OCI Amazon S3 Compatibility API

Content

My Elasticsearch7.10.0 is running in OCI OKE (Kubernetes running in Oracle Cloud). I want to setup Elasticsearch backup snapshot with OCI Object store using OCI Amazon S3 Compatibility API. Added repository-s3 plugin and configured ACCESS_KEY and SECRET_KEY in the PODs. While repository, I am getting "s_s_l_peer_unverified_exception"

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Code Snippet

curl -u "elastic:$PASSWORD" -k -X PUT "https://elasticsearch-es-http:9200/_snapshot/s3_repository" -H 'Content-Type: application/json' -d'
{
  "type": "s3",
  "settings": {
    "client": "default",
    "region": "ap-sydney-1",
    "base_path": "elastic",
    "endpoint": "<namespace>.compat.objectstorage.ap-sydney-1.oraclecloud.com",
    "bucket": "es-backup"    
  }
}

response:
{
  "error" : {
    "root_cause" : [
      {
        "type" : "repository_verification_exception",
        "reason" : "[s3-repository] path  is not accessible on master node"
      }