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OpenStack Zed : Trove 利用方法
2022/10/12
 
OpenStack Database Service(Trove)の利用方法です。
当例では以下のような環境を例に Trove をインストールしています。
------------+-----------------------------+-----------------------------+------------
            |                             |                             |
        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  Nginx     |     |     Neutron Server    |     |      Nova Compute     |
|  Keystone   httpd     |     |      OVN-Northd       |     |      Open vSwitch     |
|  Glance     Nova API  |     |  Nginx  iSCSI Target  |     |   OVN Metadata Agent  |
|  Cinder API           |     |     Cinder Volume     |     |     OVN-Controller    |
|                       |     |     Trove Services    |     |                       |
+-----------------------+     +-----------------------+     +-----------------------+

[1] Trove 用の VM イメージを公式サイトからダウンロードして Glance に登録します。
また、[trove.conf] で [cinder_volume_type] に設定したボリュームタイプを作成しておきます。
root@dlp ~(keystone)#
wget https://tarballs.opendev.org/openstack/trove/images/trove-master-guest-ubuntu-focal.qcow2

root@dlp ~(keystone)#
openstack image create Trove-Ubuntu --file=trove-master-guest-ubuntu-focal.qcow2 --disk-format=qcow2 --container-format=bare --tag=trove --private
root@dlp ~(keystone)#
openstack image list

+--------------------------------------+--------------+--------+
| ID                                   | Name         | Status |
+--------------------------------------+--------------+--------+
| 13992db5-8056-4d23-8411-15403d0cd5b8 | Trove-Ubuntu | active |
| 126bc335-fc00-478d-b84a-a9e79eba2574 | Ubuntu2204   | active |
+--------------------------------------+--------------+--------+

[root@dlp ~(keystone)]#
openstack volume type create lvm-trove --private

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 2059cde5-9f29-4c53-8f3f-c234176d4ad2 |
| is_public   | False                                |
| name        | lvm-trove                            |
+-------------+--------------------------------------+
[2] Trove API が稼働するノード (当例では Network ノード) で、使用したいデータストアを登録しておきます。
当例では、MariaDB, MySQL をデータストアとして登録します。
# データストア登録

root@network:~#
su -s /bin/bash trove -c "trove-manage datastore_update mariadb ''"

Datastore 'mariadb' updated.
root@network:~#
su -s /bin/bash trove -c "trove-manage datastore_update mysql ''"

Datastore 'mysql' updated.
# 各データストアのバージョンを登録

# [13992db5-***] の部分は [2] で作成した Trove 用のイメージ ID

root@network:~#
su -s /bin/sh -c "trove-manage datastore_version_update mariadb 10.3 mariadb 13992db5-8056-4d23-8411-15403d0cd5b8 mariadb 1" trove

Datastore version '10.3(10.3)' updated.
root@network:~#
su -s /bin/sh -c "trove-manage datastore_version_update mariadb 10.5 mariadb 13992db5-8056-4d23-8411-15403d0cd5b8 mariadb 1" trove

Datastore version '10.5(10.5)' updated.
root@network:~#
su -s /bin/sh -c "trove-manage datastore_version_update mysql 8.0 mysql 13992db5-8056-4d23-8411-15403d0cd5b8 mysql 1" trove

Datastore version '8.0(8.0)' updated.
# 各データストアのバージョン用の設定パラメーターを登録

root@network:~#
su -s /bin/bash trove -c "trove-manage db_load_datastore_config_parameters mariadb 10.3 /usr/lib/python3/dist-packages/trove/templates/mariadb/validation-rules.json"

Loading config parameters for datastore (mariadb) version (10.3)
root@network:~#
su -s /bin/bash trove -c "trove-manage db_load_datastore_config_parameters mariadb 10.5 /usr/lib/python3/dist-packages/trove/templates/mariadb/validation-rules.json"

Loading config parameters for datastore (mariadb) version (10.5)
root@network:~#
su -s /bin/bash trove -c "trove-manage db_load_datastore_config_parameters mysql 8.0 /usr/lib/python3/dist-packages/trove/templates/mysql/validation-rules.json"

Loading config parameters for datastore (mysql) version (8.0)
# VM イメージ用の [cloudinit] ファイル作成

root@network:~#
mkdir /etc/trove/cloudinit

root@network:~#
vi /etc/trove/cloudinit/mariadb.cloudinit
# 新規作成

# [CONTROLLER] に Trove API ホストを指定

#cloud-config
runcmd:
  - echo 'CONTROLLER=network.srv.world' > /etc/trove/controller.conf
  - chmod 644 /etc/trove/controller.conf

root@network:~#
cp /etc/trove/cloudinit/mariadb.cloudinit /etc/trove/cloudinit/mysql.cloudinit

root@network:~#
chown -R trove /etc/trove/cloudinit

[3] 任意のノードで、データベースインスタンスを作成します。
例として、[admin] ユーザーで MariaDB データベースインスタンスを作成します。
(デフォルトポリシーでは [admin] ユーザーのみがインスタンス作成可)
ちなみに、データベースインスタンスは VM イメージ上で Docker コンテナーとして起動します。
root@dlp ~(keystone)#
openstack datastore list

+--------------------------------------+------------+
| ID                                   | Name       |
+--------------------------------------+------------+
| 249f318b-e209-44b4-a24a-d320dc38a1d3 | mysql      |
| 2d921feb-319b-4dac-aaa3-4e814ef2b9c6 | mariadb    |
+--------------------------------------+------------+

root@dlp ~(keystone)#
openstack datastore version list mariadb

+--------------------------------------+------+---------+
| ID                                   | Name | Version |
+--------------------------------------+------+---------+
| e6e070a8-39e8-4366-8126-163399b573b7 | 10.3 | 10.3    |
| 0c2c0c0d-e0a4-444b-91d5-1c002a7dc75d | 10.5 | 10.5    |
+--------------------------------------+------+---------+

root@dlp ~(keystone)#
openstack flavor list

+----+----------+------+------+-----------+-------+-----------+
| ID | Name     |  RAM | Disk | Ephemeral | VCPUs | Is Public |
+----+----------+------+------+-----------+-------+-----------+
| 0  | m1.small | 2048 |   10 |         0 |     1 | True      |
+----+----------+------+------+-----------+-------+-----------+

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+---------+--------------------------------------+
| ID                                   | Name    | Subnets                              |
+--------------------------------------+---------+--------------------------------------+
| 394ec727-7e9a-473e-8068-45aa841a9ac2 | public  | ea6cb6cb-74ed-4007-bd25-b3fb84111e84 |
| 7336a271-bec9-4d33-8dc5-e9f3a9892ed7 | private | a454cf3e-fef5-46f6-8468-4a26cbd14983 |
+--------------------------------------+---------+--------------------------------------+

# データベースインスタンス作成
root@dlp ~(keystone)# openstack database instance create MariaDB-105 \
--flavor 0 \
--size 10 \
--nic net-id=7336a271-bec9-4d33-8dc5-e9f3a9892ed7 \
--databases MyDB --users serverworld:password \
--datastore mariadb --datastore-version 10.5 \
--is-public \
--allowed-cidr 10.0.0.0/24 \
--allowed-cidr 192.168.100.0/24 
+--------------------------+--------------------------------------+
| Field                    | Value                                |
+--------------------------+--------------------------------------+
| allowed_cidrs            | ['10.0.0.0/24', '192.168.100.0/24']  |
| created                  | 2022-10-12T06:16:45                  |
| datastore                | mariadb                              |
| datastore_version        | 10.5                                 |
| datastore_version_number | 10.5                                 |
| encrypted_rpc_messaging  | True                                 |
| flavor                   | 0                                    |
| id                       | 6f5a4b8a-b9b1-4c3c-bcdf-52a0e9993c5d |
| name                     | MariaDB-105                          |
| operating_status         |                                      |
| public                   | True                                 |
| region                   | RegionOne                            |
| server_id                | None                                 |
| service_status_updated   | 2022-10-12T06:16:45                  |
| status                   | BUILD                                |
| tenant_id                | 231a529f51394426b07c56f2c5ec580e     |
| updated                  | 2022-10-12T06:16:45                  |
| volume                   | 10                                   |
| volume_id                | None                                 |
+--------------------------+--------------------------------------+

# 作成中は [BUILD] ステータス

root@dlp ~(keystone)#
openstack database instance list

+--------------------------------------+-------------+-----------+-------------------+--------+------------------+--------+-----------+-----------+------+------+
| ID                                   | Name        | Datastore | Datastore Version | Status | Operating Status | Public | Addresses | Flavor ID | Size | Role |
+--------------------------------------+-------------+-----------+-------------------+--------+------------------+--------+-----------+-----------+------+------+
| 6f5a4b8a-b9b1-4c3c-bcdf-52a0e9993c5d | MariaDB-105 | mariadb   | 10.5              | BUILD  |                  | True   |           | 0         |   10 |      |
+--------------------------------------+-------------+-----------+-------------------+--------+------------------+--------+-----------+-----------+------+------+

# 作成が正常に完了すると [HEALTHY] ステータス

root@dlp ~(keystone)#
openstack database instance list

+--------------------------------------+-------------+-----------+-------------------+--------+------------------+--------
| ID                                   | Name        | Datastore | Datastore Version | Status | Operating Status | Public 
+--------------------------------------+-------------+-----------+-------------------+--------+------------------+--------
| 6f5a4b8a-b9b1-4c3c-bcdf-52a0e9993c5d | MariaDB-105 | mariadb   | 10.5              | ACTIVE | HEALTHY          | True   
+--------------------------------------+-------------+-----------+-------------------+--------+------------------+--------
+-----------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------+------+
| Addresses                                                                                                                                           | Flavor ID | Size | Role |
+-----------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------+------+
| [{'address': '192.168.100.199', 'type': 'private', 'network': '7336a271-bec9-4d33-8dc5-e9f3a9892ed7'}, {'address': '10.0.0.231', 'type': 'public'}] | 0         |   10 |      |
+-----------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------+------+

# アクセスして動作確認

root@dlp ~(keystone)#
mysql -h 10.0.0.231 -u serverworld -p -e "show variables like 'hostname'; show databases;"

Enter password:
+---------------+--------------+
| Variable_name | Value        |
+---------------+--------------+
| hostname      | 8ea041de4188 |
+---------------+--------------+
+--------------------+
| Database           |
+--------------------+
| MyDB               |
| information_schema |
+--------------------+

# データベースインスタンスを削除する場合は以下

root@dlp ~(keystone)#
openstack database instance delete MariaDB-105

Request to delete database instance 6f5a4b8a-b9b1-4c3c-bcdf-52a0e9993c5d has been accepted.
[4] MySQL を起動する場合の設定です。
root@dlp ~(keystone)#
openstack datastore list

+--------------------------------------+------------+
| ID                                   | Name       |
+--------------------------------------+------------+
| 249f318b-e209-44b4-a24a-d320dc38a1d3 | mysql      |
| 2d921feb-319b-4dac-aaa3-4e814ef2b9c6 | mariadb    |
+--------------------------------------+------------+

root@dlp ~(keystone)#
openstack datastore version list mysql

+--------------------------------------+------+---------+
| ID                                   | Name | Version |
+--------------------------------------+------+---------+
| d3ba7a2b-851e-4f58-8a80-4e830ce5b635 | 8.0  | 8.0     |
+--------------------------------------+------+---------+

root@dlp ~(keystone)# openstack database instance create MySQL-8 \
--flavor 0 \
--size 10 \
--nic net-id=7336a271-bec9-4d33-8dc5-e9f3a9892ed7 \
--databases MyDB --users serverworld:password \
--datastore mysql --datastore-version 8.0 \
--is-public \
--allowed-cidr 10.0.0.0/24 \
--allowed-cidr 192.168.100.0/24 

root@dlp ~(keystone)#
openstack database instance list

+--------------------------------------+---------+-----------+-------------------+--------+------------------+--------
| ID                                   | Name    | Datastore | Datastore Version | Status | Operating Status | Public 
+--------------------------------------+---------+-----------+-------------------+--------+------------------+--------
| 41590807-86f5-4d8e-99f6-3a8904fca8c4 | MySQL-8 | mysql     | 8.0               | ACTIVE | HEALTHY          | True   
+--------------------------------------+---------+-----------+-------------------+--------+------------------+--------
+-----------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------+------+
| Addresses                                                                                                                                           | Flavor ID | Size | Role |
+-----------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------+------+
| [{'address': '192.168.100.216', 'type': 'private', 'network': '7336a271-bec9-4d33-8dc5-e9f3a9892ed7'}, {'address': '10.0.0.215', 'type': 'public'}] | 0         |   10 |      |
+-----------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------+------+

root@dlp ~(keystone)#
mysql -h 10.0.0.215 -u serverworld -p -e "show variables like 'hostname'; show databases;"

Enter password:
+---------------+--------------+
| Variable_name | Value        |
+---------------+--------------+
| hostname      | 8d51d5837578 |
+---------------+--------------+
+--------------------+
| Database           |
+--------------------+
| MyDB               |
| information_schema |
| performance_schema |
+--------------------+
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