ogelbukh

1. Integrate with existing validation hook in the service class http://git.openstack.org/cgit/openstack/nova/tree/nova/service.py#n283
2. Minimize performance effect on CI gate tests
3. Consider upgrade implications, integrate with upgrade testing tools
4. Stand-alone tool which will also work across services
5. Discover components to validate configurations for (e.g. if Neutron is configured, then check Neutron credentials are correct)
6. Stand-alone tool which will be run after initial deployment
7. Track validated configurations and only revalidate if needed
8. Run validation during service startup unless that affects performance
9. catch following error types: a) duplicate/nonexistant options; b) invalid mix of settings
10. generic standalone tool for case a) is in nova/tools: https://git.openstack.org/cgit/openstack/nova/tree/tools/config/analyze_opts.py

ogelbukh

10.0.0.4:comp3
nova-compute-inst-175
nova-compute-inst-190 10.0.0.22, 10.49.252.89
nova-compute-inst-201
nova-compute-inst-209
nova-compute-inst-127

10.0.0.4:comp4
nova-compute-inst-27
nova-compute-inst-182

ogelbukh

(drbd-node1)# vgs
  VG           #PV #LV #SN Attr   VSize  VFree
  vg_shared      1   3   0 wz--nc  1.29t 1.04t
  vg_sys         1   2   0 wz--n- 19.97g 5.97g

ogelbukh

(drbd-node1)# vgchange -c y vg_shared

ogelbukh

(drbd-node1)# service cman start
Starting cluster:
   Checking if cluster has been disabled at boot...        [  OK  ]
   Checking Network Manager...                             [  OK  ]
   Global setup...                                         [  OK  ]
   Loading kernel modules...                               [  OK  ]
   Mounting configfs...                                    [  OK  ]
   Starting cman...                                        [  OK  ]
   Waiting for quorum...                                   [  OK  ]
   Starting fenced...                                      [  OK  ]

ogelbukh

global {
  ...
  locking_type = 3
  ...
  }

ogelbukh

compatibility: whitetank
totem {
  version: 2
  secauth: off
  threads: 0
  # fail_recv_const: 5000
  interface {
  ringnumber: 0
  bindnetaddr: 10.0.0.0
  mcastaddr: 226.94.1.1

ogelbukh

<?xml version="1.0"?>
<cluster name="cluster" config_version="1">
  <!-- post_join_delay: number of seconds the daemon will wait before
                        fencing any victims after a node joins the domain
       post_fail_delay: number of seconds the daemon will wait before
                        fencing any victims after a domain member fails
       clean_start    : prevent any startup fencing the daemon might do.
                        It indicates that the daemon should assume all nodes
                        are in a clean state to start. -->
  <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>

ogelbukh

(drbd-node1)# yum install clvmd
...
Dependencies Resolved

================================================================================
 Package               Arch         Version                 Repository     Size
================================================================================
Installing:
 lvm2-cluster          x86_64       2.02.84-1.fc15          fedora        331 k
Installing for dependencies:

ogelbukh

# vgchange -a y nova 
1 logical volume(s) in volume group "nova" now active