![]() Use the JWT token for a pod’s service account to authenticate with Vault.This service account can then be used to make authenticated calls to Kubernetes to verify tokens of the service accounts of pods that want to connect to Vault to get secrets. Vault is configured with a service account that has permissions to access the TokenReview API. The token for a pod’s service account is automatically mounted within a pod at /var/run/secrets/kubernetes.io/serviceaccount/token and is sent to Vault for authentication. The Kubernetes authentication method can be used to authenticate with Vault using a Kubernetes Service Account Token. Additionally, no OpenShift cluster admin can see the credentials, plus in Vault you can create sharded master keys so that no Vault admin can, by themselves, un-encrypt the credentials. Vault can run in the cloud and also encrypts credentials at rest. Vault can manage static and dynamic secrets such as username/password and manage credentials for external services such as MySQL, PostgreSQL, Apache Cassandra, MongoDB, Consul, AWS and more. With Vault you have a central place to manage external secret properties for your applications across all environments. Vault is a secret store software created by HashiCorp. ![]() It makes use of Spring Cloud Vault Config that supports this method out of the box. Finally, we demonstrate running a Spring Boot application client on OpenShift that connects to Vault using the Kubernetes Auth Method to retrieve secrets. We then configure Vault to use the Kubernetes Auth Method that can be used by client applications to authenticate with Vault. This is made possible using by using the Kubernetes authentication method that has been added (since Vault 0.8.3), to integrate Vault directly with Kubernetes.Īdditionally, in this blog post, we demonstrate how to run Vault on OpenShift. In this post, we demonstrate a simpler approach for applications to authenticate with Vault, in a way more native to Kubernetes. It involved a complex orchestration workflow, involving multiple actors (including a Vault Controller and init container as outlined in this post) in order to retrieve secrets stored in Vault. Until recently, it wasn't straightforward for applications running on OpenShift to authenticate with Vault in order to retrieve secrets.
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