EXT4-fs errors occur while removing node from environment.

[Nikolay Fedotov]

ISO: {"build_id": "2013-12-19_00-01-41", "ostf_sha": "a611ed5e71d73c0fd2156f44aac37f875d9f4034", "build_number": 166, "nailgun_sha": "d9c0e796c46b458022a783aeb2bf740ac4e5fc21", "fuelmain_sha": "56503bacf29b134a37be8f751d43ac80e81c3b02", "astute_sha": "5be37f973ef2548cf74bea6f71161d20e90925f9", "release": 4.0, "fuellib_sha": "358b6ce641e58242bf743e392f76eafb9bb7fb3b"}

*steps*
- create environment with default settings
- add nodes: 1 controller, 1 compute
- deploy changes
- delete compute node
- deploy changes

*result*
the deleted node does not reboot. EXT4-fs errors occur

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/63061

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/63061
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=43cbc249ca3620721e9ca5c3be908bb7865889ee
Submitter: Jenkins
Branch: master

commit 43cbc249ca3620721e9ca5c3be908bb7865889ee
Author: Vladimir Kuklin <email address hidden>
Date: Thu Dec 19 11:45:28 2013 +0400

    Make node deletion more stable

    1. Use direct I/O for MBR erasing
    2. Create pre-erase hook to avoid using
       of corrupted fs binaries
    3. Use sysrq trigger to force node
       reset thus avoiding hanging reboot

    Change-Id: Iafad920d9f2021bea374f58f828e5d33b820959d
    Closes-bug: #1262524

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/63438

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/63438
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=a9cb3aad39b0fe9fc8c8399ef6d6e75850a1ed6d
Submitter: Jenkins
Branch: master

commit a9cb3aad39b0fe9fc8c8399ef6d6e75850a1ed6d
Author: Vladimir Kuklin <email address hidden>
Date: Fri Dec 20 19:21:09 2013 +0400

    Reboot node with ruby calls

    Change-Id: I7d9191f8bc62f3f812556d56f20a21b8243f1a7b
    Closes-bug: #1262524

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/63702

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/63702
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=9000b12aa0f3639bd4a18efeb82ef554fdbde9c0
Submitter: Jenkins
Branch: master

commit 9000b12aa0f3639bd4a18efeb82ef554fdbde9c0
Author: Vladimir Kuklin <email address hidden>
Date: Mon Dec 23 14:25:35 2013 +0400

    Disable sync and add kernel panic timeout

    Change-Id: I5ff397d75ed31a3e4f12ecc81a74723fc766fad7
    Related-bug: #1262524

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/64036

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/4.0
Review: https://review.openstack.org/64037

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/64036
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=8b9185d462bc8b070f91083b433f83c48715ffea
Submitter: Jenkins
Branch: master

commit 8b9185d462bc8b070f91083b433f83c48715ffea
Author: Vladimir Kuklin <email address hidden>
Date: Wed Dec 25 18:52:00 2013 +0400

    Move enabling of sysrq trigger into the parent method

    Change-Id: I700e83fab21eb48381e2f863857ab78867b0f156
    Closes-bug: #1262524

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/64037
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=6ce36837882399e0d3bb1ffdb2c3b2d8dcb84b54
Submitter: Jenkins
Branch: stable/4.0

commit 6ce36837882399e0d3bb1ffdb2c3b2d8dcb84b54
Author: Vladimir Kuklin <email address hidden>
Date: Wed Dec 25 18:52:00 2013 +0400

    Move enabling of sysrq trigger into the parent method

    Change-Id: I700e83fab21eb48381e2f863857ab78867b0f156
    Closes-bug: #1262524