add functionality to mount existing configmap if needed

deploy/charts/litellm-helm/templates/configmap-litellm.yaml

@@ -1,7 +1,9 @@
+{{- if .Values.proxyConfigMap.create }}
 apiVersion: v1
 kind: ConfigMap
 metadata:
   name: {{ include "litellm.fullname" . }}-config
 data:
   config.yaml: |
-{{ .Values.proxy_config | toYaml | indent 6 }}
+{{ .Values.proxy_config | toYaml | indent 6 }}
+{{- end }}

deploy/charts/litellm-helm/templates/deployment.yaml

@@ -16,7 +16,9 @@ spec:
   template:
     metadata:
       annotations:
+        {{- if .Values.proxyConfigMap.create }}
         checksum/config: {{ include (print $.Template.BasePath "/configmap-litellm.yaml") . | sha256sum }}
+        {{- end }}
         {{- with .Values.podAnnotations }}
         {{- toYaml . | nindent 8 }}
         {{- end }}
@@ -183,9 +185,13 @@ spec:
         {{- end }}
         - name: litellm-config
           configMap:
+            {{- if .Values.proxyConfigMap.create }}
             name: {{ include "litellm.fullname" . }}-config
+            {{- else }}
+            name: {{ .Values.proxyConfigMap.name }}
+            {{- end }}
             items:
-              - key: "config.yaml"
+              - key: {{ .Values.proxyConfigMap.key | default "config.yaml" }}
                 path: "config.yaml"
       {{- with .Values.volumes }}
         {{- toYaml . | nindent 8 }}

deploy/charts/litellm-helm/values.yaml

@@ -93,6 +93,14 @@ masterkeySecretName: ""
 # if set, use this secret key for the master key; otherwise, use the default key
 masterkeySecretKey: ""
 
+proxyConfigMap:
+  # when true, creates a new configmap
+  create: true
+  # if create is false and name is set, use existing ConfigMap
+  # create: false
+  # name: ""
+  # key: "config.yaml"
+
 # The elements within proxy_config are rendered as config.yaml for the proxy
 #  Examples: https://github.com/BerriAI/litellm/tree/main/litellm/proxy/example_config_yaml
 #  Reference: https://docs.litellm.ai/docs/proxy/configs