Migration from OpenShift Container Platform 3 to 4 overview

OpenShift Container Platform 4 clusters are different from OpenShift Container Platform 3 clusters. OpenShift Container Platform 4 clusters contain new technologies and functionality that result in a cluster that is self-managing, flexible, and automated. To learn more about migrating from OpenShift Container Platform 3 to 4 see About migrating from OpenShift Container Platform 3 to 4.

Differences between OpenShift Container Platform 3 and 4

Before migrating from OpenShift Container Platform 3 to 4, you can check differences between OpenShift Container Platform 3 and 4. Review the following information:

• Architecture
• Installation and update
• Storage, network, security, and monitoring considerations

Planning network considerations

Before migrating from OpenShift Container Platform 3 to 4, review the differences between OpenShift Container Platform 3 and 4 for information about the following areas:

• DNS considerations

  • Isolating the DNS domain of the target cluster from the clients.
  • Setting up the target cluster to accept the source DNS domain.