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Aleksander Cynarski
2026-03-25 00:05:57 +01:00
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08-Słownik-K8s/StatefulSet.md Normal file
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# StatefulSet
#kubernetes #workload #słownik
## Co to jest?
**StatefulSet** zarządza podami ze **stabilną tożsamością** - stały hostname, ordered deployment/scaling, i persistent storage per pod.
## Różnica vs Deployment
| | StatefulSet | [[Deployment]] |
|---|-------------|------------|
| Pod names | Ordered: `nats-0`, `nats-1` | Random: `nats-7d8f9-abc` |
| Scaling | Sekwencyjne (0, 1, 2...) | Równoległe |
| Storage | PVC per pod (stałe) | Shared lub brak |
| Network | Stable DNS per pod | Load-balanced Service |
## Użycie w Sympozium
**NATS JetStream** jest deployowany jako StatefulSet:
- Stały hostname (`nats-0.nats.sympozium-system.svc`)
- Persistent storage dla JetStream data
- Durable event bus z replay capability
---
Powiązane: [[NATS JetStream - Event Bus]] | [[Deployment]] | [[Pod]]