docs and example, addtional env vars

Author: fabricebrito

README.md

@@ -4,10 +4,98 @@ Zoo runner using Argo Workflows
 
 ## Environment variables
 
-- `STORAGE_CLASS`: standard
-- `DEFAULT_VOLUME_SIZE` 12Gi
-- `DEFAULT_MAX_CORES`: 4
-- `DEFAULT_MAX_RAM`: 4Gi
-- `ARGO_WF_ENDPOINT`: "http://localhost:2746"
-- `ARGO_WF_TOKEN`: `kubectl get -n ns1 secret argo.service-account-token -o=jsonpath='{.data.token}' | base64 --decode`
-- `ARGO_WF_SYNCHRONIZATION_CM`: "semaphore-water-bodies"
+- `STORAGE_CLASS`: k8s cluster RWX storage class, defaults to `standard`.
+- `DEFAULT_VOLUME_SIZE`: Calrissian default RWX volume size, defaults to `12Gi`.
+- `DEFAULT_MAX_CORES`: Calrissian default max cores, defaults to `4`.
+- `DEFAULT_MAX_RAM`: Calrissian default max RAM, defaults to `4Gi`.
+- `ARGO_WF_ENDPOINT`: this is the Argo Workflows API endpoint, defaults to `"http://localhost:2746"`.
+- `ARGO_WF_TOKEN`: this is the Argo Workflows API token that can be retrieved with: `kubectl get -n ns1 secret argo.service-account-token -o=jsonpath='{.data.token}' | base64 --decode`
+- `ARGO_WF_SYNCHRONIZATION_CM`: this is the Argo Workflows synchronizaion configmap (with key "workflow"). For tests, we use "semaphore-argo-cwl-runner"
+- `ARGO_CWL_RUNNER_TEMPLATE`: this is the Argo Workflows WorkflowTemplate that runs the CWL, defaults to: "argo-cwl-runner"
+- `ARGO_CWL_RUNNER_ENTRYPOINT`: this is the Argo Workflows WorkflowTemplate entrypoint, defaults to: "calrissian-runner"
+
+## Requirements
+
+The Argo Workflows deployment has a Argo Workflows `WorkflowTemplate` or `ClusterWorkflowTemplate` impllementing the execution of a Calrissian Job and exposing the interface:
+
+**Input parameters:** 
+
+```yaml
+    templates:
+    - name: calrissian-runner
+      inputs:
+        parameters:
+          - name: parameters
+            description: Parameters in JSON format
+          - name: cwl
+            description: CWL document in JSON format
+          - name: max_ram
+            default: 8G
+            description: Max RAM (e.g. 8G)
+          - name: max_cores
+            default: '4'
+            description: Max cores (e.g. 4)
+          - name: entry_point
+            description: CWL document entry_point
+```
+
+**Outputs:**
+
+```yaml
+    outputs:
+        parameters:
+          - name: results
+            valueFrom:
+              parameter: '{{steps.get-results.outputs.parameters.calrissian-output}}'
+          - name: log
+            valueFrom:
+              parameter: '{{steps.get-results.outputs.parameters.calrissian-stderr}}'
+          - name: usage-report
+            valueFrom:
+              parameter: '{{steps.get-results.outputs.parameters.calrissian-report}}'
+          - name: stac-catalog
+            valueFrom:
+              parameter: '{{steps.stage-out.outputs.parameters.stac-catalog}}'
+          - name: feature-collection
+            valueFrom:
+              parameter: >-
+                {{steps.feature-collection.outputs.parameters.feature-collection}}
+        artifacts:
+          - name: tool-logs
+            from: '{{steps.get-results.outputs.artifacts.tool-logs}}'
+          - name: calrissian-output
+            from: '{{steps.get-results.outputs.artifacts.calrissian-output}}'
+          - name: calrissian-stderr
+            from: '{{steps.get-results.outputs.artifacts.calrissian-stderr}}'
+          - name: calrissian-report
+            from: '{{steps.get-results.outputs.artifacts.calrissian-report}}'
+```
+
+Where: 
+
+- `results` is the Calrissian job stdout
+- `log` is the Calrissian job stderr
+- `usage-report` is the Calrissian usage report
+- `stac-catalog` is the s3 path to the published STAC Catalog
+- `feature-collection` is the Feature Collection with the STAC Items produced
+
+And the artifacts:
+
+- `tool-logs` is the Calrissian CWL step logs defined as:
+
+
+```yaml
+        artifacts:
+          - name: tool-logs
+            path: /calrissian/logs
+            s3:
+              key: '{{workflow.name}}-{{workflow.uid}}-artifacts/tool-logs'
+            archive:
+              none: {}
+```
+
+- `calrissian-output` is the Calrissian stdout
+- `calrissian-stderr` is the Calrissian job stderr
+- `calrissian-report` is the Calrissian usage report
+
+See the example provided in folder `example`