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Follow the steps in following link to setup Rancher and k8s cluster:
https://docs.onap.readthedocs.ioorg/en/latestbeijing/submodules/oom.git/docs/oom_setup_kubernetes_rancher.htmlPlease note the Rancher, Helm, Kubernetes versions have changed for Casablanca release. So in case you are pulling Beijing release use the scripts ( openstack-rancher.sh, openstack-k8s-node.sh etc) from the oom/docs source directory.
Create a new VM from a ubuntu 16.04 cloud image with 6GB RAM, 5vCPUs, 300GB storage to host the docker registry
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