Use OpenShift secrets

Access OpenShift.

Argo project > Resources > Secret

Secret Type: Generic Secret
Secret Name: d2s-sparql-password
Key: password
Enter the password in the text box Clean Value

- name: d2s-sparql-operations
  inputs:
    parameters:
    - name: sparql-queries-path
    - name: sparql-input-graph
    - name: sparql-output-graph
    - name: sparql-service-url
    - name: sparql-triplestore-url
    - name: sparql-triplestore-repository
    - name: sparql-triplestore-username
  container:
    image: umids/d2s-sparql-operations:latest
    args: ["-ep", "{{inputs.parameters.sparql-triplestore-url}}", 
      "-rep", "{{inputs.parameters.sparql-triplestore-repository}}", 
      "-op", "update", "-f", "{{inputs.parameters.sparql-queries-path}}",
      "-un", "{{inputs.parameters.sparql-triplestore-username}}", 
      "-pw", "{{inputs.parameters.sparql-triplestore-password}}",
      "-pw", "$SPARQLPASSWORD",  # secret from env
      "--var-input", "{{inputs.parameters.sparql-input-graph}}",
      "--var-output", "{{inputs.parameters.sparql-output-graph}}", 
      "--var-service", "{{inputs.parameters.sparql-service-url}}", ]
    env:
    - name: SPARQLPASSWORD
      valueFrom:
        secretKeyRef:
          name: d2s-sparql-password
          key: password

Now you can use the secret as environment variable in the workflow definition.