I'm trying to get Packer to build a Docker image, then run a container from
that image and execute a few tests against the running container _before_
pushing the image back to a Docker registry. I want to _only_ push the
image if tests pass. Otherwise, I want the build to fail and _not_ push
anything.
I've tried putting a "shell-local" post-processing step in between the
"docker-tag" and the "docker-push" post-processing steps (pasted below).
The tests run as expected, but then the build fails on "docker-push" with
"Can only import from docker-import and docker-tag artifacts". This makes
sense I guess - I lose the Docker artifact once I run the shell-local step
so it doesn't know what I'm asking it to push. I've explored "manifest"
and "artifice" post-processors among other things but I haven't yet figured
out how to make it work the way I want.
Is what I'm trying to do possible with Packer?
Thanks!
...
"builders": [
{
"type": "docker",
"image": "{{user `base_image_repository`}}:latest",
"commit": true,
"ecr_login": true,
"login_server": "{{user `ecr_login_server`}}",
"changes": [
"CMD /opt/app/run.sh"
]
}
],
"provisioners": [
...
],
"post-processors": [
[
{
"type": "docker-tag",
"repository": "{{user `docker_repository`}}",
"tag": "{{user `version`}}"
},
{
"type": "shell-local",
"script": "./test-container.sh",
"environment_vars": ["IMAGE_AND_TAG={{user
`docker_repository`}}:{{user `version`}}", "LEVEL={{user `level`}}"]
},
{
"type": "docker-push",
"ecr_login": true,
"login_server": "{{user `ecr_login_server`}}"
}
]
]
}
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