https://kubernetes.io/docs/concepts/configuration/secret/

2022
https://auth0.com/blog/kubernetes-secrets-management/
https://habr.com/ru/company/southbridge/blog/658123/
2019
https://learnk8s.io/kubernetes-secrets-in-git
2018
https://www.ibm.com/developerworks/cloud/library/cl-kubernetes-secrets-manage-credentials/index.html

https://habrahabr.ru/company/southbridge/blog/336118/