Shulou(Shulou.com)06/01 Report--

How to understand Detach Volume operation, in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

We successfully added volume as instance through the attach operation, while the opposite operation is detach, which unloads volume from the instance.

Send a detach request to cinder-api

The customer (either an OpenStack end user or another program) sends a request to cinder-api: "Please detach specify the volume on the instance."

Here we enter the volume "vol-1" on detach instance "c2" into the GUI operation menu Project-> Compute-> Volumes.

Select volume "vol-1" and click "Manage Attachments".

Reconfirm.

Cinder-api sends messages

Cinder-api sends messages detach messages. Cinder-api does not print a log to send messages and can only view / opt/stack/cinder/cinder/volume/api.py from the source code, using detach.

At this point, you can see through virsh edit that the virtual disk of volume is no longer in the XML configuration file.

There are the following steps:

Flush the data in the cache to volume.

Disconnect from iSCSI target through the logout,delete operation of iscsiadm.

At this point, the detach volume operation has been completed, and GUI will update the attach information of volume.

This is the answer to the question about how to understand the operation of Detach Volume. I hope the above content can be of some help to you. If you still have a lot of doubts to solve, you can follow the industry information channel to learn more about it.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.