https://sudonull.com/nr-712-lte-cat-12-router-for-weak-signal
Deploy stable 100 Mbps LTE in a remote area with NR-712. MIMO 4×4 setup, band lock B3, PoE. Benchmarks, failover. Instructions for devops.
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https://sudonull.com/kubernetes-30-nodes-failure-test
How disabling 30% nodes revealed Kyverno and scheduling problems in production Kubernetes. Training plan, checklists for devops, success criteria. Learn how to improve HA.
https://sudonull.com/proxy-balancing-for-n8n-in-docker-fixing-dns-errors
Step-by-step setup of fault-tolerant 3proxy for n8n in Docker. Fixing DNS timeouts and access errors. Ready docker-compose and config.
https://sudonull.com/dr-plan-critical-services-and-failure-points
Learn how to create a disaster recovery plan: from identifying services to analyzing dependencies. Practical steps for sysadmin middle/senior. Start DR planning today.
https://sudonull.com/la-liga-blocks-break-docker-in-spain
IP blocks by La Liga cause docker pull failures, GitHub Actions and Vercel on weekends. Solutions: mirrors, VPN, runners outside Spain. Guide for devops with examples.
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