Gateway API

[weatherhog]

With the general availability of gateway api as a replacement for ingress api we should evaluate if we can create benefits from migration to gateway api.

Tasks

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1. https://github.com/giantswarm/giantswarm/issues/31314
2. https://github.com/giantswarm/giantswarm/issues/30161
3. Bundle default Gateway CRs and envoy-gateway app together #3640
   epic/gatewayapi team/cabbage +2
   
4. Enable monitoring in envoy-gateway-app #3810
   component/gateway-api epic/gatewayapi team/cabbage +3
5. Evaluate mergedGateways in envoy-gateway #3811
   component/gateway-api epic/gatewayapi team/cabbage +3
6. Install Gateway API in the MCs
7. Migrate MC apps to Gateway API
8. Design a migration plan for customers
9. Canary deployments with Gateway API
10. Gateway API as Kong replacement

[ubergesundheit]

Seems we need to take care of making sure cert-manager and external-dns are upgraded

• external-dns supports Gateway API from 0.14.1 or above
• cert-manager needs to be 1.14 or above (gs app 3.7.5)
• cert-manager needs set extraArgs={--feature-gates=ExperimentalGatewayAPISupport=true}

[weatherhog]

The next step is to bundle the app from the hackathon with our configuration