CODEWITHSUNDEEP
bashdockergoogle-cloud-build
FrustratedWithFormsDesigner
FrustratedWithFormsDesigner

Reputation: 27486

dynamic image name in CloudBuilder

I am building docker images with dynamic tags in CloudBuilder. I would like to be able to then run that same image, but I'm having trouble getting it to work.

Here's what I've got:

steps:
- id: "Store value for docker image tag"
  name: ubuntu
  entrypoint: bash
  args:
   - -c
   - date +%Y%m%d%H%M%S > /workspace/image_tag.txt
- name: 'gcr.io/cloud-builders/docker'
  entrypoint: bash
  args: [ '-c', 'docker build -t gcr.io/blah/my_image:$(cat /workspace/image_tag.txt) -f src/Dockerfile ./src' ]
- name: 'gcr.io/cloud-builders/docker'
  entrypoint: bash
  args: [ '-c', 'docker push gcr.io/blah/my_image:$(cat /workspace/image_tag.txt)' ]
...

- name: 'gcr.io/blah/my_image:$(cat /workspace/image_tag.txt)'
  entrypoint: /bin/sh
  args:
  - -c
#  - execute some commands and script within the image...

(gcr.io/blah/my_image is a custom builder)

Obviously, the name 'gcr.io/blah/my_image:$(cat /workspace/image_tag.txt)' does not work, I get an error:

Your build failed to run: generic::invalid_argument: invalid build: invalid build step name "gcr.io/blah/my_image:$(cat /workspace/image_tag.txt)": could not parse reference: gcr.io/blah/my_image:$(cat /workspace/image_tag.txt)

The image gets pushed fine, but I want the a step that runs the image that got pushed earlier. Did I just mess up the syntax? If I can't do it as easily as I want, is there some other way to do this?

Upvotes: 0

Views: 274

Answers (1)

guillaume blaquiere
guillaume blaquiere

Reputation: 75765

If you want to interpret the content, use " instead of ', like that

- name: 'gcr.io/cloud-builders/docker'
  entrypoint: bash
  args: [ '-c', "docker build -t gcr.io/blah/my_image:$(cat /workspace/image_tag.txt) -f src/Dockerfile ./src" ]
- name: 'gcr.io/cloud-builders/docker'
  entrypoint: bash
  args: [ '-c', "docker push gcr.io/blah/my_image:$(cat /workspace/image_tag.txt)" ]

Upvotes: 1

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