Adding release notes and tagging docs for 2.4.0 release

Change-Id: Ic037678de1ad29a9026d2506048b9d3cd38b4494
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-2.4.0-dev
+2.4.0
diff --git a/release_notes/voltha_2.4.rst b/release_notes/voltha_2.4.rst
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+VOLTHA 2.4 Release Notes
+========================
+
+Highlights
+----------
+
+VOLTHA 2.4 together with ONOS 2.2.3 is the first release with full support for
+all 3 operator workflows - AT&T’s 1 TCONT- 4 GEMs, Deutsche Telekom’s  FTTH 1
+TCONT- 8 GEMs, and Turk Telekom’s  Multi-TCONT triple-play workflows. Also,
+for the first time, this release supports whitebox GPON OLTs and in-band management
+of remotely-located OLTs. It improves on performance and scale, achieving the
+MVP 1.0 requirements for production deployments of 2 OLTs with 500 ONUs each for
+the AT&T and DT workflows. The release also expands on automated-tests,
+with over 100+ tests run nightly in regression testing jobs across 3 hardware pods,
+delivering improved stability and robustness. VOLTHA 2.4 also comes on top of
+up-to-date versions of key infrastructure components such as HELM 3 and Kubernetes 1.18.
+
+
+Features & Improvements
+-----------------------
+
+- Full support for Turk Telekom triple play workflow with HSIA, Multicast IPTV, VoIP and VoD using T-CONTS per service.
+  Two new ONOS apps introduced - igmp-proxy and mcast
+- Support for multiple OLTs in a single-VOLTHA stack.
+- Support for GPON OLTs, specifically EdgeCore’s ASGvOLT64 OLT
+- Support for ONOS controller clustering (typically with 3 ONOS instances and 3 Atomix instances) for scale and high
+  availability. All 7 ONOS applications used with VOLTHA upgraded to work in a clustered setting.
+- Support for multiple ONU adaptor instances for scaling out (internal to a VOLTHA stack)
+- Support for In-band Management of OLTs
+- BAL transitioned from version 3.2.3.2 to version 3.4.3.3 with several bug fixes
+- Full DT and ATT workflow support on BBSIM simulator for scale testing
+- Scale improvements to meet MVP 1 targets of 2 OLTs with 500 ONUs each for both DT and ATT workflows,
+  including several improvements to VOLTHA core data models.
+- Enhanced Meter handling for Bandwidth profile support.
+- Enhanced Group handling and cleanup.
+
+Development process
+-------------------
+
+- Update to Kubernetes 1.18.5
+- Update to Helm3 of all the charts and deployment tools.
+
+Testing
+-------
+
+- Integration Tests
+
+  - Automated tests run on both hardware and BBSim platforms, please use the VOLTHA-2.4 view under https://jenkins.opencord.org/
+  - Sanity test on hardware for TT workflow
+  - In Band Management of OLT on one of the ONF Menlo testing pods
+  - GPON OLT test job in Berlin pod
+
+- Scale Tests
+
+  - Met required scale measurements with 2 OLTs and 500 ONUs each for both ATT and DT workflows
+
+Documentation
+-------------
+
+- Updated documentation with workflow specific orientation and published on https://docs.voltha.org
+
+Known Issues
+------------
+
+- [VOL-3376]  Data rate error margin beyond allowed limit
+- [VOL-3377]  In-band interface does not get an IP address from DHCP sometimes due to an issue in BAL.
+  Workaround automatically reboots the OLT.
+- [VOL-3125]  Bandwidth profile not enforced with BAL 3.4.3.3.
+- [VOL-3241] Scale measurements require the use of etcd in-memory
+
+Component Versions
+------------------
+
+`Helm Charts (voltha-helm-charts) <https://gerrit.opencord.org/gitweb?p=voltha-helm-charts.git;a=tree;h=refs/heads/voltha-2.4>`_
+
+voltha ``2.5.5`` with container images:
+
+- `voltha-rw-core <https://gerrit.opencord.org/gitweb?p=voltha-go.git;a=tree;h=refs/heads/voltha-2.4>`_: ``2.4.4``
+- `ofagent-go <https://gerrit.opencord.org/gitweb?p=ofagent-go.git;a=tree;h=refs/heads/voltha-2.4>`_: ``1.2.6``
+
+voltha-adapter-openolt: ``2.5.8`` with container image `voltha-openolt-adapter
+<https://gerrit.opencord.org/gitweb?p=voltha-openolt-adapter.git;a=tree;h=refs/heads/voltha-2.4>`_:
+``2.4.13``
+
+voltha-adapter-openonu ``2.4.6`` with container image `voltha-openonu-adapter
+<https://gerrit.opencord.org/gitweb?p=voltha-openonu-adapter.git;a=tree;h=refs/heads/voltha-2.4>`_:
+``2.4.8``
+
+`voltha-onos
+<https://gerrit.opencord.org/gitweb?p=voltha-onos.git;a=tree;h=refs/heads/voltha-2.4>`_:
+`onos chart
+<https://github.com/onosproject/onos-helm-charts/tree/master/onos-classic>`_
+``0.1.1`` using container image ``4.1.3``
+
+`ONOS <https://gerrit.onosproject.org/plugins/gitiles/onos>`_: ``2.2.3``
+
+ONOS App versions:
+
+- `aaa <https://gerrit.opencord.org/gitweb?p=aaa.git;a=summary>`_: ``2.1.0``
+- `dhcpl2relay <https://gerrit.opencord.org/gitweb?p=dhcpl2relay.git;a=summary>`_: ``2.1.0``
+- `igmpproxy <https://gerrit.opencord.org/gitweb?p=igmpproxy.git;a=summary>`_: ``2.1.2``
+- `kafka <https://gerrit.opencord.org/gitweb?p=kafka-onos.git;a=summary>`_: ``2.3.1``
+- `mcast <https://gerrit.opencord.org/gitweb?p=mcast.git;a=summary>`_: ``2.1.0``
+- `olt <https://gerrit.opencord.org/gitweb?p=olt.git;a=summary>`_: ``4.1.2``
+- `sadis <https://gerrit.opencord.org/gitweb?p=sadis.git;a=summary>`_: ``5.1.0``
+
+`bbsim
+<https://gerrit.opencord.org/gitweb?p=bbsim.git;a=tree;h=refs/heads/voltha-2.4>`_:
+`bbsim chart
+<https://gerrit.opencord.org/gitweb?p=helm-charts.git;a=tree;f=bbsim>`_
+``3.1.0`` using container image: ``0.2.6``
+
+`OpenOLT Agent
+<https://gerrit.opencord.org/gitweb?p=openolt.git;a=tree;h=refs/heads/voltha-2.4>`_
+``2.4.9`` using ``BAL 3.4.3.3`` SDK
+
+**Available from EdgeCore site**
+
+- Out of band management
+
+  - ONL version (both GPON and XGSPON) ONL-onl-4.14_ONL-OS8_2020-04-14.1946-72b95a7_AMD64_INSTALLED_INSTALLER
+  - ``openolt_asfvolt16-2.4.9-dev-d4aeca5a2094f7dc7c519913ab1558348c546dab.deb`` for ASFVOLT16
+  - ``openolt_asgvolt64-2.4.9-dev-d4aeca5a2094f7dc7c519913ab1558348c546dab.deb`` for ASGVOLT64
+
+- In band management
+
+  - use ONL image, comprising of Bal and openolt (available from edgecore site)
+    for ASFVOLT16 ``ONL-onl-4.14_ONL-OS8_2020-07-24.2214-72b95a7_AMD64_INSTALLED_INSTALLER``
+
+Get access credentials for https://edgecore.quickconnect.to and then login
+and navigate to File_Station -> EdgecoreNAS, and then the folder
+/ASXvOLT16/OpenOLT_Agent/From_ONF_Distribution/ and pick the version above
+
+A full list of Jira tickets releated to the VOLTHA 2.4 release is available
+`here <https://docs.google.com/document/d/1BolYA52uJ0LVJkYz5SYPWdWamkt4J3yP6CLhH7FNjBg/edit?usp=sharing>`_ .