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output-parameter.yaml
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output-parameter.yaml
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# Output parameters provide a way to use the contents of a file,
# as a parameter value in a workflow. In that regard, they are
# similar in concept to script templates, with the difference being
# that the output parameter values are obtained via file contents
# instead of stdout (as with script templates). Secondly, there can
# be multiple 'output.parameters.xxx' in a single template, versus
# a single 'output.result' from a script template.
#
# In this example, the 'whalesay' template produces an output
# parameter named 'hello-param', taken from the file contents of
# /tmp/hello_world.txt. This parameter is passed to a subsequent
# step as an input parameter to the template, 'print-message'.
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
generateName: output-parameter-
spec:
entrypoint: output-parameter
templates:
- name: output-parameter
steps:
- - name: generate-parameter
template: whalesay
- - name: consume-parameter
template: print-message
arguments:
parameters:
- name: message
value: "{{steps.generate-parameter.outputs.parameters.hello-param}}"
- name: whalesay
container:
image: docker/whalesay:latest
command: [sh, -c]
args: ["sleep 1; echo -n hello world > /tmp/hello_world.txt"]
outputs:
parameters:
- name: hello-param
valueFrom:
path: /tmp/hello_world.txt
- name: print-message
inputs:
parameters:
- name: message
container:
image: docker/whalesay:latest
command: [cowsay]
args: ["{{inputs.parameters.message}}"]