The Client
Luminus is the second-largest electricity generator and energy provider in Belgium, managing power plants and wind farms while securing external energy sources to ensure a reliable power supply for customers.
As a public-facing utility company handling large volumes of customer data, Luminus must comply with strict governance, auditability, and data retention standards – especially when it comes to their operational and application log data.
The Challenge
Before the OpenSearch project, Luminus was facing operational and compliance risks tied to their outdated, on-premise log search solution. Key challenges included:
- Limited Scalability & Resiliency
Their legacy system couldn’t keep up with the growth of data, particularly as Luminus’ customer base continued to grow
- Insufficient Governance & Auditability
Their logging system lacked granular access control and long-term storage capabilities
- Fragmented Access to Log Data
Multiple teams had too much access — anyone with the right permissions could view all log data, with no practical way to limit or segregate visibility
Our Approach
Assessment & Discovery
- Ran collaborative sessions with Luminus teams to map existing logging workflows
- Identified core technical and compliance challenges in their on-prem setup
Architecture Planning
- Designed a resilient, multi-AZ OpenSearch cluster built for scale and high availability
- Prioritised governance and lifecycle-aware storage from the outset
Active Directory Integration
- Integrated Azure Active Directory for secure, centralised access management
- Enabled custom role-based access aligned to organisational needs
Compliance-First Mindset
- Built long-term data retention and auditability into the platform design
- Structured domain-level access to reflect application and team boundaries
What is Opensearch?
OpenSearch is an open-source search and analytics suite used for real-time application monitoring, log analytics, and website search. It offers powerful dashboards and fast access to vast volumes of data.
AWS OpenSearch Service is the fully managed version offered by AWS, simplifying deployment, scaling, and management of OpenSearch clusters while providing enterprise-grade security and availability.
Our Solution
Our tailored implementation of AWS OpenSearch addressed Luminus’ immediate and long-term needs.
Key elements of the solution included:
We deployed OpenSearch clusters across three AWS Availability Zones, each containing multiple OpenSearch nodes. This ensures high availability and fault tolerance for mission-critical log data.
Using data nodes, ultrawarm nodes, and cold storage, logs are automatically moved through lifecycle stages depending on their age. This enables:
Fast access to recent logs.
Cost-effective retention of older logs.
Seamless scaling as log volumes grow.
We integrated Azure AD with AWS OpenSearch Dashboards, enabling:
Centralised identity management.
Custom role-based access control to log data.
Full auditability of user interactions.
OpenSearch domains were segmented by application vertical, allowing Luminus to control access on a per-team or per-environment basis, ensuring that only the right people access the right data.
The OpenSearch platform was designed to aggregate logs from both on-premise systems and AWS workloads, enabling a unified view of operations for observability, security, and compliance.
Our Results
Our collaboration delivered a robust and scalable log analytics platform that continues to support Luminus as their Cloud journey evolves.
- Improved scalability to support growing AWS adoption
- Zero-downtime deployments using Blue/Green OpenSearch upgrades
- Long-term retention with cost-effective cold storage tiers
- Stronger security posture with Azure AD integration and role-based access
- Compliance-ready audit trails aligned to governance requirements
Ready to transform your Cloud infrastructure?
Cloud solutions, simplified.
Let's discuss how we can help you achieve your Cloud goals with our expertise and proven methodology.
Luminus Observability: Simplifying Search with AWS Opensearch
How Cloud Elemental helped Luminus transition from an outdated, on-premise search tool to a scalable, Cloud-based solution for log retention, security, and compliance.
The Client
Luminus is the second-largest electricity generator and energy provider in Belgium, managing power plants and wind farms while securing external energy sources to ensure a reliable power supply for customers.
As a public-facing utility company handling large volumes of customer data, Luminus must comply with strict governance, auditability, and data retention standards – especially when it comes to their operational and application log data.
The Challenge
Before the OpenSearch project, Luminus was facing operational and compliance risks tied to their outdated, on-premise log search solution. Key challenges included:
- Limited Scalability & Resiliency
Their legacy system couldn’t keep up with the growth of data, particularly as Luminus’ customer base continued to grow
- Insufficient Governance & Auditability
Their logging system lacked granular access control and long-term storage capabilities
- Lack of controlled access to Log Data
Multiple teams had too much access — anyone with the right permissions could view all log data, with no practical way to limit or segregate visibility
Our Approach
Assessment & Discovery
- Ran collaborative sessions with Luminus teams to map existing logging workflows
- Identified core technical and compliance challenges in their on-prem setup
Architecture Planning
- Designed a resilient, multi-AZ OpenSearch cluster built for scale and high availability
- Prioritised governance and lifecycle-aware storage from the outset
Active Directory Integration
- Integrated Azure Active Directory for secure, centralised access management
- Enabled custom role-based access aligned to organisational needs
Compliance-first Mindset
- Built long-term data retention and auditability into the platform design
- Structured domain-level access to reflect application and team boundaries
What is Opensearch?
OpenSearch is an open-source search and analytics suite used for real-time application monitoring, log analytics, and website search. It offers powerful dashboards and fast access to vast volumes of data.
AWS OpenSearch Service is the fully managed version offered by AWS, simplifying deployment, scaling, and management of OpenSearch clusters while providing enterprise-grade security and availability.
Our Solution
Our tailored implementation of AWS OpenSearch addressed Luminus’ immediate and long-term needs.
Key elements of the solution included:
We deployed OpenSearch clusters across three AWS Availability Zones, each containing multiple OpenSearch nodes. This ensures high availability and fault tolerance for mission-critical log data.
Using data nodes, ultrawarm nodes, and cold storage, logs are automatically moved through lifecycle stages depending on their age. This enables:
Fast access to recent logs.
Cost-effective retention of older logs.
Seamless scaling as log volumes grow.
We integrated Azure AD with AWS OpenSearch Dashboards, enabling:
Centralised identity management.
Custom role-based access control to log data.
Full auditability of user interactions.
OpenSearch domains were segmented by application vertical, allowing Luminus to control access on a per-team or per-environment basis, ensuring that only the right people access the right data.
The OpenSearch platform was designed to aggregate logs from both on-premise systems and AWS workloads, enabling a unified view of operations for observability, security, and compliance.
Our Results
Our collaboration delivered a robust and scalable log analytics platform that continues to support Luminus as their Cloud journey evolves.
- Improved scalability to support growing AWS adoption
- Zero-downtime deployments using Blue/Green OpenSearch upgrades
- Long-term retention with cost-effective cold storage tiers
- Stronger security posture with Azure AD integration and role-based access
- Compliance-ready audit trails aligned to governance requirements
Ready to transform your Cloud Infrastructure?
Let’s discuss how we can help you achieve your Cloud goals with our expertise and proven methodology.
