[K12OSN] K12Linux EL6 Setup Instructions

[Julius Szelagiewicz]

Dear Folks,
 I'm trying to set up a CentOS 6 server and I've followed the beta
instrunctions faithfully (substituting CentOS 6 for SL 6). The software
appears to load happily, but there is no /tftpdir created and /opt/ltsp
stays empty. Any ideas?
Julius



> Setup LTSP Server on Scientific Linux 6
> =======================================
> 1. Install Scientific Linux 6 with GNOME desktop.
>
> 2. http://mplug.org/~k12linux/rpm/el6/
> Install ltsp-server, ltspfs and nbd from here, choose i686 or x86_64
> matching your server arch.
>
> 3. Grab http://togami.com/~warren/temp/ltsp-i386.ks and replace the file
> at /etc/ltsp/kickstart/Fedora/el6/ltsp-i386.ks.  Keep in mind that
> future ltsp-server RPM upgrades will wipe out your changed ltsp-i386.ks,
> so you will need to replace it again until the beta goes public.
>
> 4. https://fedorahosted.org/k12linux/wiki/InstallGuide
> Follow the directions here but stop after you have disabled the iptables
> firewall.
>
> 5. Run /usr/bin/ltsp-server-tweaks
> https://fedorahosted.org/k12linux/wiki/Devel/ltsp-server-tweaks
> See here for important details.
>
> Network Setup with K12Linux EL6
> ===============================
> The old Fedora instructions to make service network and NetworkManager
> co-exist doesn't work because system-config-network lacks a GUI
> interface in EL6.  Thus we need to manually configure attaching a
> dedicated ethernet device to the bridge.
>
> Requirements:
> * TWO network interfaces, either two ethernet, or one wifi and one
> ethernet.
> * One of the ethernet interfaces must be dedicated to serving DHCP and
> booting thin clients on an isolated network segment.  This interface has
> NM_CONTROLLED=no to ensure that NetworkManager wont interfere with it.
> * The other interface (ethernet or wifi) must be the route to the
> Internet.  This interface is managed by NetworkManager.  NetworkManager
> in EL6 is a lot better than earlier versions.  You can define interfaces
> as static and always available, so they are configured at bootup without
> a user logging into the desktop.
>
> 1. Run "ifconfig" and look for the unused ethernet interface, it should
> look something like the below.  Write down the ethX device name and MAC
> address as you will need this in the following steps.
>
> eth0      Link encap:Ethernet  HWaddr 00:15:58:7E:24:66
>            inet6 addr: fe80::215:58ff:fe7e:5470/64 Scope:Link
>            UP BROADCAST MULTICAST  MTU:1500  Metric:1
>            RX packets:2071831 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:2769292 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:100
>            RX bytes:399370077 (380.8 MiB)  TX bytes:2658000993 (2.4 GiB)
>            Memory:ee000000-ee020000
>
> 2. cd /etc/sysconfig/network-scripts
>
> 3. Look at ifcfg-* files.  Is there a ifcfg-Auto_ethX matching the
> device name of the interface you chose above?  If so, rename it to
> ifcfg-ethX.
>
> 4. Replace the contents of ifcfg-ethX with something similar to below,
> replacing the ethX device name and MAC address with your own.
>
> HWADDR=00:15:58:7E:24:66
> TYPE=Ethernet
> BOOTPROTO=none
> IPV4_FAILURE_FATAL=no
> IPV6INIT=no
> NAME="eth0"
> ONBOOT=yes
> NM_CONTROLLED=no
> BRIDGE=ltspbr0
>
> 5. service network restart; chkconfig network on
>
> 6. brctl show
> This command should show that your chosen ethX device is added to the
> ltspbr0 bridge.
>
> 7. At this point you should be able to plug in and boot a PXE thin
> client on that Ethernet interface.
>
> Other New K12Linux EL6 Instructions
> ===================================
> https://fedorahosted.org/k12linux/wiki/VirtualPXEClient
> Virtual Machine PXE Client
> https://fedorahosted.org/k12linux/wiki/LocalAppsSupport
> Learn how to install and run Firefox as a Local App.  Requires maybe 1GB
> RAM on the client, maybe 512MB RAM after I later build a new client
> kernel.
>
> Warren Togami
> warren at togami.com
>