k3s k8s 快速部署轻量节点监控方案 beszel

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AI·GEN

关键洞察

在逛 Reddit 时看到这篇帖子发现 beszel 这个熟悉又陌生的名字。看了一下官网发现还支持 kubernetes 的部署，直接使用 daemonset 就可以在所有节点自动部署 agent ，虽然还需要手动在 hub 添加，但已经很方便,用了一下不错。

作为轻量级的 k3s/k8s 集群监控方案确实不错，比 kube-prometheus-stack 这样的庞然大物轻便太多，解决轻量的监控和告警需求。

下面直接贴出 hub和 agent 的 manifests ：

`hub`

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`agent`

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注意，agent 使用了hostNetwork 网络，实现对宿主机网络的监控并监听 45876 端口，需放通端口后在可以在 hub 加入。如果不使用这个模式，会收集不到网络数据，看到的带宽情况一直是 0.

References

hub

---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: beszel-zgus1-pvc
  namespace: beszel
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: local-zgus1
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: app
  namespace: beszel
  labels:
    app: beszel
spec:
  replicas: 1
  selector:
    matchLabels:
      app: beszel
  template:
    metadata:
      annotations: {}
      labels:
        app: beszel
    spec:
      #nodeSelector:
      #  kubernetes.io/hostname: zgocloud-us1
      containers:
        - name: app
          image: henrygd/beszel:0.11.1
          ports:
            - containerPort: 8090
              name: web
          env:
            - name: TZ
              value: "Asia/Shanghai"
          volumeMounts:
            - name: beszel-data
              mountPath: /beszel_data
      volumes:
        - name: beszel-data
          persistentVolumeClaim:
            claimName: beszel-zgus1-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: beszel
  namespace: beszel
spec:
  selector:
    app: beszel
  ports:
    - name: web
      port: 8090
      targetPort: 8090
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: beszel-ingress
  namespace: beszel
  annotations:
    cert-manager.io/cluster-issuer: "cf-cluster-issuer"
spec:
  ingressClassName: nginx
  tls:
  - hosts:
      - <YOUR DOMAIN>
    secretName: <YOUR DOMAIN TLS SECRET NAME>            
  rules:
  - host: <YOUR DOMAIN>
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: beszel
            port:
              name: web

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agent

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: agent
  namespace: beszel
spec:
  selector:
    matchLabels:
      app: agent
  template:
    metadata:
      labels:
        app: agent
    spec:
      hostNetwork: true
      containers:
        - env:
            - name: LISTEN
              value: '45876'
            - name: KEY
              value: 'YOUR-KEY-HERE'
          image: henrygd/beszel-agent:latest
          imagePullPolicy: Always
          name: beszel-agent
          ports:
            - containerPort: 45876
              hostPort: 45876
      restartPolicy: Always
      tolerations:
        - effect: NoSchedule
          key: node-role.kubernetes.io/master
          operator: Exists
        - effect: NoSchedule
          key: node-role.kubernetes.io/control-plane
          operator: Exists
  updateStrategy:
    rollingUpdate:
      maxSurge: 0
      maxUnavailable: 100%
    type: RollingUpdate

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