Tag: loops

On a pipeline that I was creating I wanted to push multiple docker images on an Azure container registry based on a list. In order to do that I used the docker@2 task on a loop providing the images that I had to push as a parameter. Code is attached below.

	trigger:
	– none
	pr: none
	parameters:
	– name: containerlist
	type: object
	default: ["core/image1","core/image2","core/image3","core/image4"]
	– name: DockerPushID
	type: string
	pool:
	name: demo-app
	stages:
	– stage: containers
	displayName: Push containers to container registry $(registry)
	jobs:
	– job: pushcontainers
	displayName: Push containers on testexample.azurecr.io
	steps:
	– checkout: none
	– ${{ each container in parameters.containerlist }}:
	– task: Docker@2
	displayName: pushing image ${{container}}
	inputs:
	containerRegistry: 'registryconnection'
	repository: '${{container}}'
	command: 'push'
	tags: |
	current-${{parameters.DockerPushID}}
	current-latest

view raw azure devops – push multiple images on azure container registry hosted with ❤ by GitHub

This task will run steps based on the images you provide on the parameters list. An important note is that you need to have the image named accordingly in order to get a successful result. For example if you need to push on geralexgr.azurecr.io you will need to have your images named as below.

geralexgr.azurecr.io/image1:current-latest
geralexgr.azurecr.io/image2:current-latest

Else you may notice some failures indicating the below.

The push refers to repository [***/kati/image1] 
An image does not exist locally with the tag: ***/kati/image1

A successful run of the pipeline.

Additional information regarding loops and expressions on Azure DevOps pipelines:

https://docs.microsoft.com/en-us/azure/devops/pipelines/process/expressions?view=azure-devops#functions

Video tutorial on YouTube: