How to specify image tag/digest at build time

[madrum]

I have a pipeline building and publishing an image of my application, e.g. myapp:1.0.2.
After that step, I want to publish a Porter bundle with that version of the application, plus scripts and charts needed for the deployment, for an air-gapped environment.

The porter.yaml file will need the tag/digest value updated to allow the image to be added to the porter bundle when porter build/publish is ran. I do not see how to accomplish this with the porter CLI as you cannot pass parameters into the porter build/publish commands.

Does the Porter CLI allow for setting the image tag/digest when running porter build or porter publish? Or, is it expected to manually edit the porter.yaml file, like with a sed command?

Thanks, Mike

[carolynvs]

We are working on adding build argument support for the v1 release (in #1789, #1769 and #1124). Until that's implemented, you will need to use tools like sed to edit the porter.yaml as a stopgap measure.

Once it is in place you should be able to use this:

porter build --custom myimageDigest sha256:abc123

name: mybundle

custom:
  myimageDigest: "sha256:85b1a9b4b60a4cf73a23517dad677e64edf467107fa7d58fce9c50e6a3e4c914" # default digest to use

images:
  myimage:
      description: "A simple web service"
      imageType: "docker"
      repository: "jeremyrickard/devops-days-msp"
      digest: "{{bundle.custom.myimageDigest}}"

[madrum]

thank you!

[DevOpsDrum]

For anyone interested, I was able to add a step to my pipeline to read in the porter yaml file as an object, using PowerShell and the powershell-yaml module, update the appropriate image tag values, then update the porter.yaml file on the file system.

Install-Module -Name 'powershell-yaml'
$porterYamlPath = '/porter/porter.yaml'

# read porter.yaml in as object
$porterObj = Get-Content $porterYamlPath -Raw | ConvertFrom-Yaml

# update tag value(s) in object
$porterObj.images.myImageName.tag = "1.2.3.4"
$porterObj.images.myOtherImageName.tag = "latest"

# overwrite contents of porter.yaml with updated version of the object
Set-Content $porterYamlPath -Value ($porterObj | ConvertTo-Yaml) -Force

[DevOpsDrum]

The changes incorporated with PR 900 do not allow you to set an image digest or tag value as Carolyn showed in the example. My porter.yaml file looks essentially the same as her example, but using ${ bundle.custom.myimageDigest} syntax, so I'll create an issue to extend the custom value functionality to the image properties.