Multiple Hashicorp Vault servers in different AZs in AWS

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I have 3 Availability Zones in my AWS VPC and I would like to run Vault to connect to S3. I would like to run 3 Vault servers (one for each zone) all of them syncing to the same S3 bucket. Is this HA scenario for Vault possible?

I read that Vault doesn't support HA using S3 as the backend and might need to use Consul (which runs 3 servers by default). A bit confused about this. All I want is to run multiple Vault servers all storing/reading secrets from the same S3 bucket.​
Sep 6, 2018 in AWS by bug_seeker
• 15,520 points

1 answer to this question.

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There are several Storage Backends in Vault, and only some of them supports HA, like Consul. However, if a backend doesn't support HA it doesn't mean that it can't be used at all.

So, if you need to run multiple Vault istance, each one independent from the other ones, you should be able to use S3 as a Storage Backend. But if you need HA you need to use Consul, or any other backend that support HA.

Hope this help
answered Sep 6, 2018 by Priyaj
• 58,090 points

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