OpenStack镜像服务glance
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一、环境准备
1、虚拟机准备
IP地址 主机名 操作系统
192.168.56.11 linux-node1 CentOS7
192.168.56.12 linux-node2 CentOS7其中，linux-node1当作控制节点
linux-node2当作计算节点
二、镜像服务
OpenStack镜像服务是IaaS的核心服务。它接受磁盘镜像或服务器镜像API请求，和来自终端用户或OpenStack计算组件的元数据定义。它也支持包括OpenStack对象存储在内的多种类型仓库上的磁盘镜像或服务器镜像存储。
大量周期性进程运行于OpenStack镜像服务上以支持缓存。同步复制（Replication）服务保证集群中的一致性和可用性。其它周期性进程包括auditors, updaters, 和 reapers。
OpenStack镜像服务包括以下组件：
glance-api
接收镜像API的调用，诸如镜像发现、恢复、存储。
监听9292端口
glance-registry
存储、处理和恢复镜像的元数据，元数据包括项诸如大小和类型
监听9191端口
#glance-registry是私有内部服务，用于服务OpenStack Image服务。不要向用户暴露该服务三、安装和配置
1、安装
[root@linux-node1 ~]# yum install -y openstack-glance2、配置
先决条件
（1）创建glance数据库
（2）获得 admin 凭证来获取只有管理员能执行的命令的访问权限
创建用户
（3）修改glance-api.conf
配置数据库连接
vim /etc/glance/glance-api.conf
connection = mysql+pymysql://glance:glance@192.168.56.11/glance（4）修改glance-registry.conf
配置数据库连接
vim /etc/glance/glance-registry.conf
connection = mysql+pymysql://glance:glance@192.168.56.11/glance3、写入镜像服务数据库
同步数据库，创建glance的表结构
su -s /bin/sh -c "glance-manage db_sync" glance同步完成后，确认一下创建是否成功
[root@linux-node1 ~]# mysql -h 192.168.56.11 -uglance -pglance -e "use glance;show tables;"
+----------------------------------+
| Tables_in_glance |
+----------------------------------+
| artifact_blob_locations |
| artifact_blobs |
| artifact_dependencies |
| artifact_properties |
| artifact_tags |
| artifacts |
| p_w_picpath_locations |
| p_w_picpath_members |
| p_w_picpath_properties |
| p_w_picpath_tags |
| p_w_picpaths |
| metadef_namespace_resource_types |
| metadef_namespaces |
| metadef_objects |
| metadef_properties |
| metadef_resource_types |
| metadef_tags |
| migrate_version |
| task_info |
| tasks |
+----------------------------------+4、配置keystone
修改glance-api.conf
vim /etc/glance/glance-api.conf
#在[keystone_authtoken]下添加
auth_uri = http://192.168.56.11:5000
auth_url = http://192.168.56.11:35357
memcached_servers = 192.168.56.11:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = glance
#在[paste_deploy]下添加
flavor = keystone修改glance-registry.conf
vim /etc/glance/glance-registry.conf
在[keystone_authtoken]下添加
auth_uri = http://192.168.56.11:5000
auth_url = http://192.168.56.11:35357
memcached_servers = 192.168.56.11:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = glance
在[paste_deploy]下添加
flavor = keystone5、配置镜像存储位置
编辑glance-api.conf
在[glance_store]下修改
stores = file,http
default_store = file
filesystem_store_datadir = /var/lib/glance/p_w_picpaths6、启动glance
设置开机启动
[root@linux-node1 ~]# systemctl enable openstack-glance-api.service \
> openstack-glance-registry.service
启动glance
[root@linux-node1 ~]# systemctl start openstack-glance-api.service \
> openstack-glance-registry.service执行netstat -lntp查看端口监听情况，若9292和9191都已监听，则证明glance启动成功。
7、在keystone上做服务注册
在创建之前，要先执行环境变量脚本
[root@linux-node1 ~]# source admin-openstack.sh再创建glance服务实体
[root@linux-node1 ~]# openstack service create --name glance --description "OpenStack Image" p_w_picpath
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Image |
| enabled | True |
| id | 6b6de8cbe36d439bb9a4ef90a7aa6f0e |
| name | glance |
| type | p_w_picpath |
+-------------+----------------------------------+创建镜像服务的API endpoint
[root@linux-node1 ~]# openstack endpoint create --region RegionOne p_w_picpath public http://192.168.56.11:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 560d86e5e9074b4b9a98564298e2e3bf |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 6b6de8cbe36d439bb9a4ef90a7aa6f0e |
| service_name | glance |
| service_type | p_w_picpath |
| url | http://192.168.56.11:9292 |
+--------------+----------------------------------+[root@linux-node1 ~]# openstack endpoint create --region RegionOne p_w_picpath internal http://192.168.56.11:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 9f9bf0ef9e804099b2a11a94d8181e48 |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 6b6de8cbe36d439bb9a4ef90a7aa6f0e |
| service_name | glance |
| service_type | p_w_picpath |
| url | http://192.168.56.11:9292 |
+--------------+----------------------------------+[root@linux-node1 ~]# openstack endpoint create --region RegionOne p_w_picpath admin http://192.168.56.11:9292
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | f7008f53f5664a6f81b90841fee66c93 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 6b6de8cbe36d439bb9a4ef90a7aa6f0e |
| service_name | glance |
| service_type | p_w_picpath |
| url | http://192.168.56.11:9292 |
+--------------+----------------------------------+验证是否创建成功
[root@linux-node1 ~]# openstack p_w_picpath list
[root@linux-node1 ~]# glance p_w_picpath-list
+----+------+
| ID | Name |
+----+------+
+----+------+
[root@linux-node1 ~]#
执行上面两条命令，若返回结果与上面结果一致，则服务注册成功。8、上传镜像
使用QCOW2磁盘格式，bare容器格式上传镜像到镜像服务并设置为public，这样所有的项目都可以访问它
[root@linux-node1 ~]# openstack p_w_picpath 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 | 2016-10-27T16:21:42Z |
| disk_format | qcow2 |
| file | /v2/p_w_picpaths/29d99654-ba91-4d04-8808-e1b8d16861fb/file |
| id | 29d99654-ba91-4d04-8808-e1b8d16861fb |
| min_disk | 0 |
| min_ram | 0 |
| name | cirros |
| owner | 53f72af1420a4d098d48f2c82d7e9ec7 |
| protected | False |
| schema | /v2/schemas/p_w_picpath |
| size | 13287936 |
| status | active |
| tags | |
| updated_at | 2016-10-27T16:21:43Z |
| virtual_size | None |
| visibility | public |
+------------------+------------------------------------------------------+查看镜像是否创建成功
[root@linux-node1 ~]# openstack p_w_picpath list
+--------------------------------------+--------+--------+
| ID | Name | Status |
+--------------------------------------+--------+--------+
| 29d99654-ba91-4d04-8808-e1b8d16861fb | cirros | active |
+--------------------------------------+--------+--------+
[root@linux-node1 ~]# glance p_w_picpath-list
+--------------------------------------+--------+
| ID | Name |
+--------------------------------------+--------+
| 29d99654-ba91-4d04-8808-e1b8d16861fb | cirros |
+--------------------------------------+--------+镜像上传所在的目录
[root@linux-node1 ~]# cd /var/lib/glance/p_w_picpaths/
[root@linux-node1 p_w_picpaths]# ls
29d99654-ba91-4d04-8808-e1b8d16861fb免责声明：
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