feat: rewrite MCP server in Go

.dockerignore

@@ -0,0 +1,60 @@
+# Git
+.git
+.gitignore
+.github/
+
+# Docker
+Dockerfile
+.dockerignore
+
+# Build artifacts
+bin/
+dist/
+build/
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Go specific
+vendor/
+go.work
+
+# Testing
+*_test.go
+**/test/
+**/tests/
+coverage.out
+coverage.html
+
+# IDE and editor files
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS specific
+.DS_Store
+Thumbs.db
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+*.log
+
+# Documentation
+docs/
+*.md
+LICENSE
+
+# Development tools
+.air.toml
+.golangci.yml
+.goreleaser.yml
+
+# Debug files
+debug
+__debug_bin

.github/workflows/go.yml

@@ -0,0 +1,52 @@
+name: Go
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24'
+          cache: true
+
+      - name: Lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.64
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # Start the Grafana server.
+      # Do this early so that it can start up in time for the tests to run.
+      # We may need to add a wait here.
+      - name: Start docker-compose services
+        uses: hoverkraft-tech/[email protected]
+        with:
+          compose-file: "docker-compose.yaml"
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24'
+          cache: true
+
+      - name: Wait for Grafana server and Prometheus server to start and scrape
+        run: sleep 30
+
+      - name: Run tests
+        run: make test-all

Dockerfile

@@ -1,28 +1,41 @@
-FROM python:3.13-slim AS builder
-COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
+# Build stage
+FROM golang:1.24-bullseye AS builder
 
-# Change the working directory to the `app` directory
+# Set the working directory
 WORKDIR /app
 
-# Install dependencies
-RUN --mount=type=cache,target=/root/.cache/uv \
-  --mount=type=bind,source=uv.lock,target=uv.lock \
-  --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
-  uv sync --frozen --no-install-project --no-editable
+# Copy go.mod and go.sum files
+COPY go.mod go.sum ./
 
-# Copy the project into the intermediate image
-ADD . /app
+# Download dependencies
+RUN go mod download
 
-# Sync the project
-RUN --mount=type=cache,target=/root/.cache/uv \
-  uv sync --frozen --no-editable
+# Copy the source code
+COPY . .
 
-FROM python:3.13-slim
+# Build the application
+RUN go build -o mcp-grafana ./cmd/mcp-grafana
 
-# Copy the environment, but not the source code
-COPY --from=builder --chown=app:app /app/.venv /app/.venv
+# Final stage
+FROM debian:bullseye-slim
 
+# Install ca-certificates for HTTPS requests
+RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+
+# Create a non-root user
+RUN useradd -r -u 1000 -m mcp-grafana
+
+# Set the working directory
+WORKDIR /app
+
+# Copy the binary from the builder stage
+COPY --from=builder --chown=1000:1000 /app/mcp-grafana /app/
+
+# Use the non-root user
+USER mcp-grafana
+
+# Expose the port the app runs on
 EXPOSE 8000
 
 # Run the application
-ENTRYPOINT ["/app/.venv/bin/mcp-grafana", "--transport", "sse"]
+ENTRYPOINT ["/app/mcp-grafana", "--transport", "sse", "--sse-address", "0.0.0.0:8000"]

Makefile

@@ -1,3 +1,18 @@
 .PHONY: build-image
 build-image:
-	docker build -t mcp-grafana:latest .
+	docker build -t mcp-grafana:latest .
+
+.PHONY: lint
+lint:
+	go tool -modfile go.tools.mod golangci-lint run
+
+.PHONY: test
+test:
+	go test ./...
+
+.PHONY: test-all
+test-all:
+	go test -v -tags integration ./...
+
+.PHONY: run
+	go run ./...