OpenStack镜像服务glance

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             CentOS7192.168.56.12   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-glance

2、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.confconnection = 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.confconnection = mysql+pymysql://glance:glance@192.168.56.11/glance

3、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://192.168.56.11:5000auth_url = http://192.168.56.11:35357memcached_servers = 192.168.56.11:11211auth_type = passwordproject_domain_name = defaultuser_domain_name = defaultproject_name = serviceusername = glancepassword = 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://192.168.56.11:5000auth_url = http://192.168.56.11:35357memcached_servers = 192.168.56.11:11211auth_type = passwordproject_domain_name = defaultuser_domain_name = defaultproject_name = serviceusername = glancepassword = glance在[paste_deploy]下添加flavor = keystone

5、配置镜像存储位置

编辑glance-api.conf

在[glance_store]下修改stores = file,httpdefault_store = filefilesystem_store_datadir = /var/lib/glance/p_w_picpaths

6、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]# ls29d99654-ba91-4d04-8808-e1b8d16861fb