HashiCorp Vault provider for keycloak

• Create a jar with mvn package
• Copy the jar to $KEYCLOAK_HOME/standalone/deployments
• Add configuration in standalone(-ha).xml

<spi name="vault">
    <default-provider>hachicorp-vault</default-provider>
    <provider name="hachicorp-vault" enabled="true">
        <properties>
            <property name="token" value="token"/>
            <property name="url" value="https://vault-url/"/>
            <property name="engine-name" value="secret"/>
        </properties>
    </provider>
</spi>

To choose the K/V2 key version to use in keycloak, add :your_version to the key label (example : ${vault.ldap:3}). By default, the last version will be used.