I set up a vault cluster with two vault servers. One server is active and other one is in standby mode at a time as an expected behaivour. I can access each of them from my spring boot application with configuration in bootstrap.properties as shown below:
spring.cloud.vault.authentication=token
spring.cloud.vault.token=xxxxxxxxxxxxxxxxxxx
spring.cloud.vault.scheme=http
spring.cloud.vault.generic.backend=my-config
spring.cloud.vault.host=ip_address_of_one of_the_vault_servers
spring.cloud.vault.port=8200
But if the vault service which is defined in bootstrap.properties is down, I cannot access vault. So it is meaningless to have more than one vault server and using vault in HA mode.
I just want to use two vault server for redundancy in my spring boot application. How can it be possible?
Note: I cannot define host like this: spring.cloud.vault.host= ip_addr1,ip_addr2
Note2: I use postgresql as secret backend in HA mode.
It seeems there is no way to do that with just spring cloud according to this documentation.
The part about that is:
Important: The Spring Cloud Services Config Server supports only one Vault backend, so only one vault object is permitted in the configuration parameters.