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=

# ========================================
# 完整、可直接使用的 librenms-values.yaml
# ========================================
global:
  storageClass: "nfs-client"      # 你的 NFS provisioner 名稱
 
# ---------- 主要 LibreNMS ----------
librenms:
  appkey: "base64:SkGsCIF2TZtQZx8swneh80I1sHQ3AYRD8UCkeze70Bs="
  timezone: "Asia/Taipei"
 
  # 分散式 poller 必要設定
  configuration: |-
    $config['distributed_poller'] = true;
    $config['distributed_poller_group'] = 0;
    $config['poller_id'] = php_uname('n');

  image:
    repository: librenms/librenms
    tag: "24.5.0"
    pullPolicy: IfNotPresent
 
  # 讓所有 pod 都從 secret 讀資料庫密碼與 APP_KEY（安全）
  extraEnv:
    - name: APP_KEY
      valueFrom:
        secretKeyRef:
          name: librenms-secret
          key: app-key
    - name: DB_HOST
      value: "librenms-mysql"
    - name: DB_DATABASE
      value: "librenms"
    - name: DB_USERNAME
      value: "librenms"
    - name: DB_PASSWORD
      valueFrom:
        secretKeyRef:
          name: librenms-secret
          key: db-password
 
  # 關鍵：讓 /opt/librenms 完整掛到 NFS（包含所有 rrd）
  persistence:
    enabled: true
    storageClass: "nfs-client"
    accessModes:
      - ReadWriteMany
    size: 50Gi                     # 建議一次給大，rrd 很吃空間
    mountPath: /opt/librenms       # 必須掛在這裡
 
  # 自動建立 admin 帳號 + 第一次安裝
  extraInitContainers:
    - name: librenms-setup
      image: librenms/librenms:24.5.0
      command: ["/bin/bash", "-c"]
      args:
        - |
          # 第一次安裝
          if [ ! -f /opt/librenms/.env ] || ! grep -q "APP_KEY=" /opt/librenms/.env; then
            echo "Running librenms:install..."
            php /opt/librenms/artisan librenms:install --no-interaction
          fi
 
          # 建立 admin 帳號（不會重複建立）
          if ! php /opt/librenms/artisan user:list --no-ansi | grep -q "admin.*Administrator"; then
            echo "Creating default admin user..."
            php /opt/librenms/artisan user:add admin \
              --password=librenms \
              [email protected] \
              --role=admin \
              --name="Administrator" \
              --no-interaction
          fi
 
          chown -R librenms:librenms /opt/librenms
      volumeMounts:
        - name: data
          mountPath: /opt/librenms

  frontend:
    replicas: 1
    resources:
      requests:
        cpu: 250m
        memory: 512Mi
      limits:
        cpu: 1000m
        memory: 1Gi

  poller:
    replicas: 3
    resources:
      requests:
        cpu: 500m
        memory: 1Gi
      limits:
        cpu: 2000m
        memory: 2Gi
 
# ---------- RRDcached（獨立大容量 NFS） ----------
rrdcached:
  enabled: true
  persistence:
    enabled: true
    journal:
      enabled: true
      size: 2Gi
      storageClass: "nfs-client"
      accessMode: ReadWriteMany
    rrdcached:
      enabled: true
      size: 100Gi                 # 真正吃空間的地方，建議 50~200Gi
      storageClass: "nfs-client"
      accessMode: ReadWriteMany
  envs:
    - name: TZ
      value: "Asia/Taipei"
 
# ---------- MySQL ----------
mysql:
  enabled: true
  architecture: standalone
  auth:
    database: librenms
    username: librenms
    existingSecret: librenms-secret
    existingSecretPasswordKey: db-password
    rootPassword: "change_me_root"
  primary:
    persistence:
      enabled: true
      size: 20Gi
      storageClass: "nfs-client"
      accessModes:
        - ReadWriteOnce
    resources:
      requests:
        cpu: 250m
        memory: 1Gi
 
# ---------- Redis ----------
redis:
  enabled: true
  architecture: standalone
  auth:
    enabled: false
  master:
    persistence:
      enabled: true
      size: 2Gi
      storageClass: "nfs-client"
      accessModes:
        - ReadWriteOnce
 
# ---------- Ingress ----------
ingress:
  enabled: true
  className: nginx
  annotations:
    nginx.ingress.kubernetes.io/proxy-body-size: "64m"
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
  hosts:
    - host: librenms.k3s.ichiayi.com
      paths:
        - path: /
          pathType: Prefix
  tls:
    - secretName: wildcard-k3s-ichiayi-com-tls
      hosts:
        - librenms.k3s.ichiayi.com

php /opt/librenms/artisan user:add admin \
  --password=librenms \
  [email protected] \
  --role=admin