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云计算管理平台之OpenStack块存储服务cinder

  一、cinder简介

  cinder是openstack环境中的块存储服务,主要为运行在openstack之上的虚拟机提供块存储服务的;所谓块存储就是我们经常用的硬盘呀,U盘啊,SD卡等等这些块设备的,这里不同我们生活中看到的那样的磁盘,这里我们可以理解为类似云盘的东西;对于cinder来讲,它主要由三个组件组成,cinder-api、cinder-scheduler、cinder-volume;其中cinder-api和cinder-scheduler这两个组件通常部署在在控制节点,cinder-volume通常部署在storage节点;cinder-volume主要作用是通过接收openstack控制节点上cinder-scheduler发送过来的请求,进行卷管理;cinder-api主要作用是接收请求,并将请求负责丢到对应的队列中去;cinder-scheduler主要负责调度后面的cinder-volume来完成管理卷;

  cinder架构

云计算管理平台之OpenStack块存储服务cinder

  cinder工作过程:首先客户端会把请求发送给cinder-api,cinder-api接收请求,并将其放到对应的消息队列中;然后cinder-scheduler从对应的消息队列取出用户的请求进行调度,把最终的调度结果放到对应的消息队列中去,同时也往数据库中保存一份;在cinder-scheduler把调度结果放到消息队列中去以后,对应的cinder-volume会从对应的消息队列取出消息在本地执行,最后把执行的状态信息写一份到数据库,同时把执行的状态放到消息队列,从而让cinder-api把对应的结果返回给客户端;大致工作流程就是这样;

   二、cinder服务安装配置

  1、在控制节点安装配置cinder-api、cinder-scheduler

  创建cinder数据库以及相关访问数据库的用户和授权

[root@node02 ~]# mysql Welcome to the MariaDB monitor.  Commands end with ; or g. Your MariaDB connection id is 318 Server version: 10.1.20-MariaDB MariaDB Server  Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.  Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.  MariaDB [(none)]> CREATE DATABASE cinder; Query OK, 1 row affected (0.01 sec)  MariaDB [(none)]> GRANT ALL PRIVILEGES ON cinder.* TO 'cinder'@'%'  IDENTIFIED BY 'cinder'; Query OK, 0 rows affected (0.01 sec)  MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.00 sec)  MariaDB [(none)]>  

  验证:在其他节点使用cinder用户登录数据库,看看创建的cinder用户是否可以正常登录数据库?

[root@node01 ~]# mysql -ucinder -pcinder -hnode02 Welcome to the MariaDB monitor.  Commands end with ; or g. Your MariaDB connection id is 319 Server version: 10.1.20-MariaDB MariaDB Server  Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.  Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.  MariaDB [(none)]> show databases; +--------------------+ | Database           | +--------------------+ | cinder             | | information_schema | | test               | +--------------------+ 3 rows in set (0.00 sec)  MariaDB [(none)]> exit Bye [root@node01 ~]#  

  在控制节点上导出admin用户环境变量,创建cinder用户并将其域指向default,密码设置为cinder

[root@node01 ~]# source admin.sh  [root@node01 ~]# openstack user create --domain default --password-prompt cinder User Password: Repeat User Password: +---------------------+----------------------------------+ | Field               | Value                            | +---------------------+----------------------------------+ | domain_id           | 47c0915c914c49bb8670703e4315a80f | | enabled             | True                             | | id                  | a795dd0941e942da85291177fe434f60 | | name                | cinder                           | | options             | {}                               | | password_expires_at | None                             | +---------------------+----------------------------------+ [root@node01 ~]#  

  将cinder用户添加到service项目,并授权为admin角色权限

[root@node01 ~]# openstack role add --project service --user cinder admin [root@node01 ~]#  

  创建cinderv2和cinderv3服务

[root@node01 ~]#  openstack service create --name cinderv2  >   --description "OpenStack Block Storage" volumev2 +-------------+----------------------------------+ | Field       | Value                            | +-------------+----------------------------------+ | description | OpenStack Block Storage          | | enabled     | True                             | | id          | 1145b9f35e3f419bb707f0d500bc2e3b | | name        | cinderv2                         | | type        | volumev2                         | +-------------+----------------------------------+ [root@node01 ~]# openstack service create --name cinderv3  >   --description "OpenStack Block Storage" volumev3 +-------------+----------------------------------+ | Field       | Value                            | +-------------+----------------------------------+ | description | OpenStack Block Storage          | | enabled     | True                             | | id          | aa142423921d408db8ba8dc7e48784f0 | | name        | cinderv3                         | | type        | volumev3                         | +-------------+----------------------------------+ [root@node01 ~]#  

  提示:cinder有两个版本,这两个版本都要创建服务端点;

  分别注册cinderv2和cinderv3到公共、私有、管理端点

  cinderv2公共端点

[root@node01 ~]# openstack endpoint create --region RegionOne  >   volumev2 public http://controller:8776/v2/%(project_id)s +--------------+------------------------------------------+ | Field        | Value                                    | +--------------+------------------------------------------+ | enabled      | True                                     | | id           | b60100d78284490a886b8b134f730b76         | | interface    | public                                   | | region       | RegionOne                                | | region_id    | RegionOne                                | | service_id   | 1145b9f35e3f419bb707f0d500bc2e3b         | | service_name | cinderv2                                 | | service_type | volumev2                                 | | url          | http://controller:8776/v2/%(project_id)s | +--------------+------------------------------------------+ [root@node01 ~]#  

  cinderv2私有端点

[root@node01 ~]# openstack endpoint create --region RegionOne  >   volumev2 internal http://controller:8776/v2/%(project_id)s +--------------+------------------------------------------+ | Field        | Value                                    | +--------------+------------------------------------------+ | enabled      | True                                     | | id           | 8c5b226eab8e4882af33e09e91f5a478         | | interface    | internal                                 | | region       | RegionOne                                | | region_id    | RegionOne                                | | service_id   | 1145b9f35e3f419bb707f0d500bc2e3b         | | service_name | cinderv2                                 | | service_type | volumev2                                 | | url          | http://controller:8776/v2/%(project_id)s | +--------------+------------------------------------------+ [root@node01 ~]#  

  cinderv2管理端点

[root@node01 ~]#  openstack endpoint create --region RegionOne  >   volumev2 admin http://controller:8776/v2/%(project_id)s +--------------+------------------------------------------+ | Field        | Value                                    | +--------------+------------------------------------------+ | enabled      | True                                     | | id           | b0d35d4b02954fe0a335f8e94365471d         | | interface    | admin                                    | | region       | RegionOne                                | | region_id    | RegionOne                                | | service_id   | 1145b9f35e3f419bb707f0d500bc2e3b         | | service_name | cinderv2                                 | | service_type | volumev2                                 | | url          | http://controller:8776/v2/%(project_id)s | +--------------+------------------------------------------+ [root@node01 ~]#  

  cinderv3公共端点

[root@node01 ~]# openstack endpoint create --region RegionOne  >   volumev3 public http://controller:8776/v3/%(project_id)s +--------------+------------------------------------------+ | Field        | Value                                    | +--------------+------------------------------------------+ | enabled      | True                                     | | id           | dff608b23a6b45cebb44d54c7ff68718         | | interface    | public                                   | | region       | RegionOne                                | | region_id    | RegionOne                                | | service_id   | aa142423921d408db8ba8dc7e48784f0         | | service_name | cinderv3                                 | | service_type | volumev3                                 | | url          | http://controller:8776/v3/%(project_id)s | +--------------+------------------------------------------+ [root@node01 ~]#  

  cinderv3私有端点

[root@node01 ~]# openstack endpoint create --region RegionOne  >   volumev3 internal http://controller:8776/v3/%(project_id)s +--------------+------------------------------------------+ | Field        | Value                                    | +--------------+------------------------------------------+ | enabled      | True                                     | | id           | 240ea84001e740c7b1514122e38cdca8         | | interface    | internal                                 | | region       | RegionOne                                | | region_id    | RegionOne                                | | service_id   | aa142423921d408db8ba8dc7e48784f0         | | service_name | cinderv3                                 | | service_type | volumev3                                 | | url          | http://controller:8776/v3/%(project_id)s | +--------------+------------------------------------------+ [root@node01 ~]#  

  cinderv3管理端点

[root@node01 ~]# openstack endpoint create --region RegionOne  >   volumev3 admin http://controller:8776/v3/%(project_id)s +--------------+------------------------------------------+ | Field        | Value                                    | +--------------+------------------------------------------+ | enabled      | True                                     | | id           | 19b83da138564fb586ddd0f9edf57c67         | | interface    | admin                                    | | region       | RegionOne                                | | region_id    | RegionOne                                | | service_id   | aa142423921d408db8ba8dc7e48784f0         | | service_name | cinderv3                                 | | service_type | volumev3                                 | | url          | http://controller:8776/v3/%(project_id)s | +--------------+------------------------------------------+ [root@node01 ~]#  

  安装openstack-cinder软件包

[root@node01 ~]# yum install openstack-cinder -y 

  编辑配置文件/etc/cinder/cinder.conf,在【database】配置段配置连接cinder数据库的地址

云计算管理平台之OpenStack块存储服务cinder

  在【DEFAULT】配置段配置使用keystone来做认证以及rabbitmq连接地址

云计算管理平台之OpenStack块存储服务cinder

  在【keystone_authtoken】配置段配置去keystone认证的相关信息

云计算管理平台之OpenStack块存储服务cinder

  在【DEFAULT】配置段配置my_ip为本地ip地址

云计算管理平台之OpenStack块存储服务cinder

  在【oslo_concurrency】配置段配置存放锁文件路径

云计算管理平台之OpenStack块存储服务cinder

  cinder.conf的最终配置

[root@node01 ~]# grep -i ^"[a-z[]" /etc/cinder/cinder.conf [DEFAULT] transport_url = rabbit://openstack:openstack123@node02 auth_strategy = keystone my_ip = 192.168.0.41 [backend] [backend_defaults] [barbican] [brcd_fabric_example] [cisco_fabric_example] [coordination] [cors] [database] connection = mysql+pymysql://cinder:cinder@node02/cinder [fc-zone-manager] [healthcheck] [key_manager] [keystone_authtoken] www_authenticate_uri = http://controller:5000 auth_url = http://controller:5000 memcached_servers = node02:11211 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = cinder password = cinder [matchmaker_redis] [nova] [oslo_concurrency] lock_path = /var/lib/cinder/tmp [oslo_messaging_amqp] [oslo_messaging_kafka] [oslo_messaging_notifications] [oslo_messaging_rabbit] [oslo_messaging_zmq] [oslo_middleware] [oslo_policy] [oslo_reports] [oslo_versionedobjects] [profiler] [sample_remote_file_source] [service_user] [ssl] [vault] [root@node01 ~]#  

  填充数据库

[root@node01 ~]# su -s /bin/sh -c "cinder-manage db sync" cinder Deprecated: Option "logdir" from group "DEFAULT" is deprecated. Use option "log-dir" from group "DEFAULT". [root@node01 ~]#  

  验证:在cinder库中,查看是否有表生成?

MariaDB [(none)]> use cinder Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A  Database changed MariaDB [cinder]> show tables; +----------------------------+ | Tables_in_cinder           | +----------------------------+ | attachment_specs           | | backup_metadata            | | backups                    | | cgsnapshots                | | clusters                   | | consistencygroups          | | driver_initiator_data      | | encryption                 | | group_snapshots            | | group_type_projects        | | group_type_specs           | | group_types                | | group_volume_type_mapping  | | groups                     | | image_volume_cache_entries | | messages                   | | migrate_version            | | quality_of_service_specs   | | quota_classes              | | quota_usages               | | quotas                     | | reservations               | | services                   | | snapshot_metadata          | | snapshots                  | | transfers                  | | volume_admin_metadata      | | volume_attachment          | | volume_glance_metadata     | | volume_metadata            | | volume_type_extra_specs    | | volume_type_projects       | | volume_types               | | volumes                    | | workers                    | +----------------------------+ 35 rows in set (0.00 sec)  MariaDB [cinder]>  

  编辑控制节点/etc/nova/nova.conf配置文件,在【cinder】配置段配置nova使用cinder服务

[cinder] os_region_name = RegionOne

云计算管理平台之OpenStack块存储服务cinder

  重启nova服务

[root@node01 ~]# systemctl restart openstack-nova-api.service  [root@node01 ~]# ss -tnl State      Recv-Q Send-Q                      Local Address:Port                                     Peer Address:Port               LISTEN     0      128                                     *:9292                                                *:*                   LISTEN     0      128                                     *:22                                                  *:*                   LISTEN     0      100                             127.0.0.1:25                                                  *:*                   LISTEN     0      100                                     *:6080                                                *:*                   LISTEN     0      128                                     *:9696                                                *:*                   LISTEN     0      128                                     *:8774                                                *:*                   LISTEN     0      128                                     *:8775                                                *:*                   LISTEN     0      128                                     *:9191                                                *:*                   LISTEN     0      128                                    :::80                                                 :::*                   LISTEN     0      128                                    :::22                                                 :::*                   LISTEN     0      100                                   ::1:25                                                 :::*                   LISTEN     0      128                                    :::5000                                               :::*                   LISTEN     0      128                                    :::8778                                               :::*                   [root@node01 ~]#  

  提示:重启请确保nova-api服务所监听端口(8774/8775)处于正常监听;

  启动cinder-api和cinder-scheduler服务,并将其设置为开机启动

[root@node01 ~]# systemctl start openstack-cinder-api.service openstack-cinder-scheduler.service [root@node01 ~]# systemctl enable openstack-cinder-api.service openstack-cinder-scheduler.service Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-cinder-api.service to /usr/lib/systemd/system/openstack-cinder-api.service. Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-cinder-scheduler.service to /usr/lib/systemd/system/openstack-cinder-scheduler.service. [root@node01 ~]# ss -tnl State      Recv-Q Send-Q                      Local Address:Port                                     Peer Address:Port               LISTEN     0      128                                     *:9292                                                *:*                   LISTEN     0      128                                     *:22                                                  *:*                   LISTEN     0      100                             127.0.0.1:25                                                  *:*                   LISTEN     0      100                                     *:6080                                                *:*                   LISTEN     0      128                                     *:9696                                                *:*                   LISTEN     0      128                                     *:8774                                                *:*                   LISTEN     0      128                                     *:8775                                                *:*                   LISTEN     0      128                                     *:9191                                                *:*                   LISTEN     0      128                                     *:8776                                                *:*                   LISTEN     0      128                                    :::80                                                 :::*                   LISTEN     0      128                                    :::22                                                 :::*                   LISTEN     0      100                                   ::1:25                                                 :::*                   LISTEN     0      128                                    :::5000                                               :::*                   LISTEN     0      128                                    :::8778                                               :::*                   [root@node01 ~]#  

  提示:请确保8776端口处于正常监听就说明cinder服务启动正常;或者直接查看有没有cinder进程启动,以此来判断cinder服务是否都启动正常;如下

云计算管理平台之OpenStack块存储服务cinder

  到此,在控制节点安装配置cinder-api和cinder-scheduler服务就完成了;

  2、在cinder storage节点安装配置cinder-volume服务

  storage node 环境说明,配置好yum仓库,时间同步,以及主机名解析等等;有关基础环境的配置,请参考https://www.cnblogs.com/qiuhom-1874/p/13886693.html;为了演示,我在node05上附加了三块20g的硬盘,方便待会测试;

  准备好基础环境后,接下来开始cinder-volume服务需要的包

[root@node05 ~]# yum install lvm2 device-mapper-persistent-data -y 

  启动lvm2-lvmetad服务并将其设置为开机启动

[root@node05 ~]# systemctl start lvm2-lvmetad.service [root@node05 ~]# systemctl enable lvm2-lvmetad.service [root@node05 ~]#  

  查看node05上的硬盘

云计算管理平台之OpenStack块存储服务cinder

  把/dev/sdb整块盘创建一个pv

[root@node05 ~]# pvcreate /dev/sdb   Physical volume "/dev/sdb" successfully created. [root@node05 ~]# 

  创建vg

[root@node05 ~]# vgcreate cinder-volumes /dev/sdb   Volume group "cinder-volumes" successfully created [root@node05 ~]#  

  编辑lvm配置文件/etc/lvm/lvm.conf,将其只允许扫描我们附加的三块磁盘和本地/dev/sda,默认lvm会扫描整个/dev下的所有设备

云计算管理平台之OpenStack块存储服务cinder

  安装openstack-cinder targetcli python-keystone包

[root@node05 ~]# yum install openstack-cinder targetcli python-keystone -y 

  编辑配置文件/etc/cinder/cinder.conf,在【database】配置段配置连接cinder数据库相关信息

云计算管理平台之OpenStack块存储服务cinder

  在【DEFAULT】配置段配置连接rabbitmq相关信息,配置认证策略为keystone,配置my_ip为本地和控制节点通信网卡ip地址

云计算管理平台之OpenStack块存储服务cinder

  在【keystone_authtoken】配置段配置去keystone认证相关信息

云计算管理平台之OpenStack块存储服务cinder

  在【lvm】配置段配置连接lvm相关驱动,vg,以及使用的传输协议;默认配置文件中没有【lvm】配置段,我们可以在配置文件的末尾添加【lvm】配置段,把对应要配置的内容配置上就好;

[lvm] volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volume_group = cinder-volumes iscsi_protocol = iscsi iscsi_helper = lioadm 

  提示:这里的volume_group要和我们之前创建的vg名称保持一致;

  在【DEFAULT】配置段开启lvm back end,以及连接glance服务的地址

云计算管理平台之OpenStack块存储服务cinder

  在【oslo_concurrency】配置锁路径

云计算管理平台之OpenStack块存储服务cinder

  cinder.conf最终配置

[root@node05 ~]#  [root@node05 ~]# grep -i ^"[a-z[]" /etc/cinder/cinder.conf [DEFAULT] my_ip = 192.168.0.45 transport_url = rabbit://openstack:openstack123@node02 auth_strategy = keystone enabled_backends = lvm glance_api_servers = http://controller:9292 [backend] [backend_defaults] [barbican] [brcd_fabric_example] [cisco_fabric_example] [coordination] [cors] [database] connection = mysql+pymysql://cinder:cinder@node02/cinder [fc-zone-manager] [healthcheck] [key_manager] [keystone_authtoken] www_authenticate_uri = http://controller:5000 auth_url = http://controller:5000 memcached_servers = node02:11211 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = cinder password = cinder [matchmaker_redis] [nova] [oslo_concurrency] lock_path = /var/lib/cinder/tmp [oslo_messaging_amqp] [oslo_messaging_kafka] [oslo_messaging_notifications] [oslo_messaging_rabbit] [oslo_messaging_zmq] [oslo_middleware] [oslo_policy] [oslo_reports] [oslo_versionedobjects] [profiler] [sample_remote_file_source] [service_user] [ssl] [vault] [lvm] volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volume_group = cinder-volumes iscsi_protocol = iscsi iscsi_helper = lioadm [root@node05 ~]#  

  启动服务,并将其设置为开机启动

[root@node05 ~]# systemctl start openstack-cinder-volume.service target.service [root@node05 ~]# systemctl enable openstack-cinder-volume.service target.service       Created symlink from /etc/systemd/system/multi-user.target.wants/openstack-cinder-volume.service to /usr/lib/systemd/system/openstack-cinder-volume.service. Created symlink from /etc/systemd/system/multi-user.target.wants/target.service to /usr/lib/systemd/system/target.service. [root@node05 ~]#  

  验证:查看服务是否正常启动

云计算管理平台之OpenStack块存储服务cinder

  提示:能够看到cinder-volume进程启动,说明服务启动没有问题;

  到此,在storage node上的配置就完成了;

  验证:在控制节点导出admin用户环境变量,使用openstack volume service list命令,看看是否能够列出服务组件信息?

[root@node01 ~]# source admin.sh  [root@node01 ~]# openstack volume service list +------------------+---------------------+------+---------+-------+----------------------------+ | Binary           | Host                | Zone | Status  | State | Updated At                 | +------------------+---------------------+------+---------+-------+----------------------------+ | cinder-volume    | node05.test.org@lvm | nova | enabled | up    | 2020-11-02T13:58:10.000000 | | cinder-scheduler | node01.test.org     | nova | enabled | up    | 2020-11-02T13:58:10.000000 | +------------------+---------------------+------+---------+-------+----------------------------+ [root@node01 ~]#  

  提示:能够列出cinder-scheduler和cinder-volume这两个组件就表示我们在控制节点和storage 节点上安装的组件没有问题;

  验证:导出demo用户环境,创建卷,看看是否能够正常创建?

[root@node01 ~]# source demo.sh  [root@node01 ~]# openstack volume create --size 1 volume1 +---------------------+--------------------------------------+ | Field               | Value                                | +---------------------+--------------------------------------+ | attachments         | []                                   | | availability_zone   | nova                                 | | bootable            | false                                | | consistencygroup_id | None                                 | | created_at          | 2020-11-02T14:16:37.000000           | | description         | None                                 | | encrypted           | False                                | | id                  | f41c1ad9-8fb3-426c-bb63-33dafabfd47d | | multiattach         | False                                | | name                | volume1                              | | properties          |                                      | | replication_status  | None                                 | | size                | 1                                    | | snapshot_id         | None                                 | | source_volid        | None                                 | | status              | creating                             | | type                | None                                 | | updated_at          | None                                 | | user_id             | 5453d68782a34429a7dab7da9c51f0d9     | +---------------------+--------------------------------------+ [root@node01 ~]#  

  查看当前用户的卷列表

[root@node01 ~]# openstack volume list +--------------------------------------+---------+-----------+------+-------------+ | ID                                   | Name    | Status    | Size | Attached to | +--------------------------------------+---------+-----------+------+-------------+ | f41c1ad9-8fb3-426c-bb63-33dafabfd47d | volume1 | available |    1 |             | +--------------------------------------+---------+-----------+------+-------------+ [root@node01 ~]#  

  在storage 节点上查看逻辑卷,看看是否有我们刚才创建的卷呢?

云计算管理平台之OpenStack块存储服务cinder

  将卷附加到某个虚拟机实例上

[root@node01 ~]# openstack server list +--------------------------------------+-----------+---------+----------------------------------------------+--------+---------+ | ID                                   | Name      | Status  | Networks                                     | Image  | Flavor  | +--------------------------------------+-----------+---------+----------------------------------------------+--------+---------+ | 057103fc-97eb-4f5b-910d-beddccd3bd22 | test_vm-3 | SHUTOFF | provider-net=192.168.0.124                   | cirros | m1.nano | | 32622be2-47dc-47c8-b0ef-c5c5c85eb9ba | test_vm-1 | SHUTOFF | provider-net=192.168.0.102                   | cirros | m1.nano | | 5523730d-9dc4-4827-b53a-43f3c860b838 | test_vm-2 | SHUTOFF | provider-net=192.168.0.119                   | cirros | m1.nano | | 3f220e22-50ce-4068-9b0b-cd9c07446e6c | demo_vm2  | SHUTOFF | demo_selfservice_net=10.0.1.2, 192.168.0.104 | cirros | m1.nano | | a9f76200-0636-48ab-9eda-69526dab0653 | demo_vm1  | SHUTOFF | provider-net=192.168.0.103                   | cirros | m1.nano | +--------------------------------------+-----------+---------+----------------------------------------------+--------+---------+ [root@node01 ~]# openstack volume list +--------------------------------------+---------+-----------+------+-------------+ | ID                                   | Name    | Status    | Size | Attached to | +--------------------------------------+---------+-----------+------+-------------+ | f41c1ad9-8fb3-426c-bb63-33dafabfd47d | volume1 | available |    1 |             | +--------------------------------------+---------+-----------+------+-------------+ [root@node01 ~]# openstack server add volume demo_vm1 volume1 [root@node01 ~]# openstack volume list +--------------------------------------+---------+--------+------+-----------------------------------+ | ID                                   | Name    | Status | Size | Attached to                       | +--------------------------------------+---------+--------+------+-----------------------------------+ | f41c1ad9-8fb3-426c-bb63-33dafabfd47d | volume1 | in-use |    1 | Attached to demo_vm1 on /dev/vdb  | +--------------------------------------+---------+--------+------+-----------------------------------+ [root@node01 ~]#  

  提示:可以看到当把某个卷附加给某个虚拟机实例以后,再次查看卷的状态就变成了in-use状态,并明确说明该卷附加在那个实例之上,并识别成那个设备;

  验证:连接对应虚拟机,查看是否有/dev/vdb的设备附加到虚拟机上?

云计算管理平台之OpenStack块存储服务cinder

  在demo_vm1上对/dev/vdb进行分区

[root@node01 ~]# ssh cirros@192.168.0.103 $ sudo su - # fdisk -l /dev/vdb Disk /dev/vdb: 1 GiB, 1073741824 bytes, 2097152 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes # fdisk  /dev/vdb  Welcome to fdisk (util-linux 2.27). Changes will remain in memory only, until you decide to write them. Be careful before using the write command.  Device does not contain a recognized partition table. Created a new DOS disklabel with disk identifier 0xcc2cfc07.  Command (m for help): n Partition type    p   primary (0 primary, 0 extended, 4 free)    e   extended (container for logical partitions) Select (default p): p Partition number (1-4, default 1):  First sector (2048-2097151, default 2048):  Last sector, +sectors or +size{K,M,G,T,P} (2048-2097151, default 2097151): +300M   Created a new partition 1 of type 'Linux' and of size 300 MiB.  Command (m for help): p Disk /dev/vdb: 1 GiB, 1073741824 bytes, 2097152 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xcc2cfc07  Device     Boot Start    End Sectors  Size Id Type /dev/vdb1        2048 616447  614400  300M 83 Linux  Command (m for help): w The partition table has been altered. Calling ioctl() to re-read partition table. Syncing disks.  #  

  格式化/dev/vdb1,并将其挂在至/mnt目录

# mkfs.ext4 /dev/vdb1 mke2fs 1.42.12 (29-Aug-2014) Creating filesystem with 307200 1k blocks and 76912 inodes Filesystem UUID: bc228b69-bc7d-47ff-81bd-2b5a2291aa02 Superblock backups stored on blocks:          8193, 24577, 40961, 57345, 73729, 204801, 221185  Allocating group tables: done                             Writing inode tables: done                             Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done   # mount /dev/vdb1 /mnt # df -Th Filesystem           Type            Size      Used Available Use% Mounted on /dev                 devtmpfs       19.2M         0     19.2M   0% /dev /dev/vda1            ext3          978.9M     24.1M    914.0M   3% / tmpfs                tmpfs          23.2M         0     23.2M   0% /dev/shm tmpfs                tmpfs          23.2M     88.0K     23.1M   0% /run /dev/vdb1            ext4          282.5M      2.0M    261.5M   1% /mnt #  

  提示:可以看到格式化成功,并成功挂载至/mnt

  复制文件到/mnt下进行存储,看看是否可正常存储?

# ls -l /mnt total 12 drwx------    2 root     root         12288 Nov  1 15:22 lost+found # cp /etc/passwd /mnt # ls -l /mnt total 13 drwx------    2 root     root         12288 Nov  1 15:22 lost+found -rw-------    1 root     root           586 Nov  1 15:24 passwd # cat /mnt/passwd  root:x:0:0:root:/root:/bin/sh daemon:x:1:1:daemon:/usr/sbin:/bin/sh bin:x:2:2:bin:/bin:/bin/sh sys:x:3:3:sys:/dev:/bin/sh sync:x:4:100:sync:/bin:/bin/sync mail:x:8:8:mail:/var/spool/mail:/bin/sh proxy:x:13:13:proxy:/bin:/bin/sh www-data:x:33:33:www-data:/var/www:/bin/sh backup:x:34:34:backup:/var/backups:/bin/sh operator:x:37:37:Operator:/var:/bin/sh haldaemon:x:68:68:hald:/:/bin/sh dbus:x:81:81:dbus:/var/run/dbus:/bin/sh ftp:x:83:83:ftp:/home/ftp:/bin/sh nobody:x:99:99:nobody:/home:/bin/sh sshd:x:103:99:Operator:/var:/bin/sh cirros:x:1000:1000:non-root user:/home/cirros:/bin/sh #  

  提示:可以看到可以正常的存入文件,读取文件内容都没有问题;

  重启虚拟机,看看卷是否会自动挂载到对应虚拟机呢?

云计算管理平台之OpenStack块存储服务cinder

  再启动虚拟机

云计算管理平台之OpenStack块存储服务cinder

  查看虚拟机是否有之前的块设备?是否自动挂载了?数据是否有丢失?

[root@node01 ~]# ssh cirros@192.168.0.103 $ sudo su - # df -Th Filesystem           Type            Size      Used Available Use% Mounted on /dev                 devtmpfs       19.2M         0     19.2M   0% /dev /dev/vda1            ext3          978.9M     24.1M    914.0M   3% / tmpfs                tmpfs          23.2M         0     23.2M   0% /dev/shm tmpfs                tmpfs          23.2M     88.0K     23.1M   0% /run # fdisk -l /dev/vdb Disk /dev/vdb: 1 GiB, 1073741824 bytes, 2097152 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xcc2cfc07  Device     Boot Start    End Sectors  Size Id Type /dev/vdb1        2048 616447  614400  300M 83 Linux # mount /dev/vdb1 /mnt # ls -l /mnt total 13 drwx------    2 root     root         12288 Nov  1 15:22 lost+found -rw-------    1 root     root           586 Nov  1 15:24 passwd # cat /mnt/passwd root:x:0:0:root:/root:/bin/sh daemon:x:1:1:daemon:/usr/sbin:/bin/sh bin:x:2:2:bin:/bin:/bin/sh sys:x:3:3:sys:/dev:/bin/sh sync:x:4:100:sync:/bin:/bin/sync mail:x:8:8:mail:/var/spool/mail:/bin/sh proxy:x:13:13:proxy:/bin:/bin/sh www-data:x:33:33:www-data:/var/www:/bin/sh backup:x:34:34:backup:/var/backups:/bin/sh operator:x:37:37:Operator:/var:/bin/sh haldaemon:x:68:68:hald:/:/bin/sh dbus:x:81:81:dbus:/var/run/dbus:/bin/sh ftp:x:83:83:ftp:/home/ftp:/bin/sh nobody:x:99:99:nobody:/home:/bin/sh sshd:x:103:99:Operator:/var:/bin/sh cirros:x:1000:1000:non-root user:/home/cirros:/bin/sh #  

  提示:可以看到重启虚拟机它并不会自动帮我们挂载,原因是我们没有配置它自动挂载;但是虚拟机重启以后,块设备会自动和虚拟机关联;我们只需要配置对应的设备开机挂载就行;

  到此cinder服务安装配置以及测试就完成了;这也意味着我们现有的openstack环境之上运行的虚拟机,可以拥有真正意义上的持久存储功能;只要我们的storage 节点不故障,保存在上面的卷就没有问题,虚拟机在卷上存储的数据就不会丢;

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