Introduction
At Linnovate, we understand that the cloud landscape is ever-evolving, and sometimes, a strategic shift is necessary for optimal performance and growth. We recently embarked on a significant migration journey, transitioning from Azure Kubernetes Service (AKS) to Google Kubernetes Engine (GKE). This move, while intricate, was pivotal for our organization’s needs. In this blog post, we’re excited to share the insights and strategies that made our migration process both successful and enlightening.
The Migration Strategy
The migration from AKS to GKE is far from a straightforward process. It requires meticulous planning and execution, tailored to specific applications and configurations. Here’s a breakdown of the essential steps we took in our migration journey:
Infrastructure Alignment using IaC: Leveraging Infrastructure as Code, we set up scalable Kubernetes services in GCP, ensuring that networking configurations, firewall rules, VPC settings, and load balancers were optimally configured for the GKE environment.
Data Migration Excellence: We deployed database servers in GCP’s private subnets using IaC. A Bastion host was crucial in backing up data from Azure and restoring it to GCP databases.
Persistent Storage Migration Challenges: Migrating large Persistent Volumes (PVs) was challenging. We efficiently moved data from Azure Disk to Google Cloud Persistent Disks using a jump server, ensuring minimal disruption.
Secrets and Configuration Management: Our team meticulously migrated secrets and configuration files, updating Kubernetes ConfigMaps and Secrets with new credentials and configurations.
CI/CD Pipeline Adjustments: Integrating changes into our GitLab CI/CD pipelines was essential to align with GKE cluster deployments.
Deployment and Monitoring: Post-migration, we deployed applications on the GKE cluster and established robust monitoring and logging systems for enhanced performance visibility.
Post-Migration Validation: We conducted thorough validations to ensure smooth application operation on GKE.
DNS Switch Over: A crucial step was updating DNS records to reflect the new GKE environment.
Final Verifications and Minimal Downtime: Post-switch over, we conducted additional verifications, achieving minimal downtime of just a few minutes.
Conclusion
Our journey from AKS to GKE was comprehensive, involving detailed planning and execution across various facets, from infrastructure and data migration to persistent storage challenges and CI/CD pipeline modifications. The result was a seamless transition with minimal downtime, exemplifying Linnovate’s commitment to staying ahead in the cloud technology realm.
Author: Andrei Ivanouski