VNF Component in Tacker

VNF Component in Tacker

This section will cover how to deploy vnf component in Tacker with the examples of how to write VNF descriptors.

Sample TOSCA with vnfc

The following example shows vnfc resource using TOSCA template. The target (VDU1) of the ‘firewall_vnfc’ in this example need to be described firstly like other TOSCA templates in Tacker.

      type: tosca.nodes.nfv.VNFC.Tacker
        - host: VDU1

Every vnfc node must be of type ‘tosca.nodes.nfv.VNFC.Tacker’. It takes two parameters:

  1. requirements: This node will accept list of hosts on which VNFC has to be installed.
  2. interfaces: This node will accept the absolute path of shell script to be run on the VDUs. This shell script should reside in the machine where tacker server is running.

How to setup environment

To make use of VNFC in Tacker, we have to upload the image to the glance in which heat-config and heat-config agents are installed. The installation steps can be referred here. The tool ‘tools/vnfc/’ can be used to generate such a kind of image.

Currently VNFC feature works by using heat software config which makes use of heat API.

So the glance images which has heat-config agents installed are only to be passed to VDU.

Known Limitations

  1. Only one VNFC is supported for one VDU. Multiple VNFC per VDU will be introduced in future.
  2. The shell script for vnfc has to be placed in the machine where tacker server is running.
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