lorax/docs/fedora-livemedia-ec2.ks
Brian C. Lane 6f6af862c6 livemedia-creator: Remove random-seed from images (#1258986)
systemd uses /var/lib/systemd/random-seed to add entropy to /dev/urandom
at boot time. During image creation this file is created, and if not
removed everything using the image will be adding the same seed.

This is only additional entropy, NOT a seed in the sense of a starting
point for a PRNG, so it will be mixed with other entropy as the system
runs. It isn't a good idea to use the same value everywhere so make sure
it is removed in %post

Resolves: rhbz#1258986
2015-09-02 10:32:30 -07:00

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# Build a basic Fedora AMI using livemedia-creator
lang en_US.UTF-8
keyboard us
timezone --utc America/New_York
auth --useshadow --enablemd5
selinux --enforcing
firewall --service=ssh
bootloader --location=none
services --enabled=network,sshd,rsyslog
shutdown
# By default the root password is emptied
rootpw --plaintext removethispw
#
# Define how large you want your rootfs to be
# NOTE: S3-backed AMIs have a limit of 10G
#
clearpart --all --initlabel
part / --size 10000 --fstype ext4
part swap --size=512
#
# Repositories
url --url="http://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/x86_64/os/"
#
#
# Add all the packages after the base packages
#
%packages --nobase
@core
system-config-securitylevel-tui
audit
pciutils
bash
coreutils
kernel
e2fsprogs
passwd
policycoreutils
chkconfig
rootfiles
yum
vim-minimal
acpid
openssh-clients
openssh-server
curl
sudo
#Allow for dhcp access
dhclient
iputils
-firstboot
-biosdevname
# package to setup cloudy bits for us
cloud-init
grub
-dracut-config-rescue
%end
# more ec2-ify
%post --erroronfail
# create ec2-user
/usr/sbin/useradd ec2-user
/bin/echo -e 'ec2-user\tALL=(ALL)\tNOPASSWD: ALL' >> /etc/sudoers
# fstab mounting is different for x86_64 and i386
cat <<EOL > /etc/fstab
/dev/xvda1 / ext4 defaults 1 1
/dev/xvda2 /mnt ext3 defaults 0 0
/dev/xvda3 swap swap defaults 0 0
EOL
if [ ! -d /lib64 ] ; then
# workaround xen performance issue (bz 651861)
echo "hwcap 1 nosegneg" > /etc/ld.so.conf.d/libc6-xen.conf
fi
# Install grub.conf
# idle=nomwait is to allow xen images to boot and not try use cpu features that are not supported
INITRD=`ls /boot/initramfs-* | head -n1`
KERNEL=`ls /boot/vmlinuz-* | head -n1`
mkdir /boot/grub
pushd /boot/grub
cat <<EOL > grub.conf
default 0
timeout 0
title Fedora Linux
root (hd0)
kernel $KERNEL root=/dev/xvda1 idle=halt
initrd $INITRD
EOL
# symlink grub.conf to menu.lst for use by EC2 pv-grub
ln -s grub.conf menu.lst
popd
# the firewall rules get saved as .old without this we end up not being able
# ssh in as iptables blocks access
rename -v .old "" /etc/sysconfig/*old
# setup systemd to boot to the right runlevel
rm /etc/systemd/system/default.target
ln -s /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
# remove the root password
passwd -d root > /dev/null
%end
%post
# Remove random-seed
rm /var/lib/systemd/random-seed
%end