Ironic

Error returned from deploy ramdisk: Could+not+find+disk+to+use

Bug #1423809 reported by Naohiro Tamura on 2015-02-20

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	Ironic	Won't Fix	Medium	Unassigned
	diskimage-builder	Confirmed	Medium	Unassigned

Bug Description

pxe_ipmitool iscsi deploy failed due to "Error returned from deploy ramdisk: Could+not+find+disk+to+use".

The root cause of this problem is that the bare metal server has its local hard disk as /dev/sdc.
Please find the attached image.
https://launchpadlibrarian.net/198238406/deploy_ramdisk_error_sdc.png

2015-02-20 10:51:29.563 DEBUG oslo_messaging._drivers.amqp [-] UNIQUE_ID is da7fcb58dd6a4ba4af8a02c59665fb8c. from (pid=15228) _add_unique_id /usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqp.py:224
2015-02-20 10:51:29.565 ERROR ironic.drivers.modules.iscsi_deploy [-] Error returned from deploy ramdisk: Could+not+find+disk+to+u se.
2015-02-20 10:51:29.565 DEBUG ironic.common.states [-] Exiting old state 'deploying' in response to event 'fail' fr om (pid=15228) on_exit /opt/stack/ironic/ironic/common/states.py:157

Tentative fix can be as below:

diff --git a/ironic/drivers/modules/iscsi_deploy.py b/ironic/drivers/modules/iscsi_deploy.py
index d929f5a..98a6309 100644
--- a/ironic/drivers/modules/iscsi_deploy.py
+++ b/ironic/drivers/modules/iscsi_deploy.py
@@ -66,7 +66,7 @@ pxe_opts = [
                help='Maximum TTL (in minutes) for old master images in '
                'cache.'),
     cfg.StrOpt('disk_devices',
- default='cciss/c0d0,sda,hda,vda',
+ default='cciss/c0d0,sda,sdc,hda,vda',
                help='The disk devices to scan while doing the deploy.'),
     ]

See original description

Revision history for this message

Naohiro Tamura (naohirot) wrote on 2015-02-20:

/dev/sdc Edit (10.7 KiB, image/png)

description:

updated

Naohiro Tamura (naohirot) on 2015-02-20

description:

updated

Revision history for this message

Naohiro Tamura (naohirot) wrote on 2015-02-20:

If fundamental fix needs certain amount of time and effort, please assign this to me, I'll submit the above tentative fix as a short term solution.

Thanks.

Naohiro

Revision history for this message

Lucas Alvares Gomes (lucasagomes) wrote on 2015-02-20:

Adding TripleO as one of the projects affected because we will need to fix it in the find_disk() function of the DIB tool.

Right now the DIB tool look at the disk= kernel parameter which is passed by Ironic to find the disk, and it relies on the disk names. I think that DIB should just try to find a suitable disk, and not rely on any names.

It's important to note that Ironic will offer a way to pass hints to the deploy ramdisk in order to make it pick the right disk (if required), and that's explainded in more details in the spec merged in Ironic which is here http://specs.openstack.org/openstack/ironic-specs/specs/kilo/root-device-hints.html

Revision history for this message

Naohiro Tamura (naohirot) wrote on 2015-02-23:

Lucas,

Thank you for the comment and the information about Root device hints.

I read the Root device hints bp, source, and test cases.
And I understood that Root device hints improves the case that multiple boot devices are found, but not the case that no boot device is found.

Naohiro

Revision history for this message

Naohiro Tamura (naohirot) wrote on 2015-02-23:

Lucus,

Would you set the "Importance" of this bug report?

I'd like to ask you to set "High", because FUJITSU PRIMERGY server cannot be deployed.

Thanks.

Naohiro

Ramakrishnan G (rameshg87) (rameshg87) on 2015-02-23

affects:

tripleo → diskimage-builder

Revision history for this message

Ramakrishnan G (rameshg87) (rameshg87) wrote on 2015-02-23:

Naohiro, if it's just adding sdc to the list of 'disk_devices', then you can actually set it in your environment in /etc/ironic/ironic.conf and then restart conductor.

I think it's still useful if the operator can specifyt the disk_devices because linux kernel might name the block devices based on it's type - one some systems it might /dev/sdX, on some other /dev/vdX, on some other /dev/cciss.

We should enhance diskimage-builder to support glob options in disk_device. Something like below:
disk_device='cciss/c[0-9]d[0-9],sd[a-z],hd[a-z],vd[a-z]'

Dmitry Tantsur (divius) on 2015-02-23

Changed in ironic:
status:	New → Confirmed
importance:	Undecided → High

Revision history for this message

Ruby Loo (rloo) wrote on 2015-02-23:

I'm going to lower this to medium because high is described as ' High if the bug prevents a key feature from working properly for some users (or with a workaround)' [1], and the work around is to change the value of the config option (as mentioned by Ramakrishnan).

[1] https://wiki.openstack.org/wiki/BugTriage