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<div style="display: none; max-height: 0px; overflow: hidden;">Apache Spark 4.1 introduces Spark Declarative Pipelines (SDP) for declarative data engineering and enables Real-Time Mode in Structured Streaming </div>
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<h1><strong>TLDR DevOps <span id="date">2026-01-09</span></strong></h1>
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<strong>What happens when a 300-year-old bank goes all-in on feature flags? (Sponsor)</strong>
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Lloyds Banking Group has been around since 1765. Now they're running one of the most ambitious digital transformations in UK banking — with feature flags at the center of it.<p></p><p><a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.getunleash.io%2Flloyds-jan-2026-webinar%23Register%3Futm_source=newsletter%26utm_medium=referral%26utm_campaign=tldr/3/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/tkRcBDhNeuFnXyhv6IRDzxgGuTw0ubtDLzAW8V672Rg=439" rel="noopener noreferrer nofollow" target="_blank"><span>In this live webinar</span></a>, Daniel Woollery (Head of Digital Services, Lloyds) shares how the bank scaled <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.getunleash.io%2Flloyds-jan-2026-webinar%23Register%3Futm_source=newsletter%26utm_medium=referral%26utm_campaign=tldr/4/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/CeZ15Rug74xJJ9TspnxcFGHCEwjmqL68KgmTzRQCs4k=439" rel="noopener noreferrer nofollow" target="_blank"><span>FeatureOps</span></a> from scattered team experiments to an enterprise-wide platform. </p>
<p>📋 On the agenda: migrating hundreds of flags off legacy systems, building governance that <em>accelerates</em> delivery, and rolling out GenAI with feature-level risk controls.</p>
<p>🕰️ Webinar starts January 19 @ 10AM ET. <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.getunleash.io%2Flloyds-jan-2026-webinar%23Register%3Futm_source=newsletter%26utm_medium=referral%26utm_campaign=tldr/5/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/62OJ_81CHD_GjOVhJnbtStiIoCvim0ooBLMLUrGzmCs=439" rel="noopener noreferrer nofollow" target="_blank"><span>Save your spot</span></a>
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<strong>Red Hat Expands Collaboration with NVIDIA (4 minute read)</strong>
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Red Hat expanded its collaboration with NVIDIA to deliver Day 0 support for the NVIDIA Rubin platform across Red Hat Enterprise Linux, OpenShift, and Red Hat AI. The partnership targets rack-scale enterprise AI with optimized performance, security, and hybrid cloud consistency.
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<strong>Introducing Apache Spark® 4.1 (6 minute read)</strong>
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Apache Spark 4.1 introduces Spark Declarative Pipelines (SDP) for a declarative data engineering approach, and enables Real-Time Mode in Structured Streaming to achieve single-digit millisecond latencies for stateless workloads. The update also delivers GA support for SQL Scripting, expands PySpark capabilities with Arrow integration, and enhances Spark Connect for machine learning.
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<strong>Kubernetes v1.35: A Better Way to Pass Service Account Tokens to CSI Drivers (4 minute read)</strong>
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Kubernetes v1.35 introduces a beta opt-in solution for CSI drivers, enabling them to securely receive service account tokens through the `secrets` field in `NodePublishVolumeRequest` instead of the less secure `volume_context`. This addresses past logging vulnerabilities, such as CVE-2023-2878, by providing a safer, more consistent method for handling sensitive data.
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<strong>Why we're leaving serverless (5 minute read)</strong>
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Unkey migrated from Cloudflare Workers to stateful Go servers, achieving 6x lower latency by eliminating external cache network requests and simplifying architecture from complex distributed pipelines to straightforward in-memory batching. The move enabled self-hosting and platform independence, improved developer experience, and reduced operational complexity.
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<strong>Software craftsmanship is dead (3 minute read)</strong>
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Modern software development prioritizes rapid feature delivery and short-term impact metrics over long-term code quality and maintainability. Incentive structures, Agile backlog pressure, low deployment risk, and a lack of emphasis on craftsmanship have collectively contributed to declining code quality across organizations.
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<strong>Making software engineers AI-native (Sponsor)</strong>
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AI-native engineering = <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fresolve.ai%2Fblog%2Frole-of-multi-agent-systems-AI-native-engineering%3Futm_source=tldr-devops%26utm_medium=3p-newsletter-1-9%26utm_campaign=ai-for-production-systems%26utm_id=ai-for-prod/2/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/lijAGgsjV1l1EIKBjXbrcjmOy6Elqt0vLFXOSOx84vg=439" rel="noopener noreferrer nofollow" target="_blank"><span>engineers set the goals and agents perform the work</span></a>. When agents handle log analysis, metric correlation, and timeline reconstruction during an incident, engineers can shift their focus to architectural decisions and system design rather than tactical investigation.
<p></p>
<p>Download the <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fresolve.ai%2Fresources%2Febook%2Fai-for-production-systems%3Futm_source=tldr-devops%26utm_medium=3p-newsletter-1-9%26utm_campaign=ai-for-production-systems%26utm_id=ai-for-prod/1/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/jpu_0GWP7hZurIjK_4VN6N1SLZ3Xq3oHRWvZO-hngyU=439" rel="noopener noreferrer nofollow" target="_blank"><span>free AI for Prod ebook</span></a> to learn more about how AI is changing core engineering workflows.
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<strong>Next AI Draw.io (GitHub Repo)</strong>
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Next AI Draw.io is an AI-powered Next.js web application that enables users to create, modify, and enhance draw.io diagrams using natural language commands and AI-assisted visualization. This tool supports various diagram types and recommends powerful models like Claude Sonnet 4.5 for optimal performance.
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<strong>OpenSpec (GitHub Repo)</strong>
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OpenSpec is a spec-driven development (SDD) framework for AI coding assistants that aims to align humans and AI by locking intent with a lightweight specification workflow before any code is written. The system provides deterministic, reviewable outputs, addressing the unpredictability of AI when requirements are confined to chat history.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fgrafana.com%2Fblog%2Fimprove-service-reliability-and-ops-culture-with-grafana-cloud-service-center%2F%3Futm_source=tldrdevops/1/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/I6_oeh6E0ohosxcaHpMDSlsLemSFVO1Ch6KjJ0RmW64=439">
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<strong>Improve service reliability and ops culture with Grafana Cloud Service Center (7 minute read)</strong>
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Grafana Cloud's Service Center provides a unified hub for monitoring service reliability, performance trends, incidents, SLOs, alerts, and on-call rotations to prevent engineer burnout and improve operational culture. The feature centralizes scattered data into service pages that help teams make data-driven decisions about reliability improvements and workload balancing.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.pgedge.com%2Fblog%2Fpostgresql-18-returning-enhancements-a-game-changer-for-modern-applications%3Futm_source=tldrdevops/1/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/aq3snqqRYEFIxKViSnXy8HBwkkAZKYINofpF3OKGISE=439">
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<strong>PostgreSQL 18 RETURNING Enhancements: A Game Changer for Modern Applications (7 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
PostgreSQL 18 significantly enhances the RETURNING clause by introducing OLD and NEW aliases across INSERT, UPDATE, DELETE, and MERGE, enabling developers to access before-and-after row values in a single atomic statement. This removes the need for triggers or extra queries, simplifies change tracking and auditing, and makes MERGE-based upserts far more powerful and maintainable.
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<strong>A closer look at a BGP anomaly in Venezuela (9 minute read)</strong>
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A routing leak in Venezuela on January 2, involving AS8048 (CANTV), was noted by a cybersecurity newsletter amid news of Nicolás Maduro's capture, initially suggesting potential malfeasance. However, Cloudflare Radar data showed eleven similar, likely accidental, Type 1 hairpin route leaks by CANTV since early December, indicating the issue stemmed from insufficient routing export and import policies rather than malicious intent.
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<strong>Deploy Microservices On AKS using GitHub Actions (2 minute read)</strong>
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GitHub Actions automates CI/CD pipelines for deploying microservices to Azure Kubernetes Service by building Docker images, pushing them to Azure Container Registry, and deploying to AKS clusters using kubectl.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.cncf.io%2Fblog%2F2026%2F01%2F07%2Fholmesgpt-agentic-troubleshooting-built-for-the-cloud-native-era%2F%3Futm_source=tldrdevops/1/0100019ba2ba6142-f5d10720-bef8-4cb8-9338-6d86500d8e80-000000/DwpI9qw_UCglzCD6tPGbfs_5MtaDR4ctneS3A8gCZxk=439">
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<strong>HolmesGPT: Agentic troubleshooting built for the cloud native era (2 minute read)</strong>
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HolmesGPT, an open-source AI troubleshooting agent for Kubernetes and cloud-native environments, was accepted as a CNCF Sandbox project in October.
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