Host provision - bootstrapping actions done as customeradmin

[jcnars]

Ansible user creation and configuring ssh equivalence for the created user between the control node and DB hosts.

Successful validation: https://gist.github.com/jcnars/ff9d76574c9db4028a683faf0db6f8b1

Once this PR is reviewed and merged, will be using the same branch to submit other host provisioning actions
(typically, those may no longer need the customeradmin)

[jcnars]

The inventory file creation has been avoided.

More structure introduced that will lend well into the next stage of introducing the core logic of host provisioning, like LVM, RHEL subscription, etc.

https://gist.github.com/jcnars/6858344c22cef0d94b851a17de68f1c8 contains the successful run of the following:

✔ ~/050521-mntrl-instlln/bms-toolkit [host-provision L|✚ 2…19] 
21:47 $ ./host-provision.sh --comma-separated-dbhosts 172.16.30.1  --instance-ssh-user ansible10
Command used:
./host-provision.sh --comma-separated-dbhosts 172.16.30.1 --instance-ssh-user ansible10

Running with parameters from command line or environment variables:

INSTANCE_SSH_USER=ansible10
INVENTORY_FILE=172.16.30.1,
ORA_CS_HOSTS=172.16.30.1

Found Ansible at /usr/bin/ansible-playbook

Running Ansible playbook: /usr/bin/ansible-playbook -i 172.16.30.1,   host-provision.yml

PLAY [Create private public key pair locally] **********************************************************************************************************************************

TASK [Gathering Facts] ************

[mfielding]

I thought I put in a coment about this, but now can't find it. Apologies if it's duplicated.

In terms of group vars, I'd prefer if we don't have hostprovision in the name, and instead have the ability to reuse them across multiple parts of the code, now or in the future.

A suggestion for naming:
instance_ssh_user
firsttime_connect_user
control_node_key_file

[jcnars]

Got it, will do

[jcnars]

All of the suggestions here have been incorporated and tested successfully.
https://gist.github.com/jcnars/d0e4887c736ddbd3dcc5c9a26d4d24db

Pls check if it looks good.

Thanks

[mfielding]

Is there a way to dereference the variable so that a user will see "Enter customeradmin password"

[jcnars]

There may be, but first glance, extrapolating this variable is introducing complexity that we can do away.