[v2.12.0] Ensure CI/documentation reflect changes to default admin credentials

[DarshitChanpura]

Background

Previously, when installing the security plugin demo configuration, the cluster was spun up with the default admin credentials, admin:admin. A change was made in main and backported to 2.x for the 2.12.0 release, which now requires an initial admin password to be passed in via the environment variable OPENSEARCH_INITIAL_ADMIN_PASSWORD. This will break some CI/testing that relies on OpenSearch to come up without setting this environment variable. This tracking issue is to ensure compliance with the new changes.

Coming from: opensearch-project/security#3624

Acceptance Criteria

• All documentation references to the old default credentials admin:admin are removed
• Ensure that CI/testing is working with main and 2.x branches

[prudhvigodithi]

[Triage]
The Operator does not run install_demo_configuration.sh and logs the message /usr/share/opensearch/config/opensearch.yml seems to be already configured for Security. Quit.. The operator does security setup for the cluster. However the default username and password is admin:admim, but the user can always change this with Custom Admin User, this feature is already in operator for quite a long time and can change the password during and after the cluster startup.

I have tested with the latest 2.12.0 latest RC using the docker image opensearchstaging/opensearch:2.12.0.9399 and was able to access the cluster without any error and works as expected with Custom Admin User.

Sample test log when changing the password with Custom Admin User

curl https://localhost:9400 -k -u admin:test    
{
  "name" : "pgcluster-masters-0",
  "cluster_name" : "pgcluster",
  "cluster_uuid" : "1yrQzHAJRRGrtrS2GjlxcA",
  "version" : {
    "distribution" : "opensearch",
    "number" : "2.12.0",
    "build_type" : "tar",
    "build_hash" : "a9c03c2d08051dc3f8e5f8c7920473e53d0d2752",
    "build_date" : "2024-02-13T00:07:52.941773788Z",
    "build_snapshot" : false,
    "lucene_version" : "9.9.2",
    "minimum_wire_compatibility_version" : "7.10.0",
    "minimum_index_compatibility_version" : "7.0.0"
  },
  "tagline" : "The OpenSearch Project: https://opensearch.org/"
}

Sample log with default:

curl https://localhost:9400/ -k -u admin:admin
{
  "name" : "pgcluster-masters-0",
  "cluster_name" : "pgcluster",
  "cluster_uuid" : "65WJtBZqRkWbRZKoh2u3mA",
  "version" : {
    "distribution" : "opensearch",
    "number" : "2.12.0",
    "build_type" : "tar",
    "build_hash" : "a9c03c2d08051dc3f8e5f8c7920473e53d0d2752",
    "build_date" : "2024-02-13T00:07:52.941773788Z",
    "build_snapshot" : false,
    "lucene_version" : "9.9.2",
    "minimum_wire_compatibility_version" : "7.10.0",
    "minimum_index_compatibility_version" : "7.0.0"
  },
  "tagline" : "The OpenSearch Project: https://opensearch.org/"
}

Adding @dbason @swoehrl-mw @jochenkressin @pchmielnik @salyh @bbarani @peterzhuamazon

[DarshitChanpura]

@prudhvigodithi Can this issue be marked as closed with "no action needed"?

[prudhvigodithi]

Yes closing this issue as no further action needed.