Updates README to reflect strong password requirements for admin user (…

…#151)

* Updates README to reflect strong password requirements for admin user

Signed-off-by: Darshit Chanpura <[email protected]>

* Applies PR feedback

Signed-off-by: Darshit Chanpura <[email protected]>

---------

Signed-off-by: Darshit Chanpura <[email protected]>

README.md

@@ -1,7 +1,16 @@
 <img src="https://opensearch.org/assets/brand/SVG/Logo/opensearch_logo_default.svg" height="64px"/>
 
-- [OpenSearch Project Ansible-Playbook](#helm-charts)
-- [OpenSearch Installation with Dashboards](opensearch-installation-with-dashboards)
+- [OpenSearch Project Ansible-Playbook](#opensearch-project-ansible-playbook)
+- [Version and Branching](#version-and-branching)
+- [OpenSearch Installation with Dashboards](#opensearch-installation-with-dashboards)
+  - [Prerequisite](#prerequisite)
+  - [Configure](#configure)
+    - [Multi-node Installation](#multi-node-installation)
+    - [Single Node Installation](#single-node-installation)
+  - [Install](#install)
+  - [OpenID authentification](#openid-authentification)
+  - [Custom configuration files](#custom-configuration-files)
+  - [IaC (Infrastructure-as-Code)](#iac-infrastructure-as-code)
 - [Contributing](#contributing)
 - [Getting Help](#getting-help)
 - [Code of Conduct](#code-of-conduct)
@@ -95,17 +104,19 @@ cluster_type: single-node
 
 
     # Deploy with ansible playbook - run the playbook as root
-    ansible-playbook -i inventories/opensearch/hosts opensearch.yml --extra-vars "admin_password=Test@123 kibanaserver_password=Test@6789 logstash_password=Test@456"
+    ansible-playbook -i inventories/opensearch/hosts opensearch.yml --extra-vars "admin_password=myStrongPassword@123! kibanaserver_password=Test@6789 logstash_password=Test@456"
 
 You should set the reserved users(`admin`, `kibanaserver`, and `logstash`) password using `admin_password`, `kibanaserver_password`, and `logstash_password` variables.
 
+**Note**: Starting OpenSearch 2.12, a strong password is required for `admin` user, i.e. `myStrongPassword123!`. The cluster will fail to start with a weak password (i.e. admin) or no password.
+
 If you define your own internal users (in addition to the reserved `admin`, `kibanaserver`, and `logstash`) in custom configuration
 files, then passwords to them should be set via variables on the principle of `<username>_password`
 
 It will install and configure the opensearch. Once the deployment completed, you can access the opensearch Dashboards with user `admin` and password which you provided for variable `admin_password`.
 
     # Deploy with ansible playbook - run the playbook as non-root user which have sudo privileges,
-    ansible-playbook -i inventories/opensearch/hosts opensearch.yml --extra-vars "admin_password=Test@123 kibanaserver_password=Test@6789 logstash_password=Test@456" --become
+    ansible-playbook -i inventories/opensearch/hosts opensearch.yml --extra-vars "admin_password=myStrongPassword@123! kibanaserver_password=Test@6789 logstash_password=Test@456" --become
 
 **Note**: Change the user details in `ansible_user` parameter in `inventories/opensearch/hosts`  inventory file.