[BUG] OIDC pemtrustedcas_filepath: /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem has no effect

[paulmossman]

What is the bug?

When I configure pemtrustedcas_filepath: /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem in the config.yml section of the securityconfig file Secret then OIDC SSO fails. i.e. After successfully logging in and being redirected back to OpenSearch, Dashboards displays 401 Unauthorized.

According to the documentation the full file path can be used. It does not have to be relative to the config directory.

If I configure pemtrustedcas_content with the contents of /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem then OIDC SSO works.

How can one reproduce the bug?

Configure OIDC SSO using pemtrustedcas_filepath: /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem, neither pemtrustedcas_filepath with a relative file path nor pemtrustedcas_content.

What is the expected behavior?

OIDC SSO login should be successful.

What is your host/environment?

OpenSearch: v2.18.0
OpenSearch operator: v2.7.0
Kubernetes: v1.31.4+k3s1

Do you have any screenshots?

Do you have any additional context?

See also: https://forum.opensearch.org/t/oidc-pemtrustedcas-filepath-etc-pki-ca-trust-extracted-pem-tls-ca-bundle-pem-has-no-effect/22558