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INSTALL » История » Версия 29

Dmitry Chernyak, 19.06.2016 20:59

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h1. INSTALL
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{{toc}}
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[[OVERVIEW]] | [[INSTALL]] | [[SETUP]] | [[OPERATIONS]] | [[LICENSE]]
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[[ОБЗОР]] | [[УСТАНОВКА]] | [[НАСТРОЙКА]] | [[ОПЕРАЦИИ]] | [[ЛИЦЕНЗИЯ]]
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h2. Get the ISO image
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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).
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You can also build your own ISO-image (for experienced users): [[BUILD-ISO]]
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h2. Burn the ISO image
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You burn it with your favorite tool (for ex. - k3b).
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h2. Create bootable USB flash
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At present this option is only available when you build the ISO image yourself.
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Consult [[BUILD-ISO]].
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h2. Minimal System Requirements
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In real case you must choose hardware in according to real objectives.
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For testing purposes minimal system requierements is:
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* 1.2 GB RAM
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* 50GB HDD
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* 1Gbit ethernet for DRBD link (if you setup 2 or more nodes)
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* Hardware Virtualization support: Intel VT or AMD CPU (if you want to run the Windows instances)
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h2. Install the system
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Install the system on two nodes (you may use only one node, but high
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availability capabilities will be unavailable).
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The installer will ask you:
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* The node's IP-address on the interlink. For ex.: 192.168.2.1(2)
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* The network mask. For ex.: 255.255.255.0
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* The node's name. For ex.: gnt1(2)
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* The domain. For ex.: gnt.yourcompany.com
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* The default router's address (DO NOT specify if you use the separate network
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card for the interlink!)
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* The (new) DNS server's address on the interlink. For ex.: 192.168.1.254
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* The root password
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* Chose one of predefined disk layouts or layout it manually.
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* Specify the disks on which yo want to place grub loader. Chose "md0" if you use
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the software RAID for the system partition.
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* Specify the additional kernel parameters (but usually you don't).
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h3. Partitioning
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During the installation you will be prompted to chose the one of predefined disk layouts
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useful for 1-8 disk nodes with or without the hardware RAID.
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If you chose the "manual layout" option then you should preserve following partitions on your nodes:
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|_.Name|_.Size|_.Purpose|
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|/|10G|Root partition for all node's data|
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|swap|1G|Swap space for Dom0 in calculation of 512Mb RAM|
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|xenvg|the rest or the another device|The LVM Volume, named 'xenvg', without any partitions|
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The VG "xenvg" will be used as the default place for the instance's volumes.
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Also the "system-stuff" volume will be automatically created on xenvg (and mounted as /stuff).
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It serves for various big stuff like cdrom images, instance backups etc.
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At our own choice you may defer the creation of xenvg during the installation stage and to create it later.
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In this case any option with "no LVM" will be useful.
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 NOTE: If you want to place your own partitions on xenvg, you should
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then exclude them from ganeti-managed volumes. (SEE [[SETUP]]).
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Simplest way is to name your partitions "sytem-*" because this
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pattern is excluded in SCI-CD by default.
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You may create more partitions or volume groups at your choice.
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h3. DNS server's address
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The cluster has it's own DNS server, which is also the 'approx' and
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'puppet' server. At the [[SETUP]] stage, cluster DNS server can be linked
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to other DNS servers in the forwarding mode.
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The DNS server's address +must not+ be the address of the existing service.
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The cluster's domain name +must not+ be the name of the existing domain if
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local domain already exists (use subdomain, or completely different name).
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h2. Automatic post-installation changes
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During the installation phase, the postinst.sh script from the distro
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will apply over 40 system tweaks: [[POST-INSTALL]] 
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The CD installation takes about 15 minutes per node.
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h2. The cluster is ready to setup
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Read [[SETUP]] next.