Ubuntu 22.04
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OpenStack Yoga : Configure Gnocchi2022/05/07
 
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  |     |      Open vSwitch     |     |        Libvirt        |
|  Memcached  httpd     |     |     Neutron Server    |     |      Nova Compute     |
|  Keystone   Glance    |     |      OVN-Northd       |     |      Open vSwitch     |
|  Nova API  Cinder API |     |     Cinder Volume     |     |   OVN Metadata Agent  |
|                       |     |     Gnocchi httpd     |     |     OVN-Controller    |
+-----------------------+     +-----------------------+     +-----------------------+
[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  | c1c4d9a5313f43bd9f6f555e2d34ab28 |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | bbe4504bc4d045e999cb0bb71517beca |
| 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          | 7e3b16a7726c41c4ae48fac11596d2dd |
| 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           | 11ae708e6be045d39657ef31db333c58 |
| interface    | public                           |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 7e3b16a7726c41c4ae48fac11596d2dd |
| 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           | cc6fe624a0774549978c3ed7e6927968 |
| interface    | internal                         |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 7e3b16a7726c41c4ae48fac11596d2dd |
| 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           | 622203f1e04645ee9f291524044a9ffb |
| interface    | admin                            |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 7e3b16a7726c41c4ae48fac11596d2dd |
| 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 105
Server version: 10.6.7-MariaDB-2ubuntu1 Ubuntu 22.04

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 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
root@network:~#
vi /etc/apache2/sites-available/gnocchi-api.conf
# line 1 : change

Listen
127.0.0.1:8041
root@network:~#
vi /etc/gnocchi/policy.json
# add policies

{
    "admin_or_creator": "role:admin or user:%(creator)s or project_id:%(created_by_project_id)s",
    "resource_owner": "project_id:%(project_id)s",
    "metric_owner": "project_id:%(resource.project_id)s",

    "get status": "role:admin",

    "create resource": "",
    "get resource": "rule:admin_or_creator or rule:resource_owner",
    "update resource": "rule:admin_or_creator",
    "delete resource": "rule:admin_or_creator",
    "delete resources": "rule:admin_or_creator",
    "list resource": "rule:admin_or_creator or rule:resource_owner",
    "search resource": "rule:admin_or_creator or rule:resource_owner",

    "create resource type": "role:admin",
    "delete resource type": "role:admin",
    "update resource type": "role:admin",
    "list resource type": "",
    "get resource type": "",

    "get archive policy": "",
    "list archive policy": "",
    "create archive policy": "role:admin",
    "update archive policy": "role:admin",
    "delete archive policy": "role:admin",

    "create archive policy rule": "role:admin",
    "get archive policy rule": "",
    "list archive policy rule": "",
    "update archive policy rule": "role:admin",
    "delete archive policy rule": "role:admin",

    "create metric": "",
    "delete metric": "rule:admin_or_creator",
    "get metric": "rule:admin_or_creator or rule:metric_owner",
    "search metric": "rule:admin_or_creator or rule:metric_owner",
    "list metric": "rule:admin_or_creator or rule:metric_owner",

    "get measures":  "rule:admin_or_creator or rule:metric_owner",
    "post measures":  "rule:admin_or_creator"
}
root@network:~#
chmod 640 /etc/gnocchi/gnocchi.conf

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

[5] Configure Nginx for proxy settings.
root@network:~#
vi /etc/nginx/nginx.conf
# add into the [stream] section

stream {
    upstream neutron-api {
        server 127.0.0.1:9696;
    }
    server {
        listen 10.0.0.50:9696 ssl;
        proxy_pass neutron-api;
    }
    upstream gnocchi-api {
        server 127.0.0.1:8041;
    }
    server {
        listen 10.0.0.50:8041 ssl;
        proxy_pass gnocchi-api;
    }
    ssl_certificate "/etc/letsencrypt/live/network.srv.world/fullchain.pem";
    ssl_certificate_key "/etc/letsencrypt/live/network.srv.world/privkey.pem";
}
[6] Add Data into Database and start Gnocchi services.
root@network:~#
su -s /bin/bash gnocchi -c "gnocchi-upgrade"

root@network:~#
a2enmod wsgi

root@network:~#
a2ensite gnocchi-api

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

root@network:~#
systemctl enable gnocchi-metricd

[7] 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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