Section/Appendix: Mapping Service Template data to OVF Envelope Elements

An ovfRef type DeploymentArtifact should contain a sub-element <reference> referring to an OVF package. If all the virtual resources in the referenced OVF Package are used to instantiate a node only, then a <reference> element is sufficient to supply all information needed for instantiating the node. However, an OVF package may contain some other virtual system elements that are used for instantiating other nodes specified in TOSCA Service Template. For example, a web service is supported by an appserver and a DB server. Two VM images are used to deploy these two servers, one image installing Linux OS and Tomcat and the other one installing Linux OS and MySQL. These two images are described by a VirtualSystemCollection element in an OVF descriptor file and included in one OVF package. Developers define two node types in TOSCA for the appserver and DB server respectively. But these two node types reference the same OVF package as the deployment artifact. In this case, element < VirtualArtifacts > should be given in the body of DeploymentArtifact. Developers should give the ID of VirtualSystem or VirtualSystemCollection in <VirtualArtifacts> to specify images for deploying the node. When the OVF package is imported, only the virtual systems that are included in <VirtualArtifacts> are deployed. An example is given below. <NodeTypes> <NodeType id="appServer" name="My Application Server"> <DeploymentArtifacts> <DeploymentArtifact name=" VM image with Linux and Tomcat " type="http://docs.oasis-open.org/tosca/ns/2011/12/deploymentArtifacts/ovfRef"> <Reference> http://www.example.com/ovfpackage/ovf_example </Reference> <VirtualArtifacts> <VirtualArtifact>virtualSystem_appserver</VirtualArtifact> <VirtualArtifacts> </DeploymentArtifact> </DeploymentArtifacts> </NodeTypes> <NodeTypes> <NodeType id="dbServer" name="My DB Server"> <DeploymentArtifacts> <DeploymentArtifact name="VM image with Linux and mySQL" type="http://docs.oasis-open.org/tosca/ns/2011/12/deploymentArtifacts/ovfRef"> <Reference> http://www.example.com/ovfpackage/ovf_example </Reference> <VirtualArtifacts> <VirtualArtifact> virtualSystem_dbserver </VirtualArtifact> <VirtualArtifacts> </DeploymentArtifact> </DeploymentArtifacts> </NodeTypes>