[MAPR] Can't create cluster without volumes

[Andrew Lazarev]

Steps to repro:
1. Try to create MapR cluster (4.0.2.mrv2). Use flavor without any volumes. Don't ask for volumes in Sahara.

Observed behavior:
2015-04-01 15:32:45.949 6608 DEBUG sahara.context [-] Thread init-mfs-9997e9df-c53b-4823-ab4c-a7a5cf84e19e failed with exception: RemoteCommandException: Error during command execution: "/opt/mapr/server/disksetup -F /tmp/disk.list"
Return code: 1
STDOUT:
Error 117, Structure needs cleaning.
Traceback (most recent call last):
  File "/opt/mapr/server/disksetup", line 1253, in <module>
    RunDiskSetup();
  File "/opt/mapr/server/disksetup", line 1138, in RunDiskSetup
    GroupDisksAndCreateSPs(force);
  File "/opt/mapr/server/disksetup", line 650, in GroupDisksAndCreateSPs
    primary = FormatSPOnDisks(gdisks[index:last], cid, force);
  File "/opt/mapr/server/disksetup", line 609, in FormatSPOnDisks
    CreateRaid0DG(deviceList);
  File "/opt/mapr/server/disksetup", line 335, in CreateRaid0DG
    SetCurrDiskPath(deviceList[0]);
IndexError: list index out of range

Error ID: 16b7a867-a5c6-41cc-9195-6740970332c9 _wrapper /Users/alazarev/openstack/sahara/sahara/context.py:193

[Artem Osadchiy (aosadchiy)]

MapR file system requires at least one separate partition or disk to start. In the case of zero-sized ephemeral drives and absence of other volumes cluster fails. It's normal behavior for MapR. I think I have to add the validation rule to prevent such failures

[Andrew Lazarev (alazarev)]

>In the case of zero-sized ephemeral drives

Ephemeral drive was not zero-sized.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/170473

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/170473
Committed: https://git.openstack.org/cgit/openstack/sahara/commit/?id=4d9dd41ef30a0946630412d6517dc1b0114299b7
Submitter: Jenkins
Branch: master

commit 4d9dd41ef30a0946630412d6517dc1b0114299b7
Author: Artem Osadchyi <email address hidden>
Date: Fri Apr 3 15:12:37 2015 +0300

    Validate node groups without volumes

    MapR FS requires at least 1 separate partition or drive
    to be deployed successfully. Hence, if there are neither
    Cinder volumes nor ephemeral drive appended, cluster has
    to be considered invalid

    Change-Id: I9fac12be36b2e1f002db40cfdceecd662b7e7ee3
    Closes-Bug: #1439433

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/496036

[OpenStack Infra (hudson-openstack)]

Change abandoned by Jeremy Freudberg (<email address hidden>) on branch: master
Review: https://review.openstack.org/496036
Reason: Abandoning for inactivity... the bug is simple enough that if the issue comes to the forefront again, we'll probably remember the solutions without seeing this patch immediately in the queue