Elastic Cloud on Kubernetes (ECK) introduces a new Custom Resource Definition (CRD) called Elastic Stack Configuration Policies, which simplifies managing Elasticsearch configurations across different clusters. This CRD enables users to set and enforce policies for various aspects of the Elastic stack, such as snapshot policies, index lifecycle management (ILM), and cluster settings, ensuring immutable configurations across clusters. The Stack Configuration Policies are particularly beneficial for enforcing consistent backup policies and data retention strategies without manual intervention, utilizing syntax similar to Elasticsearch API but in YAML format. Users can apply these policies across all namespaces or specific namespaces and utilize resource selectors for more targeted enforcement. Once a policy is deleted, its associated configuration is removed from the clusters. This development streamlines the creation of reusable and consistent Elasticsearch clusters, enhancing reliability and efficiency in managing Elasticsearch environments.