08.存储Cinder→5.场景学习→06.Delete Volume

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背景：

1. 状态为 Available 的 volume 才能够被 delete
2. 如果 volume 当前已经 attach 到 instance，需要先 detach 后才能 delete。

描述

详细

1. 向 cinder-api 发送 delete 请求
1. 客户（可以是 OpenStack 最终用户，也可以是其他程序）向 cinder-api 发送请求：“请 delete 指定的 volume。”
2. 这里我们将 delete volume “vol-1”。进入 GUI 操作菜单 Project -> Volumes -> Volumes。

3. cinder-api 将接收到 delete volume 的请求。查看c-api日志文件：

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Jun 20 19:30:25 controller devstack@c-api.service[31309]: INFO cinder.api.openstack.wsgi [None req-03b18f0a-eee4-4855-ad8c-a0dfc4fa068f admin admin] DELETE http://172.16.1.17/volume/v3/51743f081cb7477f9a1f4ccdf6490d8e/ volumes/f0a54ac7-5423-4794-8883-d753f6a903cd

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Jun 20 19:30:25 controller devstack@c-api.service[31309]: INFO cinder.api.v3.volumes [None req-03b18f0a-eee4-4855-ad8c-a0dfc4fa068f admin admin] Delete volume with id: f0a54ac7-5423-4794-8883-d753f6a903cd

2. cinder-api 发送消息
1. cinder-api 发送消息 delete 消息。cinder-api 没有打印发送消息的日志，只能通过源代码查看 /opt/stack/cinder/cinder/volume/api.py，方法为 delete。

3. cinder-volume delete volume
1. cinder-volume 执行 lvremove 命令 delete volume

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Jun 20 19:30:27 controller cinder-volume[304]: DEBUG oslo_concurrency.processutils [None req-03b18f0a-eee4-4855-ad8c-a0dfc4fa068f admin None] CMD "sudo cinder-rootwrap /etc/cinder/rootwrap.conf lvremove --config activation { retry_deactivation = 1} -f stack-volumes-lvmdriver-1/volume-f0a54ac7-5423-4794-8883-d753f6a903cd" returned: 0 in 1.107s {{(pid=460) execute /usr/local/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:409

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Jun 20 19:30:27 controller cinder-volume[304]: I NFO cinder.volume.drivers.lvm [None req-03b18f0a-eee4-4855-ad8c-a0dfc4fa068f admin None] Successfully deleted volume: f0a54ac7-5423-4794-8883-d753f6a903cd