在 K3s 環境透過 Rancher 建立 LibreNMS

helm repo add librenms https://www.librenms.org/helm-charts
helm repo update

$ echo "base64:$(head -c 32 /dev/urandom | base64)"
base64:SkGsCIF2TZtQZx8swneh80I1sHQ3AYRD8UCkeze70Bs=

librenms:
  appkey: "base64:SkGsCIF2TZtQZx8swneh80I1sHQ3AYRD8UCkeze70Bs="
  timezone: "Asia/Taipei"

  configuration: |-
    $config['distributed_poller'] = true;
    $config['distributed_poller_group'] = 0;

  image:
    repository: librenms/librenms
    tag: "24.5.0"

  frontend:
    replicas: 1
    resources:
      requests:
        cpu: 200m
        memory: 512Mi
      limits:
        cpu: 500m
        memory: 1Gi

  poller:
    replicas: 3
    resources:
      requests:
        cpu: 500m
        memory: 1Gi
      limits:
        cpu: 1
        memory: 2Gi
 
  # ----------------------------------------------
  # RRDcached（需要大量持續寫入 — 強烈建議使用 PVC）
  # ----------------------------------------------
  rrdcached:
    enabled: true
    persistence:
      enabled: true
 
      # RRD journal（小，主要寫快取）
      journal:
        enabled: true
        size: 1Gi
        storageClass: nfs-client
        accessMode: ReadWriteMany
 
      # RRD raw data（大，所有 LibreNMS graph 都存這裡）
      rrdcached:
        enabled: true
        size: 10Gi
        storageClass: nfs-client
        accessMode: ReadWriteMany

    envs:
      - name: TZ
        value: "Asia/Taipei"
 
# ----------------------------------------------
# MySQL（採用 Bitnami 內建，可用 NFS 做為 PVC）
# ----------------------------------------------
mysql:
  enabled: true
  architecture: standalone
  auth:
    rootPassword: "change_me_root"
    password: "change_me_librenms"
    database: "librenms"
    username: "librenms"

  primary:
    persistence:
      enabled: true
      size: 10Gi
      storageClass: nfs-client
      accessModes:
        - ReadWriteOnce   # MySQL 建議 RWO（安全）
    resources:
      requests:
        cpu: 200m
        memory: 512Mi
 
# ----------------------------------------------
# Redis（建議用 NFS PVC, 但也可用 emptyDir）
# ----------------------------------------------
redis:
  enabled: true
  architecture: standalone
  master:
    persistence:
      enabled: true
      size: 2Gi
      storageClass: nfs-client
      accessModes:
        - ReadWriteOnce
    resources:
      requests:
        cpu: 100m
        memory: 256Mi
 
# ----------------------------------------------
# Ingress
# ----------------------------------------------
ingress:
  enabled: true
  className: nginx
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/proxy-body-size: "64m"
    nginx.ingress.kubernetes.io/ssl-redirect: "false"  
  hosts:
    - host: librenms.k3s.ichiayi.com
      paths:
        - path: /
          pathType: Prefix
  tls:
    - secretName: wildcard-k3s-ichiayi-com-tls
      hosts:
        - librenms.k3s.ichiayi.com

helm install librenms -f librenms-values.yaml librenms/librenms