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# Automatic Updates | ||
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Lagoon deploys applications in a way that is not compatible with some methods of | ||
updating Drupal core and contrib. Lagoon expects to build immutable images and | ||
run immutable containers. When the code of the application is changed at | ||
runtime, it can cause any of the following problems: | ||
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1. Containers are managed automatically by Kubernetes and may be moved, | ||
restarted, or scaled at any time. When this happens, the original built | ||
container image will be ran and any changes that happened at runtime are | ||
lost. | ||
2. Tasks and cronjobs may run with the orignal built container image and won't | ||
have access to any updated code. | ||
3. Updating requires write permissions to the filesystem, but it is possible to | ||
configure an environment that forces a read-only filesystem. | ||
4. Best practices is to deploy small containers that each do one thing. For a | ||
typical Drupal project this means there is a `cli`, `php`, and `nginx` | ||
container which each contain a copy of the code. Updating only one of these | ||
containers will cause issues with code mismatches. | ||
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The following update methods been disabled by Lagoon. | ||
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### Drupal Automatic Updates | ||
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The [Automatic Updates](https://www.drupal.org/project/automatic_updates) | ||
contrib module is disabled by and it will also be disabled when it moves | ||
into Drupal core. | ||
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### Drush | ||
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Using `drush pm-install` or `drush pm-update` is disabled by default as part of | ||
the [amazeeio/drupal-integrations](https://github.com/amazeeio/drupal-integrations) | ||
package. |
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