Ingress controller 1.1.3

[ubergesundheit]

This PR: (Toward giantswarm/roadmap#876)

• Configures controller flag --ingress-class to use configuration value controller.ingressClassResource.name. This enables backwards compatibility with kubernetes.io/ingress.class annotations on Ingresses.
• Adds configuration value ingressClassByName to enable or disable processing IngressClass per name (additionally as per spec.controller) (Default: false).
• Updates controller container image to v1.1.3 to fix CVE-2022-0778 in OpenSSL and CVE-2022-23308 in libxml2. This also upgrades Alpine to 3.14.4 and nginx to 1.19.10.

Tests on workload clusters (not always required)

In order to verify that my changes also work on, I did the following tests:

AWS

• Upgrade from previous version works
• Existing Ingress resources are reconciled correctly (change domain, see if its available)
• Fresh install works
• Fresh Ingress resources are reconciled correctly

Azure

• Upgrade from previous version works
• Existing Ingress resources are reconciled correctly (change domain, see if its available)
• Fresh install works
• Fresh Ingress resources are reconciled correctly

KVM

Hint:

kubectl port-forward -n kube-system svc/nginx-ingress-controller-app 8080:80
curl -H "Host: host.configured.in.ingress" localhost:8080

• Upgrade from previous version works
• Existing Ingress resources are reconciled correctly (change domain, see if its available)
• Fresh install works
• Fresh Ingress resources are reconciled correctly

[weatherhog]

LGTM