# services/logging/node-image-prune-rpi5-script.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: node-image-prune-rpi5-script
  namespace: logging
data:
  node_image_prune_rpi5.sh: |
    #!/usr/bin/env bash
    set -euo pipefail

    threshold=70

    sleep "$(( (RANDOM % 300) + 10 ))"

    while true; do
      usage=$(df -P /host | awk 'NR==2 {gsub(/%/,"",$5); print $5}')
      if [ -z "${usage}" ]; then
        sleep 1800
        continue
      fi

      if [ "${usage}" -ge "${threshold}" ]; then
        chroot /host /bin/sh -c '
          if command -v crictl >/dev/null 2>&1; then
            crictl --runtime-endpoint=unix:///run/k3s/containerd/containerd.sock rmi --prune || true
          elif [ -x /usr/local/bin/crictl ]; then
            /usr/local/bin/crictl --runtime-endpoint=unix:///run/k3s/containerd/containerd.sock rmi --prune || true
          fi
        '
      fi

      sleep 21600
    done