Snapshotting an instance

Snapshotting an instance will create a Glance image of the instance at the point in time the snapshot was taken. This image can then be used to deploy additional instances of a given application, or as a bootable backup of the instance.

Getting ready

In order to create a snapshot of an instance, you require the following information:

  • The openstack command-line client
  • The openrc file containing appropriate credentials
  • The name of the instance

How to do it…

The following commands are used to create an instance snapshot:

  1. First, we list the existing images with the following command:
    openstack image list -c Name -c Status

    This will bring back a list of images like the following:

  2. Now list the running instances with the following command: ...

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