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<div style="display: none; max-height: 0px; overflow: hidden;">Kyverno 1.15 enhances Kubernetes policy management with new CEL-based policy types, introducing MutatingPolicy, GeneratingPolicy, and DeletingPolicy </div>
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<h1><strong>TLDR DevOps <span id="date">2025-09-01</span></strong></h1>
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<strong>Free Copy of the The Forrester Wave report for DevOps Platforms, Q2 2025 (Sponsor)</strong>
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Forrester analysts looked at the <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.atlassian.com%2Fforrester%2Fforrester-wave-devops%3Futm_source=newsletter-email%26utm_medium=email%26utm_campaign=P:jira-service-management*O:clm*C:newsl*H:fy26q1*I:tldr-forrester-devops*%26utm_sfdc-campaign_id=701QB00000SlmhHYAR/3/0100019905050fbe-f5be0432-36a3-4195-8fd4-161c3c098fbd-000000/WSOaLnO_cgS2n1kQpKuI6L-RD4Yp0VFHpiqYDqZRMRc=420" rel="noopener noreferrer nofollow" target="_blank"><span>11 leading DevOps platforms</span></a> - including tools from Atlassian, Microsoft, Harness, and GitLab.
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Kyverno 1.15 enhances Kubernetes policy management with new CEL-based policy types. It introduces MutatingPolicy, GeneratingPolicy, and DeletingPolicy, all of which convert automatically to Kubernetes admission controllers. The update shows significant performance improvements when using ValidatingPolicy over traditional ClusterPolicy for Pod Security Standards (PSS) enforcement.
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Kubernetes 1.34 introduced a new alpha feature, "Container Restart Policy and Rules," allowing users to define restart policies for individual containers within a Pod. This feature, enabled behind the ContainerRestartRules feature gate, provides granular control over container restarts based on exit codes, addressing limitations of the previous Pod-level restart policy. It can be useful for long-running AI/ML workloads where in-place restarts of failed containers with retriable exit codes are needed for better resource utilization.
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GitHub's Secret Protection team used Copilot to accelerate the expansion of validity checks, a feature that verifies whether leaked credentials are active. By integrating Copilot into their repeatable framework-driven workflow, they scaled coverage from 32 to nearly 120 token types in weeks, while engineers focused on research, review, and nuanced decisions.
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<div style="text-align: center;"><strong><h1>Miscellaneous</h1></strong></div>
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<strong>How Should Prometheus Handle OpenTelemetry Resource Attributes? - A UX Research Report (9 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
A Prometheus project focused on improving the user experience of handling OpenTelemetry resource attributes. The research revealed major pain points such as complex joins, poor documentation, and mismatched mental models, leading to recommendations for better documentation, clearer patterns like telescoping, and longer-term architectural solutions for metadata and interoperability.
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<strong>Replacing a cache service with a database (4 minute read)</strong>
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Caches provide pre-computed data at ultra-low latencies and offer fine-grained control, eviction policies, and lightweight scaling that databases cannot yet match. While partial replicas, incremental view maintenance, and advanced structures may narrow the gap, caches remain indispensable because databases are still too heavy, costly, and connection-limited for typical cache workloads.
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<h1><strong>Quick Links</strong></h1>
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<strong>appjet: AI coding for fullstack projects (Sponsor)</strong>
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An AI coding + deployment platform integrated with GitHub. Understands your entire codebase, speaks every programming language from Rust to Python, deploys on a global edge network in seconds. <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fappjet.ai%2F%3Ftdlr1/1/0100019905050fbe-f5be0432-36a3-4195-8fd4-161c3c098fbd-000000/Qi0UtLiyFsjP9tt9MODNiremg431HIPN1jjPlyglV1A=420" rel="noopener noreferrer nofollow" target="_blank"><span>Start building (free)</span></a>
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<strong>Python: The Documentary (2 minute read)</strong>
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Python: The Documentary is now fully available on YouTube.
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<strong>Amazon EBS launches snapshot copy for AWS Local Zones (1 minute read)</strong>
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Amazon EBS announced the general availability of snapshot copy for AWS Local Zones, enabling snapshots to be copied to a Region or another Local Zone for compliance and business needs.
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<strong>Do the simplest thing that could possibly work (7 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Good software design comes from doing the simplest thing that could possibly work—starting with the least complex solution and only adding more when new requirements demand it.
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