# Pinned chart: grafana/loki 7.3.0 (app 3.6.12).
# Install (deferred to deploy task, namespace prometheus):
#   helm upgrade --install loki grafana/loki --version 7.3.0 \
#     --namespace prometheus --values loki/k8s/loki-values.yaml --wait
# SingleBinary, filesystem storage on local-path-retain, 14d retention.
# No IngressRoute: Loki is cluster-internal, queried via Grafana datasource.

deploymentMode: SingleBinary

loki:
  # Multitenancy off: single-node homelab, gateway + Alloy + Grafana talk to one tenant.
  auth_enabled: false
  image:
    tag: "3.6.12"
  commonConfig:
    # Single replica: default RF=3 would require 3 ingesters and fail all writes.
    replication_factor: 1
  storage:
    type: filesystem
  schemaConfig:
    configs:
      - from: "2024-04-01"
        store: tsdb
        object_store: filesystem
        schema: v13
        index:
          prefix: index_
          period: 24h
  compactor:
    retention_enabled: true
    delete_request_store: filesystem
  limits_config:
    retention_period: 336h
  rulerConfig:
    wal:
      dir: /var/loki/ruler-wal
    storage:
      type: local
      local:
        directory: /var/loki/rules

# p95 84M, max 85M for the rules sidecar that shares the singleBinary pod.
# The chart exposes it as `sidecar.resources`, shared with any other sidecar.
sidecar:
  resources:
    requests:
      memory: "96Mi"
      cpu: "10m"
    limits:
      memory: "192Mi"

singleBinary:
  replicas: 1
  persistence:
    enabled: true
    size: 20Gi
    storageClass: local-path-retain
  resources:
    requests:
      memory: "256Mi"
      cpu: "200m"
    limits:
      memory: "1Gi"
      cpu: "1000m"

# Zeroed: unused in SingleBinary mode (chart validation requires it).
write:
  replicas: 0
read:
  replicas: 0
backend:
  replicas: 0

gateway:
  replicas: 1
  # Single node: chart default is required podAntiAffinity on hostname +
  # RollingUpdate 25%/25% (effective maxUnavailable=0 at replicas=1).
  # That deadlocks the rollout: the new pod stays Unschedulable while the
  # old one lives, and the old one never leaves while the new one is not
  # Ready. Null clears the default (an empty map would deep-merge with it
  # and keep the required rule); maxUnavailable=1 allows a brief gateway
  # outage during rollouts instead of a stuck deploy.
  affinity: null
  deploymentStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  resources:
    requests:
      memory: "32Mi"
      cpu: "50m"
    limits:
      memory: "128Mi"
      cpu: "300m"

monitoring:
  serviceMonitor:
    enabled: true
    labels:
      release: prometheus-stack
    interval: 15s
  rules:
    enabled: true
    namespace: prometheus
    labels:
      release: prometheus-stack

# Disabled: memcached caches don't fit a memory-tight single node.
# SingleBinary works without them (slower repeated queries, fine at homelab scale).
resultsCache:
  enabled: false
chunksCache:
  enabled: false

# Disabled: synthetic canary traffic + helm test pod, noise on a single node.
lokiCanary:
  enabled: false
test:
  enabled: false