docker 1.13 about cloud-builders HOT 12 CLOSED

I'll see about getting an example in there.

In the meantime, this cloudbuild.yaml will do a docker build that uses, as its cache, the previous image built by the same config file.

steps:
- name: 'gcr.io/cloud-builders/docker'
  args: ['pull', 'gcr.io/$PROJECT_ID/my-image']
- name: 'gcr.io/cloud-builders/docker'
  args: ['build', '--cache-from', 'gcr.io/$PROJECT_ID/my-image', '-t', 'gcr.io/$PROJECT_ID/my-image', '.']
images: ['gcr.io/$PROJECT_ID/my-image']

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Hi Daniel,

We are looking into this upgrade, but have no specific date yet.

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We have now upgraded to Docker 17.05, so --cache-from is available. Let us know how it goes!

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i can't seem to get --cache-from to work

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Did you docker pull the image into the job first? --cache-from won't work unless the image is already available on the host. Seems like an odd design choice on their part, but there you go.

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This works for me, but a minimal cloudbuild.yaml example that included both the pull and build with --cache-from would have helped me.

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yea.. figured it out right after writing.. sadly the pull step is really slow 😞 and in the end my build time only went down from 11 mins to around 8. still an improvement, but i was hoping for more.

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How big is your image and how long does it take to pull?

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i think my image is 1.6GB i have moved everything to us.gcr.io to try and get the pull time down, but it aint helping much. i'll have to try and slim down my image, i found out that i can slim it at least 400mb by removing some duplicated images.

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A 1.6GB image will likely take several minutes to download. If you point me at your build process I'd be happy to consult on slimming the image (one of my secret hobbies).

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The problem is that google hasn't found a way to add backend_buckets to ingress on GKE, so right now i'm uploading all of my static files to the docker image to get automatic CDN. And since i'm using django all my static files are duplicated for cache-busting. I'm currently working on moving my static files to cloud storage and for now it seems i have to pay for an extra load balancer to get CDN support for those files.

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If you have duplicated files in multiple layers, you might benefit from squashing them. See https://stackoverflow.com/questions/41764336/how-does-the-new-docker-squash-work

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