Support downloading integrations by URL (#2)

Closes #2

Author: SIMULATAN

backend/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: backend
-version: 0.3.0
+version: 0.4.0
 description: Backend of the Snoty application suite
 type: application
 home: https://snoty.me

backend/templates/deployment.yaml

@@ -17,10 +17,26 @@ spec:
       labels: {{- include "common.labels.standard" ( dict "customLabels" $podLabels "context" $ ) | nindent 8 }}
       annotations:
         snoty.me/checksum-config: {{ include "snoty.config" . | sha256sum }}
+        snoty.me/checksum-scripts: {{ include (print $.Template.BasePath "/scripts-configmap.yaml") . | sha256sum }}
+
         {{- if .Values.podAnnotations }}
         {{- include "common.tplvalues.render" (dict "value" .Values.podAnnotations "context" $) | nindent 8 }}
         {{- end }}
     spec:
+      initContainers:
+      {{- if .Values.download.integrations }}
+      - name: download-integrations
+        image: alpine:3.20
+        volumeMounts:
+          - name: scripts
+            mountPath: /scripts
+          - name: integrations
+            mountPath: /integrations
+        command:
+        - sh
+        - -c
+        - "cd /scripts && ./download-integrations.sh"
+      {{- end }}
       containers:
       - name: {{ include "common.names.fullname" . }}
         image: {{ template "snoty.image" . }}
@@ -48,6 +64,8 @@ spec:
           - mountPath: /app/application.yml
             name: app-config
             subPath: application.yml
+          - name: integrations
+            mountPath: /integrations
         {{- if .Values.customStartupProbe }}
         startupProbe: {{- include "common.tplvalues.render" (dict "value" .Values.customStartupProbe "context" $) | nindent 12 }}
         {{- else if .Values.startupProbe.enabled }}
@@ -91,5 +109,9 @@ spec:
         - name: app-config
           configMap:
             name: {{ include "common.names.fullname" . }}
-
-
+        - name: scripts
+          configMap:
+            name: {{ printf "%s-scripts" (include "common.names.fullname" .) }}
+            defaultMode: 0755
+        - name: integrations
+          emptyDir:

backend/templates/scripts-configmap.yaml

@@ -0,0 +1,31 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "common.names.fullname" . }}-scripts
+  namespace: {{ .Release.Namespace | quote }}
+  labels: {{- include "common.labels.standard" ( dict "customLabels" .Values.commonLabels "context" $ ) | nindent 4 }}
+  {{- if .Values.commonAnnotations }}
+  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
+  {{- end }}
+data:
+  integrations.json: {{ toJson .Values.download.integrations | quote }}
+  download-integrations.sh: |-
+    echo "Installing jq..."
+    apk add --no-cache jq
+    echo "Finished installing jq!"
+    echo "Downloading integrations..."
+    echo "Raw input: $(cat integrations.json)"
+    # wget every integration
+    jq -r '.[]' integrations.json | while read -r integration; do
+      echo "Downloading $integration..."
+      # integrations are picked up in /integrations by JIB
+      if wget "$integration" -P /integrations; then
+        echo "Finished downloading $integration!"
+      else
+        echo "Error downloading $integration!"
+        if {{ .Values.download.errorOnDownloadFail }}; then
+          echo "[debug] errorOnDownloadFail is set to true, exiting..."
+          exit 1
+        fi
+      fi
+    done

backend/values.yaml

@@ -129,6 +129,12 @@ extraAppConfig: {}
 
 extraEnvVars: []
 
+download:
+  ## @param download.errorOnDownloadFail whether to fail when any integration fails to download
+  errorOnDownloadFail: true
+  ## @param download.integrations a list of integrations (HTTP(s) URLs) to download and start snoty with
+  integrations: []
+
 ## ref: https://kubernetes.io/docs/concepts/services-networking/ingress/
 ##
 ingress:
@@ -241,6 +247,8 @@ mongodb:
     rootPassword: changeme
   architecture: standalone
   service:
+    # you may want to change this to `releasename-mongodb`
+    # TODO: figure out what happened here
     nameOverride: snoty-mongodb
   # --- HA ---
   # architecture: replicaset