I downloaded Kubernetes for integration with Jenkins and created a Serviceaccount, but the secret is not automatically created.
In the past, I remember that a Secret was automatically created and the Token was mounted when Serviceaccount was created.
How can I automatically create a Secret as before?
As mentioned by @P.... In kubernetes version 1.24 this behaviour has been changed, the LegacyServiceAccountTokenNoAutoGeneration feature gate is enabled by default in 1.24.
New secrets containing service account tokens are no longer auto-generated and are not automatically ambient in secrets in 1.24+. Existing secrets containing service account tokens are still usable.
API clients scraping token content from auto-generated Secret API objects must start using the TokenRequest API to obtain a token (preferred, available in all supported versions), or you can explicitly request a secret-based token if a secret-based token is desired/needed.
Refer manually create a service account API token to explicitly request a secret-based token.