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second compute added, command "nova-status upgrade check" warning for Check: Resource Providers

asked 2017-08-08 15:04:04 -0600

daniel hernandez gravatar image

Hi there, I want you guys asked about Cell_V2. Recently I added a second compute node to Ocata/Ubuntu deployment followed oficial Openstack guide. it was OK with only one compute node. Also now compute nodes are OK: root@controller:~# openstack compute service list

| ID | Binary | Host | Zone | Status | State | Updated At |

| 3 | nova-consoleauth | controller | internal | enabled | up | 2017-08-08T19:20:44.000000 |

| 4 | nova-scheduler | controller | internal | enabled | up | 2017-08-08T19:20:45.000000 |

| 5 | nova-conductor | controller | internal | enabled | up | 2017-08-08T19:20:44.000000 |

| 6 | nova-compute | compute | nova | enabled | up | 2017-08-08T19:20:45.000000 |

| 7 | nova-compute | compute2 | nova | enabled | up | 2017-08-08T19:20:49.000000 |

nova cell is OK too

root@controller:~# nova-manage cell_v2 list_cells

| Name | UUID |

| cell0 | 00000000-0000-0000-0000-000000000000

| cell1 | e518718f-4c4e-404f-8a4e-78e71d50c7cc |

However for command "nova-status upgrade check". there is a messages that second compute node cannot be use

| Upgrade Check Results |

| Check: Cells v2 | Result: Success | Details: None |

| Check: Placement API | Result: Success | Details: None |

| Check: Resource Providers | | Result: Warning |

| Details: There are 1 compute resource providers and 2 compute nodes in the deployment. Ideally the number of compute resource providers should equal the number of enabled compute nodes otherwise the cloud may be underutilized. |

I checked question related to cell/Placement in Ask.openstack.org but not find any similar issue answered. how can I added second or subsequently compute node to Cell_V2.

thanks in advance

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The added node is probably unable to get registered with the placement service. Look for relevant warning messages in its nova-compute log.

Bernd Bausch gravatar imageBernd Bausch ( 2017-08-08 18:16:24 -0600 )edit
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answered 2017-10-11 03:53:22 -0600

silently gravatar image

on new compute node ,executive as follow:

nova-manage cell_v2 discover_hosts --verbose
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answered 2017-10-08 17:20:04 -0600

Davidshu gravatar image

updated 2017-10-08 17:22:44 -0600

Hi,

I have same problem and solve after removing inactive host from the database. Try what @daniel suggest and if doesn't fix it please try the following method:

  1. Verify if you have 2 or 1 compute node?
  2. If you have 2 compute node please check that 2 node are alive/valid.
  3. If you only have valid 1 compute node please remove the invalid host through mysql:

Login to mysql and start finding.

> mysql -u root -pyour-password
> use nova;
> select * from compute_nodes;

Look carefully and find the invalid hypervisor hostname.

> DELETE FROM compute_nodes where hypervisor_hostname='compute-node-name′;

Then remove host mapping on nova_api database:

> use nova_api;
> select * from host_mappings;
> DELETE FROM host_mappings WHERE host='compute-node-name';

And after that please try to run nova-status check upgrade, if it doesn't fix the problem please ensure that os_region_name match with your region settings in both controller and compute node. HTH

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answered 2017-08-08 20:08:47 -0600

daniel hernandez gravatar image

Hi Bernd, I checked nova-compute log in compute2. I foung "The placement API endpoint not found. Placement is optional in Newton, but required in Ocata. Please enable the placement service before upgrading".
browsing on Ask.openstack.org for similar issue I found that issue source is "os_region_name = openstack" has to be commented or change to current region name used in deployment.

| Upgrade Check Results |

| Check: Cells v2 | | Result: Success | | Details: None |

| Check: Placement API | | Result: Success | | Details: None |

| Check: Resource Providers | | Result: Success | | Details: None |

thanks for your tip.

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Asked: 2017-08-08 15:04:04 -0600

Seen: 1,901 times

Last updated: Oct 11 '17

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