CentOS 7.x Rocks cluster 7.0 Build compute server

The compute node is setup via Pxeboot. It should be connected only to private network and then booted via network.

Before doing network boot on compute node, on master server, run below command:
```
insert-ethers
```
On the ncurses based popup Choose Compute, it would display: 'insert-ethers is waiting for new compute nodes.'
After this boot the compute node via network.
When the frontend machine receives the DHCP request from the compute node, It will display, "Discovered a new appliance with MAC"
insert-ethers has discovered a compute node. The "( )" next to compute-0-0 indicates the node has not yet requested a kickstart file. You will see this type of output for each compute node that is successfully identified by insert-ethers.
```
00:13:72:ba:c8:df       Compute-0-0         ()
```
Kickstart files are retrieved via HTTPS. If there was an error during the transmission, the error code will be visible instead of (*).
```
00:13:72:ba:c8:df       Compute-0-0         (*)
```
The compute node has successfully requested a kickstart file from the frontend. If there are no more compute nodes, you may now quit insert-ethers by pressing F8.
Compute node will intall automatically.
After successful installation of compute node, it will restart.
We can list of hosts which are part of rocks cluster using
```
rocks list host
```

Ref:

Anonymous