• Enable Cloud SQL Admin API
• Create Cloud Storage bucket. In this case, we use Nearline storage type since the purpose is to store a backup. You can also set the lifecycle of the object in the storage. Ex. All the object older than 3 month automatically archive or delete.
• Get the Cloud SQL instance service account and assign the related service account to the bucket with Storage/Bucket writer.
• Create New IAM Service account with role to the CloudSQL Admin API
• Create New Pub/Sub topic, Ex. named as “Backup-Payload”
• Create a Cloud Function
  • Name: The function name
  • Region : which geographic location you want the CloudFunction run.
  • Memory : The size of memory you want to allocate for the Cloud Function. I chose the smallest one
  • Trigger : Chose method to trigger the Cloudfunction, in this case the newly created Pub/Sub.
  • Runtime: Chose the runtime, in this example we got the function from Nodejs 10
  • Source Code : Use inline editor and input the function from the codes below
  • Function to Execute : input the function name from the codes.
  • Service account for the cloud function that created before.
• Create Cloud Scheduler
  • Name : The schedule name
  • Frequency : The time, you can use the cron format. In this case, we set the backup to run at 01.00 at morning.
  • Target : We chose the Pub/Sub
  • Topic : Chose the pub/sub topic that we created before
  • Payload : The jeson content about the project databse instance to export and storage target. Find the payload at the end.
    

Payload for Scheduler

{"project": "PROJECT_ID", "database": "DB_INSTANCE_NAME", "bucket": "gs://bucket-names"}

The Function (Updated)

Converting the time-stampt to format DDMMYYYY

const { google } = require('googleapis')
const { auth } = require('google-auth-library')
const sqladmin = google.sqladmin('v1beta4')

/**
 * Triggered from a Pub/Sub topic.
 * 
 * The input must be as follows:
 * {
 *   "project": "PROJECT_ID",
 *   "database": "DATABASE_NAME",
 *   "bucket": "BUCKET_NAME_WITH_OPTIONAL_PATH_WITHOUT_TRAILING_SLASH"
 * }
 *
 * @param {!Object} event Event payload
 * @param {!Object} context Metadata for the event
 */

var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1; 
var yyyy = today.getFullYear();

if(dd<10) 
{
    dd='0'+dd;
} 

if(mm<10) 
{
    mm='0'+mm;
} 

exports.initiateBackup = async (event, context) => {
        const pubsubMessage = JSON.parse(Buffer.from(event.data, 'base64').toString())
        const authRes = await auth.getApplicationDefault()
        const request = {
                auth: authRes.credential,
                project: pubsubMessage['project'],
                instance: pubsubMessage['database'],
                resource: {
                        exportContext: {
                                kind: 'sql#exportContext',
                                fileType: 'SQL',
                                uri: pubsubMessage['bucket'] + '/backup-' +dd+'-'+mm+'-'+yyyy + '.gz'
                        }
                }
        }
        sqladmin.instances.export(request, (err, res) => {
                if (err) console.error(err)
                if (res) console.info(res)
        })
}

package.json
{
        "name": "cloudsql-backups",
        "version": "1.0.0",
        "dependencies": {
                "googleapis": "^45.0.0",
                "google-auth-library": "3.1.2"
        }
}