Eru — Why code? Simply configure.

The eru idea

Change a backend.
Not your code.

Every module sits on the same swappable primitives — cache, vector store, database, storage, LLM. Point a JSON config at a different provider and Eru rewires itself. No rebuilds, no rewrites.

eru-ql Postgres database connection

eru-ql/db.json

{
  "db_config": {
    "host": "orders-pg.prod.svc.cluster.local",
    "port": "5432",
    "user": "$SECRET_orders_pg_user",
    "password": "$SECRET_orders_pg_password",
    "default_db": "orders",
    "default_schema": "public",
    "driver_config": {
      "max_open_conns": 25,
      "max_idle_conns": 5,
      "conn_max_lifetime": 3600000000000
    }
  }
}

eru-files AWS S3 object storage

eru-files/storage.json

{
  "storage_type": "AWS",
  "storage_name": "user-uploads",
  "encrypt_files": true,
  "region": "ap-south-1",
  "bucket_name": "eru-prod-user-uploads",
  "authentication": "iam-role"
}

eru-ai OpenAI LLM provider

eru-ai/llm.json

{
  "llm_name": "default-chat",
  "provider": "OPENAI",
  "llm_secret": "$SECRET_openai_api_key",
  "model_name": "gpt-4o-mini",
  "temprature": 0.2
}

eru-cache Redis cache

eru-cache/redis.json

{
  "cache_store_type": "REDIS",
  "cache_db_alias": "session-cache",
  "persist_enabled": false,
  "cache_addr": "$VAR_redis_cache",
  "cache_password": "$SECRET_redis_password",
  "cache_username": "$SECRET_redis_username",
  "min_idle_conns": 4,
  "default_ttl_sec": 600,
  "read_timeout_ms": 3000,
  "write_timeout_ms": 3000,
  "max_retries": 2,
  "tag_set_ttl_sec_max": 86400,
  "tls_enabled": true,
  "tls_skip_verify": false,
  "tls_server_name": "$SECRET_redis_server_name"
}

eru-auth Google OAuth provider

eru-auth/google.json

{
  "auth_type": "OAUTH",
  "auth_name": "google",
  "token_header_key": "token",
  "key_id": "google-prod-2024",
  "oauth_config": {
    "client_id": "$SECRET_google_client_id",
    "client_secret": "$SECRET_google_client_secret",
    "redirect_uri": "$VAR_google_redirect_url",
    "sso_base_url": "https://accounts.google.com/o/oauth2/v2/auth",
    "token_url": "https://oauth2.googleapis.com/token",
    "token_key": "access_token",
    "token_url_content_type": "application/x-www-form-urlencoded",
    "redirect_key": "redirect_uri",
    "jwk_url": "https://www.googleapis.com/oauth2/v3/certs",
    "scope": "openid profile email"
  }
}

eru-ai Pinecone vector store

eru-ai/vectorstore.json

{
  "vector_name": "knowledge-base",
  "vector_type": "pinecone",
  "api_key": "$SECRET_pinecone_api_key",
  "index": {
    "vector_type": "dense",
    "dimension": 1536,
    "metric": "cosine"
  }
}

Database

Postgres MySQL SQL Server Iceberg

Object storage

AWS S3 Azure Blob GCS Google Drive

LLM provider

OpenAI Anthropic Bedrock Gemini

Cache

Redis Redis Cluster etcd In-memory

OAuth provider

Google Microsoft Eru Genric Ouath

Vector store

Pinecone ChromaDB pgvector S3 Vectors

Platform foundations

Pluggable by design. Configure, don't rewrite.

Twelve shared primitives power every module. Each one speaks an interface with multiple drivers — change the provider with config, keep the code.

Cache

RedisRedis ClusteretcdIn-memory

Vector store

PineconeChromaDBpgvectorS3 Vectors

Embeddings

OpenAIAnthropicBedrockHuggingFace

Secret manager

AWS Secret ManagerGCP Secret Manager

OLTP database

PostgresMySQLSQL Server

Lakehouse / Analytics

Apache Iceberg (S3 Tables)AWS Athena

Event bus

KafkaSNSSQSPub/Sub

Object storage

S3Azure BlobGCSDriveOneDrive

Crypto

JWTRSAAESHMACPKCE

Scheduler

pg-cronGeneric scheduler

Repos / versioning

GitHub

Observability

OpenTelemetryStructured logs

Why code?
Simply configure.

Building blocks for cloud-native apps

Change a backend.
Not your code.

Pluggable by design. Configure, don't rewrite.

Build the app. Skip the plumbing.

Building blocks for cloud-native apps

Change a backend.Not your code.

Pluggable by design. Configure, don't rewrite.

Build the app. Skip the plumbing.

Change a backend.
Not your code.