Add Fleet and Elastic Agent 8.4 release notes (#2105)

(cherry picked from commit 452e14e)

Author: dedemorton

docs/en/ingest-management/index.asciidoc

@@ -153,7 +153,7 @@ include::troubleshooting/troubleshooting.asciidoc[leveloffset=+2]
 
 include::troubleshooting/faq.asciidoc[leveloffset=+2]
 
-include::release-notes/release-notes-8.3.asciidoc[leveloffset=+1]
+include::release-notes/release-notes-8.4.asciidoc[leveloffset=+1]
 
 include::elastic-agent/install-fleet-managed-agent.asciidoc[leveloffset=+2]
 

docs/en/ingest-management/release-notes/release-notes-8.4.asciidoc

@@ -0,0 +1,233 @@
+// Use these for links to issue and pulls.
+:kib-issue: https://github.com/elastic/kibana/issues/
+:kibana-pull: https://github.com/elastic/kibana/pull/
+:agent-issue: https://github.com/elastic/elastic-agent/issues/
+:beats-issue: https://github.com/elastic/beats/issues/
+:agent-libs-pull: https://github.com/elastic/elastic-agent-libs/pull/
+:agent-pull: https://github.com/elastic/elastic-agent/pull/
+:fleet-server-issue: https://github.com/elastic/beats/issues/fleet-server/
+:fleet-server-pull: https://github.com/elastic/beats/pull/fleet-server/
+
+[[release-notes]]
+= Release notes
+
+This section summarizes the changes in each release.
+
+* <<release-notes-8.4.0>>
+
+
+Also see:
+
+* {kibana-ref}/release-notes.html[{kib} release notes]
+* {beats-ref}/release-notes.html[{beats} release notes]
+
+// begin 8.4.0 relnotes
+
+[[release-notes-8.4.0]]
+== {fleet} and {agent} 8.4.0
+
+Review important information about the {fleet} and {agent} 8.4.0 release.
+
+[discrete]
+[[breaking-changes-8.4.0]]
+=== Breaking changes
+
+Breaking changes can prevent your application from optimal operation and
+performance. Before you upgrade, review the breaking changes, then mitigate the
+impact to your application.
+
+[discrete]
+[[breaking-135669]]
+.xpack.agents.* are uneditable in UI when defined in kibana.yml
+[%collapsible]
+====
+*Details* +
+When you configure `setxpack.fleet.agents.fleet_server.hosts` and `xpack.fleet.agents.elasticsearch.hosts` in kibana.yml, you are unable to update the fields on the Fleet UI. 
+For more information, refer to {kibana-pull}135669[#135669].
+
+*Impact* +
+To configure `setxpack.fleet.agents.fleet_server.hosts` and `xpack.fleet.agents.elasticsearch.hosts` on the Fleet UI, avoid configuring the settings in kibana.yml.
+====
+
+[discrete]
+[[new-features-8.4.0]]
+=== New features
+
+The 8.4.0 release adds the following new and notable features. 
+ 
+{fleet}::
+* Allow user to force install an unverified package {kibana-pull}136108[#136108]
+* Add tag rename and delete feature {kibana-pull}135712[#135712]
+* Add UI to bulk update agent tags {kibana-pull}135646[#135646]
+* Add API to bulk update agent tags {kibana-pull}135520[#135520]
+* Add UI to add and remove agent tags {kibana-pull}135320[#135320]
+* Support sorting agent list {kibana-pull}135218[#135218]
+* Promote Logstash output support to GA {kibana-pull}135028[#135028]
+* Create new API to manage download_source setting for agent binary downloads
+{kibana-pull}134889[#134889]
+
+{agent}::
+* Add `@metadata.input_id` and `@metadata.stream_id` when applying the inject
+stream processor {agent-pull}527[#527]
+* Improve {agent} status reporting: add a liveness endpoint, allow the
+fleet-gateway component to report degraded state, and add the status update time
+and messages to the status output {agent-issue}390[#390] {agent-pull}569[#569]
+* Redact sensitive information collected by the
+`elastic-agent diagnostics collect` command {agent-issue}241[#241]
+{agent-pull}566[#566]
+
+[discrete]
+[[enhancements-8.4.0]]
+=== Enhancements
+
+{fleet}::
+* Remove Kubernetes package granularity {kibana-pull}136622[#136622]
+* Align {agent} manifests with the elastic-agent repo and add comments {kibana-pull}136394[#136394]
+* Configure source URI in global settings and in agent policy settings {kibana-pull}136263[#136263]
+* Add Kubernetes in platforms selection list and update managed agent installation steps {kibana-pull}136109[#136109]
+* Enable user to write custom ingest pipelines for {fleet}-installed datastreams {kibana-pull}134578[#134578]
+* Update manifests for agent on Kubernetes with new permissions {kibana-pull}133495[#133495]
+* Add support for a textarea type in integrations {kibana-pull}133070[#133070]
+
+{agent}::
+There are no enhancements beyond the new features added in this release
+
+[discrete]
+[[bug-fixes-8.4.0]]
+=== Bug fixes
+
+{fleet}::
+* Use point in time for agent status query to provide accurate reporting
+{kibana-pull}135816[#135816]
+
+{agent}::
+* Change default value of VerificationMode from empty string to `full`
+{agent-issue}184[#184] {agent-libs-pull}59[#59]
+* Add filemod times to contents of diagnostics collect command {agent-pull}570[#570]
+* Allow colon (:) characters in dynamic variables {agent-issue}624[#624] {agent-pull}680[#680]
+* Allow dash (`-`) characters in variable names in EQL expressions
+{agent-issue}709[#709] {agent-pull}710[#710]
+* Allow slash (`/`) characters in variable names in EQL and transpiler
+{agent-issue}715[#715] {agent-pull}718[#718]
+* Fix problem with {agent} incorrectly creating a {filebeat} `redis` input when
+a policy contains a {packetbeat} `redis` input {agent-issue}427[#427]
+{agent-pull}700[#700]
+* Fix data duplication for standalone {agent} on Kubernetes using the default
+manifest {beats-issue}31512[#31512] {agent-pull}742[#742]
+* {agent} upgrades now clean up unneeded artifacts {agent-issue}693[#693]
+{agent-issue}694[#694] {agent-pull}752[#752]
+* Fix a panic caused by a race condition when installing the {agent}
+{agent-issue}806[#806] {agent-pull}823[#823]
+
+// end 8.4.0 relnotes
+
+
+
+// ---------------------
+//TEMPLATE
+//Use the following text as a template. Remember to replace the version info.
+
+// begin 8.4.x relnotes
+
+//[[release-notes-8.4.x]]
+//== {fleet} and {agent} 8.4.x
+
+//Review important information about the {fleet} and {agent} 8.4.x release.
+
+//[discrete]
+//[[security-updates-8.4.x]]
+//=== Security updates
+
+//{fleet}::
+//* add info
+
+//{agent}::
+//* add info
+
+//[discrete]
+//[[breaking-changes-8.4.x]]
+//=== Breaking changes
+
+//Breaking changes can prevent your application from optimal operation and
+//performance. Before you upgrade, review the breaking changes, then mitigate the
+//impact to your application.
+
+//[discrete]
+//[[breaking-PR#]]
+//.Short description
+//[%collapsible]
+//====
+//*Details* +
+//<Describe new behavior.> For more information, refer to {kibana-pull}PR[#PR].
+
+//*Impact* +
+//<Describe how users should mitigate the change.> For more information, refer to {fleet-guide}/fleet-server.html[Fleet Server].
+//====
+
+//[discrete]
+//[[known-issues-8.4.x]]
+//=== Known issues
+
+//[[known-issue-issue#]]
+//.Short description
+//[%collapsible]
+//====
+
+//*Details*
+
+//<Describe known issue.>
+
+//*Impact* +
+
+//<Describe impact or workaround.>
+
+//====
+
+//[discrete]
+//[[deprecations-8.4.x]]
+//=== Deprecations
+
+//The following functionality is deprecated in 8.4.x, and will be removed in
+//8.4.x. Deprecated functionality does not have an immediate impact on your
+//application, but we strongly recommend you make the necessary updates after you
+//upgrade to 8.4.x.
+
+//{fleet}::
+//* add info
+
+//{agent}::
+//* add info
+
+//[discrete]
+//[[new-features-8.4.x]]
+//=== New features
+
+//The 8.4.x release adds the following new and notable features.
+
+//{fleet}::
+//* add info
+
+//{agent}::
+//* add info
+
+//[discrete]
+//[[enhancements-8.4.x]]
+//=== Enhancements
+
+//{fleet}::
+//* add info
+
+//{agent}::
+//* add info
+
+//[discrete]
+//[[bug-fixes-8.4.x]]
+//=== Bug fixes
+
+//{fleet}::
+//* add info
+
+//{agent}::
+//* add info
+
+// end 8.4.x relnotes