1.x only have 1.x opensearch/dashboards apps (#64)

Signed-off-by: Peter Zhu <[email protected]>

README.md

@@ -13,6 +13,16 @@
 
 A community repository for Ansible Playbook of OpenSearch Project.
 
+## Version and Branching
+As of now, this helm-charts repository maintains 3 branches:
+* _main_ (Version is 2.x.x for both `os_version` and `os_dashboards_version` in `inventories/opensearch/group_vars/all/all.yml`)
+* _1.x_ (Version is 1.x.x for both `os_version` and `os_dashboards_version` in `inventories/opensearch/group_vars/all/all.yml`)
+<br>
+
+Contributors should choose the corresponding branch(es) when commiting their change(s):
+* If you have a change for a specific version, only open PR to specific branch
+* If you have a change for all available versions, first open a PR on `main`, then open a backport PR with `[backport 1.x]` in the title, with label `backport 1.x`, etc.
+
 ## OpenSearch Installation with Dashboards
 
 This ansible playbook supports the following,

inventories/opensearch/group_vars/all/all.yml

@@ -8,14 +8,10 @@ os_download_url: https://artifacts.opensearch.org/releases/bundle/opensearch
 # opensearch version
 # 1.x Latest Version
 os_version: "1.3.2"
-# 2.x Latest Version
-# os_version: "2.0.0-rc1"
 
 # opensearch dashboards version
 # 1.x Latest Version
 os_dashboards_version: "1.3.2"
-# 2.x Latest Version
-# os_dashboards_version: "2.0.0-rc1"
 
 # Configure hostnames for opensearch nodes
 # It is required to configure SSL