Local runner: docker not found when running multiple steps or pipelines in parallel

Question

Hi,

on my local runner I face an issue when running either parallel pipeline steps (see image) or multiple pipelines in parallel. All steps but one that use docker end up returning bash: docker: command not found.

I was able to create a pipeline that reproduces the issue:

image: python:3.8.5-buster

clone:
  lfs: true

pipelines:
  custom:
    custom-debug-pipeline:
      - parallel:
        - step:
          runs-on: 
            - 'self.hosted'
            - 'linux.shell'
          clone:
            enabled: false
          script:
            - echo "$PATH"
            - docker container ls
            - docker image ls 
        - step:
          runs-on: 
            - 'self.hosted'
            - 'linux.shell'
          clone:
            enabled: false
          script:
            - echo "$PATH"
            - docker container ls
            - docker image ls

How can I solve this?

Hannes Kuchelmeister_60egy1 · Accepted Answer

I found the issue myself. I had two runners tagged like this but only the non-HIL runner had docker installed.

I fixed it by tagging the docker runner with an additional docker tag

and then updating all pipeline steps that require docker to be using:

runs-on: 
    - 'self.hosted' 
    - 'linux.shell' 
    - 'docker'