Empty Dir¶
Not all workflow executors can get output artifacts/parameters from the base layer (e.g. /tmp
).
It is unlikely you can get output artifacts/parameters from the base layer if you run your workflow pods with a security context.
You can work-around this constraint by mounting volumes onto your pod. The easiest way to do this is to use as emptyDir
volume.
Note
This is only needed for output artifacts/parameters. Input artifacts/parameters are automatically mounted to an empty-dir if needed
This example shows how to mount an output volume:
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
generateName: empty-dir-
spec:
entrypoint: main
templates:
- name: main
container:
image: argoproj/argosay:v2
command: [sh, -c]
args: ["cowsay hello world | tee /mnt/out/hello_world.txt"]
volumeMounts:
- name: out
mountPath: /mnt/out
volumes:
- name: out
emptyDir: { }
outputs:
parameters:
- name: message
valueFrom:
path: /mnt/out/hello_world.txt