If you are using a fixed image for your workload, which CANNOT be modified, then the Charm has to be allocated not in the workload (Proxy Charm). There are two kinds of Charms, and at this point you have to decide which one you need, and that depends on the nature of your workload. The operations code is call “Charm”, and it can handle the lifecycle, configuration, integration, and actions/primitives in your workloads. In the VNFD you will find metadata, which is declarative data specified in the YAML file, and code that takes care of the operations related to a VNF. The main mechanism to achieve this in OSM is to build a Charm and include it in the descriptor. This allows the exposed services inside the VNF to be automatically initialized right after the VNF instantiation.
The objective of this section is to provide the guidelines to include all necessary elements in the VNF Package.
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