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OpenStack Xena : Gnocchi 設定2021/10/11
 
時系列データベース [TDBaaS (Time Series Database as a Service)] Gnocchi をインストールします。
当例では以下のような環境を例に Network ノードに Gnocchi をインストールします。 
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Storage Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |      Open vSwitch     |   |        Libvirt        |
|  Memcached  httpd     |   |     Neutron Server    |   |     Nova Compute      |
|  Keystone   Glance    |   |       OVN-Northd      |   |      Open vSwitch     |
|  Nova API             |   |     Cinder Volume     |   |   OVN Metadata Agent  |
|  Cinder API           |   |    Heat API/Engine    |   |     OVN-Controller    |
|                       |   |    Gnocchi   httpd    |   |                       |
+-----------------------+   +-----------------------+   +-----------------------+
[1] Control ノードの Keystone に Gnocchi 用のユーザー等々を登録しておきます。
# [service] プロジェクト所属で [gnocchi] ユーザーを作成

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

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | 611e3ba8938b475fb9dd8124603f18d3 |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | b82510960a5f4502ab607a86b27bd0c5 |
| name                | gnocchi                          |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+
# [gnocchi] ユーザーを [admin] ロール に加える

root@dlp ~(keystone)#
openstack role add --project service --user gnocchi admin
# [gnocchi] 用サービスエントリ作成

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

+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | Metric Service                   |
| enabled     | True                             |
| id          | 884748d272f948b1952194d005ab86ff |
| name        | gnocchi                          |
| type        | metric                           |
+-------------+----------------------------------+
# Gnocchi API ホストを定義

root@dlp ~(keystone)#
export controller=10.0.0.50
# [gnocchi] 用エンドポイント作成 (public)

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

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 33f9c8f038944fd79922e2fa3ec819e7 |
| interface    | public                           |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 884748d272f948b1952194d005ab86ff |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | http://10.0.0.50:8041            |
+--------------+----------------------------------+
# [gnocchi] 用エンドポイント作成 (internal)

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

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | ab995d5598274537a44162f426c80b13 |
| interface    | internal                         |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 884748d272f948b1952194d005ab86ff |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | http://10.0.0.50:8041            |
+--------------+----------------------------------+
# [gnocchi] 用エンドポイント作成 (admin)

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

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | f86858506766471896967d2e24a61cc7 |
| interface    | admin                            |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 884748d272f948b1952194d005ab86ff |
| service_name | gnocchi                          |
| service_type | metric                           |
| url          | http://10.0.0.50:8041            |
+--------------+----------------------------------+
[2] Gnocchi 用のユーザーとデータベースを MariaDB に作成しておきます。
root@dlp ~(keystone)#
mysql 

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 109
Server version: 10.3.31-MariaDB-0ubuntu0.20.04.1 Ubuntu 20.04

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] Network ノードで Gnocchi サービスをインストールします。インストール中の問いには全て [No] で OK です。
root@network:~#
apt -y install gnocchi-api gnocchi-metricd python3-gnocchiclient
[4] Gnocchi の基本設定です。
root@network:~#
mv /etc/gnocchi/gnocchi.conf /etc/gnocchi/gnocchi.conf.org

root@network:~#
vi /etc/gnocchi/gnocchi.conf
# 新規作成

[DEFAULT]
log_dir = /var/log/gnocchi

[api]
auth_mode = keystone

[database]
backend = sqlalchemy

# MariaDB 接続情報
[indexer]
url = mysql+pymysql://gnocchi:password@10.0.0.30/gnocchi

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

# Keystone 認証情報
[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:~#
vi /etc/gnocchi/policy.json
# ポリシーを追記

{
    "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

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

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

root@network:~#
systemctl enable gnocchi-metricd

[4] Control ノードで動作確認します。
root@dlp ~(keystone)#
apt -y install python3-gnocchiclient

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

root@dlp ~(keystone)#
gnocchi resource list
# 何も表示されなければ問題なし
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