How to run Google Cloud SQL only when I need it?

问题

Google Cloud SQL advertises that it's only $0.0150 per hour for the smallest machine type, and I'm being charged for every hour, not just hours that I'm connected. Is this because I'm using a pool? How do I setup my backend so that it queries the cloud db only when needed so I don't get charged for every hour of the day?

const mysql      = require('mysql');
const pool = mysql.createPool({
    host : process.env.SQL_IP,
    user     : 'root',
    password : process.env.SQL_PASS,
    database : 'mydb',
    ssl      : {
          [redacted]
    }
});

function query(queryStatement, cB){
  pool.getConnection(function(err, connection) {
    // Use the connection
    connection.query(queryStatement, function (error, results, fields) {
      // And done with the connection.
      connection.destroy();
      // Callback
      cB(error,results,fields);

    });
  });
}

回答1:

This is not so much about the pool as it is about the nature of Cloud SQL. Unlike App Engine, Cloud SQL instances are always up. I learned this the hard way one Saturday morning when I'd been away from the project for a week. :)

There's no way to spin them down when they're not being used, unless you explicitly go stop the service.

There's no way to schedule a service stop, at least within the GCP SDK. You could alway write a cron job, or something like that, that runs a little gcloud sql instances patch [INSTANCE_NAME] --activation-policy NEVER command at, for example, 6pm local time, M-F. I was too lazy to do that, so I just set a calendar reminder for myself to shut down my instance at the end of my workday.

Here's the MySQL Instance start/stop/restart page for the current SDK's docs: https://cloud.google.com/sql/docs/mysql/start-stop-restart-instance

On an additional note, there is an ongoing 'Feature Request' in the GCP Platform to start/stop the Cloud SQL (2nd Gen), according to the traffic as well. You can also visit the link and provide your valuable suggestions/comments there as well.

来源：https://stackoverflow.com/questions/49547016/how-to-run-google-cloud-sql-only-when-i-need-it