Support tearing down the network

[ldesrosi]

It would be good if the scripts could also support the cleanup of the network. Particularly interesting for CI/CD use cases. Ideally for both Docker and IBM Blockchain Platform.

[sstone1]

The standard Ansible way for this is to have a state parameter, and perform the right action based on the current state and the desired state (e.g. present, absent, stopped).

[ldesrosi]

Correct. However, this has to be added to the playbook and needs to make its way to the tasks.
I am not sure if we can just pass the state down... I suspect we may need new tasks to deal with the deletion.

Something like:

      - &Org2
        msp:
          id: "Org2MSP"
          admin:
            identity: "org2Admin"
            secret: "org2Adminpw"
          ibp:
            display_name: "Org2 MSP"
          state: absent

which results in the deletion of the MSP and all underlying infra? (CA, Peers, etc...)?

[sstone1]

@ldesrosi yep, that's what I was thinking of. I think we need the ability to have it fine grained as well, so users can delete individual components if they want to.

[sstone1]

The PR #69 adds a top-level state property that allows a user to teardown the entire network. We need to expand this so that the state property is available on:

• Individual organizations
• Individual components (CAs, peers, orderers)

It may not make sense to offer a state on a channel, as these cannot be removed. The same applies for smart contracts, as these cannot be undeployed.