Kubernetes
Kubernetes incidents: first 10
From reading Pod states to image pulls, rolling updates, resource limits, and node failures.
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Study paths
Reviewed problems grouped from easy to hard. Finish a path and you will have worked through the signature incidents of that area once.
Log in to track submitted problems as progress.
A pod is Running and one Service still has no endpoints
Linux
Linux server incidents: first week
The 10 most common server incidents: disk, file descriptors, permissions, cron, systemd, memory, and I/O.
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CI/CD
CI/CD deployment incidents: 10 problems
Green pipelines, broken deploys: dependencies, registries, tokens, health checks, and rollbacks.
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Network
Network incident basics: 10 problems
DNS, firewall rules, proxy 502/504, packet captures, and routing — where to look when connections fail.
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Security
Security operations incidents: 10 problems
Certificates, SSH access, CORS, access policies, leaked keys, and offboarded accounts.
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13 incidents everyone hits once
OOMKilled, 502/504, too many open files, expired certificates, leaked keys — the most searched incidents.
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Information Processing Engineer practical: 2025 round 3
20 reconstructed exam questions in the original order: code, SQL, security, and networking.
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