Upgrade controller runtime 0.8.3 and K8s 1.20

[cheyang]

Ⅰ. Describe what this PR does

1. Upgrade K8s to 1.20.10
2. Upgrade controller-runtime to 0.8.3 and controller-gen to 0.7.0, and adopt the breaking change of them
   • The interface for client.Get, Client.Create, Clident.Update is changed from runtime.Object to client.Object
   • The parameter of function Reconcile is changed from req ctrl.Request to ctx context.Context, req ctrl.Request
   • some test function is deprecated.
3. Upgrade API version
   • CustomResourceDefinition from apiextensions.k8s.io/vebeta1 to apiextensions.k8s.io/v1
   • CSIDriver from storage.k8s.io/v1beta1 to storage.k8s.io/v1
   • MutatingWebhookConfiguration from admissionregistration.k8s.io/v1beta1 to admissionregistration.k8s.io/v1

Ⅱ. Does this pull request fix one issue?

fixes #1208

Ⅲ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #1207 (8312dc8) into master (2c78e52) will increase coverage by 0.39%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master    #1207      +/-   ##
==========================================
+ Coverage   66.30%   66.69%   +0.39%     
==========================================
  Files         207      207              
  Lines       11152    11156       +4     
==========================================
+ Hits         7394     7441      +47     
+ Misses       2964     2916      -48     
- Partials      794      799       +5     

Impacted Files	Coverage Δ
pkg/utils/kubeclient/metadata.go	77.77% <ø> (ø)
pkg/utils/dataset/lifecycle/schedule.go	62.60% <80.00%> (+37.39%)	⬆️
pkg/webhook/certificate_builder.go	60.97% <100.00%> (ø)

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[zwwhdls]

apiextensions.k8s.io/v1 is supported since v1.16, what about k8s v1.14/v1.15 ?

[allenhaozi]

Can we not use Kubernetes pkg directly ?

[allenhaozi]

#958

[cheyang]

I'm using bash k8s-mod.sh v1.20.10 to upgrade K8s version. This script is from K8s and using the exact same version in K8s repo.

[cheyang]

Now it's fixed. See the latest commit.

[allenhaozi]

awesome !
Because if Fluid uses the kubernetes package directly, a project that references Fluid must also maintain replace in go.mod,
This is not an official recommended approach, kubernetes/kubernetes#90358 (comment)

[cheyang]

I was using same useful library, and I am afraid it's Inevitable.

I was using the solution in kubernetes/kubernetes#79384. It works as a charm.

[allenhaozi]

OK, I got it

[xieydd]

Can you describe the impact of the version update and why it was updated in issue #1208 ?

[cheyang]

Can you describe the impact of the version update and why it was updated in issue #1208 ?

The purpose is to match K8s 1.22. As you know a lot of APIs are removed since 1.22, including CSI, CRD, webhook. We have to upgrade the K8s version, and during the upgrade we found the controller-runtime has to be upgraded also.

[xieydd]

For User, if your kubernetes version under 1.16.0, can only use fluid berfore this pr, right?
And i notice we update k8s to 1.20.10, not 1.22.

[cheyang]

For User, if your kubernetes version under 1.16.0, can only use fluid berfore this pr, right? And i notice we update k8s to 1.20.10, not 1.22.

It can support the K8s version whose version >= 1.16. Actually, K8s 1.14's EOL date is 2019-12-11, about 2 years ago. But I plan to provide limited support in helm chart, for example in the version 1.14, we can install CRD with v1beta1, while webhook is not supported.

https://kubernetes.io/releases/patch-releases/#non-active-branch-history

[allenhaozi]

LGTM

[cheyang]

LGTM

thanks.

[zwwhdls]

LGTM