手動安裝Openstack Mikita的第三部分: 鏡像服務Glance安裝. 這部分內容主要是對OpenStack Installation Guide for Red Hat Enterprise Linux and CentOS在Glance這部分內容的實踐總結.
The Image service (glance) enables users to discover, register, and retrieve virtual machine images. It offers a REST API that enables you to query virtual machine image metadata and retrieve an actual image. You can store virtual machine images made available through the Image service in a variety of locations, from simple file systems to object-storage systems like OpenStack Object Storage.
爲了簡化操作, 我們將Glance服務安裝在controller節點. 默認的鏡像目錄爲 /var/lib/glance/images/ . 以下操作均在controller節點進行.
一. 安裝前準備
1. 爲Glance創建數據庫
[root@controller ~]# mysql -u root -p
CREATE DATABASE glance;
GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' \
IDENTIFIED BY 'GLANCE_DBPASS';
GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' \
IDENTIFIED BY 'GLANCE_DBPASS';
其中, GLANCE_DBPASS是Glance訪問數據庫時使用的密碼.
2. 創建Service和API Endpoint
(1) 獲取admin-only CLI指令的權限
[root@controller ~]# . admin-openrc
(2) 創建glance用戶
[root@controller ~]# openstack user create --domain default --password-prompt glance
User Password:
Repeat User Password:
+-----------+----------------------------------+
| Field | Value |
+-----------+----------------------------------+
| domain_id | 23445595d52c44be995b0b393870b5ef |
| enabled | True |
| id | dee5c1d866804d2a83d6f5f62c329dc4 |
| name | glance |
+-----------+----------------------------------+
這裏glance用戶的密碼爲: zzr.
(3) 把glance用戶增加到admin角色和service租戶
[root@controller ~]# openstack role add --project service --user glance admin
(4) 創建image服務
[root@controller ~]# openstack service create --name glance \
--description "OpenStack Image" image
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Image |
| enabled | True |
| id | 9df122e5374742cb9bfd1bec48622f30 |
| name | glance |
| type | image |
+-------------+----------------------------------+
(5) 創建image服務的Endpoints
- public endpoint
[root@controller ~]# openstack endpoint create --region RegionOne \
image public http://controller:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 7ddc527f399f4592943c0ac687e313ed |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 9df122e5374742cb9bfd1bec48622f30 |
| service_name | glance |
| service_type | image |
| url | http://controller:9292 |
+--------------+----------------------------------+
- internal endpoint
[root@controller ~]# openstack endpoint create --region RegionOne \
image internal http://controller:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 70f89821d1054a64ba044ac35554a082 |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 9df122e5374742cb9bfd1bec48622f30 |
| service_name | glance |
| service_type | image |
| url | http://controller:9292 |
+--------------+----------------------------------+
- admin endpoint
[root@controller ~]# openstack endpoint create --region RegionOne \
image admin http://controller:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 98f67ed0b6ab454a915d5c585b66b22d |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 9df122e5374742cb9bfd1bec48622f30 |
| service_name | glance |
| service_type | image |
| url | http://controller:9292 |
+--------------+----------------------------------+
二. 安裝glance組件
1. 安裝glance
[root@controller ~]# yum install openstack-glance -y
2. 配置glance
編輯文件 /etc/glance/glance-api.conf :
[database]
...
connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance
[keystone_authtoken]
...
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = zzr
[paste_deploy]
...
flavor = keystone
[glance_store]
...
stores = file,http
default_store = file
filesystem_store_datadir = /var/lib/glance/images/
其中, zzr爲上一步驟中爲glance用戶設置的密碼.
編輯文件 /etc/glance/glance-registry.conf .
[database]
...
connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance
[keystone_authtoken]
...
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = zzr
[paste_deploy]
...
flavor = keystone
[keystone_authtoken]的內容, 除了以上增加的內容外, 其它的全部刪除.
(3) 同步glance配置成數據庫
以glance用戶的身份執行指令 glance-manage db_sync , 同步glance的配置到數據庫:
[root@controller ~]# su -s /bin/sh -c "glance-manage db_sync" glance
(4) 開啓Image服務
[root@controller ~]# # systemctl enable openstack-glance-api.service \
openstack-glance-registry.service
[root@controller ~]# # systemctl start openstack-glance-api.service \
openstack-glance-registry.service
3. 驗證
(1) 獲取admin-only CLI指令的權限
[root@controller ~]# . admin-openrc
(2) 獲取鏡像
[root@controller ~]# wget http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img
(3) 上傳鏡像到Image service
使用QCOW2硬盤格式. public可視, 從而所有project可以看到它.
[root@controller ~]# openstack image create "cirros" \
--file cirros-0.3.4-x86_64-disk.img \
--disk-format qcow2 --container-format bare \
--public
+------------------+------------------------------------------------------+
| Field | Value |
+------------------+------------------------------------------------------+
| checksum | ee1eca47dc88f4879d8a229cc70a07c6 |
| container_format | bare |
| created_at | 2016-08-01T11:26:58Z |
| disk_format | qcow2 |
| file | /v2/images/57d1498f-cbd2-4314-9114-6f74c11d5952/file |
| id | 57d1498f-cbd2-4314-9114-6f74c11d5952 |
| min_disk | 0 |
| min_ram | 0 |
| name | cirros |
| owner | f8207344afbc4983837fccd7ad29c3d7 |
| protected | False |
| schema | /v2/schemas/image |
| size | 13287936 |
| status | active |
| tags | |
| updated_at | 2016-08-01T11:26:59Z |
| virtual_size | None |
| visibility | public |
+------------------+------------------------------------------------------+
(4) 查看現有鏡像
[root@controller ~]# openstack image list
+--------------------------------------+--------+--------+
| ID | Name | Status |
+--------------------------------------+--------+--------+
| 38047887-61a7-41ea-9b49-27987d5e8bb9 | cirros | active |
+--------------------------------------+--------+--------+