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<?xml version='1.0' encoding="UTF-8"?> |
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<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> |
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|
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<guide link="/doc/en/ltsp.xml"> |
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<title>Gentoo - LTSP Guide</title> |
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<author title="Author"> |
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<mail link="lanius@gentoo.org">Heinrich Wendel</mail> |
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</author> |
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<author title="Author"> |
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<mail link="josiah@ritchietribe.net">Josiah Ritchie</mail> |
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</author> |
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<author title="Editor"> |
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<mail link="swift@gentoo.org">Sven Vermeulen</mail> |
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</author> |
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|
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<license/> |
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|
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<abstract> |
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This guide shows you how to setup a LTSP Server with Gentoo. |
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</abstract> |
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<version>1.1</version> |
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<date>26 July 2003</date> |
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<chapter> |
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<title>Introduction</title> |
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<section> |
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<title>What is LTSP?</title> |
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<body> |
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<p> |
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LTSP is an abbreviation for "Linux Terminal Server Project". Installed |
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on a server it can supply many workstations (so called thin-clients) |
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with identical environments. All applications run on the server and |
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therefore you can use old PCs and convert them into XTerminals. This |
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reduces costs and maintenance especially in an environment where you |
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need to have an uniform workspace on each computer you login, e.g. in |
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schools or firms. |
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</p> |
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</body> |
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</section> |
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</chapter> |
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<chapter> |
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<title>Installation</title> |
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<section> |
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<title>Preliminaries</title> |
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<body> |
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<p> |
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All of the examples in this document presume that your server's IP is |
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192.168.0.254, your domain is named yourdomain.com and your network is |
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192.168.0.0/24. |
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</p> |
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</body> |
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</section> |
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<section> |
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<title>Installation</title> |
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<body> |
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|
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<p> |
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First of all, you must have a working Gentoo system. Please read the |
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Gentoo Installation Manual for your architecture on <uri |
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link="http://www.gentoo.org/doc">Gentoo's Documentation Website</uri>. |
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</p> |
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|
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<p> |
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Then lets begin with the easiest step, installing the ltsp core |
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utils: |
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</p> |
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|
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<pre caption="Emerge LTSP"> |
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# <i>emerge ltsp-core</i> |
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</pre> |
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|
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<p> |
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This will install the following packages as dependencies: |
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</p> |
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|
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<ul> |
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<li><b>XFree</b>: They are called XTerminals, guess why :)</li> |
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<li><b>DHCP</b>: DHCP is a protocol for automating the configuration of |
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computers that use TCP/IP, used by ltsp to distribute IPs to the |
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workstations.</li> |
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<li><b>NFS</b>: NFS is a protocol to allow access to harddisks through |
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the network, used by ltsp to mount a base system for the |
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workstations.</li> |
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<li><b>TFTP</b>: TFTP is a simple file transfer protocol, used by ltsp |
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to transfer the kernel to the workstations.</li> |
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<li><b>XINETD</b>: Xinetd is a powerful replacement for inetd, with |
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advanced features, used by ltsp to start tftp.</li> |
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</ul> |
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|
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<note> |
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If you have the kde/gnome useflag set, it will also install a complete kde/gnome system. |
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</note> |
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|
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</body> |
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</section> |
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</chapter> |
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<chapter> |
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<title>Configuration</title> |
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<body> |
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|
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<p> |
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After the emerge process has finished all services must be configured: |
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</p> |
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|
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</body> |
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<section> |
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<title>System Logger</title> |
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<body> |
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|
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<p> |
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To analyze problems easier, the system logger must be configured to |
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accept remote connections. Please read the documentation of your |
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system logger on how to achieve this. |
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</p> |
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|
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</body> |
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</section> |
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<section> |
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<title>NFS</title> |
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<body> |
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|
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<p> |
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Next step is to edit your <path>/etc/exports</path> file, in order to |
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allow the workstations to mount the root filesystem. There should be at |
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least two lines in it: |
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</p> |
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|
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<pre caption="/etc/exports"> |
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/opt/ltsp/i386 192.168.0.0/255.255.255.0(ro,no_root_squash,async) |
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/var/opt/ltsp/swapfiles 192.168.0.0/255.255.255.0(rw,no_root_squash,async) |
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</pre> |
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|
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<note> |
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You have to alter the network/netmask to match your network/netmask |
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settings. |
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</note> |
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|
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<p> |
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Now start NFS. |
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</p> |
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|
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<pre caption="Starting nfs"> |
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# <i>rc-update add nfs default</i> |
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# <i>/etc/init.d/nfs start</i> |
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</pre> |
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|
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</body> |
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</section> |
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|
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<section> |
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<title>xinetd/tftp</title> |
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<body> |
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|
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<p> |
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By default TFTP won't be started, to change this edit |
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<path>/etc/xinetd.d/tftp</path> and replace <c>disable=yes</c> with |
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<c>disable=no</c>. Afterwards, start xinitd. |
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</p> |
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|
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<pre caption="Starting xinetd"> |
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# <i>rc-update add xinetd default</i> |
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# <i>/etc/init.d/xinetd start</i> |
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</pre> |
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|
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</body> |
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</section> |
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<section> |
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<title>Name resolving</title> |
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<body> |
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|
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<p> |
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In order for the workstation to reach all resources, a correct name |
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resolving must be available. There are several ways to achieve this. One |
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is to configure a DNS server for the local network, the other (and more |
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simple) is to have almost identical <path>/etc/hosts</path> files on all |
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systems. We are going to use the latter. |
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</p> |
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|
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<p> |
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All workstations must be listed in <path>/etc/hosts</path>. Take a look |
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at the example: |
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</p> |
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|
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<pre caption="/etc/hosts"> |
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127.0.0.1 localhost |
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192.168.0.254 server server.yourdomain.com |
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192.168.0.1 ws-1 ws-1.yourdomain.com |
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</pre> |
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|
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</body> |
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</section> |
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<section> |
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<title>DHCP Config</title> |
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<body> |
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|
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<p> |
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This is the most complicated step in my opinion, you have to create a |
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valid DHCP Config (<path>/etc/dhcp/dhcpd.conf</path>). Here is an |
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example: |
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</p> |
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|
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<pre caption = "dhcpd.conf"> |
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<codenote>Some general options</codenote> |
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default-lease-time 21600; |
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max-lease-time 21600; |
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use-host-decl-names on; |
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ddns-update-style ad-hoc; |
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|
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<codenote>Bootp options</codenote> |
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allow booting; |
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allow bootp; |
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|
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<codenote>Network Options</codenote> |
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option subnet-mask 255.255.255.0; |
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option broadcast-address 192.168.0.255; |
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option routers 192.168.0.254; |
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option domain-name-servers 192.168.0.254; |
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option log-servers 192.168.0.254; |
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option domain-name "yourdomain.com"; |
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|
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<codenote>LTSP Path Options</codenote> |
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option root-path "192.168.0.254:/opt/ltsp/i386"; |
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filename "/lts/vmlinuz-2.4.19-ltsp-1"; |
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|
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<codenote>If your workstations have ISA NICs uncomment the following</codenote> |
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<codenote>lines and alter the driver and IO</codenote> |
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#option option-128 code 128 = string; |
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#option option-129 code 129 = text; |
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#option option-128 e4:45:74:68:00:00; |
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#option option-129 "NIC=ne IO=0x300"; |
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|
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shared-network WORKSTATIONS { |
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subnet 192.168.0.0 netmask 255.255.255.0 { |
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<codenote>Distribute dynamic IPs to the workstations</codenote> |
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range dynamic-bootp 192.168.1.1 192.168.1.16; |
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<codenote>Workstation specific configuration for PXE booting</codenote> |
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#host ws001 { |
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# hardware ethernet 00:E0:06:E8:00:84; |
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# fixed-address 192.168.0.1; |
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#} |
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} |
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} |
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</pre> |
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|
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<p> |
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If your workstations support PXE, you should list each one of them as we |
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have done with <e>host ws001</e> (don't forget to uncomment it). Don't |
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give them an adress in the dynamic range, otherwise it would be possible |
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that more workstations have the same IP (which is troublesome). |
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</p> |
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|
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<p> |
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For more documentation on this item read the official dhcp handbook: |
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<uri>http://www.dhcp-handbook.com/</uri> |
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</p> |
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|
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<p> |
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Now start DHCP as you did with NFS and xinetd: |
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</p> |
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|
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<pre caption="start xinetd"> |
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# <i>rc-update add dhcp default</i> |
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# <i>/etc/init.d/dhcp start</i> |
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</pre> |
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|
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<note> |
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Note: DHCPD needs CONFIG_PACKET and CONFIG_FILTER activated in the kernel to work. |
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</note> |
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|
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</body> |
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</section> |
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|
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<section> |
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<title>LTSP Configuration</title> |
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<body> |
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|
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<p> |
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There are many options to configure your workstations, visit |
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<uri>http://www.ltsp.org/documentation/ltsp-3.0-4-en.html#AEN903</uri> |
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for a full description of <path>/opt/ltsp/i386/etc/lts.conf</path>. |
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</p> |
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|
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</body> |
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</section> |
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|
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<section> |
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<title>Displaymanager</title> |
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<body> |
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|
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<p> |
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Now you have to change your displaymanager's configuration to |
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also accept remote connections. |
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</p> |
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|
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<p> |
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<b>XDM</b>: In <path>/etc/X11/xdm/xdm-config</path> comment out <c>DisplayManager.requestPort: 0</c> |
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</p> |
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|
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<p> |
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<b>KDM</b>: In <path>/usr/kde/3.1/share/config/kdm/kdmrc</path> look |
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for the <c>[Xdmcp]</c> section and change <c>Enable = false</c> to |
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<c>Enable = true</c>. |
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</p> |
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|
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<p> |
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<b>GDM</b>: In <path>/etc/X11/gdm/gdm.conf</path> look for the |
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<c>[xdmcp]</c> section and change <c>Enable = false</c> to |
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<c>Enable = True</c>. |
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</p> |
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|
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<p> |
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Then start the displaymanager: |
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</p> |
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|
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<pre caption="Starting xdm"> |
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# <i>rc-update add xdm default</i> |
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# <i>/etc/init.d/xdm start</i> |
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</pre> |
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|
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<warn> |
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There seem to be problems currently with XDM and GDM. The author used |
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KDM to resolve these issues. |
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</warn> |
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|
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</body> |
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</section> |
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|
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<section> |
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<title>Creating a bootfloppy</title> |
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<body> |
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|
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<p> |
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If you workstations don't support PXE booting, you must create a |
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boot-floppy, which is needed to start your workstations. Go to |
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<uri>http://www.rom-o-matic.net/5.0.9/</uri>, select your NIC, press |
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<e>Get ROM</e> and write the image to a floppy: |
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</p> |
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|
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<pre caption="Write floppy iamge"> |
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# <i>cat nicfile.lzdsk > /dev/fd0</i> |
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</pre> |
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|
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</body> |
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</section> |
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</chapter> |
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|
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<chapter> |
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<title>Troubleshooting</title> |
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<body> |
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|
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<p> |
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There are a lot of things that can be the source of trouble, but there |
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are also several resources around which help you solve your problems: |
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</p> |
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|
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<ul> |
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<li>The official documentation: |
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<uri>http://www.ltsp.org/documentation/</uri>, especially the |
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Troubleshooting section.</li> |
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<li>The gentoo IRC channel: irc.freenode.org #gentoo</li> |
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<li>The ltsp irc channel: irc.freenode.org #ltsp</li> |
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<li>The ltsp mailinglists <uri>http://ltsp.org/mailinglists.php</uri> |
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are full of some real good knowledge.</li> |
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</ul> |
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</body> |
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</chapter> |
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|
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<chapter> |
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<title>FAQ</title> |
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<body> |
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<p> |
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<b>Q:</b> My workstations have Pentium II CPUs, but my server is compiled |
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with <c>march=athlon-xp</c>, does this work? |
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</p> |
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|
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<p> |
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<b>A:</b> This is no problem, because all applications run on the server. |
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</p> |
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|
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<p> |
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<b>Q:</b> Which CPU and how much RAM should the server have? |
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</p> |
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|
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<p> |
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<b>A:</b> There is a good document with suggestions at |
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<uri>http://ltsp.org/documentation/server_suggestions.html</uri>. |
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</p> |
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|
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<p> |
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<b>Q:</b> Do you have more information about this PXE stuff? |
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</p> |
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|
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<p> |
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<b>A:</b> Yes, take a look at |
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<uri>http://ltsp.org/documentation/eproms.txt</uri> |
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and <uri>http://ltsp.org/documentation/pxe.howto.html</uri>. |
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</p> |
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|
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<p> |
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<b>Q:</b> Is it possibly to use 3D-Accelerated software on the workstations? |
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</p> |
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|
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<p> |
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<b>A:</b> If you are using NVidia cards take a look at |
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<uri>http://ltsp.org/documentation/nvidia.txt</uri>. |
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</p> |
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|
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<p> |
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<b>Q:</b> In some applications the fonts look crapy, what do to? |
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</p> |
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|
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<p> |
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<b>A:</b> You have to setup the XFontServer, Add <c>USE_XFS=Y</c> to your |
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<path>lts.conf</path>, edit <path>/etc/X11/fs/config</path> and comment |
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<c>no-listen: tcp</c> out, replace <c>XFS_PORT="-1"</c> with |
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<c>XFS_PORT="7100"</c> in <path>/etc/conf.d/xfs</path> and start xfs: |
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<c>/etc/init.d/xfs start</c>. |
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</p> |
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|
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</body> |
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</chapter> |
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|
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<chapter> |
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<title>Glossary</title> |
| 424 |
<body> |
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|
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<p> |
| 427 |
<b><a href="http://www.ltsp.org">LTSP</a></b> |
| 428 |
"The LTSP provides a simple way to utilize low cost workstations as either i |
| 429 |
graphical or character based terminals on a GNU/Linux server." |
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</p> |
| 431 |
|
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<p> |
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<b><a href="http://www.webopedia.com/TERM/P/PXE.html">PXE</a></b> |
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"Short for Pre-Boot Execution Environment. Pronounced pixie, PXE is one of the |
| 435 |
components of Intel's WfM specification. It allows a workstation to boot from |
| 436 |
a server on a network prior to booting the operating system on the local hard |
| 437 |
drive. A PXE-enabled workstation connects its NIC to the LAN via a jumper, |
| 438 |
which keeps the workstation connected to the network even when the power is |
| 439 |
off." |
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</p> |
| 441 |
|
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</body> |
| 443 |
</chapter> |
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</guide> |
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