All,
I have all my secrets stored in vault. How can I fetch secrets from vault and inject them in pods.
Do I have to use a sidecard for it or there is some easiest way also .
The sidecar pattern is common with Kubernetes applications and can be applied to access secrets from Vault.
There is a great step by step walk through on hands-on-with-vault-on-kubernetes on git hub. This will answer all your basic questions on how to do this with example.
One more for your reference Injecting Vault Secrets Into Kubernetes Pods via a Sidecar
There is one great project on Github Vault-CRD in java: https://github.com/DaspawnW/vault-crd
Vault CRD for sharing Vault Secrets with Kubernetes. It injects & sync values from Vault to Kubernetes secret. You can use these secrets as environment variables inside pod.