It is also extremely extensible, in that you can create your own custom commands. Some useful commands include – SQL commands, exporting or importing configurations, updates, migrations, cron or clear cache, and much more. It helps you streamline your development and administrative tasks thus improving your productivity.ĭrush 9 and Drush 10 core comes shipped with tons of helpful commands that helps you interact with themes, modules, profiles, etc. With Drush, you can set up new Drupal websites quickly and easily work with the Drupal installations. Short for “Drupal + Shell”, Drush is a Command Line Interface (CLI) tool made exclusively for Drupal. But if you’re just starting out as a Drupal developer or keen on learning about Drupal, you should know that Drush is something you just CANNOT ignore. CronJob Pods should be as lightweight as possible so they could be scheduled on any system node and run very quickly (even if your Drupal container hasn't been pulled on that particular Kubernetes node yet).ĭrupal's cron supports being run from outside the site by hitting a URL, and as long as your cron runs can complete before PHP/Apache/Nginx's timeout, this is the simplest option for working with Kubernetes (IMO).If you’re a Drupal professional, Drush needs no introduction. The most robust way to run Drupal cron is via Drush, but running a separate Drush container via CronJob means that the CronJob must schedule a beefy container running at least PHP and Drush, and likely also your app codebase if you run Drush as a project dependency. And while you could have an external system like Jenkins run cron jobs against your Drupal site, it's much easier (and simpler) to just run Drupal cron as a Kubernetes CronJob, ideally within the same Kubernetes namespace as your Drupal site. Inside of Kubernetes, you can't (well, at least you shouldn't) have a crontab set up on any of your Kubernetes nodes running against your Drupal site(s). The reason you want to run cron via an external process-instead of having it be triggered by front-end page visits (this is how Drupal sets up cron by default, to run every few hours based on someone hitting the site)-is so you can make sure cron job runs don't interfere with any normal page visits, and so you can trace any issues with cron separately from normal web traffic. And if your site is especially reliant on timely cron runs, you probably also use something like Ultimate Cron to manage the cron jobs more efficiently (it makes Drupal cron work much like the extensive job scheduler in a more complicated system like Magento). Drupal's cron is essential to many site operations, like cleaning up old files, cleaning out certain system tables (flood, history, logs, etc.), running queued jobs, etc. PV/PVC over networked file share) for the files directory (which can contain generated files like image derivatives, generated PHP, and twig template caches), and setting up containers to use environment variables for connection details (instead of hard-coding things in settings.php).īut another thing which you should do for better performance and traceability is run Drupal cron via an external process. There are a number of things you have to do to make Drupal a first-class citizen inside a Kubernetes cluster, like adding a shared filesystem (e.g.
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