Filter unused disks

[Damir Markovic]

Hello,
I am trying to get the list of unused disks by using gcloud util.

Disks that are used have defined users:
    "users": [
      "https://www.googleapis.com/compute/v1/projects/compute-engine-666/zones/us-central1-b/instances/wicked_instance"
    ],

Others don't have users key at all.

How to do something like this:
gcloud compute disks list --filter="users not defined"

Documentation is really vague and incomplete.

Thank you.

[Michael Basilyan]

I looked through the documentation (did you see this?) and I agree it's not clear on how to query whether a key is missing. Fortunately, you can determine if a key is present just by doing this: 

gcloud compute disks list --filter="users:*" > used.txt 

to get a list of disks that have users and then 

gcloud compute disks list  > all-disks.txt 

and then just find the difference: 

grep -Fxv -f used.txt all-disks.txt

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[Michael Basilyan]

Sorry linked to the wrong doc. Here's the filters documentation: https://cloud.google.com/sdk/gcloud/reference/topic/filters

[Damir Markovic]

Yeah, this totally works.

I did saw that doc, just missed "and the pattern * matches any non-empty string". But `users` is not even a string. :-)

Thank you very much!

[Michael Basilyan]

Quick follow up (in case someone needs this in the future): turns out you can actually just do this to find disks without the users key (not the - in front of users) -- no need for grep magic :). 

gcloud compute disks list --filter="-users:*"

The docs team will update the documentation to make this clearer too. 

Mike

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[santhosh chakilam]

Hello Team , 

Quick question, 

1. If there is a persistent disk that is lying around and not attached to any instance , can we assume that it would not be used by any other resource on google cloud ? In other ways " the only way to access a persistent disk is through an instance " - Is my understanding correct. 

  

2. How would I know when was the persistent disk last used ?