[role="xpack"]
[[bootstrap-checks-xpack]]
== Bootstrap Checks for {xpack}

In addition to the <<bootstrap-checks,{es} bootstrap checks>>, there are
checks that are specific to {xpack} features.

[float]
=== Encrypt sensitive data check
//See EncryptSensitiveDAtaBootstrapCheck.java

If you use {watcher} and have chosen to encrypt sensitive data (by setting
`xpack.watcher.encrypt_sensitive_data` to `true`), you must also place a key in
the secure settings store.

To pass this bootstrap check, you must set the `xpack.watcher.encryption_key`
on each node in the cluster. For more information, see
{xpack-ref}/encrypting-data.html[Encrypting Sensitive Data in {watcher}].

[float]
=== PKI realm check
//See PkiRealmBootstrapCheckTests.java

If you use {es} {security-features} and a Public Key Infrastructure (PKI) realm,
you must configure Transport Layer Security (TLS) on your cluster and enable
client authentication on the network layers (either transport or http). For more
information, see {stack-ov}/pki-realm.html[PKI user authentication] and
{stack-ov}/ssl-tls.html[Setting up TLS on a cluster].

To pass this bootstrap check, if a PKI realm is enabled, you must configure TLS
and enable client authentication on at least one network communication layer.

[float]
=== Role mappings check

If you authenticate users with realms other than `native` or `file` realms, you
must create role mappings. These role mappings define which roles are assigned
to each user.

If you use files to manage the role mappings, you must configure a YAML file
and copy it to each node in the cluster. By default, role mappings are stored in
`ES_PATH_CONF/role_mapping.yml`. Alternatively, you can specify a
different role mapping file for each type of realm and specify its location in
the `elasticsearch.yml` file. For more information, see
{stack-ov}/mapping-roles.html#mapping-roles-file[Using role mapping files].

To pass this bootstrap check, the role mapping files must exist and must be
valid. The Distinguished Names (DNs) that are listed in the role mappings files
must also be valid.

[float]
[[bootstrap-checks-tls]]
=== SSL/TLS check
//See TLSLicenseBootstrapCheck.java

If you enable {es} {security-features}, unless you have a trial license, you 
must configure SSL/TLS for internode-communication.

NOTE: Single-node clusters that use a loopback interface do not have this
requirement.  For more information, see
{stack-ov}/encrypting-communications.html[Encrypting communications].

To pass this bootstrap check, you must
{stack-ov}/ssl-tls.html[set up SSL/TLS in your cluster].


[float]
=== Token SSL check
//See TokenSSLBootstrapCheckTests.java

If you use {es} {security-features} and the built-in token service is enabled,
you must configure your cluster to use SSL/TLS for the HTTP interface. HTTPS is
required in order to use the token service.

In particular, if `xpack.security.authc.token.enabled` is
set to `true` in the `elasticsearch.yml` file, you must also set
`xpack.security.http.ssl.enabled` to `true`. For more information about these
settings, see <<security-settings>> and <<modules-http>>.

To pass this bootstrap check, you must enable HTTPS or disable the built-in
token service.