Carvel package support in Kubeapps

[absoludity]

Description:

We're currently working on plugin-based support for different packaging systems, moving across our existing Helm support as well as adding fluxv2 support.

We included Carvel support in the original POC, but due to it changing constantly at the time, as well as a higher priority for flux support, we paused the carvel work to focus on flux and porting the existing helm support to a plugin.

We'd love to come back and add a Carvel/kapp-controller plugin once other priorities are completed (especially as it's now stable).

[antgamdia]

Just adding a list to track the remaining operations:

• List available packages
  • GetAvailablePackageSummaries: kapp-controller plugin metadata #3728 and Add 'GetAvailablePackageSummaries' impl #3784
  • GetAvailablePackageDetail: Add implementation for GetAvailablePackageDetail for kapp-controller. #3735 and Add 'GetAvailablePackageDetail' impl #3786
  • GetAvailablePackageVersions: Add implementation of GetAvailablePackageVersions for kapp-controller. #3734 and Add 'GetAvailablePackageVersions' impl #3785
• List installed packages
  • [x GetInstalledPackageSummaries: https://github.com/Add 'GetInstalledPackageSummaries' impl #3787
  • GetInstalledPackageDetail: Add 'GetInstalledPackageDetail' impl #3788
• Action "buttons"
  • CreateInstalledPackage: Add 'CreateInstalledPackage' impl #3789
  • UpdateInstalledPackage: Add 'UpdateInstalledPackage' impl #3790
  • DeleteInstalledPackage: Add 'DeleteInstalledPackage' impl #3791
• old GetPackageRepositories: Add 'GetPackageRepositories' impl #3792

Additionally, we should be fixing some minor UI issues and features we encounter (e.g., icons, filtering by package plugin, etc...) [will update this comment to track them]

• Add Carvel/Flux icons: Tidy up the used icons. Add new pkg icons #3747
• Clean-up the code: Add required files for the Carvel plugin impl #3783

Currently working on: implementing tests (nov 22th)

Tests done so far:

• 'GetPackageRepositories'
• 'DeleteInstalledPackage'
• 'UpdateInstalledPackage'
• 'CreateInstalledPackage'
• 'GetInstalledPackageDetail'
• 'GetInstalledPackageSummaries'
• 'GetAvailablePackageDetail'
• 'GetAvailablePackageVersions'
• 'GetAvailablePackageSummaries'

Old videos

createCarvelUI.mp4

carvelInstalled.mp4

[antgamdia]

I've created a bunch of PRs aimed at having initial Carvel support. However, the final result is far from being seamless and smooth.

carvelDemo.mp4

For instance, just in this demo I'd remark a couple of issues:

• The UI redirects when not every resource is created. Currently, we are throwing errors when sth is not found. Not the best UX
• The loading times for the catalog are way too long... I'd foresee we're gonna need a cache (even if I tried using goroutines... it seems it's not enough)
  • Especially if you add the Bitnami repo as Carvel packages...
• The demo package gets installed, but I' haven't been able to get to work another pkg but this one. I mean, not having a default values.yaml file hinders quicks 1-click deployments.
• There is plenty of to-do and questions in the code. But I think we can start merging soon and start to have quick iterations for improving it.
• I haven't checked the support for multiple namespaces yet.
  • Also, the "all namespaces" functionality remains unimplemented.
• I haven't checked the support for multiple clusters yet.