Dev Documents Kubernetes Hard Way Step 8: Controllers, API Server, and a Port Conflict

·7 views

A developer building a Kubernetes homelab using the 'Kubernetes the Hard Way' guide has completed Step 8, which involves bootstrapping the Kubernetes control plane components. The step required installing and configuring the API Server, Scheduler, and Controller Manager as Linux services on the controller node. While setting up the API Server, the developer hit a failure caused by port 6443 already being in use. Investigation revealed that a forgotten k3s installation from months earlier was occupying the port. Stopping and disabling the leftover k3s service resolved the conflict and allowed the setup to proceed.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Redux Explained: Core Concepts, Architecture, and Real-World Patterns

Redux is a predictable state management library designed to address common frontend challenges such as prop drilling, scattered business logic, and inconsistent application state. It works by centralizing application state in a single store, ensuring components cannot directly modify state but must instead dispatch actions. Reducers then calculate the next state based on the previous state and the dispatched action, following the formula: Previous State + Action = Next State. Modern Redux development is recommended through Redux Toolkit, which simplifies store configuration and reduces boilerplate code. The library is widely used with frameworks like React and Angular to manage complex asynchronous operations and maintain a structured, debuggable data flow.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Open Source Platform Aims to Make Brazilian Public Spending Data Accessible

A developer has launched the Observatório de Gastos Públicos, an open source project designed to make Brazilian public expenditure data easier to access and understand. The platform is already integrated with data from several municipalities, with plans to expand coverage to as many cities as possible. Built with frontend assistance from Claude Code, the project aims to add features such as historical price comparisons, inflation tracking, public debt monitoring, and government salary lookups. Visualizations and simple indicators are planned to help ordinary citizens follow where public money goes. The developer is actively welcoming contributors across code, data, UX/UI, and architecture to help grow the project.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Flask Nova 0.2.x adds async tasks, Pydantic validation, and OpenAPI 3.0 support

Flask Nova 0.2.x is a new release of the Flask extension designed to simplify building enterprise-grade APIs by filling gaps in the standard framework. The update introduces two async task offloaders, to_thread() for blocking I/O and to_process() for CPU-bound work, enabling asynchronous execution within Flask routes. Pydantic Field definitions can now be applied directly to path and query parameters, allowing developers to enforce constraints such as value ranges, string lengths, and regex patterns. OpenAPI 3.0 support has been enhanced with automatic Blueprint tag grouping, additional route decorator metadata options, and explicit multi-file upload handling. The release also improves observability through RFC 7807 problem details, ANSI-colored JSON logging, and automatic trace ID injection into HTTP exception responses.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Apache Iceberg, Polaris, and Parquet Face Release Hurdles Over License Gaps

During the week of September 15–23, 2026, Apache Data Lakehouse projects including Iceberg, Polaris, and Parquet encountered repeated release setbacks due to missing or incorrect license file entries. Iceberg 1.12.0 advanced to a second release candidate after reviewers discovered bundled web assets lacking proper license notices, while Polaris 1.8.0 failed two separate votes over a NOTICE gap and an incorrect file header. Beyond release logistics, significant design work progressed across projects, including Parquet's Modular Footer proposal, Iceberg's materialized view spec, and DataFusion taking ownership of the Iceberg Rust integration. A common theme emerged across all three projects: how servers and readers should behave when they cannot fulfill a client request, with every project converging on explicit failure and documented behavior as the answer. Community verification of Iceberg 1.12.0 RC0 was notably thorough, with multiple contributors confirming test results and tarball integrity before the license issues ultimately required a new candidate.

0 comments Read more at DEV Community