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use Google Computing Engine to run Monte Carlo by deploying Docker images, running them, deleting them, deploying more images, ...

If I look into disk usage of the bucket which has containers/images

gsutils du gs://bucket

I'll get close to 6Gb of space used

But! I know that right now there is only one docker image

gcloud container images list --repository=repo

and it should take no more than 1.5Gb.

Is there good and simple way to do garbage collection? How I could clean-up all images which are NOT used right now, and get storage usage down to something real?

Doug Stevenson
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Severin Pappadeux
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2 Answers2

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You can use the Cloud Console to delete some images that might have some unused tags.

You can also use the gcloud commands to list and delete them, here an example of the commands to be run:

gcloud container images list-tags gcr.io/project-id/hello-node
DIGEST        TAGS    TIMESTAMP
e302a6a81293  v1      2015-01-26T15:29:27
dac925b4030f  latest  2017-12-10T15:33:41

Untag your unused versions

gcloud container images untag gcr.io/project-id/hello-node:v1

List your images again

gcloud container images list-tags gcr.io/project-id/hello-node
DIGEST        TAGS    TIMESTAMP
e302a6a81293          2015-01-26T15:29:27
dac925b4030f  latest  2017-12-10T15:33:41

Delete your untag image, you need to use the following format for digest: gcr.io/repository@sha256:digest 

gcloud container images delete gcr.io/project-id/hello-node@sha256:e302a6a81293

So listing your images should give you now:

DIGEST        TAGS    TIMESTAMP
dac925b4030f  latest  2017-12-10T15:33:41

More info about the 'gcloud container images delete' in here. You can also delete the image and the tag at the same time using flag '--force-delete-tags':

gcloud container images delete gcr.io/project-id/hello-node@sha256:dac925b4030f --force-delete-tags
Marilu
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If it helps, here is little bash script which removes all matching images built before a given date: https://gist.github.com/27Bslash6/ba9dca6ca6b90c05d6bfa9136c667e9a

For example, to delete all gcr.io/things/stuff images older than 1st July 2017:

./gcrgc.sh gcr.io/things/stuff 2017-07-01

Includes an option to perform a trial run, listing images which would be deleted.

Ray Walker
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