Kickstart Infrastructure SOP
(make the grubby command a bit more legible)
|Line 42:||Line 42:|
Revision as of 13:34, 18 August 2008
Kickstart - SOP
Owner: Fedora Infrastructure Team
Contact: #fedora-admin, sysadmin-main
Servers: puppet1 (stores kickstarts and install media)
Purpose: Provides our install infrastructure
We only have a handful of different kickstart scripts, those in a xen guest and the xen box itself.
Our kickstart infrastructure lives on the proxy servers and puppet1. All install media and kickstart scripts are located on puppet1. Because the RHEL binaries are not public we have these bits blocked. You can add your bits to (from puppet1):
Physical Machine (dom0)
Xen Dom0 installs are far riskier then the DomU installs below. This is because if an install goes bad, your options to rebuild it are somewhat limited.
If PXE booting just follow the prompt after doing the pxe boot (most hosts will pxeboot via console hitting f12.
This only works on an already booted box, many boxes at our colocations may have to be rebuilt by the people in those locations first. Also make sure the IP you are about to boot to install from is allowed to our IP restricted infrastructure.fedoraproject.org as noted above (in Introduction).
Download the vmlinuz and initrd images.
wget http://infrastructure.fedoraproject.org/rhel/RHEL5-x86_64/images/pxeboot/vmlinuz \ -O /boot/vmlinuz-install wget http://infrastructure.fedoraproject.org/rhel/RHEL5-x86_64/images/pxeboot/initrd.img \ -O /boot/initrd-install.img grubby --add-kernel=/boot/vmlinuz-install \ --args="ks=http://infrastructure.fedoraproject.org/rhel/ks/xen-host \ method=http://infrastructure.fedoraproject.org/rhel/RHEL5-x86_64/ \ ksdevice=link ip=$IP gateway=$GATEWAY netmask=$NETMASK dns=$DNS" \ --title="install el5" --initrd=/boot/initrd-install.img
Double and triple check your configuration settings (cat /boot/grub/menu.lst), especially your IP information. In places like ServerBeach not all hosts have the same netmask or gateway. Once everything is ready run:
echo "savedefault --default=0 --once" | grub --batch shutdown -r now
Once the box logs you out, start pinging the IP address. It will disappear and come back. Once you can ping it again, try to open up a VNC session. It can take a couple of minutes after the box is back up for it to actually allow vnc sessions. The VNC password is in the kickstart script on puppet1: "grep vnc /mnt/fedora/app/fi-repo/rhel/ks/xen-host":
If using the standard kickstart script, one can watch as the install completes itself, there should be no need to do anything. If using the xen-host-nohd script, one will need to configure the drives.
If all goes well, the vnc session will close, the box will reboot and come back up as the new host. The default root password is also listed in the kickstart script, from puppet1: grep rootpw /mnt/fedora/app/fi-repo/rhel/ks/xen-host Most physical machines are to be used as xen hosts, If that is the case with this host, just install puppet, update the box and follow the normal puppet instructions
Virtual Machine (domU)
Almost all of our virtual machines run off of LVM. Step 1 is to create the LVM partition you want.
lvcreate -n $NEWHOST -L 15G VolGroup00
Once the size of the new machine is set, we need to run the virtinstall. As before ensure that the ip listed below has access to the infrastructure.fedoraproject.org site. This can be tricky, normally the ip, route and netmask can be templated from the dom0. This is not the case at server beach (see below for clarification)
virt-install -p -n $NEWHOST -r 1024 -f /dev/VolGroup00/$NEWHOST --nographics -l http://infrastructure.fedoraproject.org/rhel/RHEL5-x86_64/ -x "ks=http://infrastructure.fedoraproject.org/rhel/ks/xen-guest-rhel ip=$IP netmask=255.255.255.0 gateway=$GATEWAY dns=$DNS1,$DNS2"
Or in PHX:
virt-install -p -n $NEWHOST -r 1024 -f /dev/xenGuests/$NEWHOST --nographics -l http://puppet1.fedora.phx.redhat.com/repo/rhel/RHEL5-x86_64/ -x "ks=http://puppet1.fedora.phx.redhat.com/repo/rhel/ks/xen-guest-rhel ip=$IP netmask=255.255.255.0 gateway=10.8.34.254 dns=10.8.4.90,10.8.4.100"
This install should be completely non-interactive.
The installation process is pretty simple, the post configuration may not be depending on if the box you've installed has a reverse DNS lookup. Here's the checklist:
1. Ensure the hostname is set properly in
1. Ensure the system is up to date and can contact its yum mirror
yum -y update .
1. For an external box make sure
search vpn.fedoraproject.org fedoraproject.org while internal hosts (in PHX) should contain
search fedora.phx.redhat.com (this should be scripted by the kickstart file! -matt)
Once the box is booted (virtual or not) follow the steps in the Puppet SOP
After puppet has done it's magic, set up the VPN. OpenVPN
fasClient -i to get all the home directories populated.
Server beach has some interesting network infrastructure as it relates to our ability to do virtualization. Basically the dom0 is given an ip on one network as normal but the virtual hosts (when we request IP's) are given an address on a different network and one without a gateway. The best bet is to make sure that you request at least one IP for the host to be a gateway. This is a terrible waste of an IP but until a better method is found this will work. Once you have your IP addresses all that is required is to create an aliased interface on the host with that IP.
/etc/sysconfig/network-scripts/ifcfg-eth0:1 A reboot later and you can treat this xen host as a normal xen host (with bridged networking and such)