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:dC6DWwcnR6zeFEhd3kgIO1PN3djVfVBhfiHCxjicOXw="
  timezone: "Asia/Taipei"

  configuration: |-
    $config['distributed_poller'] = true;
    $config['distributed_poller_group'] = 0;
    $config['rrdcached'] = "librenms-rrdcached:42217";
    ### RRD 設定
    $config['rrd_dir'] = "/data/rrd";
    $config['rrdtool_version'] = "1.8.0";
    ### 確保使用 UTC 時間戳
    $config['rrd']['step'] = 300;
    $config['rrd']['heartbeat'] = 600;

  image:
    repository: librenms/librenms
    tag: "25.11.0"

  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 服務 (不再包含 persistence 設定)
  # ----------------------------------------------
  rrdcached:
    enabled: true

    persistence:
      enabled: true
      journal:
        size: 1Gi
        storageClassName: "nfs-client"
      rrdcached:
        size: 10Gi	  
        storageClassName: "nfs-client"
 
    envs:
      - name: WRITE_JITTER
        value: "1800"
      - name: WRITE_TIMEOUT
        value: "1800"
      - name: LOG_LEVEL
        value: "LOG_INFO"
      # 關鍵：確保 rrdcached 監聽所有介面
      - name: LISTEN
        value: "0.0.0.0:42217"

    resources:
      requests:
        cpu: 100m
        memory: 500Mi
      limits:
        cpu: 500m
        memory: 1Gi
 
# ----------------------------------------------
# MySQL（採用 Bitnami 內建，可用 NFS 做為 PVC）
# ----------------------------------------------
mysql:
  enabled: true
  architecture: standalone
  image:
    repository: bitnamilegacy/mysql
  auth:
    rootPassword: "change_me_root"
    password: "change_me_librenms"
    database: "librenms"
    username: "librenms"

  primary:
    extraEnvVars:
      - name: TZ
        value: "Asia/Taipei"
      - name: MYSQL_EXTRA_FLAGS
        value: "--default-time-zone=+08:00"

    extraFlags: "--default-time-zone=+08:00 --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci"

    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

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