From 45db97b7a59e4ec39ba9360ad37ac8dfb288a7e6 Mon Sep 17 00:00:00 2001
From: Robbie Blaine <4052340+rblaine95@users.noreply.github.com>
Date: Fri, 17 Jan 2025 13:34:30 +0200
Subject: [PATCH] Prometheus Exporter (#33)

* Dedicated exporter image
* Pin exporter to git hash
* Add exporter to compose
---
 .github/workflows/docker.yml | 122 +++++++++++++++++++++++++++++++----
 Dockerfile.prom-exporter     |  18 ++++++
 docker-compose.yml           |  16 +++++
 3 files changed, 142 insertions(+), 14 deletions(-)
 create mode 100644 Dockerfile.prom-exporter

diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index c768af6..c009b71 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -3,12 +3,27 @@ name: Docker
 on: [workflow_dispatch, push]
 
 env:
-  IMAGE_NAME: monero
+  MONERO_IMAGE_NAME: monero
+  EXPORTER_IMAGE_NAME: monero-exporter
   PLATFORMS: linux/amd64,linux/arm64/v8,linux/arm/v7
 
 jobs:
-  build:
-    name: Build
+  check-changes:
+    name: Check Changes (Exporter)
+    runs-on: ubuntu-latest
+    outputs:
+      exporter_changed: ${{ steps.changes.outputs.exporter }}
+    steps:
+      - uses: actions/checkout@v4
+      - id: changes
+        uses: dorny/paths-filter@v3
+        with:
+          filters: |
+            exporter:
+              - 'Dockerfile.prom-exporter'
+
+  build-monero:
+    name: Build Monero
     runs-on: ${{ matrix.runs-on }}
     strategy:
       matrix:
@@ -18,11 +33,42 @@ jobs:
             runs-on: ubuntu-latest
             platform: linux/amd64
           - arch: arm64
-            # https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/
             runs-on: ubuntu-24.04-arm
             platform: linux/arm64
           - arch: armv7
+            runs-on: ubuntu-24.04-arm
+            platform: linux/arm/v7
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/build-push-action@v6
+        with:
+          platforms: ${{ matrix.platform }}
+          push: false
+          cache-from: |
+            type=gha,scope=monero-build-${{ matrix.arch }}
+          cache-to: |
+            type=gha,mode=max,scope=monero-build-${{ matrix.arch }}
+          context: .
+
+  build-exporter:
+    name: Build Exporter
+    needs: [check-changes]
+    if: needs.check-changes.outputs.exporter_changed == 'true'
+    runs-on: ${{ matrix.runs-on }}
+    strategy:
+      matrix:
+        arch: [amd64, arm64, armv7]
+        include:
+          - arch: amd64
             runs-on: ubuntu-latest
+            platform: linux/amd64
+          - arch: arm64
+            runs-on: ubuntu-24.04-arm
+            platform: linux/arm64
+          - arch: armv7
+            runs-on: ubuntu-24.04-arm
             platform: linux/arm/v7
     steps:
       - uses: actions/checkout@v4
@@ -32,14 +78,16 @@ jobs:
         with:
           platforms: ${{ matrix.platform }}
           push: false
+          file: Dockerfile.prom-exporter
           cache-from: |
-            type=gha,scope=docker-build-${{ matrix.arch }}
+            type=gha,scope=exporter-build-${{ matrix.arch }}
           cache-to: |
-            type=gha,mode=max,scope=docker-build-${{ matrix.arch }}
+            type=gha,mode=max,scope=exporter-build-${{ matrix.arch }}
           context: .
-  combine:
-    name: Combine
-    needs: [build]
+
+  combine-monero:
+    name: Combine Monero
+    needs: [build-monero]
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -74,9 +122,55 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: |
-            type=gha,scope=docker-package
-            type=gha,scope=docker-build-amd64
-            type=gha,scope=docker-build-arm64
-            type=gha,scope=docker-build-armv7
+            type=gha,scope=monero-package
+            type=gha,scope=monero-build-amd64
+            type=gha,scope=monero-build-arm64
+            type=gha,scope=monero-build-armv7
+          cache-to: |
+            type=gha,mode=max,scope=monero-package
+
+  combine-exporter:
+    name: Combine Exporter
+    needs: [check-changes, build-exporter]
+    if: needs.check-changes.outputs.exporter_changed == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ github.token }}
+      - uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+      - uses: docker/metadata-action@v5
+        id: meta
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}/monero-exporter
+            docker.io/rblaine/monero-exporter
+          tags: |
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
+            type=raw,value={{branch}},enable=${{ github.ref != format('refs/heads/{0}', 'master') }}
+            type=ref,event=tag
+      - uses: docker/build-push-action@v6
+        with:
+          platforms: ${{ env.PLATFORMS }}
+          push: true
+          file: Dockerfile.prom-exporter
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: |
+            type=gha,scope=exporter-package
+            type=gha,scope=exporter-build-amd64
+            type=gha,scope=exporter-build-arm64
+            type=gha,scope=exporter-build-armv7
           cache-to: |
-            type=gha,mode=max,scope=docker-package
+            type=gha,mode=max,scope=exporter-package
diff --git a/Dockerfile.prom-exporter b/Dockerfile.prom-exporter
new file mode 100644
index 0000000..f5e5dd5
--- /dev/null
+++ b/Dockerfile.prom-exporter
@@ -0,0 +1,18 @@
+##################
+# -- exporter -- #
+##################
+FROM docker.io/golang:1.23-alpine AS exporter
+
+RUN GO111MODULE=on go install github.com/cirocosta/monero-exporter/cmd/monero-exporter@cf21000
+
+##################
+# -- runner -- #
+##################
+FROM docker.io/alpine:3 AS runner
+
+COPY --from=exporter /go/bin/monero-exporter /usr/local/bin/monero-exporter
+
+EXPOSE 9000
+
+ENTRYPOINT ["/usr/local/bin/monero-exporter"]
+CMD ["--bind-addr", ":9000", "--monero-addr", "http://127.0.0.1:18081", "--telemetry-path", "/metrics"]
diff --git a/docker-compose.yml b/docker-compose.yml
index eb72f91..1d9ffb9 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -82,6 +82,22 @@ services:
       - --add-peer=plowsoffjexmxalw73tkjmf422gq6575fc7vicuu4javzn2ynnte6tyd.onion:18083
       - --add-peer=qz43zul2x56jexzoqgkx2trzwcfnr6l3hbtfcfx54g4r3eahy3bssjyd.onion:18083
 
+  monero-exporter:
+    container_name: monero-exporter
+    image: ghcr.io/rblaine95/monero-exporter
+    restart: unless-stopped
+    network_mode: host
+    depends_on:
+      monerod:
+        condition: service_healthy
+    command:
+      - --bind-addr
+      - :9000
+      - --monero-addr
+      - http://127.0.0.1:18081
+      - --telemetry-path
+      - /metrics
+
   prep-tor-data:
     container_name: prep-volume
     image: alpine