DC/OS Elastic Security

The DC/OS Elastic service supports Elastic’s X-Pack transport encryption mechanisms. The service provides automation and orchestration to simplify the use of these important features. At this time, X-Pack’s authentication and authorization features are not supported.

A good overview of X-Pack can be found here.

Note: These security features are only available on DC/OS Enterprise 1.10 and later.

Transport Encryption

With transport encryption enabled, DC/OS Elastic will automatically deploy all nodes with the correct configuration to encrypt communication via SSL. The nodes will communicate securely between themselves using SSL.

The service uses the DC/OS CA to generate the SSL artifacts that it uses to secure the service. Any client that trusts the DC/OS CA will consider the service’s certificates valid.

Note: X-Pack is required to enable Transport Encryption.

Prerequisites

Configure Transport Encryption

Set up the Service Account

Grant the service account the correct permissions.

  • In DC/OS 1.10, the required permission is dcos:superuser full.
  • In DC/OS 1.11 and later, the required permissions are:
dcos:secrets:default:/<service name>/* full
dcos:secrets:list:default:/<service name> read
dcos:adminrouter:ops:ca:rw full
dcos:adminrouter:ops:ca:ro full

where <service name> is the name of the service to be installed.

Install the service

Install the DC/OS Elastic service including the following options in addition to your own:

{
    "service": {
        "service_account": "<your service account name>",
        "service_account_secret": "<full path of service secret>",
        "security": {
            "transport_encryption": {
                "enabled": true
            }
        }
    }, "elasticsearch": { "xpack_enabled": true }
}

Note: It is possible to enable Transport Encryption after initial installation, but it requires setting service.update_strategy to parallel. After the update is complete, service.update_strategy should be set back to serial.

Warning: Because the update must occur in parallel, the service will be unavailable during the transition. Additionally, clients will need to be reconfigured after the transition.

Transport Encryption for Clients

With Transport Encryption enabled, service clients will need to be configured to use the DC/OS CA bundle to verify the connections they make to the service. Consult your client’s documentation for trusting a CA and configure your client appropriately.

Kibana

To use the DC/OS Kibana service in tandem with DC/OS Elastic when the latter has Transport Encryption enabled, install (or update) Kibana with the following options in addition to your own:

{
    "kibana": {
        "xpack_enabled": true,
        "elasticsearch_tls": true,
        "elasticsearch_url": "https://<elastic-coordinator-vip>"
    }
}

This configures the Kibana service to connect securely to the Elastic service.

Note: Currently, the Kibana service does not support Transport Encryption for its own clients.