This morning's deploy wave left dozens of pods in ImagePullBackOff, and the registry says rate limit. Why us, and what now?

A public registry throttles by source IP and your whole fleet shares one. Why fifty nodes count as a single anonymous user, and authentication and caching changes that reduce upstream demand.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

A public registry throttles by source IP and your whole fleet shares one. Why fifty nodes count as a single anonymous user, and authentication and caching changes that reduce upstream demand.

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Next in this trackThe secrets manager blipped for ten minutes overnight, and applications restarting hours later are still failing. Explain the cascade.Next in this trackNothing crashed, but over a week TLS verifies oddly and cron jobs double-fire. Time is suspected. How do you triage a whole fleet?Next in this trackAfter a VLAN migration, a VIP answers from some subnets and times out from others. Someone shouts duplicate IP. Prove it.

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