Microsoft Azure Build and deploy PHP app to Azure Web App: Laravel App - Unable to create lockable file

[AkashPrajapati25]

Hello,

We have a Laravel PHP application and we have deployed with the Build and deploy PHP app to Azure Web App workflow.

we have used nginx.

Sometimes we are facing issues related to permissions please find the below detailed error:

Unable to create lockable file: /home/site/wwwroot/storage/framework/cache/data/5a/0f/5a0fce553c194ec423d77dd06617ff2720c4c5c6. Please ensure you have permission to create files in this location.

so the solution is we need to give the permission and ownership using the below command:
chmod -R 775 /home/site/wwwroot/storage
chown -R www-data:www-data /home/site/wwwroot/storage

but after execution, nothing happened, and I was facing the same problem randomly.

Can anyone help with it?

Thanks

[gainlinejono]

Have you tried adding the commands to the startup command in the app service?

[AkashPrajapati25]

Yes, I have tried that as well but the same problem occurred.

[berga0d]

I think I found the problem.

• /home in App Service is not local, but it's a CIFS mount.
• CIFS often doesn't support flock()
• Laravel use flock() in https://github.com/laravel/framework/blob/11.x/src/Illuminate/Filesystem/LockableFile.php
• LockableFile is used by default in Cache -> FileStore https://github.com/laravel/framework/blob/11.x/src/Illuminate/Cache/FileStore.php
• Referring to the official Laravel Sample, we need to move the Cache File outside /home, (or to use an alternative Cache Store https://github.com/Azure-Samples/laravel-tasks/blob/main/config/cache.php#L54

[gainlinejono]

Hi all,

The fix i used for this was to put the storage folder on mounted storage, you can do this by specifying a storage location via your environment variables.

For example, our mounted storage was available at /app. So we set our APP_STORAGE=/app/storage.

We did the same for the cache files:

APP_PACKAGES_CACHE=/app/cache/packages.php
APP_ROUTES_CACHE=/app/cache/routes.php
APP_SERVICES_CACHE=/app/cache/services.php

Hope this helps.

Thanks

Jonathan