How to run a docker container in Azure pipeline?
Aug 25
Azure documentation (https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/build/docker?view=azure-devops) does not specify how to run a docker container in Azure pipeline. We can use the Docker@2 task to build / push docker images but it does not have a command to run a container. By looking at source code of older versions of Docker task I can see there has been a run command, but those are now deprecated and there is no documentation to be found.
I also followed the doc: https://learn.microsoft.com/en-us/azure/devops/pipelines/process/container-phases?view=azure-devops
With following yaml I was able to pull a docker image which was previously pushed to ACR.
(my-acr is a service connection I added via project settings)
pool:
vmImage: 'ubuntu-16.04'
container:
image: somerepo/rnd-hello:latest
endpoint: my-acr
steps:
- script: printenv
But I cannot get the container to run.
docker
azure1 answer
Accepted answer · original discussion
Aug 29
Apparently the configuration mentioned in the question will pull the image and run the step (in this case printenv command in the script) inside the container. A temporary working directory will be mounted automatically and it will run inside that dir.
However this will not run the container itself. (CMD command defined in the Dockerfile will not be executed)
In order to run the container itself we have to login to docker registry with Docker@2 inbuilt task and then manually execute the docker run as a script. Here is an example,
trigger: none
jobs:
- job: RunTest
workspace:
clean: all
pool:
vmImage: 'ubuntu-latest'
steps:
- task: Docker@2
displayName: Login to ACR
inputs:
command: login
containerRegistry: my-acr
- script: |
docker run my-registry.azurecr.io/somerepo/rnd-hello:latest
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