Glance的概述 Glance是为虚拟机的创建提供镜像的服务，我们基于Openstack是构建基本的IaaS平台对外提供虚拟机，而虚拟机在创建时必须为选择需要安装的操作系统，Glance服务就是为该选择提供不同的操作系统镜像。
Glance的组件 Glance-API 主要用来响应各种REST请求然后通过其它模块（主要是glance-registry组件和后端存储接口）完成镜像的上传、删除、查询等操作。可以简单的再分为两部分：一层中间件，它主要是做一些对请求的解析工作（如分析出版本号）， 另外一部分提供实际的服务（如与镜像上传下载的后端存储接口交互）。默认绑定端口是9292。
Glance-Registry 镜像注册服务用于提供镜像元数据的REST接口。主要工作是存储或者获取镜像的元数据，与MySQL数据库进行交互。也可以简单的再细分为两部分，API和具体的Server。元数据是指镜像相关的一些信息（如id，size， status，location，checksum，min_disk，min_ram，owner等）真正的镜像数据保存在实际所使用的后端存储里（如Swift，S3，Filesystem等）。默认绑定的端口是9191。
Image Store 严格来说Image Store不属于Glance的组件，这里把它单独分出来只是为了方便理解，它只是一个接口层，提供镜像存储和查询的接口。具体的实现则需要外部存储（Swift，S3）的支持。
部署glance 创建数据库
代码语言：javascript复制[root@controller01 ~]# mysql -u root -p123456
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 47
Server version: 10.2.29-MariaDB-log MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MariaDB [(none)]> CREATE DATABASE glance;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> exit;
Bye创建glance-api 创建service项目
代码语言：javascript复制#创建service项目
#创建1个project，glance/nova/neutron等服务加入到此project；
# service项目在”Default” domain中
[root@controller01 ~]# openstack project create --domain Default --description "Service Project" service
------------- ----------------------------------
| Field | Value |
------------- ----------------------------------
| description | Service Project |
| domain_id | default |
| enabled | True |
| id | 327a7a4e418140108a8b4fed767e9ffe |
| is_domain | False |
| name | service |
| parent_id | default |
| tags | [] |
------------- ---------------------------------- 创建glance用户
代码语言：javascript复制[root@controller01 ~]# openstack user create --domain Default --password-prompt glance
User Password:
Repeat User Password:
--------------------- ----------------------------------
| Field | Value |
--------------------- ----------------------------------
| domain_id | default |
| enabled | True |
| id | 2d1a3f9658474db795a7f8834a83a16f |
| name | glance |
| options | {} |
| password_expires_at | None |
--------------------- ----------------------------------
# 为glance用户赋予admin权限
[root@controller01 ~]# openstack role add --project service --user glance admin
# 服务实体类型”image”
[root@controller01 ~]# openstack service create --name glance --description "OpenStack Image" image
------------- ----------------------------------
| Field | Value |
------------- ----------------------------------
| description | OpenStack Image |
| enabled | True |
| id | c28d6edb3ea04e11add10d410bfca9b9 |
| name | glance |
| type | image |
------------- ----------------------------------
# 注意--region与初始化admin用户时生成的region一致；
# api地址统一采用vip，如果public/internal/admin分别使用不同的vip，请注意区分；如果没vip，写单个控制节点的
# 服务类型为image；
# public api
[root@controller01 ~]# openstack endpoint create --region RegionOne image public http://controller01:9292
-------------- ----------------------------------
| Field | Value |
-------------- ----------------------------------
| enabled | True |
| id | f07aab17f01c4d3b8c82e229835fee7f |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | c28d6edb3ea04e11add10d410bfca9b9 |
| service_name | glance |
| service_type | image |
| url | http://controller01:9292 |
-------------- ----------------------------------
# internal api
[root@controller01 ~]# openstack endpoint create --region RegionOne image internal http://controller01:9292
-------------- ----------------------------------
| Field | Value |
-------------- ----------------------------------
| enabled | True |
| id | 45fd0b57fda148bcbb112a7be056e73a |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | c28d6edb3ea04e11add10d410bfca9b9 |
| service_name | glance |
| service_type | image |
| url | http://controller01:9292 |
-------------- ----------------------------------
# admin api
[root@controller01 ~]# openstack endpoint create --region RegionOne image admin http://controller01:9292
-------------- ----------------------------------
| Field | Value |
-------------- ----------------------------------
| enabled | True |
| id | 0278bf6855614b159ed7d7eeaecd0639 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | c28d6edb3ea04e11add10d410bfca9b9 |
| service_name | glance |
| service_type | image |
| url | http://controller01:9292 |
-------------- ---------------------------------- 安装glance
代码语言：javascript复制# 在全部控制节点安装glance，以controller01节点为例
[root@controller01 ~]# yum install openstack-glance python-glance python-glanceclient -y配置glance-api.conf
代码语言：javascript复制# 在全部控制节点操作，以controller01节点为例；
# 注意”bind_host”参数，根据节点修改；
# 注意glance-api.conf文件的权限：root:glance
[root@controller01 ~]# cp /etc/glance/glance-api.conf /etc/glance/glance-api.conf.bak
[root@controller01 ~]# egrep -v "^$|^#" /etc/glance/glance-api.conf
[DEFAULT]
ble_v1_api = false
bind_host = 192.168.182.131
[cors]
[database]
connection = mysql pymysql://glance:123456@controller01/glance
[glance_store]
stores = file,http
default_store = file
filesystem_store_datadir = /var/lib/glance/images/
[image_format]
[keystone_authtoken]
auth_url = http://controller01:5000
memcached_servers = controller01:11211,controller02:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = 123456
[matchmaker_redis]
[oslo_concurrency]
[oslo_messaging_amqp]
[oslo_messaging_kafka]
[oslo_messaging_notifications]
[oslo_messaging_rabbit]
[oslo_messaging_zmq]
[oslo_middleware]
[oslo_policy]
[paste_deploy]
flavor = keystone
[profiler]
[store_type_location_strategy]
[task]
[taskflow_executor]
# 创建镜像存储目录并赋权限；
# /var/lib/glance/images是默认的存储目录
[root@controller01 ~]# mkdir -p /var/lib/glance/images
[root@controller01 ~]# chown glance:nobody /var/lib/glance/images
#注意
Queens版本中已弃用Glance Registry Service及其API，并且将遵循OpenStack标准弃用策略在“ S”开发周期开始时将其删除。
有关更多信息，请参见Glance规范文档实际上不推荐使用Glance注册表。同步glance数据库
代码语言：javascript复制# 任意控制节点操作；
# 忽略输出的“deprecated”信息
[root@controller01 ~]# su -s /bin/sh -c "glance-manage db_sync" glance
[root@controller01 glance]# su -s /bin/sh -c "glance-manage db_sync" glance
/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py:1352: OsloDBDeprecationWarning: EngineFacade is deprecated; please use oslo_db.sqlalchemy.enginefacade
expire_on_commit=expire_on_commit, _conf=conf)
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
INFO [alembic.runtime.migration] Running upgrade -> liberty, liberty initial
INFO [alembic.runtime.migration] Running upgrade liberty -> mitaka01, add index on created_at and updated_at columns of 'images' table
INFO [alembic.runtime.migration] Running upgrade mitaka01 -> mitaka02, update metadef os_nova_server
INFO [alembic.runtime.migration] Running upgrade mitaka02 -> ocata_expand01, add visibility to images
INFO [alembic.runtime.migration] Running upgrade ocata_expand01 -> pike_expand01, empty expand for symmetry with pike_contract01
INFO [alembic.runtime.migration] Running upgrade pike_expand01 -> queens_expand01
INFO [alembic.runtime.migration] Running upgrade queens_expand01 -> rocky_expand01, add os_hidden column to images table
INFO [alembic.runtime.migration] Running upgrade rocky_expand01 -> rocky_expand02, add os_hash_algo and os_hash_value columns to images table
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
Upgraded database to: rocky_expand02, current revision(s): rocky_expand02
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
Database migration is up to date. No migration needed.
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
INFO [alembic.runtime.migration] Running upgrade mitaka02 -> ocata_contract01, remove is_public from images
INFO [alembic.runtime.migration] Running upgrade ocata_contract01 -> pike_contract01, drop glare artifacts tables
INFO [alembic.runtime.migration] Running upgrade pike_contract01 -> queens_contract01
INFO [alembic.runtime.migration] Running upgrade queens_contract01 -> rocky_contract01
INFO [alembic.runtime.migration] Running upgrade rocky_contract01 -> rocky_contract02
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
Upgraded database to: rocky_contract02, current revision(s): rocky_contract02
INFO [alembic.runtime.migration] Context impl MySQLImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
Database is synced successfully.
# 查看验证
[root@controller01 ~]# mysql -h controller01 -uglance -p123456 -e "use glance;show tables;"
----------------------------------
| Tables_in_glance |
----------------------------------
| alembic_version |
| image_locations |
| image_members |
| image_properties |
| image_tags |
| images |
| metadef_namespace_resource_types |
| metadef_namespaces |
| metadef_objects |
| metadef_properties |
| metadef_resource_types |
| metadef_tags |
| migrate_version |
| task_info |
| tasks |
---------------------------------- 启动服务
代码语言：javascript复制# 在全部控制节点操作，以controller01节点为例；
# systemctl enable openstack-glance-api.service
# systemctl start openstack-glance-api.service
