====== Cloud-init basic knowledge ======

^  Documentation  ^|
^Name:| Cloud-init basic knowledge |
^Description:| Cloud-init basic knowledge  |
^Modification date :|23/05/2018|
^Owner:|dodger@ciberterminal.net|
^Notify changes to:|backOps tuxe's|
^Tags:| |


====== Basic Knowledge ======

All my tests indicate that the script run in this order:
  * Initial config:
    * fqdn
    * hostname
  * upgrade
  * packages
  * runcmd
  * users

Ignored orders:
  * resolv_conf


====== Template creation ======
Install cloud-init in the template:
<code bash>
yum install cloud-init
</code>

Create the image for image service:
<code bash>
nutanix@NTNX-67YVTB2-A-CVM:10.51.4.138:~$ acli image.create TMPL-CentOS7-cloud clone_from_vmdisk=vm:TMPL-CentOS7.1804:scsi.0 image_type=kDiskImage
TMPL-CentOS7-cloud: pending
TMPL-CentOS7-cloud: complete
</code>



====== Sample scripts ======
===== Very simple script =====
<WRAP center round important 60%>
Latest YAML script version will be on:\\
[[linux:cloud-init:standard-cloudinit-yaml|Standard cloud-init script]]
</WRAP>



====== Additional lines that can be added ======
===== Disable selinux =====
<code>
  - [ sed, -i, "s/SELINUX=enforcing/SELINUX=disabled/g", /etc/sysconfig/selinux ]
  - [ sed, -i, "s/SELINUX=permissive/SELINUX=disabled/g", /etc/sysconfig/selinux ]
</code>

===== bofher configs =====
That files can be added as salt states:
<code>
runcmd:
  - [ curl, -k, -o, /etc/tmux.conf, "https://dokuwiki.ciberterminal.net/doku.php?do=export_code&id=tools:tmux&codeblock=0" ]
  - [ curl, -k, -o, /etc/bashrc, "https://dokuwiki.ciberterminal.net/doku.php?do=export_code&id=tools:bashrc&codeblock=0" ]
  - [ curl, -k, -o, /etc/vimrc, "https://dokuwiki.ciberterminal.net/doku.php?do=export_code&id=tools:vim&codeblock=0" ]
</code>

====== YAML validation ======
[[http://www.yamllint.com/]]


====== Examples ======
[[linux:cloud-init:standard-cloudinit-yaml|Standard cloud-init script]]