Blueprint changed by Scott Moser:
Whiteboard changed:
User Stories:
Rocky runs a MAAS cluster. The nodes have frequent turnover and installation
time is time lost. Faster installation means higher usage time.
Assumptions:
The fast path installer is intended to only support simplistic
cloud-image-like installation. Users wishing for for more complex partition
layout may need to use the debian installer path.
Risks:
bootloader installation is non-trivial. The debian installer does a good job
of doing this. If we can't re-use that logic we risk failing to boot. UEFI
boot is also complex and may be required for some systems.
Test Plans:
This code path will be used in the Ubuntu openstack CI framework to help it
install faster. That will prove at least one functional path. Additionally,
the code is testable inside kvm with a cloud-image serving as the bootable
system and installing to a target second disk in the system.
Release Note:
Nodes installed through MAAS can use the fast path installer to significantly
reduce installation time. It results in a cloud-image like environment with
customization available via cloud-init on first boot.
+
+
+ == How to use in maas ==
+ maas-cli maaslocal tags new name='use-fastpath-installer' comment='BE FASTER'
+ maas-cli maaslocal tag update-nodes use-fastpath-installer
add=node-a95b107a-ad20-11e2-9e40-2c768a4e4495
+ maas-cli maaslocal tag nodes use-fastpath-installer
+ ( cd /opt && sudo bzr branch lp:~smoser/+junk/xinstall xinstall )
+ xinstall_preseed="/usr/share/maas/preseeds/preseed_xinstall"
+ sudo dpkg-divert --rename --divert ${xinstall_preseed}.dist --add
${xinstall_preseed}
+ sudo tee "${xinstall_preseed}" <<"EOF"
+ {{py:
+ if http_proxy:
+ proxy = http_proxy
+ else:
+ proxy = "http://"+server_host+":8000/";
+ if node.distro_series:
+ release = node.distro_series
+ else:
+ release = "precise"
+ import subprocess
+ preseed = subprocess.check_output(["/opt/xinstall/make-userdata-maas",
+ "--apt-proxy="+proxy,
+ "--dpkg-selections="+preseed_data,
+ "--finished-url="+node_disable_pxe_url,
+ "--finished-url-data="+node_disable_pxe_data,
+
"http://"+cluster_host+"/MAAS/static/images/"+node.architecture+"/"+node.distro_series+"/xinstall/root.tar.gz";,
+ "/dev/vda"])
+ }}
+ {{preseed}}
+ EOF
+ links:
+ * maas tag doc: http://maas.ubuntu.com/docs/tags.html
--
fast server install for cloud-image like experience
https://blueprints.launchpad.net/ubuntu/+spec/servercloud-r-fastpath-install
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