OpenShift 3.x vs 4.x and Migration from 3.x to 4.x
One of the biggest differences between OpenShift 3 and 4 is how OpenShift 4 clusters operate using immutable and completely automated infrastructure enabled by RHEL CoreOS based operating system and automation.
In 4.x everything is done by operators and your masters are different images then what you know in 3.x, More so there are no infra node by deployment , you need to tag and adjust compute nodes if you want infra nodes in 4.x
There are two ways to install/setup openshift cluster
1. User Provisioned Infrastructure
2. Installer Provisioned Infrastructure
How to migrate 3.x to 4.x
There are tools available to migrate openshift 3.x to 4.x, Appranix is one of the tool to Migrate from OpenShift 3 to OpenShift 4 Clusters
Appranix is a technology and business partner of Red Hat. you can work closely with Red Hat to support the ease of migration of OpenShift 3 cluster resources to Open Shift 4 using a service created on top of our Kubernetes cluster. OpenShift 3 customers can use Appranix’s Site Reliability Automation’s fully automated capabilities to backup and recover all the 3 cluster resources to OpenShift 4 with a few clicks.
Advantages of Using Appranix for OpenShift 4.x Migration
- Simple to get started with a SaaS-based migration solution. There is no infrastructure to setup. There is no configuration or separate management solution to set up for migration purposes.
- Appranix migration solution is very scalable so large cluster migration will be painless
- All the complex OpenShift 3 cluster configurations are automatically captured and migrated over to OpenShift 4, drastically simplifying operations
- Test your on-prem OpenShift 3 based applications on OpenShift 4 running on Azure
- Migrate all your RBAC settings along with your cluster resources.
- Migrate specific projects or all the projects together to the new OpenShift 4 clusters.
Happy learning….
Source : self learning and my friend google. :)
