ceremonyclient/docker/chart/app-readme.md

Quilibrium-node chart

How to use

Run in docker dir

helm install -n default -f chart/values.yaml quilibrium-node chart

Storage Configuration Guide

1. emptyDir (Temporary Storage)

• An emptyDir volume is created when a Pod is assigned to a node
• Data persists only for the Pod's lifetime (deleted when the Pod is removed)
• Storage is backed by:
  • Node's default medium (disk/SSD) by default
  • RAM if emptyDir.medium: Memory is set

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2. hostPath (Node-Local Storage)

• Binds a directory from the host node's filesystem into the Pod
• Data persists even if the Pod is deleted
• Tied to the node's lifecycle

⚠️ Warnings

• replicaCount must be set to 1
• Not suitable for multi-node clusters
• Potential security risks (host system access)

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3. PVC (PersistentVolumeClaim - Production Storage)

• Dynamically provisions a PersistentVolume (PV) per Pod via volumeClaimTemplates
• Each Pod gets independent volume (e.g., pvc-quilibrium-node-0, pvc-quilibrium-node-1)
• Data survives:
  • Pod restarts
  • Rescheduling (if storage backend supports it)

Comparison Table

Feature	emptyDir	hostPath	PVC
Persistence	❌ Ephemeral	✅ Node-persistent	✅ Cluster-persistent
Multi-Node	✅ Supported	❌ Single-node only	✅ Supported
Production Ready	❌ No	❌ No	✅ Yes
Performance	High	Highest	Storage-dependent
Data Safety	Low	Medium	High