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Open-source metadata collector based on ODD Specification

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# odd-collector
ODD Collector is a lightweight service that gathers metadata from all your data sources.

To learn more about collector types and ODD Platform's architecture, [read the documentation](https://docs.opendatadiscovery.org/architecture).

## Preview:
- [odd-collector](#odd-collector)
  - [Preview:](#preview)
  - [Implemented adapters](#implemented-adapters)
  - [Class diagram of adapter class hierarchy](#class-diagram-of-adapter-class-hierarchy)
  - [Building](#building)
  - [M1 building issue](#m1-building-issue)
  - [Docker compose example](#docker-compose-example)

## Implemented adapters

| Service       | Config example                                                                          |
| ------------- | --------------------------------------------------------------------------------------- |
| Cassandra     | [config](config_examples/cassandra.yaml)                                                |
| ClickHouse    | [config](config_examples/clickhouse.yaml)                                               |
| Dbt           | [config](config_examples/dbt.yaml)                                                      |
| Elasticsearch | [config](config_examples/elasticsearch.yaml)                                            |
| Feast         | [config](config_examples/feast.yaml)                                                    |
| Hive          | [config](config_examples/hive.yaml)                                                     |
| Kafka         | [config](config_examples/kafka.yaml)                                                    |
| Kubeflow      | [config](config_examples/kubeflow.yaml)                                                 |
| MariaDB       | [config](config_examples/mysql.yaml), _supported via MySql adapter_                     |
| MongoDB       | [config](config_examples/mongodb.yaml)                                                  |
| MSSql         | [config](config_examples/mssql.yaml)                                                    |
| MySql         | [config](config_examples/mysql.yaml)                                                    |
| Neo4j         | [config](config_examples/neo4j.yaml)                                                    |
| PostgreSQL    | [config](config_examples/postgresql.yaml)                                               |
| Presto        | [config](config_examples/presto.yaml)                                                   |
| Redash        | [config](config_examples/redash.yaml)                                                   |
| Redshift      | [config](config_examples/redshift.yaml)                                                 |
| Snowflake     | [config](config_examples/snowflake.yaml)                                                |
| Superset      | [config](config_examples/superset.yaml)                                                 |
| Tableau       | [config](config_examples/tableau.yaml)                                                  |
| Tarantool     | [config](config_examples/tarantool.yaml)                                                |
| Trino         | [config](config_examples/trino.yaml)                                                    |
| Vertica       | [config](config_examples/vertica.yaml)                                                  |
| ODBC          | [config](config_examples/odbc.yaml), [README.md](odd_collector/adapters/odbc/README.md) |
| Cube          | [config](config_examples/cubejs.yaml)                                                   |
| ODD Adapter   | [config](config_examples/odd_adapter.yaml)                                              |
| Apache Druid  | [config](config_examples/druid.yaml)                                                    |
| Oracle        | [config](config_examples/oracle.yaml)                                                   |
| Airbyte       | [config](config_examples/airbyte.yaml)                                                  |
| SingleStore   | [config](config_examples/singlestore.yaml)                                              |
| cockroachdb   | [config](config_examples/cockroachdb.yaml)                                              |
| sqlite        | [config](config_examples/sqlite.yaml)                                              |

## Class diagram of adapter class hierarchy
This may help you to understand which fields you need for each adapter in `collector_config.yaml` and also may be helpful for a new adapter developer.
![Adapter domain class hierarchy](https://raw.githubusercontent.com/opendatadiscovery/odd-collector/main/adapter_domain_classes.png)

PlantUML code for above diagram: [domain_classes.plantuml](domain_classes.plantuml)

To regenerate picture, you have 2 options:
1. Having PlantUML installed locally, do
```shell
java -jar plantuml.jar domain_classes.plantuml
```
2. Use PyCharm or other IDE's PlantUML plugin

## Building
```bash
docker build .
```

## M1 building issue

**libraries** `pyodbc` , `confluent-kafka` and `grpcio`   have problem during installing and building project on Mac M1.

- https://github.com/mkleehammer/pyodbc/issues/846
- https://github.com/confluentinc/confluent-kafka-python/issues/1190
- https://github.com/grpc/grpc/issues/25082

Possible solutions
```bash
# NOTE: be aware of versions
# NOTE: easiest way is to add all export statements to your .bashrc/.zshrc file

# pyodbc dependencies
brew install unixodbc freetds openssl

export LDFLAGS="-L/opt/homebrew/lib  -L/opt/homebrew/Cellar/unixodbc/2.3.11/include -L/opt/homebrew/Cellar/freetds/1.3.17/lib -L/opt/homebrew/Cellar/openssl@1.1/1.1.1t/lib"
export CFLAGS="-I/opt/homebrew/Cellar/unixodbc/2.3.11/include -I/opt/homebrew/opt/freetds/include"
export CPPFLAGS="-I/opt/homebrew/include -I/opt/homebrew/Cellar/unixodbc/2.3.11/include -I/opt/homebrew/opt/openssl@3/include"

# confluent-kafka
brew install librdkafka

export C_INCLUDE_PATH=/opt/homebrew/Cellar/librdkafka/1.9.0/include
export LIBRARY_PATH=/opt/homebrew/Cellar/librdkafka/1.9.0/lib
export PATH="/opt/homebrew/opt/openssl@3/bin:$PATH"

# grpcio
export GRPC_PYTHON_BUILD_SYSTEM_OPENSSL=1
export GRPC_PYTHON_BUILD_SYSTEM_ZLIB=1

# mymssql
brew install freetds
export LDFLAGS="-L/opt/homebrew/Cellar/freetds/1.3.17/lib -L/opt/homebrew/Cellar/openssl@1.1/1.1.1t/lib"
```

## Docker compose example
Custom `.env` file for docker-compose.yaml
```
LOGLEVEL=DEBUG
PLATFORM_HOST_URL=http://odd-platform:8080
POSTGRES_PASSWORD=postgres_password_secret
```

There are 3 options for config field pass:
1. Explicitly set it in `collector_config.yaml` file, i.e `database: odd-platform-db`
2. Use `.env` file or ENV variables
3. In situation when plugins have same field names, we can  explicitly set ENV variable to `collector_config.yaml`, i.e. `password: !ENV ${POSTGRES_PASSWORD}`

Custom `collector-config.yaml`
```yaml
platform_host_url: http://localhost:8080
default_pulling_interval: 10
token: ""
plugins:
  - type: postgresql
    name: test_postgresql_adapter
    host: "localhost"
    port: 5432
    database: "some_database_name"
    user: "some_user_name"
    password: !ENV ${POSTGRES_PASSWORD}
  - type: mysql
    name: test_mysql_adapter
    host: "localhost"
    port: 3306
    database: "some_database_name"
    user: "some_user_name"
    password: "some_password"
```

docker-compose.yaml
```yaml
version: "3.8"
services:
  # --- ODD Platform ---
  database:
    ...
  odd-platform:
    ...

odd-collector:
    image: ghcr.io/opendatadiscovery/odd-collector:latest
    restart: always
    volumes:
      - collector_config.yaml:/app/collector_config.yaml
    environment:
      - PLATFORM_HOST_URL=${PLATFORM_HOST_URL}
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
    depends_on:
      - odd-platform
```

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