ironic/install-guide/source/troubleshooting.rst

Troubleshooting

Once all the services are running and configured properly, and a node has been enrolled with the Bare Metal service and is in the available provision state, the Compute service should detect the node as an available resource and expose it to the scheduler.

Note

There is a delay, and it may take up to a minute (one periodic task cycle) for the Compute service to recognize any changes in the Bare Metal service's resources (both additions and deletions).

In addition to watching nova-compute log files, you can see the available resources by looking at the list of Compute hypervisors. The resources reported therein should match the bare metal node properties, and the Compute service flavor.

Here is an example set of commands to compare the resources in Compute service and Bare Metal service:

$ ironic node-list
+--------------------------------------+---------------+-------------+--------------------+-------------+
| UUID                                 | Instance UUID | Power State | Provisioning State | Maintenance |
+--------------------------------------+---------------+-------------+--------------------+-------------+
| 86a2b1bb-8b29-4964-a817-f90031debddb | None          | power off   | available          | False       |
+--------------------------------------+---------------+-------------+--------------------+-------------+

$ ironic node-show 86a2b1bb-8b29-4964-a817-f90031debddb
+------------------------+----------------------------------------------------------------------+
| Property               | Value                                                                |
+------------------------+----------------------------------------------------------------------+
| instance_uuid          | None                                                                 |
| properties             | {u'memory_mb': u'1024', u'cpu_arch': u'x86_64', u'local_gb': u'10',  |
|                        | u'cpus': u'1'}                                                       |
| maintenance            | False                                                                |
| driver_info            | { [SNIP] }                                                           |
| extra                  | {}                                                                   |
| last_error             | None                                                                 |
| created_at             | 2014-11-20T23:57:03+00:00                                            |
| target_provision_state | None                                                                 |
| driver                 | pxe_ipmitool                                                         |
| updated_at             | 2014-11-21T00:47:34+00:00                                            |
| instance_info          | {}                                                                   |
| chassis_uuid           | 7b49bbc5-2eb7-4269-b6ea-3f1a51448a59                                 |
| provision_state        | available                                                            |
| reservation            | None                                                                 |
| power_state            | power off                                                            |
| console_enabled        | False                                                                |
| uuid                   | 86a2b1bb-8b29-4964-a817-f90031debddb                                 |
+------------------------+----------------------------------------------------------------------+

$ nova hypervisor-show 1
+-------------------------+--------------------------------------+
| Property                | Value                                |
+-------------------------+--------------------------------------+
| cpu_info                | baremetal cpu                        |
| current_workload        | 0                                    |
| disk_available_least    | -                                    |
| free_disk_gb            | 10                                   |
| free_ram_mb             | 1024                                 |
| host_ip                 | [ SNIP ]                             |
| hypervisor_hostname     | 86a2b1bb-8b29-4964-a817-f90031debddb |
| hypervisor_type         | ironic                               |
| hypervisor_version      | 1                                    |
| id                      | 1                                    |
| local_gb                | 10                                   |
| local_gb_used           | 0                                    |
| memory_mb               | 1024                                 |
| memory_mb_used          | 0                                    |
| running_vms             | 0                                    |
| service_disabled_reason | -                                    |
| service_host            | my-test-host                         |
| service_id              | 6                                    |
| state                   | up                                   |
| status                  | enabled                              |
| vcpus                   | 1                                    |
| vcpus_used              | 0                                    |
+-------------------------+--------------------------------------+

Maintenance mode

Maintenance mode may be used if you need to take a node out of the resource pool. Putting a node in maintenance mode will prevent Bare Metal service from executing periodic tasks associated with the node. This will also prevent Compute service from placing a tenant instance on the node by not exposing the node to the nova scheduler. Nodes can be placed into maintenance mode with the following command. :

$ ironic node-set-maintenance $NODE_UUID on

A maintenance reason may be included with the optional --reason command line option. This is a free form text field that will be displayed in the maintenance_reason section of the node-show command.

$ ironic node-set-maintenance $UUID on --reason "Need to add ram."

$ ironic node-show $UUID

+------------------------+--------------------------------------+
| Property               | Value                                |
+------------------------+--------------------------------------+
| target_power_state     | None                                 |
| extra                  | {}                                   |
| last_error             | None                                 |
| updated_at             | 2015-04-27T15:43:58+00:00            |
| maintenance_reason     | Need to add ram.                     |
| ...                    | ...                                  |
| maintenance            | True                                 |
| ...                    | ...                                  |
+------------------------+--------------------------------------+

To remove maintenance mode and clear any maintenance_reason use the following command. :

$ ironic node-set-maintenance $NODE_UUID off