Regular Application Support and Migration from RHEL 7.0 to RHEL 8.0

  • Industry: Software & Services (Billing, CRM, OSS, Web Portals)
Address security vulnerabilities and manageability issues caused by mismatched VMware versions across the client's virtual infrastructure.

Engagement Details

  • Project Name: Application Migration from RHEL 7 Hosts to RHEL 8 (Application-Side Complexities)
  • Technology Used: RHEL 7.0/8.0

Business Need

  • Migrate applications from RHEL 7 to RHEL 8 to leverage the latest operating system features, security updates, and performance enhancements.
  • Ensure compatibility and optimal performance of applications during and after the migration.
  • Address application-specific dependencies and compatibility issues with RHEL 8.
  • Achieve a smooth transition with minimal disruption to business operations.

Challenges

  • Comprehensive Migration Plan:
    • Conducted a detailed assessment of all applications to identify potential compatibility issues and dependencies with RHEL 8.
    • Developed a phased migration strategy, beginning with less critical applications to test the new environment before migrating mission-critical ones.
    • Leveraged automation tools and scripts to streamline the migration process and reduce manual efforts.
    • Implemented a thorough testing and validation process to ensure all applications function correctly and perform optimally on RHEL 8.
    • Coordinated with application owners and stakeholders to address specific concerns and ensure a smooth migration.

Solutions

  • Inventory Analysis and Classification: Categorized servers based on compatibility with the target ESXi version and identified unsupported hardware.
  • Legacy Environment Migration: Migrated unsupported servers to a dedicated legacy environment to ensure continuity.
  • Planned Upgrades: Coordinated with server owners to schedule downtime for the necessary upgrades.
  • ESXi and VCSA Upgrades: Upgraded all supported ESXi hosts and vCenter Server Appliance to the desired versions (6.0 U3/6.5 and 6.7).
  • Inventory and Documentation Update: Updated the server inventory and documentation for better reference and control moving forward.

Results

  • Successfully migrated applications from RHEL 7 to RHEL 8 with minimal disruption to business operations.
  • Enhanced overall system performance and security by utilizing the new features and improvements of RHEL 8.
  • Ensured compatibility with application-specific complexities through thorough testing and validation.
  • Streamlined the migration process through effective planning, automation, and stakeholder coordination, leading to a smooth and efficient transition.

Key Takeaways

  • This project showcases our expertise in managing complex application migrations across different operating system versions, ensuring compatibility, security, and performance.
  • Our phased approach and detailed planning effectively addressed the challenges of migrating applications, demonstrating our ability to handle intricate IT transformations.
  • The successful migration to RHEL 8 highlights our capacity to enhance system capabilities while maintaining operational stability and meeting client needs.
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