Add release instructions for Release Candidate (#809)

* Add release instructions for Release Candidate

* Add a section for release versioning

* Add a section for overall process triggered by the release manager

docs/dev_guide/feathr_overall_release_guide.md

@@ -10,62 +10,87 @@ This document describes all the release process for the development team.
 
 ## Prerequisites
 
-- Make sure the CI tests are passing so there are no surprises on the release day.
+- Make sure the CI tests are passing prior to bug bash.
 - Make sure all the active PRs related to the release are merged.
 
-
 ## When to Release
 
-- For each major and minor version release, please follow these steps.
-- For patch versions, there should be no releases.
+The release process is triggered by the release manager. The release manager will decide when to release with following steps:
+
+1. Ensure Prerequisites are met.
+2. Creation of Release Candidate(rc) on GitHub.
+3. Bug Bash.
+4. Creation of Release on GitHub.
+5. Post Release announcement.
+
+## Release Versioning
+
+- Major and minor version: X.Y.Z
+- Release Candidate: X.Y.Z-rcN
 
 ## Writing Release Note
 
 Write a release note following past examples [here](https://github.com/feathr-ai/feathr/releases).
 Read through the [commit log](https://github.com/feathr-ai/feathr/commits/main) to identify the commits after last release to include in the release note. Here are the major things to include
 
-- highlights of the release
-- improvements and changes of this release
-- new contributors of this release
+- Highlights of the release
+- Improvements and changes of this release
+- New contributors of this release
 
 ## Code Changes
-Before the release is made, the version needs to be updated in following places
+
+Before the release candidate or release is made, the version needs to be updated in following places
+
 - [build.sbt](https://github.com/feathr-ai/feathr/blob/main/build.sbt#L3) - For Maven release version
 - [version.py](https://github.com/feathr-ai/feathr/blob/main/feathr_project/feathr/version.py#L1) - For Feathr version
 - [conf.py](https://github.com/feathr-ai/feathr/blob/main/feathr_project/docs/conf.py#L27) - For documentation version
-- [feathr_config.yaml](https://github.com/feathr-ai/feathr/blob/main/feathr_project/test/test_user_workspace/feathr_config.yaml#L84) - To set the spark runtime location for Azure Synapse and Azure Databricks used by test suite. Please update all .yaml files under this path. 
-- [azure_resource_provision.json](https://github.com/feathr-ai/feathr/blob/main/docs/how-to-guides/azure_resource_provision.json#L114) - To set the deployment template to pull the latest release image.
-- [constants.py](https://github.com/feathr-ai/feathr/blob/main/feathr_project/feathr/constants.py#L31) - To set the default maven artifact version (Only needed when maven version is **NOT** the same as python sdk version)
+- [feathr_config.yaml](https://github.com/feathr-ai/feathr/blob/main/feathr_project/test/test_user_workspace/feathr_config.yaml#L84) - To set the spark runtime location for Azure Synapse and Azure Databricks used by test suite. Please update all .yaml files under this path.
 - [package.json](https://github.com/feathr-ai/feathr/blob/main/ui/package.json#L3) - For Feathr UI version
 
+Following file should only be updated for release, which means should be skipped for release candidate.
+
+- [azure_resource_provision.json](https://github.com/feathr-ai/feathr/blob/main/docs/how-to-guides/azure_resource_provision.json#L114) - To set the deployment template to pull the latest release image.
+
+## Release Branches
+
+Each major and minor release should have a release branch. The release branch should be named as `releases/vX.Y.Z` or `releases/vX.Y.Z-rcN` where `X.Y.Z` is the release version. The release branch should be created from the `main` branch. See past release branches [here](https://github.com/feathr-ai/feathr/branches/all?query=releases).
+
+## Release Tags
+
+Once the release branch is created, a release tag should be created from the release branch. The release tag should be named as `vX.Y.Z` or `vX.Y.Z-rcN` where `X.Y.Z` is the release version. See past release tags [here](https://github.com/feathr-ai/feathr/tags).
+
 ## Triggering automated release pipelines
-Our goal is to automate the release process as much as possible. So far, we have automated the following steps
-1. Automated [workflow](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/docker-publish.yml) to build and publish for our UI and API container to [dockerhub](https://hub.docker.com/r/feathrfeaturestore/feathr-registry/tags).
-    **Triggers** - Nightly, branch with name pattern "releases/*"
 
-1. Automated [workflow](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/publish-to-pypi.yml) for publishing Python package to [PyPi](https://pypi.org/project/feathr/).
+Once the release branch and release tag are created, the release pipelines will be triggered automatically. The release pipelines will build the release artifacts and publish them to Maven and PyPI.
+
+1. Automated [workflow](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/docker-publish.yml) to build and publish for Feathr Registry docker images to [DockerHub](https://hub.docker.com/r/feathrfeaturestore/feathr-registry/tags).
 
-    **Triggers** -  branch with name pattern "releases/*"
+    **Triggers** - Nightly or branch with name pattern "releases/*"
 
-1. Automated [workflow](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/publish-to-maven.yml) for publishing the jar to [maven/sonatype repository](https://oss.sonatype.org/).
+2. Automated [workflow](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/publish-to-pypi.yml) for publishing Python package to [PyPi](https://pypi.org/project/feathr/).
 
-**PLEASE NOTE: To trigger the above workflows as part of release, create a new branch with pattern releases/v0.x.0**. See past release branches [here](https://github.com/feathr-ai/feathr/branches/all?query=releases).
+    **Triggers** - branch with name pattern "releases/*"
 
+3. Automated [workflow](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/publish-to-maven.yml) for publishing the jar to [maven/sonatype repository](https://oss.sonatype.org/).
 
 ## Upload Feathr Jar
 
 Run the command to generate the Java jar. After the jar is generated, please upload to [Azure storage](https://ms.portal.azure.com/#view/Microsoft_Azure_Storage/ContainerMenuBlade/~/overview/storageAccountId/%2Fsubscriptions%2Fa6c2a7cc-d67e-4a1a-b765-983f08c0423a%2FresourceGroups%2Fazurefeathrintegration%2Fproviders%2FMicrosoft.Storage%2FstorageAccounts%2Fazurefeathrstorage/path/public/etag/%220x8D9E6F64D62D599%22/defaultEncryptionScope/%24account-encryption-key/denyEncryptionScopeOverride//defaultId//publicAccessVal/Container) for faster access.
 
 ## Release PyPi
+
 The automated workflow should take care of this, you can check under [actions](https://github.com/feathr-ai/feathr/actions/workflows/publish-to-pypi.yml) to see the triggered run and results. For manual steps, see [Python Package Release Guide](https://feathr-ai.github.io/feathr/dev_guide/python_package_release.html)
 
 ## Updating docker image for API and Registry
+
 The automated workflow should take care of this as well, you can check under [actions](https://github.com/feathr-ai/feathr/actions/workflows/docker-publish.yml) to see the triggered run and results. For manual steps, see [Feathr Registry docker image](https://feathr-ai.github.io/feathr/dev_guide/build-and-push-feathr-registry-docker-image.html)
 
 ## Release Maven
+
 The automated workflow should take of this too, you can check under [actions](https://github.com/feathr-ai/feathr/blob/main/.github/workflows/publish-to-maven.yml) to see the triggered run and results. For manual steps, see [Feathr Developer Guide for publishing to maven](https://feathr-ai.github.io/feathr/dev_guide/publish_to_maven.html)
 
 ## Testing
+
 Run one of the sample [notebook](https://github.com/feathr-ai/feathr/blob/main/docs/samples/azure_synapse/product_recommendation_demo.ipynb) as it uses the latest package from Maven and PyPi.
 
 ## Announcement