Tech-Reader.blog

Solve: AccessDenied When Calling PutObject— Solving S3 IAM Permission Errors in AWS Problem IAM permissions can fail silently even when everything seems correctly configured. You’ve granted the right permissions to a role, confirmed the bucket exists, the service is active — yet the call fails with AccessDenied and no further explanation. These types of failures aren’t just confusing — they’re demoralizing, especially when they grind deployments to a halt or block production workloads. Clarifying the Issue Access in AWS isn’t determined by a single policy. Instead, it results from the evaluation of multiple interacting layers: the IAM policy itself, the trust relationship, any service control policies (SCPs), permission boundaries, and session policies. A denial can come from any one of these. Worse still, AWS doesn’t always indicate which policy caused the rejection. This turns simple permissions debugging into a frustrating trial-and-error exercise. You might...

Solve: AccessDeniedException or UnauthorizedOperation—Fixing IAM Errors in EC2 and Lambda Problem You launch an EC2 instance, call an AWS API from inside Lambda, or spin up automation with the CLI — and suddenly hit a wall: UnauthorizedOperation , AccessDeniedException , or a plain An error occurred (AccessDenied) . It’s unclear which policy blocked the action or even which part of the system is to blame. This lack of clarity halts builds, baffles even senior engineers, and causes support tickets to pile up. IAM debugging outside of S3 can be even more obscure because the error messages tend to be generic, and the services involved often rely on multiple assumed roles and service-linked resources. Clarifying the Issue At the heart of most EC2 and Lambda access problems is a misunderstanding of who’s performing the action, what policy applies, and how it’s being constrained. You might grant a policy to a role, but if that role is assumed ...

Solve:  ValidationException web_search Not Supported in Bedrock Claude Tool Calls Problem When developers try to invoke Claude's newer tools (like web_search_20250305 ) through Amazon Bedrock, the request fails with a ValidationException . This happens even when the JSON structure is correct and the model is compatible. Clarifying the Issue Anthropic’s Claude 3 models recently introduced new tools such as  web_search_20250305  and code_execution_20250305 . These are available via the Anthropic API, but Bedrock hasn’t yet added support for these tool types. As a result, any tool request using these identifiers is blocked before it ever reaches the Claude model. The error appears like this:  Bash ValidationException: tool type 'web_search_20250305' is not supported This is not a developer mistake—the tooling is correct. It’s simply a matter of Bedrock not allowing certain tool tags (yet). Why It Matters For many use cases—especially those involving ...

New Article on Medium:  Why AWS Still Runs on Reports We’re often told that modern cloud systems are serverless, invisible, and infinitely scalable. But here’s the quiet truth: what actually matters—the thing real humans interact with—is the output. In my newest article, I walk through why AWS is better understood not as compute-first, but as report-first. You’ll see how tools like Athena, Redshift, Lambda, and even CloudFormation all come down to what gets read, logged, and reviewed. This isn’t just about observability. It’s about clarity, continuity, and building cloud systems that speak the truth—on screen and on paper. Read the full article on Medium Need AWS Expertise? We'd love to help you with your AWS projects.  Feel free to reach out to us at  info@pacificw.com . Written by Aaron Rose, software engineer and technology writer at Tech-Reader.blog.

Insight: The Lean Power of DietPi What is DietPi, Really? DietPi is a lightweight Debian-based Linux distribution engineered for efficiency and speed, primarily on single-board computers like the Raspberry Pi. Unlike other general-purpose OSes, DietPi starts from a minimal base and allows users to build up only what they need. This is not just a slimmer Raspberry Pi OS; it's a fundamentally different approach to system design. DietPi sheds anything unnecessary—no bloated GUIs, no passive services you didn’t ask for. It gives you an extremely responsive system, whether you’re on a Pi Zero or an Odroid. With minimal RAM usage and fast boot times, it's a clear favorite among power users. Importantly, DietPi doesn't just remove things; it thoughtfully replaces core functions with optimized tools. The goal is clarity, control, and customization. The Philosophy Behind the Design The core philosophy of DietPi is one of discipline. It assumes the user wants to build something spe...

Insight: Ubuntu Core—Where Minimal Meets Mighty A Different Kind of Ubuntu When people hear "Ubuntu," they often picture a desktop environment or perhaps a server in the cloud. But tucked within the Ubuntu family is a lean, security-hardened cousin built not for workstations, but for devices. Ubuntu Core is a purpose-built OS for embedded systems—designed from the ground up to be stable, minimal, and nearly unbreakable. It's not a general-purpose operating system. You won’t be browsing Reddit on it or compiling code on a whim. Ubuntu Core is what you use when the goal is reliability over flexibility—think smart thermostats, digital signage, or industrial controllers. Systems that sit quietly, do their job, and update without needing a babysitter. The Philosophy Behind Core Ubuntu Core strips Linux down to the bones and rebuilds it with an opinionated design: every piece of software, from the kernel to userland apps, is delivered as a snap. That means everything is version...

Insight: The Great Minimal OS Showdown—DietPi vs Raspberry Pi OS Lite When you're building a headless server, IoT device, or lightweight project box, the last thing you want is bloatware eating your precious resources. Enter the world of minimal operating systems—where every megabyte matters and efficiency reigns supreme. Two contenders dominate this space: DietPi and Raspberry Pi OS Lite. Both promise lean, mean computing machines that boot straight to the command line. But scratch beneath the surface, and you'll find they take fundamentally different approaches to the "less is more" philosophy. The Minimalist's Dilemma Picture this: You've got a Raspberry Pi 3B+ sitting on your desk, destined to become a home media server. Do you go with the familiar comfort of Raspberry Pi OS Lite, or venture into DietPi's optimized territory? The choice isn't just about personal preference—it's about understanding what "minimal" means to each operatin...