docs(#70): add docs for challenge instance controller

[cfi2017]

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[cfi2017]

what we used for the quals

apiVersion: v1
kind: Namespace
metadata:
  name: infra-cdi
  labels:
    pod-security.kubernetes.io/enforce: privileged
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: generic-cdi-plugin-daemonset
  namespace: infra-cdi
spec:
  selector:
    matchLabels:
      name: generic-cdi-plugin
  template:
    metadata:
      labels:
        name: generic-cdi-plugin
        app.kubernetes.io/component: generic-cdi-plugin
        app.kubernetes.io/name: generic-cdi-plugin
    spec:
      initContainers:
      - name: copy-cdi-json
        image: busybox
        command:
          - sh
          - -c
          - cp /etc/cdi/nfits.json /host-cdi/nfits.json
        volumeMounts:
        - name: cdi-json
          mountPath: /etc/cdi/nfits.json
          subPath: nfits.json
        - name: host-cdi
          mountPath: /host-cdi
      containers:
      - image: ghcr.io/olfillasodikno/generic-cdi-plugin:main
        name: generic-cdi-plugin
        command:
          - /generic-cdi-plugin
          - /etc/cdi/nfits.json
        imagePullPolicy: Always
        securityContext:
          privileged: true
        tty: true
        volumeMounts:
        - name: kubelet
          mountPath: /var/lib/kubelet
        - name: cdi-json
          mountPath: /etc/cdi/nfits.json
          subPath: nfits.json
      volumes:
      - name: kubelet
        hostPath:
          path: /var/lib/kubelet
      - name: cdi-json
        configMap:
          name: cdi-json
          items:
            - key: nfits.json
              path: nfits.json
      - name: host-cdi
        hostPath:
          path: /var/run/cdi
          type: DirectoryOrCreate
---
apiVersion: v1
data:
  nfits.json: |
    {"cdiVersion":"0.5.0","containerEdits":{"deviceNodes":[],"hooks":[],"mounts":[]},"devices":[{"containerEdits":{"deviceNodes":[{"path":"/dev/kvm"}],"hooks":[]},"name":"kvm"}],"kind":"nfits.de/devices"}
kind: ConfigMap
metadata:
  name: cdi-json
  namespace: infra-cdi

requires tagging the node appropriately and setting taints