argocd admin dashboard - FATA[0002] cannot find pod with selector: [app.kubernetes.io/name=]

[williammpe]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

When the argocd CLI version was updated to 2.9.0, an error occurred when running the command argocd admin dashboard, whereas it was working fine in version 2.8.6.

To Reproduce

1. Download version 2.9.0 of the argocd CLI using Curl.
   a. curl -sSL -o argocd-linux-amd64 https://github.com/argoproj/argo-cd/releases/download/v2.9.0/argocd-linux-amd64
2. Install the downloaded binary.
   a. sudo install -m 555 argocd-linux-amd64 /usr/local/bin/argocd && rm argocd-linux-amd64
3. run argocd admin dashboard

Result

FATA[0002] cannot find pod with selector: [app.kubernetes.io/name=] - use the --{component}-name flag in this command or set the environmental variable (Refer to https://argo-cd.readthedocs.io/en/stable/user-guide/environment-variables), to change the Argo CD component name in the CLI 

Expected behavior

Argo CD UI is available at http://localhost:8080

Screenshots

Version

argocd: v2.9.0+9cf0c69
  BuildDate: 2023-11-06T05:01:52Z
  GitCommit: 9cf0c69bbe70393db40e5755e34715f30179ee09
  GitTreeState: clean
  GoVersion: go1.21.3
  Compiler: gc
  Platform: linux/amd64

[mikutas]

seems to be related to #14605 , and similar to #16266

https://github.com/argoproj/argo-cd/pull/14605/files#diff-170ef34ea6636f7c5461828e058b61f2e4e53f6f90d761e07be2fa1637d9eaf6L113

argo-cd/cmd/argocd/commands/headless/headless.go

Line 232 in c200d0c

RepoClientset: &forwardRepoClientset{namespace: namespace, context: ctxStr, repoServerName: clientOpts.RepoServerName},

RepoServerName became variable, and empty

[alexmt]

Got the same error. Will work on the fix and cherry-pick into affected versions.