How to: Use Vault as an intermediate CA

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Use Vault as an intermediate CA

In this how-to guide, we will configure Vault to act as an intermediate Certificate Authority (CA) using Vault’s PKI secrets engine. Here self-signed-certificates will be the parent CA and tls-certificates-requirer will be the charm requesting a certificate to Vault.

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  1. Configure Vault’s common name
juju config vault common_name=mydomain.com
  1. Deploy the parent CA
juju deploy self-signed-certificates
  1. Integrate Vault with its parent CA
juju integrate vault:tls-certificates-pki self-signed-certificates
  1. Deploy tls-certificates-requirer
juju deploy tls-certificates-requirer --config common_name=demo.mydomain.com
  1. Integrate TLS Certificates Requirer with Vault
juju integrate tls-certificates-requirer vault:vault-pki
  1. Retrieve the certificate
juju run tls-certificates-requirer/leader get-certificate