mirror of https://github.com/status-im/consul.git
89 lines
3.4 KiB
Markdown
89 lines
3.4 KiB
Markdown
---
|
|
layout: "docs"
|
|
page_title: "Connect - Certificate Management"
|
|
sidebar_current: "docs-connect-ca-vault"
|
|
description: |-
|
|
Consul can be used with Vault to manage and sign certificates. The Vault CA provider uses the Vault PKI secrets engine to generate and sign certificates.
|
|
---
|
|
|
|
# Vault as a Connect CA
|
|
|
|
Consul can be used with [Vault](https://www.vaultproject.io) to
|
|
manage and sign certificates.
|
|
The Vault CA provider uses the
|
|
[Vault PKI secrets engine](https://www.vaultproject.io/docs/secrets/pki/index.html)
|
|
to generate and sign certificates.
|
|
|
|
-> This page documents the specifics of the built-in CA provider.
|
|
Please read the [certificate management overview](/docs/connect/ca.html)
|
|
page first to understand how Consul manages certificates with configurable
|
|
CA providers.
|
|
|
|
## Requirements
|
|
|
|
Prior to using Vault as a CA provider for Consul, the following requirements
|
|
must be met:
|
|
|
|
* **Vault 0.10.3 or later.** Consul uses URI SANs in the PKI engine which
|
|
were introduced in Vault 0.10.3. Prior versions of Vault are not
|
|
compatible with Connect.
|
|
|
|
## Configuration
|
|
|
|
The Vault CA is enabled by setting the `ca_provider` to `"vault"` and
|
|
setting the required configuration values. An example configuration
|
|
is shown below:
|
|
|
|
```hcl
|
|
connect {
|
|
enabled = true
|
|
ca_provider = "vault"
|
|
ca_config {
|
|
address = "http://localhost:8200"
|
|
token = "..."
|
|
root_pki_path = "connect-root"
|
|
intermediate_pki_path = "connect-intermediate"
|
|
}
|
|
}
|
|
```
|
|
|
|
The set of configuration options is listed below. The
|
|
first key is the value used in API calls while the second key (after the `/`)
|
|
is used if configuring in an agent configuration file.
|
|
|
|
* `Address` / `address` (`string: <required>`) - The address of the Vault
|
|
server.
|
|
|
|
* `Token` / `token` (`string: <required>`) - A token for accessing Vault.
|
|
This is write-only and will not be exposed when reading the CA configuration.
|
|
This token must have proper privileges for the PKI paths configured.
|
|
|
|
* `RootPKIPath` / `root_pki_path` (`string: <required>`) - The path to
|
|
a PKI secrets engine for the root certificate. If the path doesn't
|
|
exist, Consul will attempt to mount and configure this automatically.
|
|
|
|
* `IntermediatePKIPath` / `intermediate_pki_path` (`string: <required>`) -
|
|
The path to a PKI secrets engine for the generated intermediate certificate.
|
|
This certificate will be signed by the configured root PKI path. If this
|
|
path doesn't exist, Consul will attempt to mount and configure this
|
|
automatically.
|
|
|
|
## Root and Intermediate PKI Paths
|
|
|
|
The Vault CA provider uses two separately configured
|
|
[PKI secrets engines](https://www.vaultproject.io/docs/secrets/pki/index.html)
|
|
for managing Connect certificates.
|
|
|
|
The `RootPKIPath` is the PKI engine for the root certificate. Consul will
|
|
use this root certificate to sign the intermediate certificate. Consul will
|
|
never attempt to write or modify any data within the root PKI path.
|
|
|
|
The `IntermediatePKIPath` is the PKI engine used for storing the intermediate
|
|
signed with the root certificate. The intermediate is used to sign all leaf
|
|
certificates and Consul may periodically generate new intermediates for
|
|
automatic rotation. Therefore, Consul requires write access to this path.
|
|
|
|
If either path does not exist, then Consul will attempt to mount and
|
|
initialize it. This requires additional privileges by the Vault token in use.
|
|
If the paths already exist, Consul will use them as configured.
|