View source for XCAT Installation on Centos 7

== Base Level Setup ==

Note: Starting point Centos minimal 7 with networking in place and setup 

We start by setting the hostname and disabling SElinux 

<pre>
setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux 
yum -y install vim tmux wget rsyslog
systemctl enable rsyslog
systemctl start rsyslog
</pre>

== Setup naming and hosts file ==
Set the hostname 

<pre>
hostnamectl set-hostname deploy.dt.internal 
</pre>

Set the '''/etc/hosts''' file 

<pre>
# Ensure there is a /etc/hosts entry for the internal interface

192.168.102.253 deploy.dt.internal      deploy
</pre>

== Disable the firewall ==
Disable the firewall

<pre>
systemctl disable firewalld
systemctl stop firewalld
</pre>

== Setup the software repos ==
<pre>
yum -y install yum-utils
wget --no-check-certificate -P /etc/yum.repos.d https://xcat.org/files/xcat/repos/yum/latest/xcat-core/xcat-core.repo

yum -y install centos-release-stream
wget --no-check-certificate -P /etc/yum.repos.d https://xcat.org/files/xcat/repos/yum/xcat-dep/rh8/x86_64/xcat-dep.repo
</pre>

== Add provisioning services on the headnode ==



== Download CentOS ==
 wget http://mirrors.ukfast.co.uk/sites/ftp.centos.org/7.9.2009/isos/x86_64/CentOS-7-x86_64-DVD-2009.iso

== Define Compute image for provisioning ==
 copycds ${iso_path}/CentOS-7-x86_64-DVD-1908.iso (where ${iso_path} is directory of the iso)

=== This file name must match the boot image from lsdef -t osimage ===

== Enable ssh during the installation on the compute nodes ==
<pre>
# enables ssh to the node during installation
chdef -t site clustersite xcatdebugmode=2
lsdef -t site clustersite
</pre>

== Enable the time service (Chronyd) ==
<pre>
# add to the end of the file /etc/chrony.conf (note below for Indonesia, select correct tz)
echo "
server 1.id.pool.ntp.org
server 2.id.pool.ntp.org
server 3.id.pool.ntp.org
server 4.id.pool.ntp.org" >> /etc/chrony.conf

systemctl enable chronyd
systemctl start chronyd
</pre>

== Add a node to the installation ==

<pre>
# add a node
# note: serialport=0 (ttyS0)
#       serialport=1 (ttyS1)
# replace each parameter with appropriate information
[root@deploy ~]# mkdef -t node node0001 groups=compute,all ip=192.168.102.10 mac=00:15:B2:AA:E2:60 netboot=xnba arch=x86_64 bmc=192.168.101.10 bmcusername=admin bmcpassword=admin mgt=ipmi serialport=0 serialspeed=115200 provmethod=centos7.9-x86_64-install-compute
1 object definitions have been created or modified.

# set the root password
chtab key=system passwd.username=root passwd.password=`openssl rand -base64 12`

# set the domain name
chdef -t site domain=dt.internal 
</pre>


Finalise the setup - below will create the /tftpboot files and /etc/hosts etc. 

<pre>
# finalise the setup 
# Complete network service configurations
makehosts
makenetworks 
makedhcp -n
makedns -n
</pre>


== Check the rcons status ==

<pre>
# might not be needed systemctl enable goconserver
# systemctl start goconserver
makegocons
makegocons -q
</pre>


== Set the nodes to pxeboot ==

<pre>
# Associate desired provisioning image for computes
nodeset compute osimage=centos8-x86_64-install-compute
rinstall nvme0001 osimage=centos8-x86_64-install-compute
</pre>