====== [HOWTO] Update the Centos Template ======

^  Documentation  ^|
^Name:| [HOWTO] Update the Centos Template |
^Description:| Standard steps to update the template |
^Modification date :|15/11/2018|
^Owner:|dodger@ciberterminal.net|
^Notify changes to:|Owner |
^Tags:| |
^Input parameters:| ::: |


====== Concepts ======

The steps are:
  - Update (OS) tmpl_v001
  - Clone tmpl_v001 to tmpl_v002
  - install ''cloud-init'' in tmpl_v002
  - Poweroff tmpl_v002
  - Distribute tmpl_v002 to all nutanix clusters

In graphic:\\
<graphviz>
digraph {
        subgraph cluster_0{
                label="Upgrade process";
                tmpl_v001 [shape=rect];
                tmpl_v001_UPDATED [shape=rect,color=darkolivegreen1,style=filled,label="tmpl_v001 upgraded"];
                tmpl_v002 [shape=rect,color=darkolivegreen1,style=filled];
                upgrade_OS [shape=octagon,color=grey,style=filled];
                clone [shape=octagon,color=grey,style=filled];
                drop [shape=octagon,color=grey,style=filled,label="Drop tmpl_v002"];
                tmpl_v001->upgrade_OS;
                upgrade_OS->tmpl_v001_UPDATED;
                tmpl_v001_UPDATED->drop->clone;
                clone->tmpl_v002;
        }
        subgraph cluster_1{ 
                label="Distribution";
                nuclu [shape=box3d];
                datacenter_01 [shape=box3d];
                nuvcc [shape=box3d];
                nuother [shape=box3d];
                tmpl_v002 -> nuclu;
                tmpl_v002 -> datacenter_01;
                tmpl_v002 -> nuvcc;
                tmpl_v002 -> nuother;
        }
}

</graphviz>