Use Alpine Image for Docker

[macanudo527]

What? Why?

This replaces the Ubuntu image with a more lightweight image optimized for Ruby, which reduces the size of the images on the computer and simplifies the build. It also eliminates the need to prepend commands with bundle exec and the need for any version manager in the image.

I also added OFN_REDIS_TEST_URL so that tests using SpreePreferences now pass.

Some disadvantages:
When the ruby version is upgraded, the image will need to be updated and rebuilt.
Since Open Food Network uses specific versions of default gems that might not match the Alpine image's default gems, adjustments will need to be made. Currently, OFN's BigDecimal needed to be upgraded to 3.1.1 and the Alpine image's rake and bundler needed to be upgraded to match OFN's.

What should we test?

Build and spin up the docker container:

docker/build

docker/server

Verify that there are no fatal errors.
Visit HTTP://localhost:3000/

This has been tested under Ubuntu, Windows w/WSL, and Windows, but not on Mac

Release notes

Changelog Category (reviewers may add a label for the release notes):

• User facing changes
• API changes (V0, V1, DFC or Webhook)
• Technical changes only
• Feature toggled

The title of the pull request will be included in the release notes.

Dependencies

• Depends on an update to BigDecimal in Fix rounding issues by upgrading decimal maths library #12950

Documentation updates

[rioug]

@macanudo527 there is a failed spec rspec ./spec/lib/reports/sales_tax_totals_by_order_spec.rb:141 that seems related to the BigDecimal upgrade, could you have a look at it ?

[macanudo527]

The last error is a bit strange. It is saving the unit_presentation wrong:

 Spree::Variant Create (1.0ms)  INSERT INTO "spree_variants" ("weight", "product_id", "cost_currency", "unit_value", "display_as", 
"variant_unit", "unit_presentation", "created_at", "updated_at", "shipping_category_id", "primary_taxon_id", "supplier_id") VALUES
 ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12) RETURNING "id"  [["weight", "0.0"], ["product_id", 12], ["cost_currency", "AUD"], 
["unit_value", 0.5001], ["display_as", ""], ["variant_unit", "volume"], ["unit_presentation", "500.09mL"], ["created_at", "2024-10-15 
23:48:04.298869"], ["updated_at", "2024-10-15 23:48:04.298869"], ["shipping_category_id", 1], ["primary_taxon_id", 5], 
["supplier_id", 3]]
08:48:04 rails.1   |   ↳ app/models/spree/product.rb:261:in `ensure_standard_variant'

[rioug]

@macanudo527 the last Product Refactor PR has been merged , you'll probably need to rebase your branch

[macanudo527]

@sigmundpetersen Did you make an accidental update?

[sigmundpetersen]

Hi @macanudo527 I just rebased your branch.
The build error may be due to the recent merge of #12787 .
I can also try rebuild a few times to see if it's a flaky error

[macanudo527]

Hi @macanudo527 I just rebased your branch.
The build error may be due to the recent merge of #12787 .
I can also try rebuild a few times to see if it's a flaky error

OK, that's kind of strange the compare looked like it was strangely incomplete, but maybe the tests are just flakey. Thanks!

[sigmundpetersen]

Rebuild was green so I'm moving this to Code Review again 👍

[mkllnk]

Nice work!

I'm not quite sure on the way forward though.

[macanudo527]

@mkllnk I revised it so that you can optionally build it with the Alpine image by adding it to the build script.
There is a significant difference in build time and size:
Alpine:
2m6.737s
Ubuntu:
7m52.583s

[rioug]

Looks gone now ! But I think we should wait for #12950 before merging this has there are still some BigDecimal related changes in this PR.

If you are keen to play with Docker, it would be nice to dockerise OFN, ie have a separate Image for the OFN code, and each dependency (Postgres, Redis etc...) It would be a good start to moving toward a Docker based deployment, especially now that Kamal exists

[dacook]

I took a look so I could keep up to date with what's happening. I have a few queries.

[dacook]

I'm wondering if it's possible to inherit the timezone from the host? That seems like the most intuitive for the developer.
(Also note that London is not always the same as GMT/UTC due to daylight savings)

[dacook]

These commands look much the same between Linux and Windows, we should consider combining the sections in the future.

[dacook]

Should we add a note here that the Alpine image will need updating when we change the Ruby version in the future?

And I think it's safe to say, we don't have the resources to officially support both Ubuntu and Alpine, so we would not necessarily be supporting Alpine.

[dacook]

Testing on Mac

I just tried building the default Ubuntu, and it failed after filling up my hard drive 😞 .

So after some cleanup and a system restart I tried the Alpine image. I now have more disk space (?! maybe because docker cleaned up the failed ubuntu image?). But it failed:

time docker/build alpine.Dockerfile
...
bundler: failed to load command: rake (/bundles/ruby/3.1.0/bin/rake)
/usr/local/src/rbenv/versions/3.1.4/lib/ruby/gems/3.1.0/gems/bundler-2.4.3/lib/bundler/definition.rb:526:in `materialize': Could not find bigdecimal-3.1.8 in locally installed gems (Bundler::GemNotFound)
...
real	8m27.699s

Maybe that's because #12950 hasn't been merged yet. I've marked as blocked and set to 'In Progress' until that's merged, then we can rebase and try again.

[macanudo527]

Maybe that's because #12950 hasn't been merged yet. I've marked as blocked and set to 'In Progress' until that's merged, then we can rebase and try again.

This is the exact reason. We need to wait for that PR to pass and then I can rebase this with it and the error should go away.