Copy from logstash-docs@5.x

Fixes #6323

docs/index.asciidoc

@@ -0,0 +1,150 @@
+[[logstash-reference]]
+= Logstash Reference
+
+:branch:                5.x
+:major-version:         5.x
+:logstash_version:      5.1.0
+:elasticsearch_version: 5.1.0
+:docker-image:          docker.elastic.co/logstash/logstash:{logstash_version}
+
+//////////
+release-state can be: released | prerelease | unreleased
+//////////
+:release-state:  unreleased
+
+:jdk:                   1.8.0
+:guide:                 https://www.elastic.co/guide/en/elasticsearch/guide/current/
+:ref:                   https://www.elastic.co/guide/en/elasticsearch/reference/5.x/
+:xpack:                 https://www.elastic.co/guide/en/x-pack/current/
+:logstash:              https://www.elastic.co/guide/en/logstash/5.x/
+:filebeat:              https://www.elastic.co/guide/en/beats/filebeat/5.x/
+:lsissue:               https://github.com/elastic/logstash/issues/
+:security:              X-Pack Security
+:stack:                 https://www.elastic.co/guide/en/elastic-stack/current/
+
+[[introduction]]
+== Logstash Introduction
+
+Logstash is an open source data collection engine with real-time pipelining capabilities. Logstash can dynamically
+unify data from disparate sources and normalize the data into destinations of your choice. Cleanse and democratize all
+your data for diverse advanced downstream analytics and visualization use cases.
+
+While Logstash originally drove innovation in log collection, its capabilities extend well beyond that use case. Any
+type of event can be enriched and transformed with a broad array of input, filter, and output plugins, with many
+native codecs further simplifying the ingestion process. Logstash accelerates your insights by harnessing a greater
+volume and variety of data.
+
+// The pass blocks here point to the correct repository for the edit links in the guide.
+
+// Introduction
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/introduction.asciidoc ?>]
+include::static/introduction.asciidoc[]
+
+// Glossary and core concepts go here
+
+// Getting Started with Logstash
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/getting-started-with-logstash.asciidoc ?>]
+include::static/getting-started-with-logstash.asciidoc[]
+
+// Advanced LS Pipelines
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/advanced-pipeline.asciidoc ?>]
+include::static/advanced-pipeline.asciidoc[]
+
+// Processing Pipeline
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/life-of-an-event.asciidoc ?>]
+include::static/life-of-an-event.asciidoc[]
+
+// Lostash setup
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/setting-up-logstash.asciidoc ?>]
+include::static/setting-up-logstash.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/docker.asciidoc ?>]
+include::static/docker.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/settings-file.asciidoc ?>]
+include::static/settings-file.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/command-line-flags.asciidoc ?>]
+include::static/command-line-flags.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/logging.asciidoc ?>]
+include::static/logging.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/stalled-shutdown.asciidoc ?>]
+include::static/stalled-shutdown.asciidoc[]
+
+// Breaking Changes
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/breaking-changes.asciidoc ?>]
+include::static/breaking-changes.asciidoc[]
+
+// Upgrading Logstash
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/upgrading.asciidoc ?>]
+include::static/upgrading.asciidoc[]
+
+// Configuring Logstash
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/configuration.asciidoc ?>]
+include::static/configuration.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/reloading-config.asciidoc ?>]
+include::static/reloading-config.asciidoc[]
+
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/managing-multiline-events.asciidoc ?>]
+include::static/managing-multiline-events.asciidoc[]
+
+// Deploying & Scaling
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/deploying.asciidoc ?>]
+include::static/deploying.asciidoc[]
+
+// Troubleshooting performance
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/performance-checklist.asciidoc ?>]
+include::static/performance-checklist.asciidoc[]
+
+// Monitoring APIs
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/monitoring-apis.asciidoc ?>]
+include::static/monitoring-apis.asciidoc[]
+
+// Working with Plugins
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/plugin-manager.asciidoc ?>]
+include::static/plugin-manager.asciidoc[]
+
+// These files do their own pass blocks
+pass::[<?edit_url?>]
+include::plugins/inputs.asciidoc[]
+include::plugins/outputs.asciidoc[]
+include::plugins/filters.asciidoc[]
+include::plugins/codecs.asciidoc[]
+
+// Contributing to Logstash
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/contributing-to-logstash.asciidoc ?>]
+include::static/contributing-to-logstash.asciidoc[]
+
+// This is in the pluginbody.asciidoc itself
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/include/pluginbody.asciidoc ?>]
+include::static/input.asciidoc[]
+include::static/codec.asciidoc[]
+include::static/filter.asciidoc[]
+include::static/output.asciidoc[]
+
+// Contributing a Patch to a Logstash Plugin
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/contributing-patch.asciidoc ?>]
+include::static/contributing-patch.asciidoc[]
+
+// Logstash Community Maintainer Guide
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/maintainer-guide.asciidoc ?>]
+include::static/maintainer-guide.asciidoc[]
+
+// A space is necessary here ^^^
+pass::[<?edit_url?>]
+
+// Submitting a Plugin
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/submitting-a-plugin.asciidoc ?>]
+include::static/submitting-a-plugin.asciidoc[]
+
+
+// This is in the pluginbody.asciidoc itself
+// pass::[<?edit_url?>]
+
+// Glossary of Terms
+pass::[<?edit_url https://github.com/elastic/logstash/edit/master/docs/static/glossary.asciidoc ?>]
+include::static/glossary.asciidoc[]
+