SCI-CD

h1. INSTALL

{{toc}}

[[OVERVIEW]] | [[INSTALL]] | [[SETUP]] | [[OPERATIONS]] | [[LICENSE]] | [[STATUS]]

[[ОБЗОР]] | [[УСТАНОВКА]] | [[НАСТРОЙКА]] | [[ОПЕРАЦИИ]] | [[ЛИЦЕНЗИЯ]] | [[СОСТОЯНИЕ]]

h2. Get the ISO image

Download the latest built ISO image in the "Documents":https://sci.skycover.ru/projects/sci-cd/documents section (to access it you should register on this site).

You can also build your own ISO-image (for experienced users): [[BUILD-ISO]]

h2. Burn the ISO image

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

h2. Create bootable USB flash

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

Consult [[BUILD-ISO]].

h2. 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)

h2. 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).

h3. 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.

h3. 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).

h2. 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.

h2. The cluster is ready to setup

Read [[SETUP]] next.