scriptable-prometheus-example.js

scriptable-prometheus-example.js

const PROMETHEUS_ENDPOINT = 'prometheus.example.com'

const fetchMetric = async (query) => {
  const url = `https://${PROMETHEUS_ENDPOINT}/api/v1/query?query=${encodeURIComponent(query)}`
  const req = new Request(url)
  return req.loadJSON()
}

const getPVCAvailability = (pvc) => {
  return fetchMetric(`kubelet_volume_stats_available_bytes{persistentvolumeclaim="${pvc}"}`)
}

const filmsPvc = await getPVCAvailability('films')

let size = ''

if (Array.isArray(filmsPvc?.data?.result)) {
  const [, bytes] = filmsPvc.data.result[0]?.value ?? []

  size = `${(bytes / 1000 ** 3).toFixed(2)} GB`
} else {
  size = 'ERROR'
}

let listWidget = new ListWidget()

const valueText = listWidget.addText(size)
valueText.centerAlignText()
valueText.textColor = Color.dynamic(new Color('#333'), new Color('#fff'))
valueText.font = new Font('HelveticaNeue-Bold', 22)

listWidget.addSpacer(5)

const titleText = listWidget.addText("Free (Suplex)")
titleText.centerAlignText()
titleText.textColor = Color.dynamic(new Color('#aaa'), new Color('#c9c9c9'))
titleText.font = new Font('HelveticaNeue-Bold', 14)

Script.setWidget(listWidget)
Script.complete()