The Computation Movement Enactor (CME) is the DITAS component in charge of coordinating the movement of VDCs across different clusters. It is intended to be run inside a VDM and to be automatically deployed by the DITAS Deployment Engine

The CME is written in golang and go version 1.13 is required. To facilitate building and executing a Dockerfile is provided. It can be built with docker build . -t ditas/computation-movement-enactor A Jenkins file is provided as well to integrate into the DITAS CI environment.

The CME expects is configured by a file named cme.properties that must be mounted as a volume in the container path /etc/ditas. The DITAS Deployment Engine will do it automatically when deploying this component inside a VDM. The properties that can be configured are:

• port: The port in which the CME will listen for requests. By default it's 8080
• tombstone.use_ssl: Set this property to true to communicate with the Tombstone component by https. Otherwise, it will try to communicate by http. By default it's false
• deployment_engine.url: This mandatory property holds the base URL of the DITAS Deployment Engine
• blueprint.id: This mandatory property holds the abstract blueprint identifier of the VDM that's holding the CME
• sign.key: This mandatory property holds the shared secret key between the CME and the Tombstone component of each of the VDCs it manages.