feat: add plugin downloader to helm

Adds the ability to specify a path to download your aether plugins from

Signed-off-by: Spazzy <brendankamp757@gmail.com>

charts/aether/Chart.yaml

@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.0
+version: 0.1.1
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/aether/templates/deployment.yaml

@@ -36,6 +36,51 @@ spec:
           configMap:
             defaultMode: 420
             name: {{ include "aether.fullname" . }}
+        {{- if .Values.plugins.exporters }}
+        - name: exporters
+          emptyDir: {}
+        {{- end }}
+        {{- if .Values.plugins.sources }}
+        - name: sources
+          emptyDir: {}
+        {{- end }}
+      initContainers:
+      {{- if .Values.plugins.exporters }}
+      - name: download-exporters
+        image: "{{ .Values.plugins.image.repository }}:{{ .Values.plugins.image.tag }}"
+        command:
+        - sh
+        - -c
+        args:
+        - echo Downloading Exporters;
+          {{- range .Values.plugins.exporters }}
+          echo Fetching "{{ .link }}";
+          wget "{{ .link }}" -O /exporters/{{ .name }};
+          chmod 755 /exporters/{{ .name }};
+          {{- end }}
+          echo Finished downloading;
+        volumeMounts:
+        - mountPath: /exporters
+          name: exporters
+      {{- end }}
+      {{- if .Values.plugins.sources }}
+      - name: download-sources
+        image: "{{ .Values.plugins.image.repository }}:{{ .Values.plugins.image.tag }}"
+        command:
+        - sh
+        - -c
+        args:
+        - echo Downloading Sources;
+          {{- range .Values.plugins.exporters }}
+          echo Fetching "{{ .link }}";
+          wget "{{ .link }}" -O /sources/{{ .name }};
+          chmod 755 /exporters/{{ .name }};
+          {{- end }}
+          echo Finished downloading;
+        volumeMounts:
+        - mountPath: /sources
+          name: sources
+      {{- end }}
       containers:
         - name: {{ .Chart.Name }}
           securityContext:
@@ -49,13 +94,22 @@ spec:
           env:
           - name: AETHER_CONFIG
             value: local
+            {{- toYaml .Values.env | nindent 10 }}
           volumeMounts:
             - mountPath: /conf
               name: config
             {{- if .Values.secretName }}
             - name: credentials
               mountPath: /etc/secrets
             {{- end }}
+            {{- if .Values.plugins.exporters }}
+            - mountPath: /plugins/exporters 
+              name: exporters
+            {{- end }}
+            {{- if .Values.plugins.sources }}
+            - mountPath: /plugins/sources
+              name: sources
+            {{- end }}
           livenessProbe:
             httpGet:
               path: /healthz

charts/aether/values.yaml

@@ -16,6 +16,34 @@ secretName: ""
 
 config: {}
 
+# some plugins need extra environment variables
+# you can set them here
+# example
+# env:
+# - name: EXAMPLE_ENV
+#   value: foobar
+env: []
+
+# plugin configuration
+plugins:
+  # image used to download the binaries
+  # requires wget
+  image:
+    repository: alpine
+    pullPolicy: IfNotPresent
+    tag: "3.15" 
+
+  # a list of links that get plugins from
+  # example:
+  # exporters:
+  # - link: https://example.com/example
+  #   name: example
+  # sources:
+  # - link: https://example.com/example
+  #   name: example
+  exporters: []
+  sources: []
+
 imagePullSecrets: []
 nameOverride: ""
 fullnameOverride: ""