Boot from Ubuntu volume on baremetal node incomplete

[Ramamani Yeleswarapu]

Spawning an instance on baremetal node to boot from a cinder volume doesn't find the root device and drops to shell with <initramfs> prompt:

---------------------------------
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Gave up waiting for root device. Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
   - Check root= (did the system wait for the right device?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-label/cloudimg-rootfs does not exist. Dropping to a shell!

BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs)
---------------------------------

Same outcome for pre-built or Disk Image Builder created image of Ubuntu.

$ sudo wget http://cloud-images.ubuntu.com/trusty/current/trusty-server-cloudimg-amd64-disk1.img
$ glance image-create --name trusty-server-cloudimg-amd64 --visibility public --disk-format qcow2 --container-format bare < trusty-server-cloudimg-amd64-disk1.img
$ openstack volume create --size 10 --image d1bd7d56-2888-44ae-93e8-7ddb0c8b7643 --bootable trustyimg
$ openstack server create --flavor baremetal --nic $net_id --volume trustyimg --key-name default trustyserver

Console output:
http://paste.openstack.org/show/620966/
http://paste.openstack.org/show/620967/

[Hironori Shiina (shiina-hironori)]

A workaround is creating an image manually[1] with the following setup before shutting down the instance.

apt-get install open-iscsi -y
echo "ISCSI_AUTO=true" > /etc/iscsi/iscsi.initramfs
update-initramfs -u

[1] https://docs.openstack.org/image-guide/ubuntu-image.html

[Julia Kreger (juliaashleykreger)]

Discussion from the ironic boot from volume meeting last week indicated that mjturek would work on a dib element to help automate this for users.

[Ruby Loo (rloo)]

No patch has been submitted for this yet, so changing status to 'Triaged'.

[Michael Turek (mjturek)]

Hey Ruby,

So I think we're solving this solely through a diskimage-builder patch [0] though there may be some work needed on the ironic side to properly test the element. I'm going to set it to 'In Progress' but please revert if you disagree!

[0] https://review.openstack.org/#/c/511494

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/511494
Committed: https://git.openstack.org/cgit/openstack/diskimage-builder/commit/?id=91e3b72a23a4bde3c811cedf2224f682aa4d99b7
Submitter: Zuul
Branch: master

commit 91e3b72a23a4bde3c811cedf2224f682aa4d99b7
Author: Michael Turek <email address hidden>
Date: Thu Oct 12 10:38:23 2017 -0400

    Add iscsi-boot element

    This patch adds an element that handles the configuration for
    creating a disk capable of being a remote root filesystem through
    iSCSI on Ubuntu and Debian images.

    Change-Id: Ibf9e39d2bdab530106015f156d23d28029d12b0d
    Closes-bug: #1716794