簡介
Glance是Openstack的鏡像服務。可以讓用戶註冊、查找和檢索在Openstack環境中使用的虛擬鏡像。Openstack鏡像服務支持將鏡像文件存儲在各種類型的存儲環境中。例如本地文件系統或分佈式文件系統，如Openstack的對象存儲服務（Swift）。下邊我們開始部署Glance組件。
創建數據庫
與keystone部署一樣，需要先創建名爲glance的數據庫
$ mysql -u root -p MariaDB [(none)]> CREATE DATABASE glance; MariaDB [(none)]> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' IDENTIFIED BY 'glance'; MariaDB [(none)]> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' IDENTIFIED BY 'glance';
組件部署
Glance分爲兩個子服務，如下所示
- Glance-api：接受雲系統鏡像的創建、刪除、讀取服務
- Glance-Registry：雲系統的鏡像註冊服務
安裝
# yum install openstack-glance
配置
編輯/etc/glance/glance-api.conf文件
[database] # ... connection = mysql+pymysql://glance:[email protected]/glance #... [keystone_authtoken] auth_uri = http://192.168.46.130:5000 auth_url = http://192.168.46.130:35357 memcached_servers = 192.168.46.130:11211 #memcached的端口 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = glance password = glance #... [paste_deploy] # ... flavor = keystone #... [glance_store] # ... stores = file,http default_store = file filesystem_store_datadir = /var/lib/glance/images/ #設置鏡像本地存儲
編輯 /etc/glance/glance-registry.conf ，需要修改的配置與/etc/glance/glance-api.conf類似
[database] # ... connection = mysql+pymysql://glance:[email protected]/glance #... [keystone_authtoken] auth_uri = http://192.168.46.130:5000 auth_url = http://192.168.46.130:35357 memcached_servers = 192.168.46.130:11211 #memcached的端口 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = glance password = glance #... [paste_deploy] # ... flavor = keystone
初始化glance數據庫
# su -s /bin/sh -c "glance-manage db_sync" glance
啓動服務
# systemctl enable openstack-glance-api.service openstack-glance-registry.service # systemctl start openstack-glance-api.service openstack-glance-registry.service
在keystone註冊Glance
經過以上操作可以說Glance已經基本部署完成了，但是這樣的話，其他組件是無法使用Glance的，接下來還需要在keystone中做註冊，因爲openstack的其他組件訪問Glance時，都是先到keystone上做認證，獲得訪問Glance的權限，也就是得到一個token，然後才能訪問Glance。
- 先把環境變量設置上去，使用之前保存的腳本
source admin-openstack.sh
- 創建glance用戶
$ openstack user create --domain default --password-prompt glance
User Password:
Repeat User Password:
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | default |
| enabled | True |
| id | 3f4e777c4062483ab8d9edd7dff829df |
| name | glance |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+
- 添加角色和項目
$ openstack role add --project service --user glance admin
- 註冊服務
$ openstack service create --name glance --description "OpenStack Image" image #不能亂改 +-------------+----------------------------------+ | Field | Value | +-------------+----------------------------------+ | description | OpenStack Image | | enabled | True | | id | 8c2c7f1b9b5049ea9e63757b5533e6d2 | | name | glance | | type | image | +-------------+----------------------------------+
- 註冊endpoint
[root@localhost ~]# openstack endpoint create --region RegionOne image public http://192.168.46.130:9292 +--------------+----------------------------------+ | Field | Value | +--------------+----------------------------------+ | enabled | True | | id | 3bf50e2feba3467c8ee661615f015376 | | interface | public | | region | RegionOne | | region_id | RegionOne | | service_id | d408f9afadf24865b0213971a0a93efe | | service_name | glance | | service_type | image | | url | http://192.168.46.130:9292 | +--------------+----------------------------------+ [root@localhost ~]# openstack endpoint create --region RegionOne image internal http://192.168.46.130:9292 +--------------+----------------------------------+ | Field | Value | +--------------+----------------------------------+ | enabled | True | | id | 6c36fa5d0f8841e899e022fea24e725f | | interface | internal | | region | RegionOne | | region_id | RegionOne | | service_id | d408f9afadf24865b0213971a0a93efe | | service_name | glance | | service_type | image | | url | http://192.168.46.130:9292 | +--------------+----------------------------------+ [root@localhost ~]# openstack endpoint create --region RegionOne image admin http://192.168.46.130:9292 +--------------+----------------------------------+ | Field | Value | +--------------+----------------------------------+ | enabled | True | | id | 6b6d54d2f0034a01b25ccd14f82425ca | | interface | admin | | region | RegionOne | | region_id | RegionOne | | service_id | d408f9afadf24865b0213971a0a93efe | | service_name | glance | | service_type | image | | url | http://192.168.46.130:9292 | +--------------+----------------------------------+
以上三個endpoint是可以設置三個不同的IP的，public爲公網，internal爲內網，admin爲管理。可以設置三個不同的url分別部署在不同的主機上。本次我們只使用了一個主機部署，所以設置的都一樣。
驗證Glance安裝
至此Glance我們就完成部署了，下邊執行命令驗證Glance是否正常
[root@localhost ~]# openstack image list [root@localhost ~]#
如果以上命令正常執行，則說明Glance部署成功
加載鏡像
- 設置環境變量
source admin-openstack.sh
- 下載鏡像
$ wget http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img
- 加載鏡像
$ openstack image create "cirros" \ --file cirros-0.3.5-x86_64-disk.img \ --disk-format qcow2 --container-format bare \ --public +------------------+------------------------------------------------------+ | Field | Value | +------------------+------------------------------------------------------+ | checksum | 133eae9fb1c98f45894a4e60d8736619 | | container_format | bare | | created_at | 2015-03-26T16:52:10Z | | disk_format | qcow2 | | file | /v2/images/cc5c6982-4910-471e-b864-1098015901b5/file | | id | cc5c6982-4910-471e-b864-1098015901b5 | | min_disk | 0 | | min_ram | 0 | | name | cirros | | owner | ae7a98326b9c455588edd2656d723b9d | | protected | False | | schema | /v2/schemas/image | | size | 13200896 | | status | active | | tags | | | updated_at | 2015-03-26T16:52:10Z | | virtual_size | None | | visibility | public | +------------------+------------------------------------------------------+
- 查看鏡像
$ openstack image list +--------------------------------------+--------+--------+ | ID | Name | Status | +--------------------------------------+--------+--------+ | 38047887-61a7-41ea-9b49-27987d5e8bb9 | cirros | active | +--------------------------------------+--------+--------+
其他
如果在部署過程中服務報錯，可以在/var/log/glance/目錄下查看glance的日誌，如下：
可以在日誌中查看ERROR的信息。當然在/var/log/keystone/下同樣可以看到keystone的日誌。