chore: adding details to readme

Signed-off-by: gkarthiks <[email protected]>

README.md

@@ -2,3 +2,13 @@
 
 ![](go-vault-balancer.png)
 
+*Vault Load Balancer(VLB)* is a simple load balancer written in GoLang to help get HA of the Open Source Vault.
+
+## How does it work
+The VLB is based on round robin mechanism. Collects all the Vault Pod IP addresses by matching the label selector. Adds it to the list of available services.
+
+Using the seal-status API of Vault, determines the availability of the vault pod. If a vault pod is available, and the seal-status of the pod is `unsealed`, then the corresponding pod will be marked alive and made available for queries.
+
+## How to use VLB
+
+To make use of VLB, the vault pods must be already initialized and unsealed. DIY initialization and unsealing or you can also use the [Vault Initializer](https://github.com/gkarthiks/vault-initializer). After doing so, deploy the VLB to achieve the HA of the vault pods.