feat: add wasm filter-chain entity support

[hishamhm]

This brings support for wasm filter chains to deck.

Most of the groundwork for this was laid in the other repos:

• feat: WebAssembly filter chains go-kong#362
• feat: add wasm filter-chain entity support go-database-reconciler#72

Wasm filters were added in 3.4 and are an optional feature. Feature detection in deck works by fetching the root admin API endpoint and inspecting the configuration to see if wasm is enabled (this works for versions <3.4 and versions >=3.4 with wasm disabled). Feature detection does not run in Konnect mode; therefore Konnect is not yet supported, only Kong gateway OSS/EE EDIT: Feature detection works by calling GET /filter-chains and inspecting the response code (link).

For the sake of keeping things reasonable in size (we're at >3k new lines of code if you include the other 2 PRs), there are some validation steps that have been left out:

• validating filter chain names against those that the admin API tells us are installed/available
• validating filter configurations against the JSON schema from the admin API

These things are of course still validated by the Kong admin API, but at a later date it will be possible to validate them client-side for better UX.

---

KAG-4005
KOKO-1275

[CLAassistant]

All committers have signed the CLA.

[flrgh]

See also: Kong/go-database-reconciler#72

[flrgh]

Kong/go-database-reconciler#72 has been merged. Awaiting the merge of Kong/go-database-reconciler#90 and for a new release of go-database-reconciler now.

Edit: both of these are done.

[flrgh]

re: CI Test / test (pull_request) Failing after 4m, this is due to us getting ratelimited by Codecov:

[2024-05-21T16:04:17.142Z] ['error'] There was an error running the uploader: Error uploading to https://codecov.io: Error: There was an error fetching the storage URL during POST: 429 - {'detail': ErrorDetail(string='Rate limit reached. Please upload with the Codecov repository upload token to resolve issue. Expected time to availability: 2452s.', code='throttled')}
Error: Codecov: Failed to properly upload: The process '/home/runner/work/_actions/codecov/codecov-action/v3/dist/codecov' failed with exit code 255

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 22.39%. Comparing base (526baa3) to head (f3b6505).

Files	Patch %	Lines
cmd/gateway_validate.go	0.00%	2 Missing ⚠️
validate/validate.go	0.00%	2 Missing ⚠️
cmd/common.go	0.00%	1 Missing ⚠️
tests/integration/test_utils.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #987      +/-   ##
==========================================
- Coverage   22.49%   22.39%   -0.10%     
==========================================
  Files          54       54              
  Lines        4508     4514       +6     
==========================================
- Hits         1014     1011       -3     
- Misses       3395     3403       +8     
- Partials       99      100       +1     

☔ View full report in Codecov by Sentry.
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[flrgh]

👋 @GGabriele do you think you could review or help source a reviewer for this PR?

[GGabriele]

Can we please add some integration tests too?

[flrgh]

Okay, found another wart in testing. PR for fixage his here:
Kong/go-database-reconciler#103

[flrgh]

Okay, Kong/go-database-reconciler#101 has been merged, but we're blocked on getting a version bump.

I've also submitted a semi-related bugfix PR to gdr (link). I think it would be wise to merge this before the version bump so that it is included with filter chain support from the get-go.

[flrgh]

@GGabriele sorry for the turnaround time. This is ready for another round of review. Let me know what you think of the integration tests--anything else that you think would particularly benefit from more coverage?

[GGabriele]

@flrgh a new version of go-database-reconciler has been released now.

[flrgh]

@flrgh a new version of go-database-reconciler has been released now.

@GGabriele Awesome! Bumped and added test coverage.