INSTALL¶

• INSTALL
  • Get the 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 | BUILD-ISO | INSTALL | SETUP | OPERATIONS | GITMAGIC | LICENSE | STATUS
ОБЗОР | СБОРКА-ISO | УСТАНОВКА | НАСТРОЙКА | ОПЕРАЦИИ | МАГИЯ GIT | ЛИЦЕНЗИЯ | СОСТОЯНИЕ

Get the ISO image¶

You can get the latest built ISO image here: http://sci-dev.skycover.ru/dist/SCI-CD-latest.iso
The older versions also are in the http://sci-dev.skycover.ru/dist/
Otherwise you can build your own ISO-image (for experienced users): BUILD-ISO

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).

You must to know following data at this time:

• The number and the mask of the interlink network. For ex.: 192.168.2.0/255.255.255.0
• The IP addresses of two installed nodes in the interlink network
• The internet router's address in the interlink network (typically no router will be needed here)
• The cluster's domain name
• The hostnames for new nodes
• The address of the future DNS serverin the interlink network (NOT an already existent host!),
  which will be installed on the cluster service instance.
• The root's password
• The idea on how to create storage system - to use software or hardware RAID
  or no RAID at all (not recommended) - on your own choice.

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
made the following system tuning: POST-INSTALL

The cluster is ready to setup¶

The CD installation takes about 15 minutes per node.

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
• Chose one of predefined disk layouts or layout it manually.
• Specify the disks on which yo want to place grub loader. Chose "md0 RAID" if you use software RAID for the system partition.
• Specify the additional kernel parameters (but usually you don't).

Read SETUP next.