How to pass paramters to argo workflow api - argo-workflows

Question

I am running my workflow through argo workflow api ,and I am not able to pass dynamic input paramters
curl -k --request POST \
--url https://localhost:2746/api/v1/workflows/argo \
--header 'content-type: application/json' \
--data '{
"namespace": "argo",
"serverDryRun": false,
"workflow": {
"metadata": {
"generateName": "hello-world-",
"namespace": "argo",
"labels": {
"workflows.argoproj.io/completed": "false"
}
},
"spec": {
"templates": [
{
"name": "whalesay",
"arguments": {},
"inputs": {
"parameters":{
"name":"sh#yahoo.com"
}
},
"outputs": {},
"metadata": {},
"container": {
"name": "",
"image": "gandalf/patientreg",
"command": [
"./app"
],
"args": [
""
],
"resources": {}
}
}
],
"entrypoint": "whalesay",
"arguments": {}
}
}
}'
I am getting this error while running the workflow
{"code":3,"message":"json: cannot unmarshal object into Go struct
field Inputs.workflow.spec.templates.inputs.parameters of type
[]v1alpha1.Parameter"}%
I want to pass dynamic email through api and receive if as command line arguments in my app such that I can run my workflow .
How to achieve that ?

Answer 1

You can pass parameters to the workflow which instead can be sent to any step inside the workflow. The parameter should have a name. In your example you are only passing the value directly to the step.
Here is an example payload.
{
"workflow": {
"metadata": {
"name": "awesome-dragon",
"namespace": "argo",
"labels": {
"example": "true"
}
},
"spec": {
"arguments": {
"parameters": [
{
"name": "workflow-arg",
"value": "mail.from#outside.code"
}
]
},
"entrypoint": "argosay",
"templates": [
{
"name": "argosay",
"inputs": {
"parameters": [
{
"name": "step-level-arg",
"value": "{{workflow.parameters.workflow-arg}}"
}
]
},
"container": {
"name": "main",
"image": "argoproj/argosay:v2",
"command": [
"/argosay"
],
"args": [
"echo",
"{{inputs.parameters.step-level-arg}}"
]
}
}
],
"ttlStrategy": {
"secondsAfterCompletion": 300
},
"podGC": {
"strategy": "OnPodCompletion"
}
}
}
}
Note that an named argument is passed from outside to the argo workflow. The same workflow argument can be utilized any template inside.