Hi Helmu,
Thanks for the help and addressing that this is a valid deployment...i will
test this and contact you if something goes wrong.Thanks again.
Best Regards,
Mahmoud Ramadan Ali
Network and VOIP Specialist.
Mobil: (+2) 01276877112
Blog <http://hotciscolabs.blogspot.com/>| Website
<http://telecomandsecurity.com/>| LinkedIn
<http://ch.linkedin.com/pub/mahmoud-ali/99/923/421/en>
On Mon, Sep 7, 2015 at 10:00 AM, Helmut Lichtenberg <h...@tzv.fal.de> wrote:
> Mahmoud Ramadan schrieb am 05.09.2015 19:27:
> > I have NO problem to deploy one server in each remote site to push the
> > Thin/Fat client images to the clients in the LAN just to preserve more
> > bandwidth on the WAN then i place the LTSP servers in the cloud.
> >
> > In other words, I'm thinking to deploy TFTP and PXE in each remote site
> so
> > the clients in the LAN can PXE boot and download their images
> locally,then
> > point them in the configuration file to LTSP servers in the cloud BUT i
> do
> > NOT know what modifications i need to do to point the Thin / Fat clients
> to
> > LTSP servers other than the servers running the TFTP service? If anyone
> can
> > clear that it will be appreciated !
>
> I have separated all these services for years, and I like it. :^)
>
> 1. dhcp
> The client's PXE/dhcp requests are served by a separate dhcp server. In the
> dhcpd.conf file I have an entry like this:
>
> group {
> # tsi2, Image ist Debian Jessie 32-bit (i386):
> next-server 10.1.3.30;
> option root-path "/opt/ltsp/i386";
> if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient"
> {
> filename "/ltsp/i386/pxelinux.0";
> } else {
> filename "/ltsp/i386/vmlinuz";
> }
> host otc3 { hardware ethernet 00:e0:c5:45:2b:85; fixed-address
> otc3; }
> host c474 { hardware ethernet 00:01:2e:64:b5:3e; fixed-address
> c474; }
> host hp7 { hardware ethernet c8:cb:b8:2e:0b:6e; fixed-address hp7;
> }
> }
>
> 2. ltsp image
> The dhcp server points to my image server (tsi2, 10.1.3.30). This server
> provides the nbd image (or nfs if you prefer), the tftp service, and keeps
> the
> configuration file lts.conf.
>
> In the lts.conf on tsi2 I have entries like:
>
> [c474]
> LTS_SERVERS = lts2 lts3
>
> [otc3]
> LTS_SERVERS = lts3
>
>
> 3. ltsp application server
> On my LTSP application servers (lts2, lts3), where all users work on, I
> have these
> (Debian) packages installed:
> ldm-server
> ldm-themes
> ltsp-docs
> ltsp-server
> ltspfs
>
> 4. Selecting the least loaded terminal server at thin client boot time for
> some basic load balancing (maybe you don't need/want this):
>
> Note: The variable LTS_SERVERS is home brewed, not standard. It is used by
> the
> script /opt/ltsp/i386/usr/share/ltsp/get_hosts. Maybe the default ltsp
> variable
> LDM_SERVER is for just this purpose. Can someone confirm this?
>
> Anyway, here's my script (shamelessly stolen from some nice guy):
>
> #!/bin/bash
>
> ##############################################################################
> # /opt/ltsp/i386/usr/share/ltsp/get_hosts
>
> ##############################################################################
>
> echo `date` >/tmp/lts-serverlist
> LIST=""
>
> # Load query on all servers
> for i in $LTS_SERVERS; do
> LOAD=`nc $i 9571|grep rating|cut -d: -f2`
> if test $LOAD; then
> # add to the list
> LIST="$LIST$LOAD $i\n"
> fi
> done
>
> # Now LIST contains the list of servers sorted by load
> LIST=`echo -e $LIST | sort -nr`
> echo $LIST >>/tmp/lts-serverlist
>
> # Check if the 1st items have the same load. If so, randomly choose one.
> OLDIFS=$IFS
> IFS="
> "
> BESTLIST=( )
> I=0
> for LINE in $LIST ;do
> LOAD=`echo $LINE|cut -f 1 -d " "`
> if [ "$OLDLOAD" -a "$LOAD" != "$OLDLOAD" ] ;then
> break
> fi
> BESTLIST[$I]="$LINE"
> OLDLOAD=$LOAD
> I=$((I+1))
> done
> RAND=$(( $RANDOM % $I ))
> # print the choosen host
> echo ${BESTLIST[$RAND]} | cut -f 2 -d " "
>
> # and once again into a file for logging:
> echo The Best: >>/tmp/lts-serverlist
> echo ${BESTLIST[$RAND]} | cut -f 2 -d " " >>/tmp/lts-serverlist
>
> exit 0
>
> ##############################################################################
>
> HTH
> Regards
> Helmut
>
> --
> -------------------------------------------------------------------------
> Helmut Lichtenberg <helmut.lichtenb...@fli.bund.de> Tel.: 05034/871-128
> Institut für Nutztiergenetik (FLI) 31535 Neustadt Germany
> -------------------------------------------------------------------------
>
>
> ------------------------------------------------------------------------------
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>
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