bug: portion of the file is locked

[githubcdr]

Describe the issue

kubelogin does not seem to work after upgrading to 1.30.0

error: get-token: could not write the token cache: json encode error: write C:\Users.....e\oidc-login\f47b8beecda810bf915550407dd07d603106a87cb9c80a227d0c935ee5ad0c38: The process cannot access the file because another process has locked a portion of the file.

Deleting the file did not solve this

To reproduce

update to version 1.30.0, try to login

Your environment

• OS: Win11
• kubelogin version: e.g. v1.30
• kubectl version: e.g. v1.31.0
• OpenID Connect provider: custom

[TobiKattmann]

I have exactly the same problem with kubelogin 1.30.0 and reverting to 1.29.0 is a temporary workaround for me (i.e. 1.29.0 from the releases works) 👍

PS <user>> kubectl get nodes
error: get-token: could not write the token cache: json encode error: write C:\Users\<user>\.kube\cache\oidc-login\02e4d5d5d03a8d8ad9f22f2be05cdbca8ee82bd473efca0fd197580bac823c06: The process cannot access the file because another process has locked a portion of the file.
Error: exit status 1

For what it is worth I am also on Win11.

[githubcdr]

kubectl-oidc_login.exe get-token --oidc-issuer-url=https://om.......rl/oidc --oidc-client-id=native --oidc-extra-scope=cluster:silnet -v 99 --token-cache-dir D:\

I0923 13:43:40.996959   12784 get_token.go:127] you got a valid token until 2024-09-24 01:48:40 +0200 CEST
I0923 13:43:40.997468   12784 get_token.go:73] releasing the lock of token cache
error: get-token: could not write the token cache: json encode error: write D:\f47b8beecda810bf915550407dd07d603106a87cb9c80a227d0c935ee5ad0c38: The process cannot access the file because another process has locked a portion of the file.
I0923 13:43:40.997468   12784 cmd.go:76] stacktrace: get-token: could not write the token cache: json encode error: write D:\f47b8beecda810bf915550407dd07d603106a87cb9c80a227d0c935ee5ad0c38: The process cannot access the file because another process has locked a portion of the
file.

[a-hulman]

I confirm, kubelogin will fail to write/read the cache with my Windows 11 in current version(1.30). Also fixed with downgrading to 1.29.

[int128]

Since 1.30 (#1126), it locks the cache file using https://github.com/gofrs/flock. Not working expectedly on Windows?

[int128]

I could reproduce this issue in CI as #1146. I will try to fix it.

[int128]

Thank you for bringing up the issue. Could you try the new release?
https://github.com/int128/kubelogin/releases/tag/v1.30.1

[jynolen]

I confirmed it fixed the issue on my side

[TobiKattmann]

Big thanks @int128 -> v1.30.1 fixes the issue for me!
💐 Take this as a token of appreciation for you super fast response and solution, very much appreciated :)