Upgrade to Helm 3

[r0mant]

Helm 3 is out: https://helm.sh/blog/helm-3-released/.

We should see what it'd take to upgrade to it, in particular:

• Revendor Helm 3 and update our integration with it in regards to Application Catalog functionality.
• Get rid of tiller-app, just ship the new helm binary in planet.

Once we're upgraded, we should work on iteratively migrating all our system apps to use Helm instead of plain K8s specs.

[helgi]

One thing to note here is the chart apiVersion aspect, which makes charts working on v2 not work on v3. Even latest 2.x exhibit that.

way to test it is grab a chart and run helm lint against it, ideally in strict mode

[dirien]

Hi, some thumbs up from the Schwarz Group. Looking forward to get Helm 3 support. 💯

[dorsany]

maybe as an intermediate step, you can add additional flag like --helm3 to the gravity app install and to tele build? In that way you still support helm2 as a default, and provide the ability to use helm3 and to skip the local tiller

Helm v2 and v3 can quite happily manage the same cluster. The Helm versions can be installed on the same or separate systems

from: https://helm.sh/docs/topics/v2_v3_migration/

[yonatankahana]

any updates about that? helm 2 is end-of-life and some charts are becoming not available to use in gravity, for example, it is enough that chart will use deepCopy in the template to be incompatible with gravity.