Helm - allow loading all river files in a folder

Author: fculpo

operations/helm/charts/grafana-agent/CHANGELOG.md

@@ -10,6 +10,10 @@ internal API changes are not present.
 Unreleased
 ----------
 
+### Features
+
+- Agent can load all river files located in `/etc/agent` (mounted via default or user provided configMap) instead of only one. This allows increased modularity, besides modules, and a terraform like behaviour. To enable it, set `.Values.agent.configMap.loadFolder` to `true`. (@fculpo)
+
 0.35.0 (2024-02-27)
 -------------------
 

operations/helm/charts/grafana-agent/templates/containers/_agent.yaml

@@ -3,9 +3,13 @@
   image: {{ .Values.global.image.registry | default .Values.image.registry }}/{{ .Values.image.repository }}{{ include "grafana-agent.imageId" . }}
   imagePullPolicy: {{ .Values.image.pullPolicy }}
   args:
-    {{- if eq .Values.agent.mode "flow"}}
+    {{- if eq .Values.agent.mode "flow" }}
     - run
+    {{- if .Values.agent.configMap.loadFolder }}
+    - /etc/agent/
+    {{- else }}
     - /etc/agent/{{ include "grafana-agent.config-map.key" . }}
+    {{- end }}
     - --storage.path={{ .Values.agent.storagePath }}
     - --server.http.listen-addr={{ .Values.agent.listenAddr }}:{{ .Values.agent.listenPort }}
     - --server.http.ui-path-prefix={{ .Values.agent.uiPathPrefix }}

operations/helm/charts/grafana-agent/values.yaml

@@ -34,8 +34,12 @@ agent:
 
     # -- Name of existing ConfigMap to use. Used when create is false.
     name: null
-    # -- Key in ConfigMap to get config from.
+    # -- Key in ConfigMap to get config from. 
+    # Ignored if loadFolder is true.
     key: null
+    # -- If true, agent will load all files in /etc/agent (mounted via the configMap).
+    # key will be ignored
+    loadFolder: false
 
   clustering:
     # -- Deploy agents in a cluster to allow for load distribution. Only