INSTALL¶

• INSTALL
  • Get the ISO image
  • Custom build ISO-image
  • Burn the ISO image
  • Create bootable USB flash
  • Minimal System Requirements
  • Install the system
    • Partitioning
    • DNS server's address
  • Automatic post-installation changes
  • The cluster is ready to setup

OVERVIEW | INSTALL | SETUP | OPERATIONS | LICENSE
ОБЗОР | УСТАНОВКА | НАСТРОЙКА | ОПЕРАЦИИ | ЛИЦЕНЗИЯ

Get the ISO image¶

Download the distribution disk, ready to install: Download ISO-image
To access it you should register

Custom build ISO-image¶

How to build your own ISO-image described here: BUILD-ISO (for experienced users, who want to include their own works to the distribution set)

Burn the ISO image¶

You burn it with your favorite tool (for ex. - k3b).

Create bootable USB flash¶

At present this option is only available when you build the ISO image yourself.
Consult BUILD-ISO.

Minimal System Requirements¶

In real case you must choose hardware in according to real objectives.
For testing purposes minimal system requierements is:

• 1.2 GB RAM
• 50GB HDD
• 1Gbit ethernet for DRBD link (if you setup 2 or more nodes)
• Hardware Virtualization support: Intel VT or AMD CPU (if you want to run the Windows instances)

Install the system¶

Install the system on two nodes (you may use only one node, but high
availability capabilities will be unavailable).

The installer will ask you:

• The node's IP-address on the interlink. For ex.: 192.168.2.1(2)
• The network mask. For ex.: 255.255.255.0
• The node's name. For ex.: gnt1(2)
• The domain. For ex.: gnt.yourcompany.com
• The default router's address (DO NOT specify if you use the separate network
  card for the interlink!)
• The (new) DNS server's address on the interlink. For ex.: 192.168.1.254
• The root password
• Chose one of predefined disk layouts or layout it manually.
• Specify the disks on which yo want to place grub loader. Chose "md0" if you use
  the software RAID for the system partition.
• Specify the additional kernel parameters (but usually you don't).

Partitioning¶

During the installation you will be prompted to chose the one of predefined disk layouts
useful for 1-8 disk nodes with or without the hardware RAID.

If you chose the "manual layout" option then you should preserve following partitions on your nodes:

Name	Size	Purpose
/	10G	Root partition for all node's data
swap	1G	Swap space for Dom0 in calculation of 512Mb RAM
xenvg	the rest or the another device	The LVM Volume, named 'xenvg', without any partitions

The VG "xenvg" will be used as the default place for the instance's volumes.
Also the "system-stuff" volume will be automatically created on xenvg (and mounted as /stuff).
It serves for various big stuff like cdrom images, instance backups etc.

At our own choice you may defer the creation of xenvg during the installation stage and to create it later.
In this case any option with "no LVM" will be useful.

NOTE: If you want to place your own partitions on xenvg, you should
then exclude them from ganeti-managed volumes. (SEE [[SETUP]]).
Simplest way is to name your partitions "sytem-*" because this
pattern is excluded in SCI-CD by default.

You may create more partitions or volume groups at your choice.

DNS server's address¶

The cluster has it's own DNS server, which is also the 'approx' and
'puppet' server. At the SETUP stage, cluster DNS server can be linked
to other DNS servers in the forwarding mode.

The DNS server's address must not be the address of the existing service.

The cluster's domain name must not be the name of the existing domain if
local domain already exists (use subdomain, or completely different name).

Automatic post-installation changes¶

During the installation phase, the postinst.sh script from the distro
will apply over 40 system tweaks: POST-INSTALL

The CD installation takes about 15 minutes per node.

The cluster is ready to setup¶

Read SETUP next.