簡介
Glance是OpenStack鏡像服務，用來註冊、登陸和檢索虛擬機鏡像。
Glance服務提供了一個REST API，能夠查詢虛擬機鏡像元數據和檢索的實際鏡像。
通過鏡像服務提供的虛擬機鏡像可以存儲在不同的位置，從簡單的文件系統對象存儲到類似OpeenStack對象存儲系統。
本次安裝使用普通文件作爲後端，將上傳的鏡像放在/var/lib/image這個目錄中，用於存儲虛擬機的鏡像和快照（確保這個目錄有足夠的空間）
鏡像服務的組件：
Glance-API 承接鏡像的探索，檢索和存儲鏡像的API調用。
Glance-registry 存儲，處理和檢索有關鏡像的元數據，元數據大小、類型等。
Database 存儲鏡像元數據，你可以選擇你喜歡的數據庫，現在比較多的是mysql和sqlite
Storage repository for image files 鏡像存儲，支持各種存儲類型，包括普通文件系統，RADOS塊設備，HTTP，和亞馬遜的S3，（注意，有些存儲只支持只讀）
配置glance數據庫
mysql -uroot -pPASS -e "CREATE DATABASE glance;"
mysql -uroot -pPASS -e "GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' IDENTIFIED BY 'glance';"
mysql -uroot -pPASS -e "GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' IDENTIFIED BY 'glance';"創建user、service，endpoint
- source 變量
source admin-openrc.sh- 創建 glance user
openstack user create --password-prompt glance
User Password:
Repeat User Password:
+----------+----------------------------------+
| Field | Value |
+----------+----------------------------------+
| email | None |
| enabled | True |
| id | d9363e392a764cc0968405b3ba19fe8b |
| name | glance |
| username | glance |
+----------+----------------------------------+- 給予glance user admin 角色
openstack role add --project service --user glance admin
+-------+----------------------------------+
| Field | Value |
+-------+----------------------------------+
| id | 53e5d390efe84b948ba5718f116b4861 |
| name | admin |
+-------+----------------------------------+- 創建glance service
openstack service create --name glance --description "OpenStack Image service" image
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Image service |
| enabled | True |
| id | e4417d6d57654f96bf8cff0a3327a97c |
| name | glance |
| type | image |
+-------------+----------------------------------+- 創建 glance api endpoint
openstack endpoint create \
--publicurl http://controller:9292 \
--internalurl http://controller:9292 \
--adminurl http://controller:9292 \
--region RegionOne \
image
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| adminurl | http://controller:9292 |
| id | f0b4177e0daa4dac939f91e3b9f09e26 |
| internalurl | http://controller:9292 |
| publicurl | http://controller:9292 |
| region | RegionOne |
| service_id | e4417d6d57654f96bf8cff0a3327a97c |
| service_name | glance |
| service_type | image |
+--------------+----------------------------------+安裝glance軟件包
yum -y install openstack-glance python-glance python-glanceclient配置glance
- glance-api.conf
openstack-config --set /etc/glance/glance-api.conf database connection mysql://glance:glance@controller/glance
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_uri http://controller:5000
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_url http://controller:35357
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_plugin password
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken project_domain_id default
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken user_domain_id default
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken project_name service
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken username glance
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken password glance
openstack-config --set /etc/glance/glance-api.conf paste_deploy flavor keystone
openstack-config --set /etc/glance/glance-api.conf glance_store default_store file
openstack-config --set /etc/glance/glance-api.conf glance_store filesystem_store_datadir /var/lib/glance/images/
openstack-config --set /etc/glance/glance-api.conf DEFAULT notification_driver noop
openstack-config --set /etc/glance/glance-api.conf DEFAULT verbose True- glance-registry.conf
openstack-config --set /etc/glance/glance-registry.conf database connection mysql://glance:glance@controller/glance
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_uri http://controller:5000
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_url http://controller:35357
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_plugin password
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken project_domain_id default
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken user_domain_id default
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken project_name service
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken username glance
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken password glance
openstack-config --set /etc/glance/glance-registry.conf paste_deploy flavor keystone
openstack-config --set /etc/glance/glance-registry.conf glance_store default_store file
openstack-config --set /etc/glance/glance-registry.conf glance_store filesystem_store_datadir /var/lib/glance/images/
openstack-config --set /etc/glance/glance-api.conf DEFAULT notification_driver noop
openstack-config --set /etc/glance/glance-api.conf DEFAULT verbose True初始化 glance數據庫
su -s /bin/sh -c "glance-manage db_sync" glance啓動glance並設置開啓啓動
systemctl enable openstack-glance-api.service openstack-glance-registry.service
systemctl restart openstack-glance-api.service openstack-glance-registry.service驗證服務
- 設置環境變量（glance api選用2.0）
echo "export OS_IMAGE_API_VERSION=2" | tee -a admin-openrc.sh demo-openrc.sh
source admin-openrc.sh- 創建本地目錄並下載測試鏡像
mkdir /tmp/images
wget -P /tmp/images http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img- 上傳鏡像並查看
glance image-create --name "cirros-0.3.4-x86_64" --file /tmp/images/cirros-0.3.4-x86_64-disk.img \
> --disk-format qcow2 --container-format bare --visibility public --progress
[=============================>] 100%
+------------------+--------------------------------------+
| Property | Value |
+------------------+--------------------------------------+
| checksum | ee1eca47dc88f4879d8a229cc70a07c6 |
| container_format | bare |
| created_at | 2015-09-10T04:26:06Z |
| disk_format | qcow2 |
| id | 476d7b76-57d8-48be-a7e0-2130e718f157 |
| min_disk | 0 |
| min_ram | 0 |
| name | cirros-0.3.4-x86_64 |
| owner | 6655a8db1705461384c78137e5e87c17 |
| protected | False |
| size | 13287936 |
| status | active |
| tags | [] |
| updated_at | 2015-09-10T04:26:07Z |
| virtual_size | None |
| visibility | public |
+------------------+--------------------------------------+
glance image-list
+--------------------------------------+---------------------+
| ID | Name |
+--------------------------------------+---------------------+
| 476d7b76-57d8-48be-a7e0-2130e718f157 | cirros-0.3.4-x86_64 |
+--------------------------------------+---------------------+
ls /var/lib/glance/images/
476d7b76-57d8-48be-a7e0-2130e718f157glance服務小結
| 項目 | 說明 |
|---|---|
| 服務名稱 | glance |
| 啓動命令 | systemctl restart openstack-glance-api.service openstack-glance-registry.service |
| image存放目錄 | /var/lib/glance/images/ |
| api配置文件 | /etc/glance/glance-api.conf |
| registry配置文件 | /etc/glance/glance-registry.conf |
| api 日誌 | /var/log/glance/api.log |
| registry日誌 | /var/log/glance/registry.log |