configure nova-compute use one vsphere cluster

[OpenStack Infra]

https://review.openstack.org/122242
commit 47c5088be0ec4486398b2db3196cfce82a661846
Author: Igor Zinovik <email address hidden>
Date: Wed Sep 17 03:07:28 2014 +0400

    configure nova-compute use one vsphere cluster

    - create separate directory '/etc/nova/nova-compute.d' where all
      configuration files that hold all configuration stanzas related to
      vmware compute driver
    - in simple mode we upload init script in appropriate directory and
      create symbolic links on it that are named like
      nova-compute-vmware-%cluster_id% ; script internally splits its own
      file name and extracts cluster name. This allow user to selectively
      start/stop nova-compute services.
    - Ubuntu init system (Upstart) requires initd service to be restarted,
      on CentOS we run '/bin/true'
    - create individual nova-compute configuration file per vSphere cluster;
      file is named `/etc/nova/nova-compute.d/vmware-%cluster_id%.conf',
      e.g. /etc/nova/nova-compute.d/vmware-0.conf
    - create appropriate corosync resource/primitive per nova-compute
      service in case of HA
    - currently we use same login and password for all nova-computes
    - set more strict access permissions (0600) on nova-compute.conf and
      generated files in `nova-compute.d' directory; these files hold
      sensitive information (credentials to vCenter server)
    - set 'multi_host' configuration stanza to False for both deployment
      modes (nonHA/HA)
    - add basic unit test coverage for provided functionality

    DocImpact
    Change-Id: I675dd2b7cdeacae1e703b82001dc2c855511e320
    Impelements: blueprint 1-1-nova-compute-vsphere-cluster-mapping

[Irina Povolotskaya (ipovolotskaya)]

AFAIK, this will be introduced in 6.1.
Nevertheless, I already have all stuff written (for 6.0)https://review.openstack.org/#/c/130446/
Once there are some major changes, please let me know.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/130446
Committed: https://git.openstack.org/cgit/stackforge/fuel-docs/commit/?id=4f09f4c562b80808f2411099eb8d6a477c539333
Submitter: Jenkins
Branch: master

commit 4f09f4c562b80808f2411099eb8d6a477c539333
Author: irina povolotskaya <email address hidden>
Date: Thu Oct 23 10:55:28 2014 +0400

    Describes nova-compute-vCenter mapping

    * Remove limitation about 1-1 mapping in Planning Guide
    * Add description and scheme into Operations Guide

    Change-Id: If2936189068c0826a98e9caa264827baab554933
    Implements: blueprint 1-1-nova-compute-vsphere-cluster-mapping
    Closes-Bug: 1403928