Add Dockerfile and Compose Setup for Helios #39
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Summary of ChangesHello @Utkarsh9571, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly enhances the deployability and ease of use for the Helios application by introducing comprehensive Docker support. It provides a multi-stage Dockerfile for efficient image creation and a Highlights
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Code Review
This pull request introduces Dockerization for the Helios project, including a multi-stage Dockerfile and a docker-compose.yaml file. It also updates the helios.yaml configuration to use Docker service names for backend routing. The changes are well-structured and address the stated goals of the PR. The Dockerfile uses a multi-stage build for efficiency, and the docker-compose.yaml sets up Helios with three Nginx backend services, which is a good starting point for local development and testing. The helios.yaml updates correctly reflect the new service-based addressing. Overall, the changes are good, but there are a few areas for improvement regarding Docker best practices and configuration clarity.
Dockerfile
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| WORKDIR /app | ||
| COPY go.mod go.sum ./ | ||
| RUN go mod download | ||
| COPY . . |
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Copying the entire current directory (COPY . .) in the build stage can lead to larger-than-necessary build contexts and images, especially if there are many unrelated files in the root directory. It's better to explicitly copy only the necessary files and directories.
COPY cmd/helios/ ./cmd/helios/
COPY internal/ ./internal/
COPY go.mod go.sum ./
Dockerfile
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| RUN go build -o helios ./cmd/helios | ||
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| # Stage 2: Runtime | ||
| FROM alpine:latest |
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Using alpine:latest for the runtime image is generally acceptable for small images, but it's often better to pin to a specific version (e.g., alpine:3.18) to ensure reproducibility and prevent unexpected changes when the latest tag is updated.
FROM alpine:3.18
docker-compose.yaml
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| - ./helios.yaml:/app/helios.yaml | ||
| - ./certs:/app/certs |
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Mounting the certs/ directory directly from the host into the container is convenient for development but might not be ideal for production environments. For production, consider using Docker secrets or a more secure method for managing TLS certificates.
- ./certs:/app/certs:ro| depends_on: | ||
| - backend1 | ||
| - backend2 | ||
| - backend3 |
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The depends_on directive in Docker Compose only ensures the startup order of services, but it does not wait for the services to be 'ready' (e.g., Nginx fully started and listening). For more robust dependency management, consider using wait-for-it.sh or a similar health-check based approach within your helios service's command or entrypoint.
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✅ Security hotspots resolved Both SonarCloud hotspots have been addressed: Replaced recursive COPY . . with explicit paths to avoid leaking sensitive files Added a non-root user in the runtime stage for safer container execution Proxy, metrics, and admin API are working as expected. The Docker setup is now secure, reproducible, and ready for team use. |
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@0xReLogic ✅ Docker setup and security patches are complete. The failed CI checks are caused by missing go.sum during cache restore, which is unrelated to this PR’s scope. Let me know if you'd like me to patch the workflow or add a dummy file. |
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Review Feedback
Thanks for working on this @Utkarsh9571. The Docker implementation is a good start, but there are several issues that need to be addressed before we can merge this PR.
Missing Requirements from Issue #27
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.dockerignorefile is missing- This is required to optimize the build context
- Should exclude
.git/,*.md,*.bat, test files, etc.
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README documentation not updated
- The issue specifically asks for a Docker deployment section in README
- Please add documentation explaining how to use the Docker setup
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Health checks in docker-compose.yaml
- The issue requirements mention health checks in Docker Compose
- Currently only using
depends_onwhich doesn't wait for services to be healthy
Issues in Dockerfile
Line 5-6 has duplicate COPY:
COPY go.mod go.sum ./
RUN go mod download
COPY go.mod go.sum ./ # <- This is duplicatedRemove the duplicate line.
Inefficient layer caching:
The current order doesn't optimize Docker layer caching. It should be:
# Copy dependency files first
COPY go.mod go.sum ./
RUN go mod download
# Then copy source code
COPY cmd/helios ./cmd/helios
COPY internal/ ./internalIssues in docker-compose.yaml
- Missing health checks - Required by issue #27
- No restart policy - Should add
restart: unless-stopped - Backend services are empty - The nginx containers have no custom content to serve
Consider adding health checks like:
helios:
healthcheck:
test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:8080/health"]
interval: 10s
timeout: 5s
retries: 3Issues in helios.yaml
The changes to helios.yaml break the existing non-Docker setup:
- Changing backend addresses from
localhost:808xtobackend1:80means the config only works in Docker - The whitespace-only changes (removing trailing spaces after comments) are unnecessary noise
My mistake in the issue template - I should have been clearer about this. Here are two options:
Option 1 (Recommended): Create helios.docker.yaml as a separate file
- Keep original
helios.yamlunchanged for local development - Create
helios.docker.yamlwith Docker service names - Update Dockerfile CMD to:
["./helios", "--config", "helios.docker.yaml"] - Update docker-compose.yaml volume to mount
helios.docker.yaml
Option 2: Make helios.yaml work for both scenarios
- Use environment variable substitution in docker-compose.yaml
- But this is more complex and not recommended
I prefer Option 1 as it's cleaner and doesn't break existing workflows.
Required Changes
Before this can be merged, please:
- Add
.dockerignorefile - Update README.md with Docker deployment instructions
- Add health checks to docker-compose.yaml
- Fix the duplicate COPY in Dockerfile
- Revert changes to
helios.yamland createhelios.docker.yamlinstead - Update Dockerfile and docker-compose.yaml to use
helios.docker.yaml
Let me know if you need clarification on any of these points.
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Gates Failed
(1 file with Complex Method)
Gates Passed
See analysis details in CodeScene
Reason for failure
| Enforce advisory code health rules | Violations | Code Health Impact | |
|---|---|---|---|
| main.go | 1 advisory rule | 9.03 → 9.02 | Suppress |
Absence of Expected Change Pattern
- Helios/cmd/helios/main.go is usually changed with: Helios/internal/config/config.go
Quality Gate Profile: Pay Down Tech Debt
Want more control? Customize Code Health rules or catch issues early with our IDE extension and CLI tool.
| configPath := flag.String("config", "helios.yaml", "Path to config file") | ||
| flag.Parse() | ||
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| cfg, err := config.LoadConfig(*configPath) |
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❌ Getting worse: Complex Method
main already has high cyclomatic complexity, and now it increases in Lines of Code from 125 to 127
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✅ All requested changes applied: Docker Compose setup added with health checks and plugin routing helios.docker.yaml created for safe config loading Dockerfile patched with explicit COPY and non-root runtime .dockerignore added to reduce build context and avoid secrets 🔍 Regarding CodeScene: main.go was updated to support --config flag This change calls config.LoadConfig, but config.go itself didn’t need modification LOC increase is minimal and scoped to CLI flag parsing Let me know if you'd prefer this split into smaller commits or if you'd like a refactor to reduce complexity. |
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Excellent work addressing all the feedback @Utkarsh9571.
All requested changes have been implemented:
.dockerignoreadded with appropriate exclusions- README updated with comprehensive Docker deployment section
- Health checks added to docker-compose.yaml
- Dockerfile duplicate COPY fixed and layer caching optimized
helios.docker.yamlcreated as separate config file--configflag support added to main.go- Restart policy and proper backend configuration included
The implementation goes beyond the requirements with custom nginx configuration and detailed documentation. The whitespace changes in helios.yaml are just formatting cleanup and don't affect functionality.
Merging this PR.
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@0xReLogic thank you man. |
2 participants
This PR adds a multi-stage Dockerfile and docker-compose.yml to run Helios with 3 backend services (nginx:alpine). It mounts helios.yaml, exposes ports 8080, 9090, and 9091, and uses Docker service names for backend routing.
✅ Proxy works with ip_hash load balancing
✅ Plugin headers (X-App, X-Request-ID, X-Trace-ID) confirmed
✅ Metrics and admin API exposed
Resolves #27