This guide provides recommendations and best practices for migrating from OpenShift Container Platform 3.9+ to OpenShift 4.x with the Migration Tookit for Containers (MTC). The recommendations are organized into the following sections:
- Planning: Considerations and strategies to review while planning the migration
- Cluster health checks: Metrics to check before migration
- Pre-migration testing: Testing the migration plan before running the actual migration
- Running the migration: Best practices for running the migration
- Troubleshooting: Common troubleshooting tasks