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Heys dudes,

More someone got error when trying update cache of the Google K8s repositories? I have been got the error about NO_PUBKEY

Err:10 https://packages.cloud.google.com/apt kubernetes-xenial InRelease        
  The following signatures were invalid: EXPKEYSIG 6A030B21BA07F4FB Google Cloud Packages Automatic Signing Key <gc-team@google.com> The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B57C5C2836F4BEB

and

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.cloud.google.com/apt kubernetes-xenial InRelease: The following signatures were invalid: EXPKEYSIG 6A030B21BA07F4FB Google Cloud Packages Automatic Signing Key <gc-team@google.com> The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B57C5C2836F4BEB
W: Failed to fetch http://apt.kubernetes.io/dists/kubernetes-xenial/InRelease  The following signatures were invalid: EXPKEYSIG 6A030B21BA07F4FB Google Cloud Packages Automatic Signing Key <gc-team@google.com> The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B57C5C2836F4BEB
W: Some index files failed to download. They have been ignored, or old ones used instead.

Something was changed?

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As per compute/docs/troubleshooting/known-issues:

On Debian and Ubuntu based systems, including your local workstations, you might encounter an error similar to the following example: [...] The following signatures were invalid: XXXX [...]

To resolve this error, get the latest valid apt-key.gpg key file from https://packages.cloud.google.com by running the following command:

curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
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  • My doubt was this if the key was changed or something more deep. Valeu Du. – Weyder Ferreira Apr 5 at 13:13

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