Using timezone in tasks

To use timezone in concourse tasks, 2 conditions must be met:

• The image used by the concourse task must be timezone-aware
• The TZ env variable must be set

This is a sample dockerfile for a Ubuntu-based image with timezone awareness:

# oozie/los_angeles
FROM ubuntu
ENV TZ=America/Los_Angeles
RUN apt update && apt install -y tzdata

The following pipeline embeds a task that results in a timezoned output from the date command. The first invocation will display date and time in PST format while the subsequent invocation will produce date and time in UTC.

jobs:
  - name: timezoned-task
    plan:
    - task: tz-aware
      config:
        platform: linux
        image_resource:
          type: docker-image
          source:
            repository: oozie/los_angeles
        run:
          path: /bin/bash
          args:
          - -c
          - |
            date
            TZ=UTC date