Initial commit

.github/workflows/deploy-image.yml

@@ -0,0 +1,45 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    branches: ['main']
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -0,0 +1,8 @@
+FROM alpine:latest
+
+RUN apk add --update --no-cache python3 py3-aiohttp
+
+WORKDIR /app
+COPY truenas-gotify.py ./
+
+CMD ["/usr/bin/env", "python3", "truenas-gotify.py"]

truenas-gotify.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+import os
+import sys
+from aiohttp import web
+from aiohttp import ClientSession
+
+# The url the alerts should be forwarded to.
+# Format: http[s]://{host}:{port}/
+GOTIFY_BASEURL = os.environ.get("GOTIFY_URL")
+# The token for the gotify application
+# Example: cGVla2Fib29v
+GOTIFY_TOKEN = os.environ.get("GOTIFY_TOKEN")
+
+
+routes = web.RouteTableDef()
+
+# Listen to post requests on / and /message
+@routes.post("/")
+@routes.post("/message")
+async def on_message(request):
+    content = await request.json()
+    # The content of the alert message
+    message = content["text"]
+    print("===== Alert =====")
+    print(message)
+
+    # Forward the alert to gotify
+    gotify_resp = await send_gotify_message(message, GOTIFY_TOKEN)
+
+    # Return the gotify status code to truenas
+    return web.Response(status=gotify_resp.status)
+
+# Send an arbitrary alert to gotify
+async def send_gotify_message(message, token, title=None, priority=None):
+    # URL parameters
+    params = {"token": token}
+    # POST body
+    json = {"message": message}
+
+    # Optional gotify features
+    if title:
+        json["title"] = title
+    if priority:
+        json["priority"] = priority
+
+    async with ClientSession() as session:
+        async with session.post(GOTIFY_BASEURL, params=params, json=json) as resp:
+            return resp
+
+
+if __name__ == "__main__":
+    # Check if env variable is set
+    if GOTIFY_BASEURL == None:
+        sys.exit("Set Gotify Endpoint via 'GOTIFY_URL=http[s]://{host}:{port}/'!")
+    if GOTIFY_TOKEN == None:
+        sys.exit("Set Gotify App Token via 'GOTIFY_TOKEN={token}'!")
+
+    # Add /message to the url
+    if not "message" in GOTIFY_BASEURL:
+        if not GOTIFY_BASEURL[-1] == "/":
+            GOTIFY_BASEURL += "/"
+        GOTIFY_BASEURL += "message"
+
+
+    # Listen on default port
+    app = web.Application()
+    app.add_routes(routes)
+    web.run_app(app)