openstack安装-glance

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glance提供镜像服务使用户能够发现，注册和检索虚拟机镜像。它提供了一个 REST API，可让您查询虚拟机镜像元数据并检索实际镜像。您可以存储镜像在各种位置（从简单的文件系统到像OpenStack Object Storage这样的对象存储系统）。
为了简单起见，这里只是教你如何配置镜像服务，并把镜像保存到controller节点的文件目录里面，此目录为/var/lib/glance/images/。
这一章还是在controller节点操作。。。

准备

创建数据库

  • 用root用户权限执行mysql

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    $ mysql

  • 创建glance数据库

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    MariaDB [(none)]> CREATE DATABASE glance;

  • 赋予适合的权限给glance数据库

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    MariaDB [(none)]> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' \
      IDENTIFIED BY 'GLANCE_DBPASS';
    MariaDB [(none)]> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' \
      IDENTIFIED BY 'GLANCE_DBPASS';

替换一下GLANCE_DBPASS为一个合适的密码，后面会用到

  • 退出mysql

    执行以下命令，进入admin身份

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    $ . admin-openrc

创建服务

  • 创建glance用户
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    $ 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                             |
    +---------------------+----------------------------------+

这里会提示输入密码，记住这个密码，下面会用到。

  • 加admin角色到glance用户和service项目

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    $ openstack role add --project service --user glance admin

  • 创建glance服务实体

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    $ openstack service create --name glance \
      --description "OpenStack Image" image

    +-------------+----------------------------------+
    | Field       | Value                            |
    +-------------+----------------------------------+
    | description | OpenStack Image                  |
    | enabled     | True                             |
    | id          | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
    | name        | glance                           |
    | type        | image                            |
    +-------------+----------------------------------+

创建镜像服务API endpoints

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$ openstack endpoint create --region RegionOne \
  image public http://controller:9292

+--------------+----------------------------------+
| Field        | Value                            |
+--------------+----------------------------------+
| enabled      | True                             |
| id           | 340be3625e9b4239a6415d034e98aace |
| interface    | public                           |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
| 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           | a6e4b153c2ae4c919eccfdbb7dceb5d2 |
| interface    | internal                         |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
| 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           | 0c37ed58103f4300a84ff125a539032d |
| interface    | admin                            |
| region       | RegionOne                        |
| region_id    | RegionOne                        |
| service_id   | 8c2c7f1b9b5049ea9e63757b5533e6d2 |
| service_name | glance                           |
| service_type | image                            |
| url          | http://controller:9292           |
+--------------+----------------------------------+

安装和配置组件

安装包

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$ apt install glance

修改/etc/glance/glance-api.conf

  • 在[database]区域，添加数据访问配置
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    [database]
    # ...
    connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance

替换GLANCE_DBPASS为前一节创建数据库的那个密码

  • 在[keystone_authtoken]和[paste_deploy]区域，配置keystone
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    [keystone_authtoken]
    # ...
    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

    [paste_deploy]
    # ...
    flavor = keystone

替换GLANCE_PASS为之前你创建glance用户时的密码。

  • 在[glance_store]区域，配置镜像存储路径。
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    [glance_store]
    # ...
    stores = file,http
    default_store = file
    filesystem_store_datadir = /var/lib/glance/images/

修改/etc/glance/glance-registry.conf

  • 在[database]区域，添加数据访问配置
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    [database]
    # ...
    connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance

替换GLANCE_DBPASS为前一节创建数据库的那个密码

  • 在[keystone_authtoken]和[paste_deploy]区域，配置keystone
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    [keystone_authtoken]
    # ...
    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

    [paste_deploy]
    # ...
    flavor = keystone

替换GLANCE_PASS为之前你创建glance用户时的密码。

初始化镜像服务数据库：

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$ su -s /bin/sh -c "glance-manage db_sync" glance

重启服务

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$ service glance-registry restart
$ service glance-api restart

验证

进入admin身份

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$ . admin-openrc

下载测试镜像

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$ wget http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img

上传测试镜像到镜像服务

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$ 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                                               |
+------------------+------------------------------------------------------+

确认是否上传成功

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$ openstack image list

+--------------------------------------+--------+--------+
| ID                                   | Name   | Status |
+--------------------------------------+--------+--------+
| 38047887-61a7-41ea-9b49-27987d5e8bb9 | cirros | active |
+--------------------------------------+--------+--------+