[installer]: add validate cluster command to the installer

[mrsimonemms]

Description

Runs validation checks against the cluster

• kernel >= 5.4.0-0
• containerd used as runtime
• cert-manager installed
• affinity labels applied to nodes

Related Issue(s)

Fixes #6210

How to test

With the appropriate config in ~/.kube/config (or specifying your own with --kubeconfig= or KUBECONFIG envvar), run go run . validate cluster

Release Notes

Validate the cluster is in a state for Gitpod to be installed to

Documentation

[aledbf]

Testing this against a GKE cluster I get an error in "Kernel version" -> "message": "Invalid Semantic Version"

[mrsimonemms]

Testing this against a GKE cluster I get an error in "Kernel version" -> "message": "Invalid Semantic Version"

@aledbf That's strange. What version comes out when you run kubectl get node -o wide. I've tried against 5.4.0-1049-gke on GKE and 5.11.0-37-generic on Kind and both validate.

I've also added in the detected Kernel version into the error message.

[codecov]

Codecov Report

Merging #6234 (b06be37) into main (79865e2) will decrease coverage by 12.95%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #6234       +/-   ##
==========================================
- Coverage   19.04%   6.08%   -12.96%     
==========================================
  Files           2      10        +8     
  Lines         168     854      +686     
==========================================
+ Hits           32      52       +20     
- Misses        134     800      +666     
  Partials        2       2               

Flag	Coverage Δ
components-local-app-app-linux-amd64	?
components-local-app-app-linux-arm64	?
components-local-app-app-windows-386	?
components-local-app-app-windows-amd64	?
components-local-app-app-windows-arm64	?
installer-app	6.08% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
installer/pkg/common/common.go	1.34% <ø> (ø)
components/local-app/pkg/auth/pkce.go
components/local-app/pkg/auth/auth.go
installer/pkg/components/ws-manager/tlssecret.go	0.00% <0.00%> (ø)
...staller/pkg/components/ws-manager/networkpolicy.go	0.00% <0.00%> (ø)
...components/ws-manager/unpriviledged-rolebinding.go	0.00% <0.00%> (ø)
installer/pkg/common/render.go	30.30% <0.00%> (ø)
installer/pkg/components/ws-manager/configmap.go	23.45% <0.00%> (ø)
installer/pkg/components/ws-manager/rolebinding.go	0.00% <0.00%> (ø)
... and 3 more

---

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[aledbf]

kubectl get node -o wide

Some nodes (Container-Optimized OS from Google) return 5.4.120+

[aledbf]

/approve

[mrsimonemms]

/assign @csweichel

[mrsimonemms]

@aledbf Hmmm, the 5.4.120+ doesn't render as a valid semantic version in the package I've got. I've rewritten the error message so it renders as a warning and let the user decide.

[csweichel]

/lgtm

[roboquat]

LGTM label has been added.

Git tree hash: bc87b63d1b0fcfa7a2fa88e84cba12e8ec3133fd

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, csweichel

Associated issue: #6210

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• installer/OWNERS [aledbf,csweichel]

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