[DOCS] Update X-Pack installation instructions (elastic/x-pack-elasticsearch#4110)

Original commit: elastic/x-pack-elasticsearch@b3c21b8

Author: lcawl

docs/en/setup/installing-xes.asciidoc

@@ -5,169 +5,5 @@
 <titleabbrev>Installing {xpack}</titleabbrev>
 ++++
 
-After you install {es}, you can optionally obtain and install {xpack}.
-For more information about how to obtain {xpack},
-see https://www.elastic.co/products/x-pack.
-
-You must run the version of {xpack} that matches the version of {es} you are
-running. See the
-https://www.elastic.co/support/matrix#matrix_compatibility[Elastic Support Matrix]
-for more information about product compatibility.
-
-IMPORTANT: If you are installing {xpack} for the first time on an existing
-cluster, you must perform a full cluster restart. Installing {xpack} enables
-security and security must be enabled on ALL nodes in a cluster for the cluster
-to operate correctly. When upgrading you can usually perform
-a {ref}/rolling-upgrades.html[rolling upgrade].
-
-The following diagram provides an overview of the steps that are required to
-set up {xpack} on {es}:
-
-image::setup/images/ElasticsearchFlow.jpg[Installation overview on {es}]
-
-To install {xpack} in {es}:
-
-. Optional: If you want to install {xpack} on a machine that doesn't have
-internet access:
-
-.. Manually download the {xpack} zip file:
-https://artifacts.elastic.co/downloads/packs/x-pack/x-pack-{version}.zip[
-+https://artifacts.elastic.co/downloads/packs/x-pack/x-pack-{version}.zip+]
-(https://artifacts.elastic.co/downloads/packs/x-pack/x-pack-{version}.zip.sha512[sha512])
-+
---
-NOTE: The plugins for {es}, {kib}, and Logstash are included in the same zip
-file. If you have already downloaded this file to install {xpack} on one of
-those other products, you can reuse the same file.
-
---
-
-.. Transfer the zip file to a temporary directory on the offline machine. (Do
-NOT put the file in the {es} plugins directory.)
-
-. Run `bin/elasticsearch-plugin install` from `ES_HOME` on each node in your
-cluster:
-+
---
-[source,shell]
-----------------------------------------------------------
-bin/elasticsearch-plugin install x-pack
-----------------------------------------------------------
-
-NOTE: If you are using a <<xpack-package-installation, DEB/RPM distribution>>
-      of {es}, run the installation with superuser permissions.
-
-The plugin install scripts require direct internet access to download and
-install {xpack}. If your server doesn’t have internet access, specify the
-location of the {xpack} zip file that you downloaded to a temporary directory.
-
-["source","sh",subs="attributes"]
-----------------------------------------------------------
-bin/elasticsearch-plugin install file:///path/to/file/x-pack-{version}.zip
-----------------------------------------------------------
-
-NOTE:  You must specify an absolute path to the zip file after the `file://` protocol.
-
---
-
-. Confirm that you want to grant {xpack} additional permissions.
-+
---
-TIP:  Specify the `--batch` option when running the install command to
-      automatically grant these permissions and bypass these install prompts.
-
---
-+
-  .. {xpack} needs these permissions to set the threat context loader during
-  install so {watcher} can send email notifications.
-+
---
-[source,shell]
-----------------------------------------------------------
-@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-@     WARNING: plugin requires additional permissions     @
-@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-* java.lang.RuntimePermission accessClassInPackage.com.sun.activation.registries
-* java.lang.RuntimePermission getClassLoader
-* java.lang.RuntimePermission setContextClassLoader
-* java.lang.RuntimePermission setFactory
-* java.security.SecurityPermission createPolicy.JavaPolicy
-* java.security.SecurityPermission getPolicy
-* java.security.SecurityPermission putProviderProperty.BC
-* java.security.SecurityPermission setPolicy
-* java.util.PropertyPermission * read,write
-* java.util.PropertyPermission sun.nio.ch.bugLevel write
-* javax.net.ssl.SSLPermission setHostnameVerifier
-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
-----------------------------------------------------------
---
-  .. {xpack} requires permissions to enable {es} to launch the {ml} analytical
-  engine. The native controller ensures that the launched process is a valid
-  {ml} component. Once launched, communications between the {ml} processes and
-  {es} are limited to the operating system user that {es} runs as.
-+
---
-[source,shell]
-----------------------------------------------------------
-@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-@        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
-----------------------------------------------------------
---
-
-. {xpack} will try to automatically create a number of indices within {es}.
-+
---
-include::xpack-indices.asciidoc[]
---
-
-include::xpack-tls.asciidoc[]
-
-. Start {es}.
-+
---
-[source,shell]
-----------------------------------------------------------
-bin/elasticsearch
-----------------------------------------------------------
---
-
-include::xpack-passwords.asciidoc[]
-
-. Optional: <<setup-xpack-client, Configure the Java Client>>.
-
-. {kibana-ref}/installing-xpack-kb.html[Install {xpack} on {kib}].
-
-. {logstash-ref}/installing-xpack-log.html[Install {xpack} on Logstash].
-
-
-[float]
-[[xpack-package-installation]]
-=== Installing {xpack} on a DEB/RPM Package Installation
-
-If you use the DEB/RPM packages to install {es}, by default {es} is installed
-in `/usr/share/elasticsearch` and the configuration files are stored
-in `/etc/elasticsearch`. (For the complete list of default paths, see
-{ref}/deb.html#deb-layout[Debian Directory Layout] and
-{ref}/rpm.html#rpm-layout[RPM Directory Layout] in the {es} Reference.)
-
-To install {xpack} on a DEB/RPM package installation, you need to run
-`bin/plugin install` from the `/usr/share/elasticsearch` directory with superuser
-permissions:
-
-[source,shell]
-----------------------------------------------------------
-cd /usr/share/elasticsearch
-sudo bin/elasticsearch-plugin install x-pack
-----------------------------------------------------------
-
-NOTE: If the configuration files are not in `/etc/elasticsearch` you need to
-      specify the location of the configuration files by setting the environment
-      variable `ES_PATH_CONF` via `ES_PATH_CONF=<path>`.
+By default, when you install {es}, {xpack} is installed. See
+<<install-elasticsearch>>.