[BUG]The ECS task or the Opensearch dashboards' docker-compose.yml file doesn't recognize SAML configs

[madhankb]

Describe the bug
When connecting a standalone OpenSearch dashboards with the SAML authenticated managed service domain, the SAML configurations are not accepted in the ECS task or in the docker-compose.yml file.

To Reproduce
Steps to reproduce the behavior:

1. Create a OpenSearch dashboards ECS task or docker-compose.yml file like below

version: '3'
services:
  opensearch-dashboards:
    image: opensearchproject/opensearch-dashboards:2.5.0
    container_name: opensearch-dashboards
    ports:
      - 5601:5601
    expose:
      - "5601"
    environment:
      opensearch.hosts: '["https://vpc-saml-2-3cue34.ap-south-1.es.amazonaws.com"]'
      opensearch.username: 'xxx'
      opensearch.password: 'xxxx'
      opensearch_security.auth.type: "saml"
      server.xsrf.allowlist: ["/_opendistro/_security/saml/acs"]
    networks:
      - opensearch-net
networks:
  opensearch-net:

Expected behavior
When the standalone OSD endpoint is hit, it has to go to SAML application instead it goes to the dashboards home page and requires the customer to enter basic http username and password.

[prudhvigodithi]

[Untriage]
Hey @madhankb please check and try with the following examples for connecting OSD with SAML
https://opensearch.org/docs/latest/security/configuration/multi-auth/
https://opensearch.org/docs/latest/security/authentication-backends/saml/
https://opster.com/guides/opensearch/opensearch-security/how-to-set-up-single-sign-on-using-openid-connect/
https://www.youtube.com/watch?v=liJO_jOiIF8

[madhankb]

I have tried all and it is not working!

[madhankb]

Can we triage this and get this fixed please?