Configuring logging is covered  Deploying Logging page.

Logging

YOUnite Uses Elastic

YOUnite uses the Open Source Elastic Stack (https://www.elastic.co/products) to log (Logstash), search (Elasticsearch), analyze and visualize (Kibana) all API requests and message bus traffic (most notably all data events).

YOUnite logs directly to Elastic via Elastic's RESTtful API.

All activity is logged asynchronously. If Elastic is down, calls to the API fail with forbidden (403) errors. Once Elastic is available again, API functionality returns. In a production environment it is strongly recommended that Elastic is run as a highly-available, three-node cluster.

This page explains events that are logged and the fields and data values used in logging. As a YOUnite user, you can perform searches on requests and data events across the entire MDM ecosystem from a single dashboard.

Why Centralized Logging?

Having a centralized logging platform is critical in an MDM ecosystem because from a single dashboard, it allows:

• API consumers to debug and validate requests/responses

• Data Governance Stewards, DBAs, and similar data-focused staff to trace data origins and updates

• IT staff to track usage

What Gets Logged?

• All API requests made to YOUnite

• All data events:

  • API requests made to the /drs endpoint

    • Callbacks generated by POST /drs/uuid/assembler 

  • Data events generated by adaptors

  • Data event routing to adaptors

  • Data event assembling

• Adaptor initialization

For a complete listing of what gets logged, the fields used including the data values that are used for specific fields - see the Logging Entries and Fields section below

IMPORTANT: Although YOUnite centrally logs all API requests and data events – for security reasons – it does NOT log the data payloads.

Kibana

There are two logging links in the upper right of the YOUnite UI header:

Open

• The first link takes the user to the Kibana Discover page where a user can filter and search on log entries based on "fields" (see Logging Entries and Fields) below.

• The second link takes the user to a Kibana dashboard customized for YOUnite.

Kibana Discover Page

All MDM events are logged using the fields defined in the Logging Entries and Fields section below. 

Open

Kibana uses Lucene's query syntax in the search bar. Once you set the desired Time Range in the upper right corner you can query the central logs for MDM activity (go here for more on how to use the Discover Page).   Following are some examples:

To see all GET data events on an adaptor with the UUID dd6e0bc6-b385-4c3b-b645-85ccd87c47e6:

To trace a given data record (DR) with the UUID 621a5a25-e95a-475a-abbc-865da254522a:

To get all requests to the "/api/domains/*/versions" API endpoint and endpoints beneath it:

Get all data events that attempted to generate new data records (the second example shows only the data events that succeeded):

Same as above but  restricted to a domain version (with UUID d8970cb7-bd6f-4371-8d66-9a66fc81d97f):

Same as above but restricted to a given adaptor (with adaptor UUID 64c30e62-b363-4913-9e0a-0e6219b69eee)

Kibana Dashboard

Open

Logging Entries and Fields

The table below is a summary of the MDM events and the values, or "fields," that get logged for each MDM event.

The following is a description of possible log entry data values:

REQUIRED

These required values are used to index log entries:

• request-type: Requests are either directly related to DATA or other operational events designated as METADATA. See the request-type list.

• resource-type: The API resource type as defined by the API endpoint. See the resource-type list.

• zone-uuid: UUID of the zone to which the resource belongs. For API requests, the UUID of the zone the resource belongs to. For adaptor or message bus requests, it's the UUID of the zone that owns the resource that generated the event.

• hostname: The hostname of the server handling and logging the request.

• entry-type: A general classification of for log entry types. See the #entry-type list.

• timestamp: Timestamp of the event.

OPTIONAL

• method: The API method type called. See the #method list.

• log-entry-type: Classification of log entry types. See the #log-entry-type list.

• request: The URI of the API request.

• network-address: The network address of the server handling and logging the request.

• ssoid: The API consumer's single sign-on ID.

• auth-identity-uuid: The UUID of the API consumer (tied to the ssoid). Note that a single auth-identity can be tied to multiple zone users.

• http-status: The HTTP status code of the API request.

• data-event-sequence: Federated data events go through a sequence of one or more of these steps:

  • Originating data event

  • Routing data events to adaptors

  • Receiving responses from adaptors for routed data events

  • Assembling responses 

• dr-notification-uuid: The UUID of the assembler object. An assembler object is created for requests that pull data from one or more adaptors.

• data-event-uuid: When it needs to assemble data, a single originating data-event typically generates multiple data-events, each with its own "data-event-uuid", for all appropriate adaptors.

• source-adaptor-uuid: The adaptor from which a data-event originated.

• destination-adaptor-uuid: The adaptor to which a data-event is sent.

• adaptor-capabilities: A list of the adaptor's domain version property-processing capabilities.

• adaptor-state: The adaptor's state. See the #adaptor-state list.

• domain-version-uuid: The domain version specified by a data event.

• resource-uuid: The UUID of the resource the request is operating on.

• request-uuid: API requests are given a random request UUID.

• gold-adaptor-uuids: A list of adaptors designated as "gold" in the data request.

• silver-adaptor-uuids: A list of adaptors designated as "silver" in the data request.

• status: Status for a non-HTTP event. See the #status list.

• message: Typically, but not limited to, an error message.

The values on the left table below are used to index log entries and are required. The right table below shows which values are logged for the various MDM events.