Heroku, Grails: Missing resources if using multiple web dynos

Question

I have created grails application and uploaded it in heroku.
If I use \'heroku scale web=1\' everything looks OK. But if I run \'heroku scale web=2\', some

Answer 1

I had similar issues with image files that cannot be directly defined in ApplicationResources.groovy. I found a workaround for this one, though:

Add a CSS file to ApplicationResources.groovy that has multiple class definitions for all the assets you need to load like this:

.asset1 {
  background: url('path/to/image1.png');
}
.asset2 {
  background: url('path/to/image2.png');
}
.asset3 {
  background: url('path/to/image3.png');
}
...

And in ApplicationResources.groovy define the following:

modules = {
    ...
    myModule {
        resource url: 'path/to/assets.css'
    }
    ...
}

Now the Resources plugin has already those paths ready for the images when the module that contains the CSS file is loaded from a GSP view, or if the images are referenced dynamically from JavaScript etc.

Rather hacky but it works. Tested this in Heroku with 2 dynos.