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=====================
Leap Cloudadmin Tools
=====================
Tools to clone a new kvm instance from an existing baseimage
Outline
=======
Cloning Images will take these steps:
* Clone Disk and xml-config from (inactive) Domain leap-baseimage-wheezy, using virt-clone
* Use sfdisk to grow the root partition.
* Create second disk (vfat-formatted), put the files meta-data and user-data on it
* Start new Domain and attach second disk to it
* Cloud-init will start at the end of the boot process, find the disk containing userdata, and configure the Domain:
** set up timezone
** setting a default locale
** setting hostname
** editing /etc/hosts for fqdn
** sets root password
** generate ssh host keys
** adding ssh keys to /root.ssh/authorized_keys so they can log in
** apt-get update/upgrade
Setup (once)
============
* We need util-linux from wheezy, because of the "sfdisk-feature":
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/686124 which lets us script the growing of the root partition.
apt-get install dosfstools mtools
apt-get install -t wheezy util-linux
echo "mtools_skip_check=1">~/.mtoolsrc
mkdir /var/lib/libvirt/cloudinit
chown libvirt-qemu /var/lib/libvirt/cloudinit
* Clone repository
git clone git://code.leap.se/leap_cloudadmin /usr/local/bin/leap_cloudadmin
ln -s /usr/local/bin/leap_cloudadmin/create-guest-with-cloudinit /usr/local/bin/create-guest-with-cloudinit
Clone Instance
==============
* edit /etc/cloudinit/NAME.cfg, using vmtest.cfg.example from this repository as template:
cp /usr/local/bin/leap_cloudadmin/vmtest.cfg.example /etc/cloudinit/NAME.cfg
* create new VM:
/usr/local/bin/create-guest-with-cloudinit -s 7 NAME
* see /var/log/cloud-init.log on guest for information on cloudinit run
Modify Userdata later, if needed
================================
mount -o loop /var/lib/libvirt/cloudinit/cloudinit-test-user-data.img /mnt
Configure new guest
===================
Networking
----------
* By default, eth0 uses NATed networking through the host virbr0.
It gets an dynamic IP throught dhcp, and can access the internet through that.
* To assign a static IP, either configure it in the condig file (recommended), or
add it later after logging into the vm. Add according entry to /etc/network/interfaces, i.e.:
allow-hotplug eth1
iface eth1 inet static
address 94.103.43.9
netmask 255.255.255.0
network 94.103.43.0
broadcast 94.103.43.255
gateway 94.103.43.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 8.8.8.8 8.8.4.4
dns-search leap.se
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