Merge pull request #81 from simitt/docs-add-apm-server

[DOCS] Add APM Server.

Author: dedemorton

docs/index.asciidoc

@@ -12,6 +12,7 @@ to simplify the installation and upgrade process. The full stack
 consists of:
 
 * {beats-ref}/index.html[Beats {branch}]
+* {apm-server-ref}/index.html[APM Server {branch}]
 * {ref}/index.html[Elasticsearch {branch}]
 * {hadoop-ref}/index.html[Elasticsearch Hadoop {branch}]
 * {kibana-ref}/index.html[Kibana {branch}]

docs/installing-stack.asciidoc

@@ -3,7 +3,7 @@
 
 When installing the Elastic Stack, you must use the same version
 across the entire stack. For example, if you are using Elasticsearch
-{version}, you install Beats {version}, Elasticsearch Hadoop {version},
+{version}, you install Beats {version}, APM Server {version}, Elasticsearch Hadoop {version},
 Kibana {version}, and Logstash {version}.
 
 If you're upgrading an existing installation, see <<upgrading-elastic-stack, Upgrading the Elastic Stack>> for information about how to ensure compatibility with {version}.
@@ -17,6 +17,7 @@ Install the Elastic Stack products you want to use in the following order:
 . Kibana ({kibana-ref}/install.html[install])
 . Logstash ({logstash-ref}/installing-logstash.html[install])
 . Beats ({beats-ref}/getting-started.html[install instructions])
+. APM Server ({apm-server-ref}/installing.html[install instructions])
 . Elasticsearch Hadoop ({hadoop-ref}/install.html[install instructions])
 
 Installing in this order ensures that the components each product depends

docs/upgrading-stack.asciidoc

@@ -45,6 +45,7 @@ and make the necessary changes so your code is compatible with {version}:
 +
 --
 ** {beats-ref}/breaking-changes.html[Beats {version} breaking changes]
+** {apm-server-ref}/breaking-changes.html[APM Server {version} breaking changes]
 ** {ref}/breaking-changes.html[Elasticsearch {version} breaking changes]
 ** {hadoop-ref}/breaking-changes.html[Elasticsearch Hadoop {version} breaking changes]
 ** {kibana-ref}/breaking-changes.html[Kibana {version} breaking changes]
@@ -103,6 +104,7 @@ Upgrade the Elastic Stack products you use in the following order:
 . Kibana: {kibana-ref}/upgrade.html[upgrade instructions]
 . Logstash: {logstash-ref}/upgrading-logstash.html[upgrade instructions]
 . Beats: {beats-ref}/upgrading.html[upgrade instructions]
+. APM Server: {apm-server-ref}/upgrading.html[upgrade instructions]
 
 NOTE: Logstash 5.6 and 6.n and Beats 5.6 and 6.n are compatible with all 6.n versions of
 Elasticsearch. This provides flexibility in when you schedule the upgrades