CentOS 7
Sponsored Link

Elastic Stack 6 : Install X-Pack
Install X-Pack which extends features of Elasticsearch or Kibana.
Most plugins included in X-Pack are not for free, so you mush buy licenses to use.
However, you can try to use for 30 days with trial license.
Refer to the official site about subscription below.
⇒ https://www.elastic.co/subscriptions
[1] Install X-Pack for Elasticsearch on all Elasticsearch Nodes in Cluster.
[root@dlp ~]#
/usr/share/elasticsearch/bin/elasticsearch-plugin install x-pack

-> Downloading x-pack from elastic
[=================================================] 100%  
@     WARNING: plugin requires additional permissions     @
* java.io.FilePermission \\.\pipe\* read,write
* java.lang.RuntimePermission accessClassInPackage.com.sun.activation.registries
* java.lang.RuntimePermission getClassLoader
* java.lang.RuntimePermission setContextClassLoader
* java.lang.RuntimePermission setFactory
* java.net.SocketPermission * connect,accept,resolve
* java.security.SecurityPermission createPolicy.JavaPolicy
* java.security.SecurityPermission getPolicy
* java.security.SecurityPermission putProviderProperty.BC
* java.security.SecurityPermission setPolicy
* java.util.PropertyPermission * read,write
See http://docs.oracle.com/javase/8/docs/technotes/guides/security/permissions.html
for descriptions of what these permissions allow and the associated risks.

Continue with installation? [y/N] y
@        WARNING: plugin forks a native controller        @
This plugin launches a native controller that is not subject to the Java
security manager nor to system call filters.

Continue with installation? [y/N] y
Elasticsearch keystore is required by plugin [x-pack-security], creating...
-> Installed x-pack with: x-pack-core,x-pack-deprecation,x-pack-graph,x-pack-logstash,
[2] If Kibana is running, Install X-Pack for Kibana on Kibana installed Node, too.
[root@dlp ~]#
/usr/share/kibana/bin/kibana-plugin install x-pack

Attempting to transfer from x-pack
Attempting to transfer from https://artifacts.elastic.co/downloads/kibana-plugins/x-pack/x-pack-6.2.2.zip
Transferring 269704442 bytes....................
Transfer complete
Retrieving metadata from plugin archive
Extracting plugin archive
Extraction complete
Optimizing and caching browser bundles...
Plugin installation complete
[3] If Logstash is running, Install X-Pack for Logstash on Logstash installed Node, too.
[root@dlp ~]#
/usr/share/logstash/bin/logstash-plugin install x-pack

Downloading file: https://artifacts.elastic.co/downloads/logstash-plugins/x-pack/x-pack-6.2.2.zip
Downloading [=============================================================] 100%
Installing file: /tmp/studtmp-af3a51070a5bcce6ebfde84d3cca4bd4953756ae71755e99101218e6ac0d/x-pack-6.2.2.zip
Install successful
[4] Configure for X-Pack. Set like follows on all Elasticsearch Nodes in Cluster.
On this example, Disable most features like Security first. If you enable them, refer to the next tutorial.
About features of X-Pack, refer to the official site below.
⇒ https://www.elastic.co/guide/en/elasticsearch/reference/6.2/settings-xpack.html
[root@dlp ~]#
vi /etc/elasticsearch/elasticsearch.yml
# add to the end

# set license type (follow is the trial license)

xpack.license.self_generated.type: trial
# set Monitoring (enabled)

xpack.monitoring.enabled: true
# set Security (disabled)

xpack.security.enabled: false
# set Watcher (disabled)

xpack.watcher.enabled: false
# set Machine learning (disabled)

xpack.ml.enabled: false
[root@dlp ~]#
systemctl restart elasticsearch kibana logstash

# access to show the index list ,then you can find new data from Monitoring

[root@dlp ~]#
curl localhost:9200/_cat/indices?v

health status index                             uuid      pri rep docs.count docs.deleted store.size ...
green  open   test_index                        VfIZnk...   5   1          1            0     12.3kb ...
green  open   .monitoring-logstash-6-2018.02.23 -AXqna...   1   1        806            0    209.3kb ...
green  open   .monitoring-kibana-6-2018.02.25   itNQ-g...   1   1         76            0    137.4kb ...
green  open   .monitoring-es-6-2018.02.23       CiewsT...   1   1       4082           52      4.9mb ...
green  open   sshd_fail-2018.02                 1KDc16...   5   1         23            0    329.8kb ...
green  open   .monitoring-es-6-2018.02.25       w9Fm71...   1   1       1075           32      1.7mb ...
green  open   .monitoring-logstash-6-2018.02.25 9JqBNG...   1   1        534            0    274.7kb ...
green  open   .monitoring-kibana-6-2018.02.23   hnxoh-...   1   1        110            0    112.4kb ...
[5] If Kibana is running, you can find new data from Monitoring on Kibana, too.