https://github.com/halkeye/kubernetes-usb-labeler

https://github.com/halkeye/kubernetes-usb-labeler

Last synced: 3 months ago
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• Host: GitHub
• URL: https://github.com/halkeye/kubernetes-usb-labeler
• Owner: halkeye
• License: mit
• Created: 2020-03-29T04:04:07.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2021-03-12T00:11:32.000Z (over 4 years ago)
• Last Synced: 2025-03-23T22:16:36.787Z (3 months ago)
• Language: Go
• Homepage:
• Size: 42 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# usb-labeler-controller

Quick hack to add labels for each usb device on a node, to help with using affinity to pin nodes to nodes with devices

I don't know enough about usb identifiers nor kubernetes nodes to know if my current implementation is a good plan, but it does work for me

## Installation

```

# This is a configuration example for the node labeller which includes

# ClusterRole and ClusterRoleBinding definitions, as well as the 

# DeamonSet configuration that deploys the actual node labeller

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRole

metadata:

  name: usb-labeler

rules:

- apiGroups: [""]

  resources: ["nodes"]

  verbs: ["watch", "get", "list", "update"]

---

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRoleBinding

metadata:

  name: labeller

  namespace: default

roleRef:

  apiGroup: rbac.authorization.k8s.io

  kind: ClusterRole

  name: usb-labeler

subjects:

- kind: ServiceAccount

  name: default

  namespace: default

- kind: ServiceAccount

  name: default

  namespace: kube-system

---

apiVersion: apps/v1

kind: DaemonSet

metadata:

  name: usb-labeler

  namespace: kube-system

spec:

  selector:

    matchLabels:

      name: usb-labeler

  template:

    metadata:

      annotations:

        scheduler.alpha.kubernetes.io/critical-pod: ""

      labels:

        name: usb-labeler

    spec:

      tolerations:

      - key: CriticalAddonsOnly

        operator: Exists

      containers:

      - image: halkeye/usb-labeler-controller:latest

        name: usb-labeler

        env:

          - name: NODE_NAME

            valueFrom:

              fieldRef:

                fieldPath: spec.nodeName

        securityContext:

          privileged: true #Needed for /dev

          capabilities:

            drop: ["ALL"]

        resources:

          requests:

            memory: "10Mi"

            cpu: "1m"

          limits:

            memory: "128Mi"

            cpu: "500m"

        volumeMounts:

          - name: sys

            mountPath: /sys

          - name: dev

            mountPath: /dev

          - name: etc

            mountPath: /etc

      volumes:

        - name: sys

          hostPath:

            path: /sys

        - name: dev

          hostPath:

            path: /dev

        - name: etc

          hostPath:

            path: /etc

```

## Upgrades

* try out https://godoc.org/github.com/chipaca/snappy/interfaces/hotplug to do it with hotplug instead of polling