (exit -1)
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Tags: Cloud, DevOps, IT Operations
How to Detach an EC2 Instance from Auto Scaling in AWS
Publication
October 21, 2024
Using Auto Scaling in AWS cloud is a great way to automatically scale EC2 instances based on demand. However, there may be situations where you need to detach an EC2 instance from an Auto Scaling group—perhaps to manage it manually or run tests. In this article, I’ll walk you through the process of detaching an EC2 instance step by step.
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Tags: Cloud, DevOps, IT Operations
How to Become a DevOps Engineer – A Roadmap for Beginners
Publication
October 21, 2024
Recently, I received a message from someone asking how to start their journey into DevOps. Since this question comes up frequently, I decided to write this post to help a broader audience who may be facing the same challenge. If you’re wondering where to start, what technologies to learn, and how to invest your time, this roadmap might be valuable to you.
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Tags: Cloud, DevOps, IT Operations
Managing Resource Creation in Terraform: count and for_each
Publication
October 14, 2024
When working with Terraform, you often need to create resources based on certain conditions—sometimes one, sometimes multiple, and occasionally none. Terraform offers two useful functions, count and for_each, to control how many resources are created. These can be used in different ways depending on what you want to achieve.
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Tags: Cloud, DevOps, IT Operations
Amazon Rekognition – Detecting Objects and Faces with AWS Lambda
Publication
October 07, 2024
Amazon Rekognition is a powerful tool available within the AWS cloud, designed for analyzing images and videos. With this service, you can detect objects, faces, emotions, and much more, offering tremendous potential for automating and understanding visual data. In this article, I’ll introduce the basics of Amazon Rekognition and show how you can use it in combination with AWS Lambda to create automated workflows for image analysis. In this article, I’ll also include a link to my video, where I demonstrate real-world examples of these functions in action.
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Tags: Cloud, DevOps, IT Operations
AWS Community Day Poland 2024
Publication
April 15, 2024
On April 11, 2024, one of the most anticipated conferences in the world of cloud technologies took place in Poland – AWS Community Day 2024. This year’s event attracted not only experienced AWS specialists, but also those who are just starting their adventure with the cloud. The conference not only offered the latest insights into AWS development, but also served as an excellent platform for exchanging experiences, networking with like-minded individuals, and drawing inspiration from a wide array of lecture topics, spanning from fundamental to advanced issues.
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Tags: Cloud, DevOps, IT Operations
Combining alarms in the AWS cloud – Composite Alarm
Publication
April 07, 2024
In this article you will find a lot of information about alarms, notifications and similar things in the AWS cloud. You probably know that the CloudWatch service, which is an integral part of AWS, allows you to collect and monitor metrics and logs from various services and resources in the AWS cloud.
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Tags: Cloud, DevOps, IT Operations
Cross-Region Transit Gateway Peering in AWS
Publication
January 29, 2024
Cross-Region Transit Gateway Peering in AWS
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Tags: Cloud, DevOps, IT Operations
AWS Community Builders 2024 - conclusions after 2 years
Publication
January 19, 2024
AWS Community Builders 2024 - conclusions after 2 years
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Tags: Careers, Cloud, DevOps
VPC peering connection 2024
Publication
January 15, 2024
Short blogpost about VPC peering connection in AWS cloud
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Tags: Cloud, DevOps
Cold Start Challenge in AWS Lambda Functions
Publication
December 27, 2023
Short article about Cold Start Challenge in AWS Lambda Functions
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Tags: Cloud, DevOps, IT Operations
Navigating Overlapping IP Addresses? Several solutions in the AWS cloud!
Publication
August 15, 2023
As businesses expand and evolve, the need often arises to merge multiple networks into a unified and efficient infrastructure. Within the cloud environment, this process can present a unique challenge when the networks being merged have overlapping IP addresses.
In the article you will find several solutions to untangle the web!
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Tags: Cloud, DevOps, IT Strategy
Start working in IT – tips from a technical recruiter
Publication
August 06, 2023
Working in the information technology (IT) industry can be a fascinating and rewarding career choice. Sometimes I’m asked to do a technical interview and I thought I could basically write some advice for people who would like to start working in IT. So I did, I wrote a social media post that got a lot of attention. This article was created as an extension of a social media post. To get a broader perspective, I decided to talk to some colleagues who also do technical interviews..
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Tags: Careers, Coaching, DevOps
How to read and write a file on S3 using lambda function and boto3
Publication
August 04, 2023
In this article you will learn how to save files to S3 and read them using the lambda function and boto3 in the AWS cloud. You’ll also find information about what permissions I’ve given the lambda function to do these things and nothing else. It is good practice to always grant only minimal permissions. It is not worth doing solutions based on admin roles. You should adjust permissions for each function and project individually.
In the corporate world, it is a valued skill that increases security and builds the trust of superiors, because they do not have to correct the code after you, and the entire project does not stretch over time.
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Tags: Cloud, DevOps, IT Operations
Increase Productivity: The Potential Of Networking Tools In The AWS Cloud
Publication
July 19, 2023
AWS offers many networking tools to facilitate your daily work in the cloud. If you want to increase your productivity and improve your work in the AWS cloud, check out this article. Below you will find 2 examples of tools related to network and infrastructure.
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Tags: Cloud, DevOps, IT Operations
Start in IT, learn programming and use Docker
Publication
April 03, 2023
This article is just part of a podcast talking about what docker can be useful for when you’re learning programming. In the podcast, we talked about how you can get started with containers and gave plenty of advice, warned about common mistakes and told you when it’s better not to use containers.
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Tags: Cloud, DevOps, IT Operations
How to clean S3 automatically – Lambda + CloudWatch Events
Publication
August 15, 2022
I had a problem a long time ago, when I gave people access to S3, they treated it like garbage can. Bucket was supposed to be for development purposes only, testing to see if features worked well etc. It’s just that people were testing different things and forgetting to delete files.
I decided to do something about it once and for all. These are buckets for testing and such are to be left empty with no sensitive data, and preferably no data at all
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Tags: Cloud, DevOps, IT Operations
Microsoft Azure exam at home
Publication
May 18, 2020
I wanted to pass a Microsoft exam, but not specifically go to an exam center, so I took the option to take the exam online.
I will present below what it looked like. Maybe it will be useful to someone and will also decide to pass some Microsoft exam online.
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Tags: Careers, Cloud, DevOps
Bjorn - Network Viking - Cybersecurity Tool on Raspberry | Building & Troubleshooting
Publication
February 10, 2025
In this video, I take a Raspberry Pi Zero 2 W and transform it into a powerful cybersecurity tool: Bjorn. Designed for network analysis and offensive security, Bjorn is a compact yet feature-rich solution for anyone interested in IT security. Equipped with an ePaper display featuring a small Viking, it’s like a tamagotchi for cybersecurity enthusiasts!
What is Bjorn?
Bjorn is an advanced network scanning and security tool built specifically for the Raspberry Pi. It allows you to:
️ Discover devices on a network
️ Identify open ports and exposed services
️ Perform brute force attacks and extract files
️ Zombify hosts for advanced network analysis
️ Run custom attack scripts – the possibilities are huge!
What’s in this video?
I’ll guide you through every step of the process:
️ Building the hardware – Assembling the Raspberry Pi, soldering (or not), and preparing the ePaper display
️ Installing the software – Setting up Raspberry Pi OS, installing Bjorn, and troubleshooting common errors
️ Configuring the display – Fixing issues with ePaper screens and getting it to work flawlessly
️ Testing & usage – Demonstrating how Bjorn scans networks, identifies vulnerabilities, and executes security tasks
️ Connecting via WiFi & USB – How to access Bjorn remotely and control it with ease
️ Important Notice: This tool should only be used on your own network or one where you have explicit permission from the owner. Unauthorized use of such devices is strictly prohibited!
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Tags: Cloud, Cybersecurity, DevOps
Tiny Home AI server with 1GB RAM on Raspberry PI 3 | ollama
Publication
January 13, 2025
Can you run an AI server on a Raspberry Pi 3 with just 1GB of RAM? Yes, you can! In this video, I’ll show you how to turn a Raspberry Pi into a functional AI server, install models like Llama, and compare their performance on this tiny device.
What you'll learn:
How to install an operating system on a Raspberry Pi
Setting up an AI environment and installing AI models
Running and testing different AI models on low-power hardware
Performance comparison: What actually works on a Raspberry Pi?
Whether you’re a beginner or a tech enthusiast, this guide will walk you through the entire process step by step!
TIMESTAMPS
---------------------------------------------------
00:00 Intro – AI on Raspberry Pi?
01:02 Installing the OS on SD Card
03:05 Setting Up the AI Environment
04:08 Testing 1 AI Model on Raspberry Pi - qwen2.5
06:55 Testing 2 AI Model on Raspberry Pi - tinyllama
08:05 Testing 3 AI Model on Raspberry Pi - smollm2
10:15 Testing AI Model on old Laptop with 16GB RAM - smollm2
10:44 Comparing AI Model Performance
You can find more tips on my YouTube channel and on my blog https://lepczynski.it/en.
Don't miss the next video:
SUBSCRIBE: / @wojciechlepczynski
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Tags: AI, Cloud, DevOps
Free Generating Images at Home | Step-by-Step Tutorial with Local AI and Stable Diffusion
Publication
November 25, 2024
In this video, I’ll guide you through installing and setting up Stable Diffusion on your home AI server. You’ll learn how to generate images locally without relying on cloud services.
What you’ll learn:
Installing Stable Diffusion
Setting up AUTOMATIC1111 Web UI
Expanding a home AI server to include image generation
Check out my previous video on creating a home AI server with Ollama and OpenWebUI: • Free local AI Server at Home: Step-by...
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Tags: AI, Cloud, DevOps
Free local AI Server at Home: Step-by-Step Guide
Publication
November 18, 2024
Discover how to set up your own private AI server at home in just a few simple steps—no advanced technical knowledge required! In this video, I’ll guide you through creating a secure, local AI server on your laptop using Ollama. Whether you’re using Windows, Linux, or macOS, I’ll show you how easy it is to get started. ️
You'll learn how to:
Install Ollama and add AI models like Llama 3.2
Enhance functionality with Docker and OpenWebUI for a graphical interface
Use your AI server to summarize text, optimize code, translate languages, and more
This tutorial is beginner-friendly, but powerful enough for advanced users. You’ll even see how your server can analyze images or simulate dice rolls with Python code.
Don’t wait—watch now and create your AI server at home!
You can find more tips on my YouTube channel and on my blog https://lepczynski.it/en.
️ If you’re interested in this topic, I recommend watching my follow-up video on generating images with Stable Diffusion. It enhances the AI server we created in this tutorial, but can also be used independently if you're mainly interested in generating images️ • Free Generating Images at Home | Step...
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Tags: AI, Cloud, DevOps
AWS Automation - Troubleshoot SSH | EC2 2024
Publication
July 15, 2024
The AWSSupport-TroubleshootSSH automation document installs the Amazon Elastic Compute Cloud (EC2) Rescue for Linux (ec2rl) tool, and then uses the openssh module to check or attempt to fix common issues that prevent a remote connection to the Linux machine via Secure Shell (SSH). Optionally, changes can be applied offline by stopping and starting the instance, if the user explicitly allows for offline remediation using the AllowOffline input parameter. By default, the document operates in read-only mode.
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Tags: Cloud, DevOps, IT Operations
10 GitHub repo that every developer should know | 2024
Publication
May 06, 2024
10 GitHub repos worth knowing. If you like learning and want to increase your value on the labor market, see what I have prepared for you. You can find a lot of free, organized and valuable knowledge there. Maps that will show you the way to become a Developer, DevOps, Architect, someone who earns a lot of money. The books are available in various languages. Games that help you learn by playing. Free courses and certificates that will help develop your career.
Do you know any other GitHub repositories worth visiting? Help others, share your knowledge and leave a comment.
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Tags: Cloud, DevOps, IT Operations
VPC Flow Logs - Step-by-Step AWS Tutorial 2024
Publication
April 22, 2024
Hi there! I wanted to share some valuable insights with you about AWS Flow Logs, which can be an invaluable tool in working with AWS cloud.
VPC Flow Logs - a powerful tool for understanding and monitoring the traffic in your AWS Virtual Private Cloud.
Flow logs help you do things like:
Figuring out if your security rules are too strict
Keeping an eye on the traffic reaching your instance
Knowing which way the traffic is going to and from the network interfaces.
You can create a flow log only for specific network interface, for a subnet, or for a entire VPC. If you create a flow log for a subnet or VPC, each network interface in that subnet or VPC is monitored.
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Tags: Cloud, DevOps, IT Operations
AWS Composite Alarm | CloudWatch 2024
Publication
March 25, 2024
Composite Alarm in AWS Cloud!
In today's world, monitoring and managing resources in the cloud are crucial elements for maintaining the stability and performance of applications.
AWS CloudWatch alarms allow us to react immediately to abnormalities or anomalies in our resources.
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Tags: Cloud, DevOps, IT Operations
NACL and Security Group in AWS | Demo Tutorial 2024 SG & Network Access Control List
Publication
February 26, 2024
Exploring Cloud Network Security: A Comparative Analysis of Security Groups and Network Access Control Lists (NACLs)
In this informative video, I take you through the essential aspects of network security in cloud computing, focusing on Security Groups (SG) and Network Access Control Lists (NACLs).
With cloud security being of paramount importance, I elucidate scenarios where employing both becomes imperative for robust network protection.
The demonstration segment showcases step-by-step procedures for creating Security Groups and NACLs. Through dynamic rule adjustments, you will witness firsthand how network traffic can be effectively managed and potentially blocked, highlighting the significance of these security measures in safeguarding cloud infrastructure.
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Tags: Cloud, DevOps, IT Operations
EC2 cross-region Transit Gateway peering connection 2024 | Hands-On - AWS tutorial
Publication
January 29, 2024
EC2 crossAWS Transit Gateway & VPC peering connection 2024. In this video you will find a practical tutorial with examples. Hands-On Tutorials for Amazon Web Services (AWS).
This is the second part where you will delve deeper into the peering connection between two Transit Gateways. You will discover its purpose and functionality. Through this tutorial, you'll gain the skills to establish a connection from an EC2 instance in the first region to another EC2 instance in the second region using a peering connection between two Transit Gateways.
This video marks the conclusion of the two-part series.
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Tags: Cloud, DevOps, IT Operations
AWS VPC peering connection 2024 | Hands-On - Practical tutorial with examples
Publication
January 15, 2024
AWS VPC peering connection 2024 | Hands-On - Practical tutorial with examples
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Tags: Cloud, DevOps, IT Operations
Lambda cold start - warming up
Publication
December 26, 2023
How can you automatically warm up the environment for Lambda functions?
Today's video tutorial will be about warming up the lambda function and cold starts.
I show you how AWS Lambda function work under the hood.
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Tags: Cloud, DevOps, IT Operations
Start / Stop ec2 machines with special TAG in all regions
Publication
October 11, 2023
In this video I show you how you can Start or Stop ec2 machines with special TAG in all regions using Lambda function and CloudWatch event. You can add specific TAG and only ec2s containing this TAG will be stopped.
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Tags: Cloud, DevOps, IT Operations
How to pass variable from CloudWatch event to AWS Lambda function | Tutorial with demo 2023
Publication
September 19, 2023
In this video tutorial I just use Lambda function with Python 3.11, simple IAM AWS LAMBDA BASIC Execute role and CloudWatch event. Using CloudWatch event you can pass variable to Lambda function witch different value and run different code.
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Tags: Cloud, DevOps, IT Operations
6 tips from DevOps Technical Recruiter | Job Interview 2023
Publication
July 26, 2023
Today I want to share some valuable interview tips for a DevOps position.
As a Technical Recruiter, I've seen many candidates go through the process, and I'm here to help you stand out from the crowd.
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Tags: Careers, Cloud, DevOps
Overlapping network addresses - How to deal with it in AWS using private NAT gateway | tutorial 2023
Publication
July 17, 2023
- Did you know that with a private NAT gateway you can hide your entire network?
- Did you know that if you have 2 networks with the same IP range, the resources contained in them can still connect to each other?
Yes it is possible, in the video I have prepared I talk about the whole process and I also recorded a whole tutorial showing step by step what to do to achieve it.
The video is from July 2023 so it's fresh and current.
A NAT gateway is a Network Address Translation (NAT) service. You can use a NAT gateway so that instances in a private subnet can connect to services outside your VPC but external services cannot initiate a connection with those instances.
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Tags: Cloud, DevOps, IT Operations
Cross account IAM - How to use IAM role from another AWS account | demo tutorial 2023
Publication
May 16, 2023
Cross account IAM. How to use IAM role from another AWS account.
IAM roles are a powerful tool for managing access to AWS resources,
but they can be tricky to set up and use. Today I will show you how lambda function can use a role from another AWS account.
In one AWS account, you can create a lambda function and assign a role as usual. However, you can create a new IAM role in a completely different AWS account and let the lambda function use it. You can control another AWS account using the Lambda function.
In the video I will use python 3.10 and boto3.
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Tags: Cloud, DevOps
How to read write files on s3 using lambda function - python & boto3 | AWS 2023
Publication
May 04, 2023
Today I want show you how you can save file from lambda on S3.
And how to read this file from s3 using lambda function with python and boto3.
I crate simple 2 lists in python and write this lists on s3
after this I read all files from s3 and create one big list.
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Tags: Cloud, DevOps
7 ways to delete objects from AWS S3 | How and when to use them | Tutorial 2023
Publication
February 20, 2023
7 ways to delete objects from AWS S3 | How and when to use them | Tutorial 2023
Do you know 7 ways to delete data from S3?
In my video tutorial I'll start with the basics and move on to the more difficult ones such as deletion via lifecyclerules, lambda function or API.
Of course, this is a tutorial so you will see all the methods how they work in practice, not just in theory.
You will be able to successfully try them yourself on your AWS account.
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Tags: Cloud, DevOps, IT Operations
How to create an alarm based on metrics? | AWS EC2 | CloudWatch 2023
Publication
January 17, 2023
How to set disk space usage notifications in AWS EC2
In this video you will learn how in the AWS cloud you can set notifications when disk usage exceeds a certain level.
How to configure Cloud Watch agent to send metrics about disk space usage.
In CloudWatch, you can set notifications for many parameters and keep everything under control.
It's a good idea to use several levels of notifications.
For example, when the disk space usage exceeds 80%, the entire team can be notified, and when the disk usage exceeds 90%, the entire team and the manager can be notified.
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Tags: Cloud, DevOps, IT Operations
API Gateway & Lambda - how to use API_KEY | security
Publication
December 20, 2022
In this video you will learn how to connect lambda functions to the API Gateway and how easily you can add security to the API Gateway.
I will add the API KEY.
I will show you 2 ways to create an ApiGateway.
First, a longer and a bit more difficult way
and then a simple and fast one.
Securing Your API with API Keys:
API keys are an important part of securing your API. By requiring clients to provide a valid API key, you can ensure that only authorized users are able to access your API. You can also revoke API keys if they are compromised or no longer needed.
In addition to API keys, API Gateway provides other security features like SSL/TLS encryption, AWS Identity and Access Management (IAM) integration, and OAuth2.0 support. By using these features in conjunction with API keys, you can create a highly secure and scalable API infrastructur
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Tags: Cloud, DevOps, IT Operations
Log in to multiple AWS accounts in one browser
Publication
November 08, 2022
How to be logged in to multiple AWS/Azure #accounts at the same time in the same browser without using incognito mode?
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Tags: Cloud, DevOps, IT Operations
AWS Lambda Function & S3 trigger | tutorial - How to copy files from one bucket to another
Publication
September 14, 2022
How the #lambda function can automatically transfer files from one S3 bucket to another S3 bucket. The source file will be automatically deleted when the copy is finished. The function will work automatically. When someone adds a file to a special folder in bucket_1, it will be automatically moved to another folder in bucket_2 and removed from the first one.
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Tags: Cloud, DevOps, IT Operations
