3、OpenStack Image（镜像）服务
1、概述xxx
2、准备 安装和配置 镜像 服务的 环境
2.1、创建一个数据库，服务凭证和API endpoints
2.1.1、登录mysql数据库
# mysql -u root -p
2.1.2、创建glance 数据库
MariaDB [(none)]> CREATE DATABASE glance;
Query OK, 1 row affected (0.01 sec)
2.1.3、授予glance数据库的正确访问权限
MariaDB [(none)]> grant all privileges on glance .* to 'glance'@'localhost' \
-> identified by 'PASSWORD';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> grant all privileges on glance .* to 'glance'@'%'identified by 'PASSWORD';
Query OK, 0 rows affected (0.00 sec)
2.2、调用admin-openrc凭据
# source admin-openrc
2.3、创建服务凭据
2.3.1、创建glance用户
# openstack user create --domain default --password-prompt glance
User Password:
Repeat User Password:
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | default |
| enabled | True |
| id | 243f718f20684941a8a3a3f41594d91d |
| name | glance |
| password_expires_at | None |
+---------------------+----------------------------------+
2.3.2、将admin角色添加到glance用户和 service项目中
# openstack role add --project service --user glance admin
2.3.4、创建glance service entity
# openstack service create --name glance \
> --description "OpenStack Image" image
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Image |
| enabled | True |
| id | 60fb47009a77459c87af0f176277ba82 |
| name | glance |
| type | image |
+-------------+----------------------------------+
2.3.5、创建镜像服务API endpoint，分别创建public、internal、admin
# openstack endpoint create --region RegionOne \
> image public http://controller:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | b7c7c5525c1a46e98a03b7ba0cd895ea |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 60fb47009a77459c87af0f176277ba82 |
| service_name | glance |
| service_type | image |
| url | http://controller:9292 |
+--------------+----------------------------------+
# openstack endpoint create --region RegionOne \
> image internal http://controller:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 87c42a845cc2443796f61526945f8341 |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 60fb47009a77459c87af0f176277ba82 |
| service_name | glance |
| service_type | image |
| url | http://controller:9292 |
+--------------+----------------------------------+
openstack endpoint create --region RegionOne \
> image admin http://controller:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 26a91288caa84538bea13f6eb1670901 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 60fb47009a77459c87af0f176277ba82 |
| service_name | glance |
| service_type | image |
| url | http://controller:9292 |
+--------------+----------------------------------+
3、安装和配置镜像服务
3.1、安装glance
yum install openstack-glance
3.2、配置glance（/etc/glance/glance-api.conf）
3.2.1、在节点中，配置数据库访问
...
connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance
3.2.2、在和部分，配置身份服务访问
NOTICE:注释掉或删除该部分中的任何其他选项 。
...
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 = GLANCE_PASS
...
flavor = keystone
3.2.3、在节中，配置本地文件系统存储和映像文件的位置
...
stores = file,http
default_store = file
filesystem_store_datadir = /var/lib/glance/images/
3.3、配置glance（/etc/glance/glance-registry.conf）
3.3.1、在节中，配置数据库访问
...
connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance
3.3.2、在和部分，配置身份服务访问
...
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 = GLANCE_PASS
NOTICE:注释掉或删除该部分中的任何其他选项 。
...
flavor = keystone
3.3.3、填充图像服务数据库
# su -s /bin/sh -c "glance-manage db_sync" glance
Option "verbose" from group "DEFAULT" is deprecated for removal.Its value may be silently ignored in the future.
/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py:1171: OsloDBDeprecationWarning: EngineFacade is deprecated; please use oslo_db.sqlalchemy.enginefacade
expire_on_commit=expire_on_commit, _conf=conf)
/usr/lib/python2.7/site-packages/pymysql/cursors.py:166: Warning: (1831, u'Duplicate index `ix_image_properties_image_id_name`. This is deprecated and will be disallowed in a future release.')
result = self._query(query)
NOTICE：忽略此输出中的任何废弃消息。
3.3.4、启动镜像服务并设置为随机自启动
# systemctl enable openstack-glance-api.service \
openstack-glance-registry.service
# systemctl start openstack-glance-api.service \
openstack-glance-registry.service
4、验证操作
使用CirrOS验证图像服务的操作，这 是一个小型的Linux映像，可帮助您测试OpenStack部署。
4.1、调用admin-openrc凭据
# source admin-openrc
4.2、安装wget，下载镜像
# yum install wget
# wget http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img
4.3、使用QCOW2磁盘格式，裸机 容器格式和公共可见性将图像上传到图像服务 ，所以所有项目都可以访问它
# 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 | 2017-07-19T10:54:04Z |
| disk_format | qcow2 |
| file | /v2/images/69c87155-bd76-4ae7-bfce-53ad912b0463/file |
| id | 69c87155-bd76-4ae7-bfce-53ad912b0463 |
| min_disk | 0 |
| min_ram | 0 |
| name | cirros |
| owner | 2ca49bfa14cb4229b8cc868ea0eede81 |
| protected | False |
| schema | /v2/schemas/image |
| size | 13287936 |
| status | active |
| tags | |
| updated_at | 2017-07-19T10:54:06Z |
| virtual_size | None |
| visibility | public |
+------------------+------------------------------------------------------+
4.4、确认镜像上传状态正常（active）
# openstack image list
+--------------------------------------+--------+--------+
| ID | Name | Status |
+--------------------------------------+--------+--------+
| 69c87155-bd76-4ae7-bfce-53ad912b0463 | cirros | active |
+--------------------------------------+--------+--------+
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