Migrate nodePrep and masterPrep to playbooks

[brusMX]

Let's try to do it all in Ansible Playbooks

[brusMX]

Ok, I have migrated the nodePrep in commit Id 6562cb6 but the problem now is that I need to be able to deploy ansible scripts into the VMs. Which basically would mean that I need:

1. Solve Issue Configure NAT Propely #11 so I can NAT and SSH into the master and so on, or
2. Have the bastion node setup add_host bastion VM so ansible can use it #16 and add all the other VMs to some groups so I can run the playbooks on them.

[zikalino]

About #11 I asked @haroldwongms and he said that the plan is to remove NAT on purpose for security reasons.
Perhaps we should just enable NAT for bastion node?

Alternatively, bastion node could be in the same vnet as other nodes so we could just use local addresses without NAT.

Pls check this example:

This script is to create list of hosts dynamically:
https://github.com/Azure-Samples/ansible-playbooks/blob/master/vmss/get-hosts-tasks.yml

And this example is using it:

https://github.com/Azure-Samples/ansible-playbooks/blob/master/vmss/vmss-setup-deploy.yml

[zikalino]

actually entire VMSS sample may be useful:

https://github.com/Azure-Samples/ansible-playbooks/tree/master/vmss

Maybe as a next step we could use scaleset(s) to create nodes.

[zikalino]

I have created issue #19 and suggested the idea that we could have a separate script to prepare images. Then later we could just refer these images in create.yml so additional preparation step and NAT wouldn't be necessary.

[brusMX]

The only concern I have with VMSS is that there was an issue on provisioning disks. You could not select a single VM to deploy one disk, it was all VMs have a disk, or none.
I know the PG worked to alleviate this situation, but I don’t know if the work has been finished.
Now, maybe if we setup a GlusterFS cluster on the side, then this problem would be solved and the disk provisioning would be handled by Gluster.