Slack multi-cloud AI, AWS Resilience Hub, Mercari Cloudflare

When a multi‑architecture image is pulled through ACR Artifact Cache, only the manifest list and the specific architecture’s manifest are cached, while other architectures remain upstream until requested. The cache then asynchronously copies these artifacts, and ACR push webhooks fire once the copy finishes, indicating the image is fully stored locally and storage charges start.

AWS launches the next‑gen Resilience Hub, letting SREs define modular resilience policies, map business‑critical paths, and run generative AI‑powered failure‑mode assessments. Integrated with AWS Organizations, it auto‑discovers dependencies and provides enterprise‑wide reporting to validate compliance across hundreds of accounts.

A senior SRE details how SLIs and reliability dashboards become misleading as services evolve, with green screens masking real customer issues. The post outlines recurring failure patterns across major observability stacks and stresses the need for continual metric reassessment to keep reliability signals accurate.

Mercari's Platform Network team moved a long‑standing image resizing service to Cloudflare Images while keeping all existing URLs alive by running legacy and new paths in parallel and using Cloudflare edge origin overrides with S3 host‑header HTTPS. The post details traffic estimation, safe rollout tactics, and cost trade‑offs for a seamless migration.

Slack re‑engineered its AI serving stack over three years, moving from AWS SageMaker to Bedrock, then to a hybrid architecture across AWS and Google Cloud. The new multi‑cloud setup aims to cut scaling latency, avoid GPU shortages, and keep pace with the latest LLM advances, targeting full deployment by early 2026.

A Terraform‑first AWS startup built ISO‑27001 certification by codifying infrastructure, access controls, encryption, monitoring, and vulnerability management. This allowed audit evidence to be generated directly from Terraform definitions, ensuring continuous compliance and faster enterprise sales. The post details the process and lessons learned.