Methods, computer program products, and systems are presented. The method computer program products, and systems can include, for instance: obtaining, by a container host node, container image configuration data that defines a specified container image configuration, wherein the container host node includes an associated container image repository for storing container images; multicasting, by the container host node, a request for one or more image of first through Nth specified container images to a set of container host nodes; receiving, by the container host node, at least one container image from at least one container host node of the set of container host nodes in response to the multicasting; building, by the container host node, a specified container image according to the specified container image configuration using the at least one container image received by the receiving; and running, by the container host node, the specified container image built by the building to define a runtime container.