INSTALL¶

• INSTALL
  • Get ISO image
  • Burn 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

Get ISO image¶

You can get built ISO from here (english version - skycover-version-en.iso): http://sci-dev.skycover.ru/dist/
Otherwise you can build your own iso (for experienced users): BUILD-ISO

Burn ISO image¶

You burn it with your favorite tool (for ex. - k3b).
Also you can create bootable usb flash via script located here: http://apt.vds-host.org/sci-cd/0.9.1/makeusb.sh

Create bootable USB flash¶

We wrote script for this:
You must have usb flash with first vfat partition that able to fit installer iso image.
start the script from root:

./makeusb.sh /dev/sdX

where /dev/sdX - path to block device pointing to your usb flash(whole flash, not a partition with vfat - not /dev/sdX1).
After execution of script vfat from flash will be mounted on /mnt (it may be changed in script). You must put ISO image in root directory of this filesystem and correctly umount it.
Now you can start installer from your flash drive.

Minimal System Requirements¶

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

• 1GB RAM
• 50GB HDD
• 1Gbit ethernet for DRBD link(if nodes are more than 1)
• Hardware Virtualization support(if you want to use HVM mode)

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 mask of local network
• The IP addresses of two installed nodes (in the same network)
• The internet router's address (in the same network, if any)
• The cluster's domain name
• The hostnames for new nodes
• The address of the future DNS server(NOT an 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 MD or hardware raid
  or no raid at all(not recommended) - on your own choice.

Network topology configuration is complicated question, it described here: SETUP

Partitioning¶

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	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.

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 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.
Read SETUP next.