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Elastic Stack 7 : X-Pack.Security2019/06/18
 
Configure X-Pack.Security feature.
This example is based on the environment like here, X-Pack.Security is now disabled.
[1] Enable X-Pack.Security feature on all Elasticsearch Nodes. And also set password on an Elasticsearch Master Node.
[root@dlp ~]#
/usr/share/elasticsearch/bin/elasticsearch-setup-passwords interactive 

Initiating the setup of passwords for reserved users elastic,apm_system,kibana,logstash_system,beats_system,remote_monitoring_user.
You will be prompted to enter passwords as the process progresses.
Please confirm that you would like to continue [y/N] y

Enter password for [elastic]:
Reenter password for [elastic]:
Enter password for [apm_system]:
Reenter password for [apm_system]:
Enter password for [kibana]:
Reenter password for [kibana]:
Enter password for [logstash_system]:
Reenter password for [logstash_system]:
Enter password for [beats_system]:
Reenter password for [beats_system]:
Enter password for [remote_monitoring_user]:
Reenter password for [remote_monitoring_user]:
Changed password for user [apm_system]
Changed password for user [kibana]
Changed password for user [logstash_system]
Changed password for user [beats_system]
Changed password for user [remote_monitoring_user]
Changed password for user [elastic]
[2] On an Elasticsearch Master Node in Cluster, Generate CA and Certificate.
[root@dlp ~]#
/usr/share/elasticsearch/bin/elasticsearch-certutil ca 

This tool assists you in the generation of X.509 certificates and certificate
signing requests for use with SSL/TLS in the Elastic stack.

The 'ca' mode generates a new 'certificate authority'
This will create a new X.509 certificate and private key that can be used
to sign certificate when running in 'cert' mode.

Use the 'ca-dn' option if you wish to configure the 'distinguished name'
of the certificate authority

By default the 'ca' mode produces a single PKCS#12 output file which holds:
    * The CA certificate
    * The CA's private key

If you elect to generate PEM format certificates (the -pem option), then the output will
be a zip file containing individual files for the CA certificate and private key

# specify output file name (if kepp default, Enter with empty)
Please enter the desired output file [elastic-stack-ca.p12]:
# set password
Enter password for elastic-stack-ca.p12 :
# --ca [generated CA file]

[root@dlp ~]#
/usr/share/elasticsearch/bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12 

This tool assists you in the generation of X.509 certificates and certificate
signing requests for use with SSL/TLS in the Elastic stack.

The 'ca' mode generates a new 'certificate authority'
This will create a new X.509 certificate and private key that can be used
to sign certificate when running in 'cert' mode.

Use the 'ca-dn' option if you wish to configure the 'distinguished name'
of the certificate authority

By default the 'ca' mode produces a single PKCS#12 output file which holds:
    * The CA certificate
    * The CA's private key

If you elect to generate PEM format certificates (the -pem option), then the output will
be a zip file containing individual files for the CA certificate and private key

Please enter the desired output file [elastic-stack-ca.p12]:
Enter password for elastic-stack-ca.p12 :
tic-stack-ca.p12sr/share/elasticsearch/bin/elasticsearch-certutil cert --ca elas
This tool assists you in the generation of X.509 certificates and certificate
signing requests for use with SSL/TLS in the Elastic stack.

The 'cert' mode generates X.509 certificate and private keys.
    * By default, this generates a single certificate and key for use
       on a single instance.
    * The '-multiple' option will prompt you to enter details for multiple
       instances and will generate a certificate and key for each one
    * The '-in' option allows for the certificate generation to be automated by describing
       the details of each instance in a YAML file

    * An instance is any piece of the Elastic Stack that requires a SSL certificate.
      Depending on your configuration, Elasticsearch, Logstash, Kibana, and Beats
      may all require a certificate and private key.
    * The minimum required value for each instance is a name. This can simply be the
      hostname, which will be used as the Common Name of the certificate. A full
      distinguished name may also be used.
    * A filename value may be required for each instance. This is necessary when the
      name would result in an invalid file or directory name. The name provided here
      is used as the directory name (within the zip) and the prefix for the key and
      certificate files. The filename is required if you are prompted and the name
      is not displayed in the prompt.
    * IP addresses and DNS names are optional. Multiple values can be specified as a
      comma separated string. If no IP addresses or DNS names are provided, you may
      disable hostname verification in your SSL configuration.

    * All certificates generated by this tool will be signed by a certificate authority (CA).
    * The tool can automatically generate a new CA for you, or you can provide your own with the
         -ca or -ca-cert command line options.

By default the 'cert' mode produces a single PKCS#12 output file which holds:
    * The instance certificate
    * The private key for the instance certificate
    * The CA certificate

If you specify any of the following options:
    * -pem (PEM formatted output)
    * -keep-ca-key (retain generated CA key)
    * -multiple (generate multiple certificates)
    * -in (generate certificates from an input file)
then the output will be be a zip file containing individual certificate/key files

# input password of CA you generated
Enter password for CA (elastic-stack-ca.p12) :
# specify output file name (if kepp default, Enter with empty)
Please enter the desired output file [elastic-certificates.p12]:
# set password
Enter password for elastic-certificates.p12 :

Certificates written to /usr/share/elasticsearch/elastic-certificates.p12

This file should be properly secured as it contains the private key for
your instance.

This file is a self contained file and can be copied and used 'as is'
For each Elastic product that you wish to configure, you should copy
this '.p12' file to the relevant configuration directory
and then follow the SSL configuration instructions in the product guide.

For client applications, you may only need to copy the CA certificate and
configure the client to trust this certificate.
[root@dlp ~]#
chgrp elasticsearch /usr/share/elasticsearch/elastic-certificates.p12 /usr/share/elasticsearch/elastic-stack-ca.p12

[root@dlp ~]#
chmod 640 /usr/share/elasticsearch/elastic-certificates.p12 /usr/share/elasticsearch/elastic-stack-ca.p12

[root@dlp ~]#
mv /usr/share/elasticsearch/elastic-* /etc/elasticsearch/

[3]
Copy CA and Certificate you generated above to all Elasticsearch Nodes in cluster.
(on this example, it's under [/etc/elasticsearch/])
[4] Configure X-Pack.Security for CA and Certificate on all Elasticsearch Nodes.
# add CA password to keystore

[root@dlp ~]#
/usr/share/elasticsearch/bin/elasticsearch-keystore add xpack.security.transport.ssl.keystore.secure_password

Enter value for xpack.security.transport.ssl.keystore.secure_password:
# add Certificate password to keystore

[root@dlp ~]#
/usr/share/elasticsearch/bin/elasticsearch-keystore add xpack.security.transport.ssl.truststore.secure_password

Enter value for xpack.security.transport.ssl.truststore.secure_password:
[root@dlp ~]#
vi /etc/elasticsearch/elasticsearch.yml
xpack.license.self_generated.type: trial
xpack.monitoring.collection.enabled: true
# enable Security feature

xpack.security.enabled:
true
# add to the end

xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /etc/elasticsearch/elastic-certificates.p12
xpack.security.transport.ssl.truststore.path: /etc/elasticsearch/elastic-certificates.p12
[root@dlp ~]#
systemctl restart elasticsearch

[5] Set SSL Settings that is used on the connection between Elasticsearch Server and Clients.
So it needs to get SSL certificates.
The environment on this example, there are copied certificates under the [/etc/elasticsearch].
[root@dlp ~]#
chgrp elasticsearch /etc/elasticsearch/*.pem

[root@dlp ~]#
chmod 640 /etc/elasticsearch/*.pem

[root@dlp ~]#
vi /etc/elasticsearch/elasticsearch.yml
# add to the end

xpack.security.http.ssl.enabled: true
xpack.security.http.ssl.key: /etc/elasticsearch/privkey.pem
xpack.security.http.ssl.certificate: /etc/elasticsearch/fullchain.pem
[root@dlp ~]#
systemctl restart elasticsearch
# verify https access : the password is just the one you set on section [1]

[root@dlp ~]#
curl https://dlp.srv.world:9200/_cat/indices?v -u elastic 

Enter host password for user 'elastic':
health status index                              uuid                   pri rep docs.count docs.deleted store.size pri.store.size
yellow open   winlogbeat-7.1.1-2019.06.18-000001 9mTTgj-TQa2BqFP2e9CGvQ   1   1       1336            0      1.2mb          1.2mb
green  open   .security-7                        uNbYTp4VTwi1wtu-xC1x9g   1   0          6            0     19.8kb         19.8kb
green  open   .kibana_1                          hF7j0i5iRRSa9hAebihkfg   1   0        924           10    759.4kb        759.4kb
green  open   .kibana_task_manager               vxyGU_agTXyFTLac6lDMYg   1   0          2            0     12.8kb         12.8kb
green  open   .monitoring-es-7-2019.06.18        M5L-X5qFQ5WbUfsBcHdkeA   1   0       1996          338      1.4mb          1.4mb
yellow open   metricbeat-7.1.1-2019.06.18-000001 cXFRA4p3SaO_Jaahxxx-hw   1   1       7652            0      2.4mb          2.4mb
green  open   .monitoring-kibana-7-2019.06.18    nDKEG9fVQWKY9k4iU-nvoQ   1   0         66            0       53kb           53kb
yellow open   sshd_fail-2019.06                  Mu9wxqZPTkK2X9biuvGP1g   1   1         40            0     90.2kb         90.2kb
yellow open   packetbeat-7.1.1-2019.06.18-000001 1uSGzcBjQXO4VlTOKqtNSA   1   1      17787            0      6.7mb          6.7mb
[6] If Kibana or Logstash is running, Configure them for Security plugin, too.
[root@dlp ~]#
vi /etc/kibana/kibana.yml
# line 28: uncomment and change to https URL

elasticsearch.hosts: "
https://dlp.srv.world:9200
"
# line 46: uncomment and change to the username and password you set on section [1]

elasticsearch.username: "
kibana
"
elasticsearch.password: "
password
"
[root@dlp ~]#
systemctl restart kibana
[root@dlp ~]#
vi /etc/logstash/logstash.yml
# add to the end

# for username and password, they are the one you set on section [1]

xpack.monitoring.enabled: true
xpack.monitoring.elasticsearch.url: "https://dlp.srv.world:9200/"
xpack.monitoring.elasticsearch.username: "logstash_system"
xpack.monitoring.elasticsearch.password: "password"

xpack.management.enabled: true
xpack.management.elasticsearch.url: "https://dlp.srv.world:9200/"
xpack.management.elasticsearch.username: "logstash_system"
xpack.management.elasticsearch.password: "password"
[root@dlp ~]#
systemctl restart logstash
[7] Access to Kibana Dashboard, then username and password is required like follows. You can authenticate with them you set on section [1].
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