miroir/examples/README.md

Miroir Docker Compose Examples

This directory contains example Docker Compose configurations for running Miroir locally. These are intended for development, testing, and onboarding — not for production deployments.

Quick Start (5 minutes)

Start the development stack with 3 Meilisearch nodes and one Miroir orchestrator:

# From the repository root
docker compose -f examples/docker-compose-dev.yml up -d

# Verify health
curl http://localhost:7700/health
# Expected: {"status":"available"}

# Index documents (Meilisearch-compatible API)
curl -X POST http://localhost:7700/indexes/movies/documents \
  -H "Authorization: Bearer dev-key" \
  -H "Content-Type: application/json" \
  -d '[{"id": 1, "title": "Inception"}, {"id": 2, "title": "Interstellar"}]'

# Search
curl -X POST http://localhost:7700/indexes/movies/search \
  -H "Authorization: Bearer dev-key" \
  -H "Content-Type: application/json" \
  -d '{"q": "inception"}'

# Teardown (removes containers and volumes)
docker compose -f examples/docker-compose-dev.yml down -v

Architecture

The development stack (docker-compose-dev.yml) consists of:

Service	Container Name	Port	Purpose
miroir	miroir-orchestrator	7700	Miroir orchestrator (client-facing API)
meili-0	miroir-meili-0	7701	Meilisearch node 0 (shard replica group 0)
meili-1	miroir-meili-1	7702	Meilisearch node 1 (shard replica group 0)
meili-2	miroir-meili-2	7703	Meilisearch node 2 (shard replica group 0)
redis	miroir-redis	6379	Optional: Task store for multi-replica deployments

Sharding Configuration

The default dev-config.yaml configures:

• 16 logical shards striped across 3 nodes
• Replication factor: 1 (no redundancy; use RF≥2 for production)
• 1 replica group (all nodes in the same failure domain)
• Task store: SQLite (use Redis for multi-replica deployments)

Multi-Replica Setup with Redis

For testing multi-replica deployments (RF≥2), enable Redis:

1. Uncomment the redis service in docker-compose-dev.yml
2. Update dev-config.yaml to use Redis:

task_store:
  backend: redis
  url: "redis://redis:6379"

3. Increase replication factor:

replication_factor: 2

4. Restart the stack:

docker compose -f examples/docker-compose-dev.yml down -v
docker compose -f examples/docker-compose-dev.yml up -d

Configuration

The Miroir orchestrator is configured via dev-config.yaml, which is mounted read-only into the container at /etc/miroir/config.yaml. Key settings:

Setting	Value	Description
master_key	dev-key	Client API key (use for local testing)
node_master_key	dev-node-key	Key Miroir uses to authenticate to Meilisearch nodes
shards	16	Number of logical shards
replication_factor	1	Replication factor (increase for redundancy)
task_store.backend	sqlite	Task store backend (sqlite for dev, redis for multi-replica)

Direct Meilisearch Access

You can access individual Meilisearch nodes directly (useful for debugging):

# Node 0
curl http://localhost:7701/health

# Node 1
curl http://localhost:7702/health

# Node 2
curl http://localhost:7703/health

Note: Direct writes to Meilisearch nodes bypass Miroir's shard routing and are not recommended. Always write through the Miroir orchestrator.

Logs

View logs for all services:

docker compose -f examples/docker-compose-dev.yml logs -f

View logs for a specific service:

docker compose -f examples/docker-compose-dev.yml logs -f miroir
docker compose -f examples/docker-compose-dev.yml logs -f meili-0

Troubleshooting

Containers not starting

# Check container status
docker compose -f examples/docker-compose-dev.yml ps

# Check logs for errors
docker compose -f examples/docker-compose-dev.yml logs

Health check failing

# Wait for containers to become healthy (can take 30-60 seconds)
docker compose -f examples/docker-compose-dev.yml ps

# If health checks fail, check individual node health
curl http://localhost:7701/health
curl http://localhost:7702/health
curl http://localhost:7703/health

Port conflicts

If ports 7700-7703 are already in use, modify the port mappings in docker-compose-dev.yml:

ports:
  - "7700:7700"  # Change to "7710:7700" if 7700 is in use

Reset everything

# Stop and remove all containers and volumes
docker compose -f examples/docker-compose-dev.yml down -v

# Restart from scratch
docker compose -f examples/docker-compose-dev.yml up -d

Production Deployment

For production deployments on Kubernetes, use the Miroir Helm chart. See the main README.md for production deployment instructions.

CI/CD

The Docker Compose stack is exercised by CI smoke tests on every PR. See k8s/argo-workflows/miroir-ci-docker-compose-smoke.yaml for the test workflow.