Add OpenFunction Katacoda scenario about openfunction

[x893675]

@FeynmanZhou, @tpiperatgod

this openfunction scenarious can work now.

Issue:

Version incompatibility

katacoda k8s version is v1.18.0
openfunction latest version need k8s version >= v1.19.0
knative (deploy.sh installed) need k8s >= v1.20.0
nginx-ingress (deploy.sh installed) install failed when k8s version is v1.19.0 ingress-nginx#7810

workaround:

1. upgrade k8s version to v1.19.0 when katacoda k8s env runtime start
2. only install cert-manager, Shipwright builder, OpenFuncAsync serving runtime

please create repo katacoda-scenarios in org OpenFunction, i will create a PR

[x893675]

/assign @x893675

[FeynmanZhou]

/assign @x893675

Hi @x893675 ,

Thanks for your interest! We could collaborate with you to finish it. The previous Katacoda scenarios were developed and contributed by @AbdelouahabMbarki, he could also help out with this feature.

[benjaminhuo]

@x893675 You can create a PR in the samples repo

[benjaminhuo]

Thanks for the contribution! @x893675

[FeynmanZhou]

@FeynmanZhou, @tpiperatgod

this openfunction scenarious can work now.

Issue:

Version incompatibility

katacoda k8s version is v1.18.0
openfunction latest version need k8s version >= v1.19.0
knative (deploy.sh installed) need k8s >= v1.20.0
nginx-ingress (deploy.sh installed) install failed when k8s version is v1.19.0 ingress-nginx#7810

workaround:

1. upgrade k8s version to v1.19.0 when katacoda k8s env runtime start
2. only install cert-manager, Shipwright builder, OpenFuncAsync serving runtime

please create repo katacoda-scenarios in org OpenFunction, i will create a PR

Awesome, thanks for your contribution! Could you create a new folder in the Sample repo. I will create a Katacoda URL with katacoda.com/openfunction later.

I noticed the issues of version incompatibility caused by the built-in Kubernetes version in Katacoda, but I am curious why the Knative scenario can be used with Kubernetes 1.18.

IMO, the workaround should be added to the step-by-step guide of Katacoda scenario if we don't have a better solution so far.

[x893675]

Knative scenario use Knative v0.18.0, but OpenFunction deploy.sh use Knative v0.26.0.

Knative require Kubernetes 1.20 since v0.25.0

The highest k8s version that katacoda can be upgraded through apt-install is v1.19.4. I think we can manually upgrade k8s to a newer version(1.20, 1.21... etc)

I will move the upgrade operation to step and create pr to Sample repo later

[tpiperatgod]

Close this issue since the OpenFunction Katacode scenarios works now.