Ubuntu 18.04
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OpenStack Stein : Configure Gnocchi
2019/04/18
 
Install TDBaaS (Time Series Database as a Service), Gnocchi.
This example is based on the emvironment like follows.
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Network Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |      Linux Bridge     |   |        Libvirt        |
|  Memcached  httpd     |   |        L2 Agent       |   |     Nova Compute      |
|  Keystone   Glance    |   |        L3 Agent       |   |      Linux Bridge     |
|  Nova_API  Cinder_API |   |     Metadata Agent    |   |        L2 Agent       |
|  Neutron Server       |   |     Cinder Volume     |   |                       |
|  Metadata Agent       |   |        Heat API       |   |                       |
|                       |   |      Heat Engine      |   |                       |
|                       |   |    Gnocchi  httpd     |   |                       |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Add users and others for Gnocchi in Keystone.
# add gnocchi user (set in service project)

root@dlp ~(keystone)#
openstack user create --domain default --project service --password servicepassword gnocchi

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | efc5c6a05d444cae80c0a80f49ba87d4 |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | b767dcfa8d224d5087abacd74ed83b1a |
| name                | gnocchi                          |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+

# add gnocchi user in admin role

root@dlp ~(keystone)#
openstack role add --project service --user gnocchi admin
# add service entry for gnocchi

root@dlp ~(keystone)#
openstack service create --name gnocchi --description "Metric Service" metric

+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | Metric Service                   |
| enabled     | True                             |
| id          | e0da790585944f278f28094a3c3d08c0 |
| name        | gnocchi                          |
| type        | metric                           |
+-------------+----------------------------------+

# define Gnocchi API Host

root@dlp ~(keystone)#
export controller=10.0.0.50
# add endpoint for gnocchi (public)

root@dlp ~(keystone)#
openstack endpoint create --region RegionOne metric public http://$controller:8041

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 2938b5443d814fdf8b4d878a7a2bb9d2 |
| interface    | public                           |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | e0da790585944f278f28094a3c3d08c0 |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | http://10.0.0.50:8041            |
+--------------+----------------------------------+

# add endpoint for gnocchi (internal)

root@dlp ~(keystone)#
openstack endpoint create --region RegionOne metric internal http://$controller:8041

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 43977efb443e4bd6aebe675114789372 |
| interface    | internal                         |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | e0da790585944f278f28094a3c3d08c0 |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | http://10.0.0.50:8041            |
+--------------+----------------------------------+

# add endpoint for gnocchi (admin)

root@dlp ~(keystone)#
openstack endpoint create --region RegionOne metric admin http://$controller:8041

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | a050bee9981849aabb813480336ad7f8 |
| interface    | admin                            |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | e0da790585944f278f28094a3c3d08c0 |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | http://10.0.0.50:8041            |
+--------------+----------------------------------+
[2] Add a User and Database on MariaDB for Gnocchi.
root@dlp ~(keystone)#
mysql -u root -p

Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 176
Server version: 10.1.38-MariaDB-0ubuntu0.18.04.1 Ubuntu 18.04

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>
create database gnocchi;

Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]>
grant all privileges on gnocchi.* to gnocchi@'localhost' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
grant all privileges on gnocchi.* to gnocchi@'%' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
flush privileges;

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
exit

Bye
[3] Install Gnocchi. For selection during installation, it's OK with [No] to all.
root@network:~#
apt -y install gnocchi-api gnocchi-metricd python3-gnocchiclient
[4] Configure Gnocchi.
root@network:~#
mv /etc/gnocchi/gnocchi.conf /etc/gnocchi/gnocchi.conf.org

root@network:~#
vi /etc/gnocchi/gnocchi.conf
# create new

[DEFAULT]
log_dir = /var/log/gnocchi

[api]
auth_mode = keystone

[database]
backend = sqlalchemy

# MariaDB connection info
[indexer]
url = mysql+pymysql://gnocchi:password@10.0.0.30/gnocchi

[storage]
driver = file
file_basepath = /var/lib/gnocchi

# Keystone auth info
[keystone_authtoken]
www_authenticate_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:5000
memcached_servers = 10.0.0.30:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = gnocchi
password = servicepassword
service_token_roles_required = true

root@network:~#
chmod 644 /etc/gnocchi/gnocchi.conf

root@network:~#
chgrp gnocchi /etc/gnocchi/gnocchi.conf

root@network:~#
su -s /bin/bash gnocchi -c "gnocchi-upgrade"

root@network:~#
systemctl restart gnocchi-metricd apache2

root@network:~#
systemctl enable gnocchi-metricd

[4] Verify working on Control Node.
root@dlp ~(keystone)#
apt -y install python3-gnocchiclient

root@dlp ~(keystone)#
export OS_AUTH_TYPE=password

root@dlp ~(keystone)#
gnocchi resource list
# OK if no error is shown

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