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Lessons (5)

• Internals, Upgrades, Resilience and Interview Questions

  … cordon, drain (respecting PDBs), replace. 5. Test in a staging cluster first and have a rollback plan. bash …

• Resources, QoS and Scheduling Control

  … Combine them for dedicated nodes. - Add a PDB to every production workload with more than one replica.

• GitOps, Progressive Delivery and Observability

  … preemptible nodes for fault-tolerant workloads, protected by PDBs and topology spread. - Tools such as Kubecost or OpenCost …

• Monolith vs Microservices

  … svc] -- ODB[(orders DB)] GW -- PS[Payments svc] -- PDB[(payments DB)] OS -. events .- IS[Inventory svc] -- IDB[(inventory …

• Data in Microservices: Sagas & the Outbox Pattern

  … per service"] O[Orders] -- ODB[(orders)] P[Payments] -- PDB[(payments)] O -. API / events .- P end subgraph Bad["❌ Shared …