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OpenStack Zed : Configure Gnocchi2023/06/30

 
Install TDBaaS (Time Series Database as a Service), Gnocchi.
This example is based on the environment like follows.
------------+--------------------------+--------------------------+------------
            |                          |                          |
        eth0|10.0.0.30             eth0|10.0.0.50             eth0|10.0.0.51
+-----------+-----------+  +-----------+-----------+  +-----------+-----------+
|   [ dlp.srv.world ]   |  | [ network.srv.world ] |  |  [ node01.srv.world ] |
|     (Control Node)    |  |     (Network Node)    |  |     (Compute Node)    |
|                       |  |                       |  |                       |
|  MariaDB    RabbitMQ  |  |  Neutron L2/L3 Agent  |  |        Libvirt        |
|  Memcached  Nginx     |  |   Neutron Metadata    |  |      Nova Compute     |
|  Keystone   httpd     |  |     Open vSwitch      |  |    Neutron L2 Agent   |
|  Glance     Nova API  |  |     iSCSI Target      |  |      Open vSwitch     |
|  Neutron Server       |  |     Cinder Volume     |  |                       |
|  Neutron Metadata     |  |     httpd  Gnocchi    |  |                       |
|  Cinder API           |  |                       |  |                       |
+-----------------------+  +-----------------------+  +-----------------------+

[1] Add users and others for Gnocchi in Keystone.
# create [gnocchi] user in [service] project

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

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | d8b09d86ed7743039f92b2e542ea26c1 |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | 98235d1d6194458fa14c8a3f292289db |
| name                | gnocchi                          |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+

# add [gnocchi] user in [admin] role

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

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

+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | Metric Service                   |
| enabled     | True                             |
| id          | 672c84ec6b74470797f69278b1d52eb5 |
| name        | gnocchi                          |
| type        | metric                           |
+-------------+----------------------------------+

# set Gnocchi API Host

root@dlp ~(keystone)#
export controller=network.srv.world
# create endpoint for [gnocchi] (public)

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

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 9f4488875a95463eb937c0d37f3994e9 |
| interface    | public                           |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 672c84ec6b74470797f69278b1d52eb5 |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | https://network.srv.world:8041   |
+--------------+----------------------------------+

# create endpoint for [gnocchi] (internal)

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

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 5dc88124ade54e79b9c37c0f95ce9fbb |
| interface    | internal                         |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 672c84ec6b74470797f69278b1d52eb5 |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | https://network.srv.world:8041   |
+--------------+----------------------------------+

# create endpoint for [gnocchi] (admin)

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

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 3d49edb40ac24304a992838b2e6a52b6 |
| interface    | admin                            |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 672c84ec6b74470797f69278b1d52eb5 |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | https://network.srv.world:8041   |
+--------------+----------------------------------+
[2] Add a User and Database on MariaDB for Gnocchi.
root@dlp ~(keystone)#
mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 217
Server version: 10.11.3-MariaDB-1 Debian 12

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 on Network Node. For questions during the installation, it's OK with [No] to all.
root@network:~#
apt -y install gnocchi-api gnocchi-metricd python3-gnocchiclient apache2 libapache2-mod-wsgi-py3
[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@dlp.srv.world/gnocchi

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

# Keystone auth info
[keystone_authtoken]
www_authenticate_uri = https://dlp.srv.world:5000
auth_url = https://dlp.srv.world: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
# if using self-signed certs on Apache2 Keystone, turn to [true]
insecure = false

[oslo_policy]
enforce_new_defaults = false

root@network:~#
vi /etc/apache2/sites-available/gnocchi-api.conf
# create new
# replace SSL/TLS certificate to yours

Listen 8041
<VirtualHost *:8041>
  <Directory /usr/bin>
    AllowOverride None
    Require all granted
  </Directory>

  SSLEngine on
  SSLHonorCipherOrder on
  SSLCertificateFile /etc/letsencrypt/live/network.srv.world/cert.pem
  SSLCertificateKeyFile /etc/letsencrypt/live/network.srv.world/privkey.pem
  SSLCertificateChainFile /etc/letsencrypt/live/network.srv.world/chain.pem

  CustomLog /var/log/apache2/gnocchi_wsgi_access.log combined
  ErrorLog /var/log/apache2/gnocchi_wsgi_error.log
  SetEnvIf X-Forwarded-Proto https HTTPS=1
  WSGIApplicationGroup %{GLOBAL}
  WSGIDaemonProcess gnocchi display-name=gnocchi_wsgi user=gnocchi group=gnocchi processes=6 threads=6
  WSGIProcessGroup gnocchi
  WSGIScriptAlias / /usr/bin/gnocchi-api
</VirtualHost>

root@network:~#
chmod 640 /etc/gnocchi/gnocchi.conf

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

[5] Add Data into Database and start Gnocchi services.
root@network:~#
su -s /bin/bash gnocchi -c "gnocchi-upgrade"

root@network:~#
a2enmod wsgi

root@network:~#
a2enmod ssl

root@network:~#
a2ensite gnocchi-api

root@network:~#
systemctl stop --now gnocchi-api

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

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

[6] Verify state 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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