Install and configure for Red Hat Enterprise Linux and CentOS

updated: 2019-06-04 03:05

Install and configure for Red Hat Enterprise Linux and CentOS¶

This section describes how to install and configure the Telemetry Alarming service, code-named aodh, on the controller node.

This section assumes that you already have a working OpenStack environment with at least the following components installed: Compute, Image Service, Identity.

Prerequisites¶

Before you install and configure the Telemetry service, you must create a database, service credentials, and API endpoints.

To create the database, complete these steps:
- Use the database access client to connect to the database server as the root user:
```
$ mysql -u root -p
```
- Create the aodh database:
```
CREATE DATABASE aodh;
```
- Grant proper access to the aodh database:
```
GRANT ALL PRIVILEGES ON aodh.* TO 'aodh'@'localhost' \
  IDENTIFIED BY 'AODH_DBPASS';
GRANT ALL PRIVILEGES ON aodh.* TO 'aodh'@'%' \
  IDENTIFIED BY 'AODH_DBPASS';
```
  Replace AODH_DBPASS with a suitable password.
- Exit the database access client.
Source the admin credentials to gain access to admin-only CLI commands:
```
$ . admin-openrc
```

To create the service credentials, complete these steps:

Create the aodh user:

$ openstack user create --domain default \
  --password-prompt aodh
User Password:
Repeat User Password:
+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| domain_id           | default                          |
| enabled             | True                             |
| id                  | b7657c9ea07a4556aef5d34cf70713a3 |
| name                | aodh                             |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+

Add the admin role to the aodh user:
```
$ openstack role add --project service --user aodh admin
```
Note

This command provides no output.

Create the aodh service entity:

$ openstack service create --name aodh \
  --description "Telemetry" alarming
+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | Telemetry                        |
| enabled     | True                             |
| id          | 3405453b14da441ebb258edfeba96d83 |
| name        | aodh                             |
| type        | alarming                         |
+-------------+----------------------------------+

Create the Alarming service API endpoints:

$ openstack endpoint create --region RegionOne \
  alarming public http://controller:8042
  +--------------+----------------------------------+
  | Field        | Value                            |
  +--------------+----------------------------------+
  | enabled      | True                             |
  | id           | 340be3625e9b4239a6415d034e98aace |
  | interface    | public                           |
  | region       | RegionOne                        |
  | region_id    | RegionOne                        |
  | service_id   | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
  | service_name | aodh                             |
  | service_type | alarming                         |
  | url          | http://controller:8042           |
  +--------------+----------------------------------+

$ openstack endpoint create --region RegionOne \
  alarming internal http://controller:8042
  +--------------+----------------------------------+
  | Field        | Value                            |
  +--------------+----------------------------------+
  | enabled      | True                             |
  | id           | 340be3625e9b4239a6415d034e98aace |
  | interface    | internal                         |
  | region       | RegionOne                        |
  | region_id    | RegionOne                        |
  | service_id   | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
  | service_name | aodh                             |
  | service_type | alarming                         |
  | url          | http://controller:8042           |
  +--------------+----------------------------------+

$ openstack endpoint create --region RegionOne \
  alarming admin http://controller:8042
  +--------------+----------------------------------+
  | Field        | Value                            |
  +--------------+----------------------------------+
  | enabled      | True                             |
  | id           | 340be3625e9b4239a6415d034e98aace |
  | interface    | admin                            |
  | region       | RegionOne                        |
  | region_id    | RegionOne                        |
  | service_id   | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
  | service_name | aodh                             |
  | service_type | alarming                         |
  | url          | http://controller:8042           |
  +--------------+----------------------------------+

Install and configure components¶

Note

Default configuration files vary by distribution. You might need to add these sections and options rather than modifying existing sections and options. Also, an ellipsis (…) in the configuration snippets indicates potential default configuration options that you should retain.

Install the packages:

# yum install openstack-aodh-api \
  openstack-aodh-evaluator openstack-aodh-notifier \
  openstack-aodh-listener openstack-aodh-expirer \
  python-aodhclient

Edit the /etc/aodh/aodh.conf file and complete the following actions:

In the [database] section, configure database access:
```
[database]
...
connection = mysql+pymysql://aodh:AODH_DBPASS@controller/aodh
```
Replace AODH_DBPASS with the password you chose for the Telemetry Alarming module database. You must escape special characters such as :, /, +, and @ in the connection string in accordance with RFC2396.
In the [DEFAULT] section, configure RabbitMQ message queue access:
```
[DEFAULT]
...
transport_url = rabbit://openstack:RABBIT_PASS@controller
```
Replace RABBIT_PASS with the password you chose for the openstack account in RabbitMQ.

In the [DEFAULT] and [keystone_authtoken] sections, configure Identity service access:

[DEFAULT]
...
auth_strategy = keystone

[keystone_authtoken]
...
www_authenticate_uri = http://controller:5000
auth_url = http://controller:5000
memcached_servers = controller:11211
auth_type = password
project_domain_id = default
user_domain_id = default
project_name = service
username = aodh
password = AODH_PASS

Replace AODH_PASS with the password you chose for the aodh user in the Identity service.

In the [service_credentials] section, configure service credentials:

[service_credentials]
...
auth_type = password
auth_url = http://controller:5000/v3
project_domain_id = default
user_domain_id = default
project_name = service
username = aodh
password = AODH_PASS
interface = internalURL
region_name = RegionOne

Replace AODH_PASS with the password you chose for the aodh user in the Identity service.

In order to initialize the database please run the aodh-dbsync script.

Finalize installation¶

Start the Telemetry Alarming services and configure them to start when the system boots:

# systemctl enable openstack-aodh-api.service \
  openstack-aodh-evaluator.service \
  openstack-aodh-notifier.service \
  openstack-aodh-listener.service
# systemctl start openstack-aodh-api.service \
  openstack-aodh-evaluator.service \
  openstack-aodh-notifier.service \
  openstack-aodh-listener.service

updated: 2019-06-04 03:05

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