Lift-and-Shift Migration with Compliance Constraints
A financial services company is migrating its on-premises data center to Alibaba Cloud. The data center hosts 200 virtual machines (VMs) running a mix of Windows and Linux, with 50TB of data. The company has strict compliance requirements: data must be encrypted at rest and in transit, and all access must be logged and auditable. They also require that data does not leave the country (China). The migration window is 4 weeks, and they want to minimize downtime. The company has limited cloud experience and wants to use a lift-and-shift approach. They are considering using Alibaba Cloud's Server Migration Center (SMC) for migration. The on-premises network has a 1Gbps connection to the internet, but the available bandwidth for migration is limited to 200Mbps during business hours and 500Mbps during off-hours.
1. What migration strategy and tools would you recommend to meet the compliance requirements and minimize downtime?
Read the worked answer
Use Alibaba Cloud Server Migration Center (SMC) for lift-and-shift migration of VMs. SMC supports incremental migration, which minimizes downtime by syncing data while the source is running and then doing a final cutover. For compliance, ensure that the destination ECS instances use encrypted disks (using Alibaba Cloud KMS), and enable encryption in transit by using SSL/TLS for all connections. Use Alibaba Cloud's ActionTrail to log all API access and configure Log Service to collect and audit access logs. Deploy all resources in the China region to meet data residency. For the 50TB data transfer, given the bandwidth constraints, plan the migration in waves, prioritizing critical systems. Use compression and deduplication to reduce data volume. Schedule bulk data transfer during off-hours to utilize higher bandwidth. Consider using Alibaba Cloud's Data Transmission Service (DTS) for database migration to ensure consistency.
2. How would you address the limited cloud experience of the team and ensure a smooth migration?
Read the worked answer
Provide training on Alibaba Cloud fundamentals and specific services used (ECS, VPC, SMC, KMS, ActionTrail). Engage Alibaba Cloud's professional services or a certified partner for hands-on assistance during the migration. Use infrastructure as code (e.g., Terraform) to automate provisioning and reduce manual errors. Implement a pilot migration with a small subset of non-critical VMs to validate the process and build confidence. Create a detailed runbook and rollback plan. Set up monitoring and alerting using CloudMonitor to proactively detect issues. Conduct regular review meetings to track progress and address challenges.