provision.js

const fs = require('fs')
const Linode = require('./linode.js')
const path = require('path')

const SETTINGS = {
  SSH_PUB_KEYS: process.env.SSH_PUB_KEYS,
  SERVER_ROOT_PASS: process.env.SERVER_ROOT_PASS || 'some_pass',
  BRANCH: process.env.BRANCH || 'master',
  ACTIVE_SERVER_COUNT: Number(process.env.ACTIVE_SERVER_COUNT) || 3
}

const infraSync = async () => {
  console.info(`Deploying: ${SETTINGS.BRANCH}`)
  console.info('--- manage script ---')
  console.info('[INFO] updating #yacs-rcos script')

  const script = await Linode.script.update(639784, {
    images: ['linode/ubuntu18.04'],
    label: 'yacs-rcos',
    is_public: false,
    script: fs.readFileSync(path.join(__dirname, './scripts/configure.sh'), 'utf8'),
    description: 'Start YACS with some branch'
  })

  // ------------ VMS

  console.info('--- manage vm(s) ---')
  console.info('[INFO] fetching all #yacs-rcos vms')
  const vms = await Linode.node.list()
  console.log(`[INFO] currently, ${vms.length} vms are running/active`)

  // fetch current to delete later
  const rcosVmIds = vms
    .filter(vm => vm.tags.includes('yacs-rcos'))
    .sort((a, b) => Date(a.created) - Date(b.created)) // sort by date created, earliest created first
    .map(vm => vm.id)

  // create a new vm
  console.info('[INFO] creating #yacs-rcos node')
  const info = await Linode.node.create({
    image: 'linode/ubuntu18.04', // or 'linode/ubuntu16.04lts'
    root_pass: SETTINGS.SERVER_ROOT_PASS,
    authorized_keys: SETTINGS.SSH_PUB_KEYS.split('\n').filter(Boolean),
    type: 'g6-nanode-1',
    region: 'us-east',
    tags: ['yacs-rcos'],
    stackscript_id: script.id,
    stackscript_data: {
      branch: SETTINGS.BRANCH
    }
  })

  // delete existing vm(s) after creation
  let amountToRemove = (rcosVmIds.length + 1) - SETTINGS.ACTIVE_SERVER_COUNT // plus one since we just added one

  // after drop-all, no need to remove any so will be negative
  if (amountToRemove < 0) {
    amountToRemove = 0
  }

  console.info(`[INFO] deleting old vm(s) by tag #yacs-rcos that surpass server allotment of ${SETTINGS.ACTIVE_SERVER_COUNT}`)
  console.info(`[INFO] amount to remove: ${amountToRemove}`)
  // rcosVmIds is sorted, this allows us to remove the oldest server(s)
  for (let i = 0; i < amountToRemove; i++) {
    console.info(`[INFO] deleting vm: ${rcosVmIds[i]}`)
    await Linode.node.remove(rcosVmIds[i])
  }

  // print ip
  // USED IN GITHUB ACTIONS PIPELINE TO SHOW MESSAGE IN PR
  // DO NOT REFORMAT
  console.log(`https://${info.ipv4[0]}`)

}

infraSync()