Vault Secret Engine for admin roles

[claesgill]

Refer to section 3 Security point two: fredrikhgrelland/docker-hive#36

[claesgill]

After further investigation and testing we found out that this is a "impossible" task since the terraform-nomad-provider does not support the gateway stanza. This is only supported in Nomad v0.12.4 and terraform-nomad-provider barely supports Nomad v0.12.2. See August 12, 2020 release.

What have been done so far:

• Tested secret engine database with Vault CLI ✔️
• Manually run the ingression example(gateway) as a Nomad job and verified connection ✔️
• Tried to implement database_secret_backend_role resource in .tf-file using the ingression example (unsafe_connection.hcl):x:

We will put this issue on hold for now. Check out branch issue_11_vault_secret for the code.