You need at least 5g of ram. If you do not provide enough ram OpenShift containers may be stop during kafka pods creations.
At least 2 cpu should be presents. However some pods may be stuck in pending state because not enough millicpu are available.
In the following command the namespace "developement" is used. You are free to change it as you want to target a present namespace.
just run this command from the shell :)
oc apply -f https://github.com/strimzi/strimzi-kafka-operator/releases/download/0.11.4/strimzi-cluster-operator-0.11.4.yaml -n developement &&
oc adm policy add-cluster-role-to-user strimzi-cluster-operator-namespaced --serviceaccount strimzi-cluster-operator -n developement &&
oc adm policy add-cluster-role-to-user strimzi-entity-operator --serviceaccount strimzi-cluster-operator -n developement &&
oc adm policy add-cluster-role-to-user strimzi-topic-operator --serviceaccount strimzi-cluster-operator -n developement &&
oc apply -f https://raw.githubusercontent.com/strimzi/strimzi-kafka-operator/0.11.4/examples/kafka/kafka-persistent-single.yaml -n developement