DevOps & SRE notes – Telegram
DevOps & SRE notes
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Helpful articles and tools for DevOps&SRE

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This article provides an in-depth examination of the design and implementation of the Vertical Pod Autoscaler (VPA) in Kubernetes Autoscaler. It discusses how VPA enhances resource utilization and cost-efficiency by dynamically updating pod resource allocations and managing evictions. The piece breaks down the architecture into its core components: Recommender, Admission Controller, and Updater, explaining their roles and processes within the VPA's operation. For a comprehensive understanding, example code snippets are included, offering insights into the practical application of these concepts.
https://greptime.com/blogs/2023-11-28-vpa-design
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The blog post details their innovative approach to constructing a customer data warehouse entirely using Postgres. It highlights how they integrated data from multiple sources into Postgres, leveraging foreign data wrappers and other extensions. This strategy not only simplified their data ecosystem but also enhanced efficiency by keeping the system within a single technology stack. The post shares insights into the challenges they faced and the open-source tools developed during the process, offering a blueprint for others looking to build a streamlined data warehouse on Postgres.
https://tembo.io/blog/tembo-data-warehouse
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The article, "The Best OS For Kubernetes," introduces Talos Linux as an optimal operating system specifically designed for Kubernetes. Highlighting the inefficiencies of traditional OS setups for Kubernetes, Anton emphasizes Talos Linux's minimalistic, secure, and immutable nature. With no shell or SSH access, Talos is managed entirely through an API, mirroring Kubernetes' operational model. The article walks through the benefits of using Talos Linux, from installation to deployment, showcasing how it simplifies Kubernetes management with features like atomic updates and configuration via YAML files.
https://mirceanton.com/posts/2023-11-28-the-best-os-for-kubernetes
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eBay introduced an accessibility linter for Marko to streamline the accessibility testing process, making it easier and more efficient for developers to create accessible code. This tool, integrated into the Marko language server, automatically identifies accessibility issues in the codebase, akin to how spellcheck operates in a word processor. By incorporating real-time feedback and suggestions for improvements, eBay aims to enhance the development workflow, ensuring their web content is accessible by default and adhering to their commitment to inclusivity.
https://innovation.ebayinc.com/tech/engineering/introducing-an-accessibility-linter-for-marko-shortening-the-accessibility-testing-pipeline/
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In the rapidly evolving landscape of cloud computing, Kubernetes has emerged as a pivotal technology for container orchestration. However, the debate between deploying Kubernetes on bare metal servers versus virtual machines (VMs) continues to gain traction. This article delves into the performance nuances of Kubernetes in both environments, providing insights into which deployment method might offer superior performance under specific circumstances. Drawing on expert opinions and performance benchmarks, we aim to shed light on this technical conundrum, guiding readers towards making informed decisions based on their unique infrastructure needs
https://thenewstack.io/does-kubernetes-really-perform-better-on-bare-metal-vs-vms/
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The article outlines 45 best practices for using Terraform effectively. It covers a range of topics from code organization, configuration flexibility, environment separation, collaboration, module versioning, to security practices. The article emphasizes the importance of maintaining code quality, security, and team collaboration to manage infrastructure efficiently. These practices are aimed at improving the scalability, security, and reliability of Terraform deployments.
https://dev.to/prakhyatkarri/terraform-45-best-practices-62l
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The article explores the evolution of tech infrastructure for startups. Beginning with a solo developer's journey from using simple, makeshift solutions to addressing the complexities of growing teams and scaling technology, the piece highlights the gradual shift towards more sophisticated, enterprise-level infrastructure. It covers initial setups with minimal funding, the transition to more structured development and deployment processes, and eventually, the establishment of specialized teams as the company matures. The narrative emphasizes that DevOps is a luxury that becomes a necessity as startups grow, suggesting a pragmatic approach to infrastructure evolution.
https://vadimkravcenko.com/shorts/infrastructure-from-zero-to-enterprise/
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In the article the team delves into the rigorous testing of their Signals tool, aimed at ensuring reliability, speed, and resilience. Through a series of "gameday" tests, they put Signals to the test under extreme conditions, demonstrating its ability to handle high request rates, maintain uptime, and quickly recover from failures. The insights gained from these tests helped them fine-tune the system for optimal performance, showcasing FireHydrant's commitment to providing a robust, mission-critical alerting and on-call management tool. This technical exploration highlights the importance of pressure testing in building resilient systems.
https://firehydrant.com/blog/improving-signals-speed-and-resilience-through-pressure-testing/
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This blogpost emphasizes the crucial role of Kubernetes (K8s) and APIs in cloud-native application development, highlighting challenges posed by the lack of native API management in K8s. It introduces the Kubernetes Gateway API as a solution, offering detailed insights into how it facilitates API management directly within K8s configurations. By leveraging this specification, developers can enhance their cloud-native applications, improving efficiency, security, and interoperability, thus streamlining the development process.
https://wso2.com/library/blogs/streamlining-cloud-native-app-development-in-kubernetes-with-prioritized-api-management/
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