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DataHub Generalized Metadata Store (GMS)

DataHub GMS is a Rest.li service written in Java. It is following common Rest.li server development practices and all data models are Pegasus(.pdl) models.

Pre-requisites

  • You need to have JDK8 installed on your machine to be able to build DataHub GMS.

Build

DataHub GMS is already built as part of top level build:

./gradlew build

However, if you only want to build DataHub GMS specifically:

./gradlew :gms:war:build

Dependencies

Before starting DataHub GMS, you need to make sure that Kafka, Schema Registry & Zookeeper,
Elasticsearch and MySQL Docker containers are up and running.

Start via Docker image

Quickest way to try out DataHub GMS is running the Docker image.

Start via command line

If you do modify things and want to try it out quickly without building the Docker image, you can also run the application directly from command line after a successful build:

./gradlew :gms:war:run

API Documentation

You can access basic documentation on the API endpoints by opening the /restli/docs endpoint in the browser.

python -c "import webbrowser; webbrowser.open('http://localhost:8080/restli/docs', new=2)"

Sample API Calls

As GMS uses Rest.li 2.0 protocol, please make sure to add -H 'X-RestLi-Protocol-Version:2.0.0' to all curl calls

Create user

curl 'http://localhost:8080/corpUsers?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '{"snapshot": {"aspects": [{"com.linkedin.identity.CorpUserInfo":{"active": true, "displayName": "Foo Bar", "fullName": "Foo Bar", "email": "fbar@linkedin.com"}}, {"com.linkedin.identity.CorpUserEditableInfo":{}}], "urn": "urn:li:corpuser:fbar"}}'

Create group

curl 'http://localhost:8080/corpGroups?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '{"snapshot": {"aspects": [{"com.linkedin.identity.CorpGroupInfo":{"email": "dev@linkedin.com", "admins": ["urn:li:corpUser:jdoe"], "members": ["urn:li:corpUser:datahub", "urn:li:corpUser:jdoe"], "groups": []}}], "urn": "urn:li:corpGroup:dev"}}'

Create dataset

curl 'http://localhost:8080/datasets?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '{"snapshot": {"aspects":[{"com.linkedin.common.Ownership":{"owners":[{"owner":"urn:li:corpuser:fbar","type":"DATAOWNER"}],"lastModified":{"time":0,"actor":"urn:li:corpuser:fbar"}}},{"com.linkedin.dataset.UpstreamLineage":{"upstreams":[{"auditStamp":{"time":0,"actor":"urn:li:corpuser:fbar"},"dataset":"urn:li:dataset:(urn:li:dataPlatform:foo,barUp,PROD)","type":"TRANSFORMED"}]}},{"com.linkedin.common.InstitutionalMemory":{"elements":[{"url":"https://www.linkedin.com","description":"Sample doc","createStamp":{"time":0,"actor":"urn:li:corpuser:fbar"}}]}},{"com.linkedin.schema.SchemaMetadata":{"schemaName":"FooEvent","platform":"urn:li:dataPlatform:foo","version":0,"created":{"time":0,"actor":"urn:li:corpuser:fbar"},"lastModified":{"time":0,"actor":"urn:li:corpuser:fbar"},"hash":"","platformSchema":{"com.linkedin.schema.KafkaSchema":{"documentSchema":"{\"type\":\"record\",\"name\":\"MetadataChangeEvent\",\"namespace\":\"com.linkedin.mxe\",\"doc\":\"Kafka event for proposing a metadata change for an entity.\",\"fields\":[{\"name\":\"auditHeader\",\"type\":{\"type\":\"record\",\"name\":\"KafkaAuditHeader\",\"namespace\":\"com.linkedin.avro2pegasus.events\",\"doc\":\"Header\"}}]}"}},"fields":[{"fieldPath":"foo","description":"Bar","nativeDataType":"string","type":{"type":{"com.linkedin.schema.StringType":{}}}}]}}],"urn":"urn:li:dataset:(urn:li:dataPlatform:foo,bar,PROD)"}}'

Create chart

curl 'http://localhost:8080/charts?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '{"snapshot":{"aspects":[{"com.linkedin.chart.ChartInfo":{"title":"Baz Chart 1","description":"Baz Chart 1","inputs":[{"string":"urn:li:dataset:(urn:li:dataPlatform:hdfs,SampleHdfsDataset,PROD)"}],"lastModified":{"created":{"time":0,"actor":"urn:li:corpuser:jdoe"},"lastModified":{"time":0,"actor":"urn:li:corpuser:datahub"}}}}],"urn":"urn:li:chart:(looker,baz1)"}}'

Create dashboards

curl 'http://localhost:8080/dashboards?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '{"snapshot":{"aspects":[{"com.linkedin.dashboard.DashboardInfo":{"title":"Baz Dashboard","description":"Baz Dashboard","charts":["urn:li:chart:(looker,baz1)","urn:li:chart:(looker,baz2)"],"lastModified":{"created":{"time":0,"actor":"urn:li:corpuser:jdoe"},"lastModified":{"time":0,"actor":"urn:li:corpuser:datahub"}}}}],"urn":"urn:li:dashboard:(looker,baz)"}}'

Get all dataplatforms

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get_all' 'http://localhost:8080/dataPlatforms' | jq

Get dataplatform

curl 'http://localhost:8080/dataPlatforms/hdfs?aspects=List(com.linkedin.dataplatform.DataPlatformInfo)' -H 'X-RestLi-Protocol-Version:2.0.0' -s | jq
{
  "name": "hdfs",
  "dataPlatformInfo": {
    "name": "hdfs",
    "type": "FILE_SYSTEM",
    "datasetNameDelimiter": "/"
  }
}

Get user

curl 'http://localhost:8080/corpUsers/($params:(),name:fbar)' -H 'X-RestLi-Protocol-Version:2.0.0' -s | jq

{
  "editableInfo": {},
  "username": "fbar",
  "info": {
    "displayName": "Foo Bar",
    "active": true,
    "fullName": "Foo Bar",
    "email": "fbar@linkedin.com"
  }
}

Get group

curl 'http://localhost:8080/corpGroups/($params:(),name:dev)' -H 'X-RestLi-Protocol-Version:2.0.0' -s | jq

{
  "name": "dev",
  "info": {
    "groups": [],
    "email": "dev@linkedin.com",
    "admins": [
      "urn:li:corpuser:jdoe"
    ],
    "members": [
      "urn:li:corpuser:datahub",
      "urn:li:corpuser:jdoe"
    ]
  }
}

Get dataset

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get' 'http://localhost:8080/datasets/($params:(),name:bar,origin:PROD,platform:urn%3Ali%3AdataPlatform%3Afoo)' | jq

{
  "urn": "urn:li:dataset:(urn:li:dataPlatform:foo,bar,PROD)",
  "ownership": {
    "owners": [
      {
        "owner": "urn:li:corpuser:fbar",
        "type": "DATAOWNER"
      }
    ],
    "lastModified": {
      "actor": "urn:li:corpuser:fbar",
      "time": 0
    }
  },
  "origin": "PROD",
  "name": "bar",
  "institutionalMemory": {
    "elements": [
      {
        "createStamp": {
          "actor": "urn:li:corpuser:fbar",
          "time": 0
        },
        "description": "Sample doc",
        "url": "https://www.linkedin.com"
      }
    ]
  },
  "schemaMetadata": {
    "created": {
      "actor": "urn:li:corpuser:fbar",
      "time": 0
    },
    "platformSchema": {
      "com.linkedin.schema.KafkaSchema": {
        "documentSchema": "{\"type\":\"record\",\"name\":\"MetadataChangeEvent\",\"namespace\":\"com.linkedin.mxe\",\"doc\":\"Kafka event for proposing a metadata change for an entity.\",\"fields\":[{\"name\":\"auditHeader\",\"type\":{\"type\":\"record\",\"name\":\"KafkaAuditHeader\",\"namespace\":\"com.linkedin.avro2pegasus.events\",\"doc\":\"Header\"}}]}"
      }
    },
    "lastModified": {
      "actor": "urn:li:corpuser:fbar",
      "time": 0
    },
    "schemaName": "FooEvent",
    "fields": [
      {
        "fieldPath": "foo",
        "description": "Bar",
        "type": {
          "type": {
            "com.linkedin.schema.StringType": {}
          }
        },
        "nativeDataType": "string"
      }
    ],
    "version": 0,
    "hash": "",
    "platform": "urn:li:dataPlatform:foo"
  },
  "upstreamLineage": {
    "upstreams": [
      {
        "auditStamp": {
          "actor": "urn:li:corpuser:fbar",
          "time": 0
        },
        "type": "TRANSFORMED",
        "dataset": "urn:li:dataset:(urn:li:dataPlatform:foo,barUp,PROD)"
      }
    ]
  },
  "platform": "urn:li:dataPlatform:foo"
}

Get chart

curl 'http://localhost:8080/charts/($params:(),tool:looker,chartId:baz1)' -H 'X-RestLi-Protocol-Version:2.0.0' -s | jq

{
  "chartId": "baz1",
  "tool": "looker",
  "info": {
    "description": "Baz Chart 1",
    "lastModified": {
      "created": {
        "actor": "urn:li:corpuser:jdoe",
        "time": 0
      },
      "lastModified": {
        "actor": "urn:li:corpuser:datahub",
        "time": 0
      }
    },
    "title": "Baz Chart 1",
    "inputs": [
      {
        "string": "urn:li:dataset:(urn:li:dataPlatform:hdfs,SampleHdfsDataset,PROD)"
      }
    ]
  }
}

Get dashboard

curl 'http://localhost:8080/dashboards/($params:(),tool:looker,dashboardId:foo)' -H 'X-RestLi-Protocol-Version:2.0.0' -s | jq

{
  "dashboardId": "foo",
  "tool": "looker",
  "info": {
    "description": "Foo Dashboard",
    "charts": [],
    "lastModified": {
      "created": {
        "actor": "urn:li:corpuser:jdoe",
        "time": 0
      },
      "lastModified": {
        "actor": "urn:li:corpuser:jdoe",
        "time": 0
      }
    },
    "title": "Foo Dashboard"
  }
}

Get all users

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get_all' 'http://localhost:8080/corpUsers' | jq

{
  "elements": [
    {
      "editableInfo": {},
      "username": "fbar",
      "info": {
        "displayName": "Foo Bar",
        "active": true,
        "fullName": "Foo Bar",
        "email": "fbar@linkedin.com"
      }
    },
    {
      "editableInfo": {
        "skills": [],
        "teams": [],
        "pictureLink": "https://content.linkedin.com/content/dam/me/business/en-us/amp/brand-site/v2/bg/LI-Bug.svg.original.svg"
      },
      "username": "ksahin",
      "info": {
        "displayName": "Kerem Sahin",
        "active": true,
        "fullName": "Kerem Sahin",
        "email": "ksahin@linkedin.com"
      }
    },
    {
      "editableInfo": {
        "skills": [],
        "teams": [],
        "pictureLink": "https://content.linkedin.com/content/dam/me/business/en-us/amp/brand-site/v2/bg/LI-Bug.svg.original.svg"
      },
      "username": "datahub",
      "info": {
        "displayName": "Data Hub",
        "active": true,
        "fullName": "Data Hub",
        "email": "datahub@linkedin.com"
      }
    }
  ],
  "paging": {
    "count": 10,
    "start": 0,
    "links": []
  }
}

Browse datasets

curl "http://localhost:8080/datasets?action=browse" -d '{"path": "", "start": 0, "limit": 10}' -X POST -H 'X-RestLi-Protocol-Version: 2.0.0' | jq

{
  "value": {
    "numEntities": 0,
    "metadata": {
      "totalNumEntities": 2,
      "path": "",
      "groups": [
        {
          "name": "prod",
          "count": 2
        }
      ]
    },
    "entities": [],
    "pageSize": 10,
    "from": 0
  }
}

Search users

curl "http://localhost:8080/corpUsers?q=search&input=foo&" -X GET -H 'X-RestLi-Protocol-Version: 2.0.0' -H 'X-RestLi-Method: finder' | jq

{
  "metadata": {
    "searchResultMetadatas": [
      {
        "name": "title",
        "aggregations": {}
      }
    ]
  },
  "elements": [
    {
      "editableInfo": {},
      "username": "fbar",
      "info": {
        "displayName": "Foo Bar",
        "active": true,
        "fullName": "Foo Bar",
        "email": "fbar@linkedin.com"
      }
    }
  ],
  "paging": {
    "total": 1,
    "count": 10,
    "start": 0,
    "links": []
  }
}

Search datasets

curl "http://localhost:8080/datasets?q=search&input=bar" -X GET -H 'X-RestLi-Protocol-Version: 2.0.0' -H 'X-RestLi-Method: finder' | jq

{
  "metadata": {
    "searchResultMetadatas": [
      {
        "name": "platform",
        "aggregations": {
          "foo": 1
        }
      },
      {
        "name": "origin",
        "aggregations": {
          "prod": 1
        }
      }
    ]
  },
  "elements": [
    {
      "urn": "urn:li:dataset:(urn:li:dataPlatform:foo,bar,PROD)",
      "origin": "PROD",
      "name": "bar",
      "platform": "urn:li:dataPlatform:foo"
    }
  ],
  "paging": {
    "total": 1,
    "count": 10,
    "start": 0,
    "links": []
  }
}

Search dashboards

curl "http://localhost:8080/dashboards?q=search&input=looker" -X GET -H 'X-RestLi-Protocol-Version: 2.0.0' -H 'X-RestLi-Method: finder' | jq

{
  "metadata": {
    "urns": [
      "urn:li:dashboard:(looker,baz)"
    ],
    "searchResultMetadatas": [
      {
        "name": "tool",
        "aggregations": {
          "looker": 1
        }
      },
      {
        "name": "access",
        "aggregations": {}
      }
    ]
  },
  "elements": [
    {
      "dashboardId": "baz",
      "tool": "looker",
      "info": {
        "description": "Baz Dashboard",
        "charts": [
          "urn:li:chart:(looker,baz1)",
          "urn:li:chart:(looker,baz2)"
        ],
        "lastModified": {
          "created": {
            "actor": "urn:li:corpuser:jdoe",
            "time": 0
          },
          "lastModified": {
            "actor": "urn:li:corpuser:datahub",
            "time": 0
          }
        },
        "title": "Baz Dashboard"
      }
    }
  ],
  "paging": {
    "count": 10,
    "start": 0,
    "total": 1,
    "links": []
  }
}

Typeahead for datasets

curl "http://localhost:8080/datasets?action=autocomplete" -d '{"query": "bar", "field": "name", "limit": 10, "filter": {"criteria": []}}' -X POST -H 'X-RestLi-Protocol-Version: 2.0.0' | jq

{
  "value": {
    "query": "bar",
    "suggestions": [
      "bar"
    ]
  }
}

Get dataset ownership

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get' 'http://localhost:8080/datasets/($params:(),name:bar,origin:PROD,platform:urn%3Ali%3AdataPlatform%3Afoo)/rawOwnership/0' | jq

{
  "owners": [
    {
      "owner": "urn:li:corpuser:fbar",
      "type": "DATAOWNER"
    },
    {
      "owner": "urn:li:corpuser:ksahin",
      "type": "DATAOWNER"
    }
  ],
  "lastModified": {
    "actor": "urn:li:corpuser:ksahin",
    "time": 1568015476480
  }
}

Get dataset schema

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get' 'http://localhost:8080/datasets/($params:(),name:bar,origin:PROD,platform:urn%3Ali%3AdataPlatform%3Afoo)/schema/0' | jq

{
  "created": {
    "actor": "urn:li:corpuser:fbar",
    "time": 0
  },
  "platformSchema": {
    "com.linkedin.schema.KafkaSchema": {
      "documentSchema": "{\"type\":\"record\",\"name\":\"MetadataChangeEvent\",\"namespace\":\"com.linkedin.mxe\",\"doc\":\"Kafka event for proposing a metadata change for an entity.\",\"fields\":[{\"name\":\"auditHeader\",\"type\":{\"type\":\"record\",\"name\":\"KafkaAuditHeader\",\"namespace\":\"com.linkedin.avro2pegasus.events\",\"doc\":\"Header\"}}]}"
    }
  },
  "lastModified": {
    "actor": "urn:li:corpuser:fbar",
    "time": 0
  },
  "schemaName": "FooEvent",
  "fields": [
    {
      "fieldPath": "foo",
      "description": "Bar",
      "type": {
        "type": {
          "com.linkedin.schema.StringType": {}
        }
      },
      "nativeDataType": "string"
    }
  ],
  "version": 0,
  "platform": "urn:li:dataPlatform:foo",
  "hash": ""
}

Get upstream datasets

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get' 'http://localhost:8080/datasets/($params:(),name:bar,origin:PROD,platform:urn%3Ali%3AdataPlatform%3Afoo)/upstreamLineage/0' | jq

{
  "upstreams": [
    {
      "auditStamp": {
        "actor": "urn:li:corpuser:fbar",
        "time": 0
      },
      "type": "TRANSFORMED",
      "dataset": "urn:li:dataset:(urn:li:dataPlatform:foo,barUp,PROD)"
    }
  ]
}

Get downstream datasets

curl -H 'X-RestLi-Protocol-Version:2.0.0' -H 'X-RestLi-Method: get' 'http://localhost:8080/datasets/($params:(),name:barUp,origin:PROD,platform:urn%3Ali%3AdataPlatform%3Afoo)/downstreamLineage' | jq

{
  "downstreams": [
    {
      "type": "TRANSFORMED",
      "auditStamp": {
        "actor": "urn:li:corpuser:fbar",
        "time": 0
      },
      "dataset": "urn:li:dataset:(urn:li:dataPlatform:foo,bar,PROD)"
    }
  ]
}