How to map with local mappings and response files

[aleproust]

Summary

Hello,
I've been using your chart and I was trying to use files on my local to configure the mappings and response.

I tried to go with volumes

volumes:
  - name: mappings-data
    hostPath:
      path: /data/mappings
  - name: responses-data
    hostPath:
      path: /data/responses
volumeMounts:
  - name: mappings-data
    mountPath: /home/wiremock/mappings
  - name: responses-data
    mountPath: /home/wiremock/__files

or with a command line with --set-file mappings.custom.mapping.json=./mappings/custom_mapping.json

But I'm facing error. Is there any documentation on how to do this?

Thanks

References

No response

[gitkent]

@aleproust if your mappings and responses files are on your local, please utilise out of the box mappings and responses folders.

Thanks

[aleproust]

I'm deploying on a kubernetes cluster with the command:

helm upgrade --install wiremock wiremock/wiremock -n mock

I wanted to use local files to use them directly into the cluster

Here is my setup of local custom responses:

I tried different approach:

1. Using a command line to override the values file
   helm upgrade --install wiremock wiremock/wiremock -n mock --set-file mappings.custom_mapping.json=./mappings/custom_mapping.json --set-file responses.custom_responses.json=./responses/custom_response.json

But I get an error
json: cannot unmarshal object into Go struct field ConfigMap.data of type string

2. Volume approach
   helm upgrade --install wiremock wiremock/wiremock --debug -n mock --values values.yaml

But no file are mounted in the containers.

I wanted to avoid clone this repository

[DanielFran]

@aleproust I never found a good way to do it, you cannot use external directories...

The only solution I found so far is:

• helm pull wiremock --repo https://wiremock.github.io/helm-charts --version 1.5.1 --untar;
• rm -rf ./wiremock/mappings/* && cp ./local-mappings/*.json ./wiremock/mappings
• rm -rf ./wiremock/responses/* && cp ./local-responses/*.json ./wiremock/responses
• rm -rf wiremock-1.5.1.tgz
• helm package ./wiremock
• helm upgrade --install wiremock ./wiremock-1.5.1.tgz --debug -n mock --values values.yaml

@gitkent I am open to other suggestions...

[WesselAtWork]

You've stumbled on one of helm's oldest idiosyncrasies

helm/helm#3276

It is buried in their docs

Files outside of a Helm application subchart, including those of the parent, cannot be accessed

Basically you can't add to the mappings directory and the responses directory from your workspace.

---

@aleproust
Your invocation of --set-file is wrong.

--set-file=VALUE_PATH=FS_PATH
so that means your: mappings.custom.mapping.json is doing this:

mappings:
  custom:  
    mapping:
      json: "<YOUR JSON>"

what you want is:
--set-file="mappings.custom_mapping\.json=mappings/custom_mapping.json"
NOTE: the \. to escape the .

which will result in:

mappings:
  mapping.json: "<YOUR JSON>"

Which is what you want.

Try it yourself:
example.json

{"hello":"world"}

helm template wiremock wiremock/wiremock --set-file 'mappings.myfile\.json=example.json' --debug --dry-run > generated.yaml

in generated.yaml you should see:

---
# Source: wiremock/templates/configmap-mappings.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: wiremock-mappings-configs
  labels:
    helm.sh/chart: wiremock-1.7.0
    app.kubernetes.io/name: wiremock
    app.kubernetes.io/instance: wiremock
    app.kubernetes.io/version: "3.10.0"
    app.kubernetes.io/managed-by: Helm
data: 
  mapping_1.json: "{\n  \"request\": {\n      \"method\": \"POST\",\n      \"url\": \"/v1/hello\"\n  },\n  \"response\":{\n    \"status\":200,\n    \"bodyFileName\":\"responses/response_1.json\",\n    \"headers\":{\n       \"Content-Type\":\"application/json\"\n    }\n }\n}" 
  myfile.json: '{"hello":"world"}'
---

---

@DanielFran
you can use:
$(cd local-mappings; printf -v fmt ' --set-file=mappings.%s=local-mappings/%%s' $(echo *.json | sed 's!\.!\\\.!g'); printf "$fmt" *.json)
$(cd local-responses; printf -v fmt ' --set-file=responses.%s=local-responses/%%s' $(echo *.json | sed 's!\.!\\\.!g'); printf "$fmt" *.json)

If you want to generate the set-file commands for a bare helm upgrade