Automatically initialize Vault

[locmai]

From provisioning flow, after Vault installation, we will need to initialize Vault with root token, shared keys and unseal it. Then enable Kubernetes authentication and feed the initial secret set into Vault.

Write a script that:

• Initialize Vault with root token and shared keys
• Unseal Vault with the generated root token and shared keys
• Enable Kubernetes authentication
• Feed secrets into Vault

Refs:

• hvac Vault client
• kubernetes kubernetes client