Live will provide you with fully valid certificates signed by Let's Encrypt CA.
This deployment will provide certificate management for all namespaces in your cluster. You need elevated (admin) privileges to deploy it.
If you have this repository checked out, deploy it like:
oc create -fdeploy/letsencrypt-live/cluster-wide/{clusterrole,serviceaccount,imagestream,deployment}.yaml
oc adm policy add-cluster-role-to-user openshift-acme -z openshift-acme
If you want to deploy it directly from GitHub use:
oc create -fhttps://raw.githubusercontent.com/tnozicka/openshift-acme/master/deploy/letsencrypt-live/cluster-wide/{clusterrole,serviceaccount,imagestream,deployment}.yaml
oc adm policy add-cluster-role-to-user openshift-acme -z openshift-acme