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Instance metadata

asked 2016-11-13 11:34:12 -0600

Mustafa gravatar image


I am new to OpenStack, and while doing some research came across a question stating "how to set metadata on an instance?".

I have googled but have not yet found any solid explanation on what exactly is VM metadata comprised of, why is it important and how to use it in an OpenStack environment?

Any help on the topic would be greatly appreciated.

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answered 2016-11-13 17:24:36 -0600

The concept of instance metadata comes from AWS. My definition: Instance metadata is a set of key-value pairs that the instance can query from OpenStack using the metadata API or the config drive. Some of that data can be essential for operating the instance, such as the ssh key, other parts are provided by OpenStack but not necessarily important, such as the instance's UUID, and users can set their own metadata to convey whatever information they need to the instance. You will find some information in the docs such as here, and you may learn how other people use metadata by, for example, searching on

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Asked: 2016-11-13 11:34:12 -0600

Seen: 2,005 times

Last updated: Nov 13 '16