Revision as of 19:36, 1 February 2012

Services Extension Documentation

Description

The services extension for Nova is a tool to provide additional visibility into a running Nova installation, providing metrics, version, and configuration information.

Installation

Server-Side

To use the service plugin, you must install the server-side extension into the nova/api/openstack/compute/contrib directory and then restart the API server.

Client-Side

To use the service plugin from novaclient, you must install the novaclient extension. The easiest way to do this is to run:

pip install rax_services_python_novaclient_ext

Usage

Listing Available Services

$ nova service-list

+----+-----------+---------+----------+--------------+---------------------+
| ID |   topic   |   host  | disabled | report_count |      updated_at     |
+----+-----------+---------+----------+--------------+---------------------+
| 1  | compute   | squeeze | False    | 704782       | 2012-02-01 19:14:28 |
| 2  | scheduler | squeeze | False    | 714968       | 2012-02-01 19:14:34 |
| 3  | network   | squeeze | False    | 714983       | 2012-02-01 19:14:26 |
| 4  | console   | squeeze | False    | 0            | None                |
+----+-----------+---------+----------+--------------+---------------------+

Showing Basic Service Info

This shows information common to all services.

$ nova service-show 1

+--------------+------------------------------------------+
|   Property   |                  Value                   |
+--------------+------------------------------------------+
| disabled     | False                                    |
| host         | squeeze                                  |
| href         | http://10.127.4.222:8774/v1.1/services/1 |
| id           | 1                                        |
| report_count | 704789                                   |
| topic        | compute                                  |
| updated_at   | 2012-02-01 19:15:39                      |
+--------------+------------------------------------------+

Show Additional Service Details

This will show any information specific to a particular service-type. For example, the compute service will include hypervisor information.

$ nova service-details 1

+------------------------+-------+
|        Property        | Value |
+------------------------+-------+
| cpu_info               | 8     |
| hypervisor_type        | xen   |
| hypervisor_version     | 0     |
| local_gb               | 265   |
| local_gb_used          | 23    |
| memory_mb              | 32767 |
| memory_mb_used         | 2216  |
| memory_mb_used_servers | 256   |
| vcpus                  | 0     |
| vcpus_used             | 0     |
+------------------------+-------+

List Servers Belonging to Compute Resource

nova service-servers 1
+--------------------------------------+------------+--------+-------------------+
|                  ID                  |    Name    | Status |      Networks     |
+--------------------------------------+------------+--------+-------------------+
| 855f28fd-1d89-4a7d-b5a5-f4dd54e83550 | apple      | ACTIVE | private=10.0.0.34 |
| dae7b332-de5d-4fdd-a82b-1354e5b69f88 | dewberry   | ACTIVE | private=10.0.0.37 |
| f057f9ca-77db-445c-9867-77da79006232 | cherry     | ACTIVE | private=10.0.0.36 |
| f64687c3-9f93-46a0-81b8-be65d8286a69 | blackberry | ACTIVE | private=10.0.0.35 |
+--------------------------------------+------------+--------+-------------------+

Show Service Configuration Information

This will show Nova's FLAG settings.

$ nova service-config 1

+------------------------+-------+
|        Property        | Value |
+------------------------+-------+
| flag                   | 0     |
+------------------------+-------+

Show Service Version

$ nova service-version 1
2012.1-dev