简介
Glance是Openstack的镜像服务。可以让用户注册、查找和检索在Openstack环境中使用的虚拟镜像。Openstack镜像服务支持将镜像文件存储在各种类型的存储环境中。例如本地文件系统或分布式文件系统，如Openstack的对象存储服务（Swift）。下边我们开始部署Glance组件。
创建数据库
与keystone部署一样，需要先创建名为glance的数据库
$ 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';
组件部署
Glance分为两个子服务，如下所示
- Glance-api：接受云系统镜像的创建、删除、读取服务
- Glance-Registry：云系统的镜像注册服务
安装
# yum install openstack-glance
配置
编辑/etc/glance/glance-api.conf文件
[database] # ... connection = mysql+pymysql://glance:glance@192.168.46.130/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/ #设置镜像本地存储
编辑 /etc/glance/glance-registry.conf ，需要修改的配置与/etc/glance/glance-api.conf类似
[database] # ... connection = mysql+pymysql://glance:glance@192.168.46.130/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数据库
# su -s /bin/sh -c "glance-manage db_sync" glance
启动服务
# systemctl enable openstack-glance-api.service openstack-glance-registry.service # systemctl start openstack-glance-api.service openstack-glance-registry.service
在keystone注册Glance
经过以上操作可以说Glance已经基本部署完成了，但是这样的话，其他组件是无法使用Glance的，接下来还需要在keystone中做注册，因为openstack的其他组件访问Glance时，都是先到keystone上做认证，获得访问Glance的权限，也就是得到一个token，然后才能访问Glance。
- 先把环境变量设置上去，使用之前保存的脚本
source admin-openstack.sh
- 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 | 3f4e777c4062483ab8d9edd7dff829df |
| name | glance |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+
- 添加角色和项目
$ openstack role add --project service --user glance admin
- 注册服务
$ openstack service create --name glance --description "OpenStack Image" image #不能乱改 +-------------+----------------------------------+ | Field | Value | +-------------+----------------------------------+ | description | OpenStack Image | | enabled | True | | id | 8c2c7f1b9b5049ea9e63757b5533e6d2 | | name | glance | | type | image | +-------------+----------------------------------+
- 注册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 | +--------------+----------------------------------+
以上三个endpoint是可以设置三个不同的IP的，public为公网，internal为内网，admin为管理。可以设置三个不同的url分别部署在不同的主机上。本次我们只使用了一个主机部署，所以设置的都一样。
验证Glance安装
至此Glance我们就完成部署了，下边执行命令验证Glance是否正常
[root@localhost ~]# openstack image list [root@localhost ~]#
如果以上命令正常执行，则说明Glance部署成功
加载镜像
- 设置环境变量
source admin-openstack.sh
- 下载镜像
$ wget http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img
- 加载镜像
$ 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 | +------------------+------------------------------------------------------+
- 查看镜像
$ openstack image list +--------------------------------------+--------+--------+ | ID | Name | Status | +--------------------------------------+--------+--------+ | 38047887-61a7-41ea-9b49-27987d5e8bb9 | cirros | active | +--------------------------------------+--------+--------+
其他
如果在部署过程中服务报错，可以在/var/log/glance/目录下查看glance的日志，如下：
可以在日志中查看ERROR的信息。当然在/var/log/keystone/下同样可以看到keystone的日志。