A workaround solution for ConfigMap recursive directory issues

configmap-recursive-directories-support.md

ConfigMap Recursive directory issues. https://stackoverflow.com/questions/48937323/automatic-subdirectories-in-kubernetes-configmaps

Using a Helm template

tree -L 2 helm_templates/your-template
helm_templates/your-template
├── Chart.yaml
├── templates
│   ├── NOTES.txt
│   ├── _helpers.tpl
│   ├── configmap.yaml  <--- ConfigMap
│   ├── deployment.yaml <--- Deployment
└── values.yaml

Load recursive directories from config_dir

     def _get_config_maps(self) -> dict:
         config_maps = {}
         filenames = [y for x in os.walk(self.config_dir) for y in glob.glob(os.path.join(x[0], '*')) if os.path.isfile(y)]
 
         for filename in filenames:
             # remove parent dir path
             relative_path = filename.replace(self.config_dir + os.path.sep, "")
             # replace path separator by "__" to prevent Kubernetes syntax error
             # currently file path doesn't validate '[-._a-zA-Z0-9]+'
             key = relative_path.replace(os.path.sep, "__")
             with open(filename, 'r') as file:
                 config_maps[key] = {
                     "path": relative_path,
                     "content": file.read()
                 }
         return config_maps

Save to values.yaml

      # load value template
        with open('helm_templates/your-template/values.yaml', 'r') as file:
            deploy_values = yaml.safe_load(file)
            deploy_values['configMaps'] = self._get_config_maps()

ConfigMap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ template "your-template.fullname" . }}-config
data:
{{- range $key, $value := .Values.configMaps }}
  {{ $key }}: |-
{{ $value.content | indent 4 }}
{{- end }}

Deployment.yaml Mount all configMap data to volume using subPath

spec:
      volumes:
        - name: {{ template "your-template.fullname" . }}-config
          configMap: { name: {{ template "your-template.fullname" . }}-config }
      containers:
        - volumeMounts:
            {{- range $key, $value := .Values.configMaps }}
            - name: {{ template "your-template.fullname" $ }}-config
              mountPath: /config/{{ $value.path }}
              subPath: {{ $key }}
            {{- end }}