secrets/dataops/nova_services_connection.md

Nova Required Services Connection Guide

Service Matrix

Service	Port	Purpose	Status
PostgreSQL	5432	Structured data	✅ Operational
MongoDB	27017	Document storage	✅ Operational
ChromaDB	8000	Semantic memory	✅ Operational
Redis (Default)	6379	Working memory	✅ Operational

PostgreSQL Connection

# Connect to PostgreSQL
psql -h localhost -p 5432 -U postgres

# List databases
\l

# Basic SQL
SELECT version();
CREATE DATABASE nova_core;

Python Example:

import psycopg2

conn = psycopg2.connect(
    host="localhost",
    port=5432,
    user="postgres",
    database="nova_core"
)

cur = conn.cursor()
cur.execute("SELECT NOW();")
print(f"PostgreSQL time: {cur.fetchone()}")

MongoDB Connection

# Connect to MongoDB
mongosh --port 27017

# Show databases
show dbs

# Use nova database
use nova

# Basic operations
db.sessions.insertOne({session_id: "test", data: {}})

Python Example:

from pymongo import MongoClient

client = MongoClient("localhost", 27017)
db = client.nova
collection = db.sessions

# Insert document
result = collection.insert_one({
    "session_id": "test_123",
    "timestamp": "2025-08-24",
    "data": {"status": "active"}
})
print(f"Inserted ID: {result.inserted_id}")

ChromaDB Connection

# Health check
curl http://localhost:8000/api/v1/heartbeat

# List collections
curl http://localhost:8000/api/v1/collections

Python Example:

import chromadb

client = chromadb.HttpClient(host="localhost", port=8000)

# Create collection
collection = client.create_collection("nova_memories")

# Add embeddings
collection.add(
    documents=["Memory example 1", "Memory example 2"],
    metadatas=[{"type": "fact"}, {"type": "experience"}],
    ids=["id1", "id2"]
)

# Query similar memories
results = collection.query(
    query_texts=["example memory"],
    n_results=2
)
print(f"Similar memories: {results}")

Health Monitoring

# PostgreSQL
pg_isready -h localhost -p 5432

# MongoDB
mongosh --eval "db.adminCommand('ping')" --quiet

# ChromaDB  
curl -s http://localhost:8000/api/v1/heartbeat | jq .

Security Notes

• ❗ All services bound to localhost only
• ❗ No authentication configured (development)
• ❗ Regular backup procedures needed
• ❗ Monitor disk usage on /data partition
• ❗ Consider adding authentication for production

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Last Updated: September 4, 2025