Deployment Strategy

This section describes the deployment strategy for the Grafana Loki Stack on an on-premise Kubernetes cluster using Helm charts and persistent volumes.

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1. Overview

We use Helm for managing deployment lifecycle of each component. All components are deployed via helm upgrade --install with customized values.yaml files.

Component	Deployment Type	Helm Chart Source
Loki	StatefulSet	grafana/loki-stack
Promtail	DaemonSet	grafana/promtail
Grafana	Deployment	grafana/grafana
MinIO	StatefulSet	bitnami/minio or minio/minio
Ingress	Controller	nginx/nginx-ingress

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2. Deployment Steps

🔹 Step 1: Add Helm Repos

helm repo add grafana https://grafana.github.io/helm-charts
helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo update

🔹 Step 2: Deploy MinIO (S3-compatible storage)

helm install minio bitnami/minio \
  --namespace logging \
  --create-namespace \
  -f minio-values.yaml

Example minio-values.yaml:

mode: distributed
replicas: 4
persistence:
  enabled: true
  size: 100Gi
resources:
  requests:
    memory: 512Mi
    cpu: 250m

🔹 Step 3: Deploy Loki Stack

helm upgrade --install loki grafana/loki-stack \
  --namespace logging \
  -f loki-values.yaml

Example loki-values.yaml:

loki:
  storage:
    type: 's3'
    s3:
      bucketnames: loki-data
      endpoint: http://minio.logging.svc.cluster.local:9000
      access_key_id: lokiadmin
      secret_access_key: lokipassword
      insecure: true
  persistence:
    enabled: true
    size: 50Gi
    storageClassName: "nfs"  # or "cephfs"
  schemaConfig:
    configs:
      - from: 2022-01-01
        store: boltdb-shipper
        object_store: s3
        schema: v11
        index:
          prefix: index_
          period: 24h

promtail:
  enabled: true
  config:
    clients:
      - url: http://loki:3100/loki/api/v1/push

🔹 Step 4: Deploy Grafana

helm upgrade --install grafana grafana/grafana \
  --namespace logging \
  -f grafana-values.yaml

Example grafana-values.yaml:

adminPassword: admin123
persistence:
  enabled: true
  size: 10Gi
datasources:
  datasources.yaml:
    apiVersion: 1
    datasources:
      - name: Loki
        type: loki
        access: proxy
        url: http://loki:3100
ingress:
  enabled: true
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
  hosts:
    - grafana.example.local

3. Resource Recommendations

Component	CPU	Memory	Storage
Promtail	100–200m	100–200Mi	—
Loki Ingesters	500m–1CPU	1–2Gi	50Gi PVC
Querier	500m	512Mi	—
MinIO Node	500m–1CPU	1Gi	100Gi per pod
Grafana	300m	512Mi	10Gi PVC