(DOCSP-7997): Release notes for Kubernetes Operator 1.4.0 (#155)

* (DOCSP-7997): Release notes for Kubernetes Operator 1.4.0

* (DOCSP-7997): Tech review

Author: melissamahoney-mongodb

source/release-notes.txt

@@ -12,6 +12,51 @@ Release Notes for |k8s-op-full|
    :depth: 1
    :class: singlecol
 
+.. _ent-op-1.4.0:
+
+|k8s-op-full| 1.4.0
+-------------------
+
+*Released 2019-12-09*
+
+MongoDB Resource Changes
+~~~~~~~~~~~~~~~~~~~~~~~~
+ 
+- Adds split horizon DNS support for MongoDB replica sets, which allows
+  clients to connect to a replica set from outside of the Kubernetes
+  cluster.
+- Supports requests for |k8s-op-short|-generated certificates for
+  additional certificate domains, which makes them valid for the
+  specified subdomains. 
+
+|onprem| Resource Changes (Beta Release)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ 
+- Promotes the ``MongoDBOpsManager`` resource to Beta. |onprem| version
+  4.2.4 is available.
+- Supports Backup and restore in |k8s-op-short|-deployed |onprem|
+  instances. This is a semi-automated process that deploys everything
+  you need to enable backups in |onprem|. You can enable Backup by
+  setting the ``spec.backup.enabled`` setting in the |onprem| custom
+  resource. You can configure the Head Database, Oplog Store, and S3
+  Snapshot Store by using the ``MongoDBOpsManager`` resource
+  specification. 
+- Supports access to |onprem| from outside the |k8s|
+  cluster through the ``spec.externalConnectivity`` setting. 
+- Enables ``SCRAM-SHA-1`` authentication on |onprem|\'s
+  :opsmgr:`Application Database
+  </core/system-overview/#application-database>` by default. 
+- Adds support for OpenShift (Red Hat UBI Images).
+
+For more information on how to enable new features, see the sample YAML
+files in the :gh:`samples directory
+</mongodb/mongodb-enterprise-kubernetes/tree/master/samples/ops-manager>`.
+ 
+Bug Fixes
+~~~~~~~~~
+ 
+- Improves overall stability of X.509 user management.
+
 .. _ent-op-1.3.1:
 
 |k8s-op-full| 1.3.1