Roy: /* Install the OS to the node and then check Installation of the node */

2021-02-22T16:49:00Z

Install the OS to the node and then check Installation of the node

Roy: /* Configure system password for the root user on the compute nodes */

2021-02-22T16:47:11Z

Configure system password for the root user on the compute nodes

Roy: /* Setup naming and hosts file */

2021-02-22T16:46:15Z

Setup naming and hosts file

Roy: /* Set the nodes to pxeboot */

2021-02-22T16:45:30Z

Set the nodes to pxeboot

Roy at 16:43, 22 February 2021

2021-02-22T16:43:56Z

Show changes

Roy: Created page with "== Base Level Setup == Note: Starting point Centos minimal 8.2 with networking in place and setup We start by setting the hostname and disabling SElinux

 setenforce 0..."

2021-02-19T11:49:49Z

Created page with "== Base Level Setup == Note: Starting point Centos minimal 8.2 with networking in place and setup We start by setting the hostname and disabling SElinux <pre> setenforce 0..."

New page

== Base Level Setup ==
Note: Starting point Centos minimal 8.2 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 ==

<pre>
yum -y install xCAT
echo ". /etc/profile.d/xcat.sh" >> ~/.bashrc
source ~/.bashrc
</pre>

== Setup Networking for provisioning ==

In this example we are using ```enp1s0f1``` as the internal interface (i.e. the pxeboot / provisioning interface)

<pre>
# setup networking for provisioning
${sms_eth_internal}=enp1s0f1
${sms_ip}=192.168.102.253
${internal_netmask}=24

# these commands seemed pointless as i already had setup - but revisit if issues later on. not sure what that broadcast + command does
ip link set dev enp1s0f1 up
ip address add 192.168.102.253/24 broadcast + dev enp1s0f1

# set the DHCP interface
chdef -t site dhcpinterfaces="xcatmn|enp1s0f1"
</pre>

== Add the Centos DVD to the installer ==

Update the URL for more recent versions if required.

NOTE: don't use the minimal iso, grab the larger DVD iso

<pre>
# grab the centos dvd iso to create a local repo
wget http://mirrors.ukfast.co.uk/sites/ftp.centos.org/8.2.2004/isos/x86_64/CentOS-8.2.2004-x86_64-dvd1.iso

copycds ./CentOS-8.2.2004-x86_64-dvd1.iso
</pre>

Query available images

<pre>
lsdef -t osimage
</pre>

== 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>
# uncomment the following to allow the compute nodes access
# Allow NTP client access from local network.
allow 192.168.0.0/16

# 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)
[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=centos8-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
# Please note: you will see a warning about how the network not having a dynamic range. Its safe to ignore this.
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>

== Useful commands ==

<pre>

# check the node stats
lsdef -t node -l
lsdef -o node0001

# check the operating systems stats
lsdef -t osimage -o centos8-x86_64-install-compute

# change a node mac address
makedhcp -d <nodename>
chdef -t node -o <nodename> mac=<new-mac>
makedhcp <nodename>
lsdef -o node001

# connect to sol
rcons <nodename>
# to exit
ctrl e + c + .

# reinstall a node
# currstate=boot
nodeset node0001 osimage=centos8-x86_64-install-compute
[root@deploy nets]# lsdef node0001 | grep currstate
currstate=install centos8-x86_64-compute

# using a console session - whats the root password?
tabedit passwd

# setup RAID1 for the compute nodes
mkdir -p /install/custom/partition/
wget https://raw.githubusercontent.com/xcat2/xcat-extensions/master/partition/raid1_rh.sh -O /install/custom/partition/raid1_rh.sh

# Set the partition file as part of the provision
chdef -t osimage centos8-x86_64-install-compute partitionfile="s:/install/custom/partition/raid1_rh.sh"

# reprovision the node
rinstall node0001 osimage=centos8-x86_64-install-compute

# disk notes: check status of RAID array
cat /proc/mdstat
mdadm --detail /dev/mdX

# add a new node to an existing cluster
</pre>

@@ Line 177: / Line 177: @@
 Once the installation is complete run the command to see the OS version installed on the node.
 <pre>
-xdsh '''<node_name>''' more '''/etc/*release'''
+xdsh <node_name> more /etc/*release
 </pre>

@@ Line 89: / Line 89: @@
 chtab key=system passwd.username=root passwd.password=`openssl rand -base64 12`
 </pre>
-# Note; for the password generation command use the Grave Accent (backquote)` to enclose the command rather than the apostrophe '
+Note; for the password generation command use the Grave Accent (backquote)` to enclose the command rather than the apostrophe '
 == Set the site domain name ==

@@ Line 9: / Line 9: @@
 <pre>
-hostnamectl set-hostname '''<server_name.domain_name>''' # e.g. deploy.dt.internal
+hostnamectl set-hostname <server_name.domain_name> # e.g. deploy.dt.internal
 </pre>
@@ Line 17: / Line 17: @@
 # Ensure there is a /etc/hosts entry for the internal interface
-'''<ip_address> <server_name> <server_name.domain_name>'''
+<ip_address> <server_name> <server_name.domain_name>
 </pre>

@@ Line 164: / Line 164: @@
 <pre>
 nodeset compute osimage=centos8-x86_64-install-compute
-<pre>
+</pre>
 == Precheck that the xCAT management node is ready for OS provision ==

XCAT Installation on Centos 8.3 - Revision history

Roy: /* Install the OS to the node and then check Installation of the node */

Roy: /* Configure system password for the root user on the compute nodes */

Roy: /* Setup naming and hosts file */

Roy: /* Set the nodes to pxeboot */

Roy at 16:43, 22 February 2021

Roy: Created page with "== Base Level Setup == Note: Starting point Centos minimal 8.2 with networking in place and setup We start by setting the hostname and disabling SElinux
setenforce 0..."