Add Okta module documentation, config cleanup, _id field

[andrewkroh]

What does this PR do?

This add documentation for the Okta module. It contains descriptions of the
configuration options and general information about the module.

I fixed an issue with the module where it was not setting the _id field for Elasticsearch events.

I also did some cleanup to the pipeline.js (indentation, semi-colons, strict equality checks).

The module's manifest was updated to not duplicate httpjson's default values.

The module was accepting configuration as JSON strings for some parameters (http_headers, http_request_body, pagination, rate_limit, ssl) which is inconsistent with how other parts of Beats are configured so I removed this. Now these options expect regular YAML objects for values. None of these options are required to use the module so the impact to users should be minimal.

Why is it important?

Documentation is required for users to know how to use the module.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Logs

I ran the module against the Okta API to test. You'll note that the @metadata._id field is now set which libbeat will use when writing the data to Elasticsearch.

{
  "@timestamp": "2020-06-03T18:10:38.118Z",
  "@metadata": {
    "beat": "filebeat",
    "type": "_doc",
    "version": "8.0.0",
    "pipeline": "filebeat-8.0.0-okta-system-pipeline",
    "_id": "870da4d0-a5c5-11ea-a40a-5d8cbb5cdb88"
  },
  "input": {
    "type": "httpjson"
  },
  "fileset": {
    "name": "system"
  },
  "client": {
    "user": {
      "full_name": "Andrew Kroh",
      "id": "00ue26zi9EdhopJgw4x6"
    },
    "geo": {
      "region_name": "Virginia",
      "country_name": "United States",
      "location": {
        "lat": 38.9637,
        "lon": -77.6099
      },
      "city_name": "Aldie"
    },
    "ip": "198.51.100.1",
    "as": {
      "number": 701,
      "organization": {
        "name": "verizon"
      }
    },
    "domain": "verizon.net"
  },
  "user_agent": {
    "original": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:76.0) Gecko/20100101 Firefox/76.0"
  },
  "source": {
    "ip": "198.51.100.1",
    "domain": "verizon.net",
    "user": {
      "full_name": "Andrew Kroh",
      "id": "00ue26zi9EdhopJgw4x6"
    }
  },
  "ecs": {
    "version": "1.5.0"
  },
  "event": {
    "category": [
      "authentication"
    ],
    "action": "system.api_token.create",
    "id": "870da4d0-a5c5-11ea-a40a-5d8cbb5cdb88",
    "kind": "event",
    "module": "okta",
    "dataset": "okta.system",
    "original": "{\"actor\":{\"alternateId\":\"id-okta@test.com\",\"detailEntry\":null,\"displayName\":\"Andrew Kroh\",\"id\":\"00ue26zi9EdhopJgw4x6\",\"type\":\"User\"},\"authenticationContext\":{\"authenticationProvider\":null,\"authenticationStep\":0,\"credentialProvider\":null,\"credentialType\":null,\"externalSessionId\":\"102NKlIOnToQGGOboI6cpvgYQ\",\"interface\":null,\"issuer\":null},\"client\":{\"device\":\"Computer\",\"geographicalContext\":{\"city\":\"Aldie\",\"country\":\"United States\",\"geolocation\":{\"lat\":38.9637,\"lon\":-77.6099},\"postalCode\":\"20105\",\"state\":\"Virginia\"},\"id\":null,\"ipAddress\":\"198.51.100.1\",\"userAgent\":{\"browser\":\"FIREFOX\",\"os\":\"Mac OS X\",\"rawUserAgent\":\"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:76.0) Gecko/20100101 Firefox/76.0\"},\"zone\":\"null\"},\"debugContext\":{\"debugData\":{\"requestId\":\"XtfnnhZLAtrLPbdLtrp-4AAABw4\",\"requestUri\":\"/api/internal/tokens\",\"threatSuspected\":\"false\",\"url\":\"/api/internal/tokens?expand=user\"}},\"displayMessage\":\"Create API token\",\"eventType\":\"system.api_token.create\",\"legacyEventType\":\"api.token.create\",\"outcome\":{\"reason\":null,\"result\":\"SUCCESS\"},\"published\":\"2020-06-03T18:10:38.118Z\",\"request\":{\"ipChain\":[{\"geographicalContext\":{\"city\":\"Aldie\",\"country\":\"United States\",\"geolocation\":{\"lat\":38.9637,\"lon\":-77.6099},\"postalCode\":\"20105\",\"state\":\"Virginia\"},\"ip\":\"198.51.100.1\",\"source\":null,\"version\":\"V4\"}]},\"securityContext\":{\"asNumber\":701,\"asOrg\":\"verizon\",\"domain\":\"verizon.net\",\"isProxy\":false,\"isp\":\"mci communications services  inc. d/b/a verizon business\"},\"severity\":\"INFO\",\"target\":[{\"alternateId\":\"unknown\",\"detailEntry\":null,\"displayName\":\"filebeat\",\"id\":\"00Tt0pmrpvAs7CHYL4x5\",\"type\":\"Token\"}],\"transaction\":{\"detail\":{},\"id\":\"XtfnnhZLAtrLPbdLtrp-4AAABw4\",\"type\":\"WEB\"},\"uuid\":\"870da4d0-a5c5-11ea-a40a-5d8cbb5cdb88\",\"version\":\"0\"}",
    "type": [
      "access"
    ],
    "outcome": "success",
    "created": "2020-06-03T18:12:23.908Z"
  },
  "okta": {
    "event_type": "system.api_token.create",
    "client": {
      "device": "Computer",
      "ip": "198.51.100.1",
      "user_agent": {
        "os": "Mac OS X",
        "raw_user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:76.0) Gecko/20100101 Firefox/76.0",
        "browser": "FIREFOX"
      },
      "zone": "null"
    },
    "authentication_context": {
      "external_session_id": "102NKlIOnToQGGOboI6cpvgYQ",
      "authentication_step": 0
    },
    "display_message": "Create API token",
    "uuid": "870da4d0-a5c5-11ea-a40a-5d8cbb5cdb88",
    "actor": {
      "display_name": "Andrew Kroh",
      "id": "00ue26zi9EdhopJgw4x6",
      "type": "User",
      "alternate_id": "id-okta@test.com"
    },
    "outcome": {
      "result": "SUCCESS"
    },
    "target": [
      {
        "type": "Token",
        "alternate_id": "unknown",
        "display_name": "filebeat",
        "id": "00Tt0pmrpvAs7CHYL4x5"
      }
    ],
    "transaction": {
      "id": "XtfnnhZLAtrLPbdLtrp-4AAABw4",
      "type": "WEB"
    },
    "debug_context": {
      "debug_data": {
        "request_id": "XtfnnhZLAtrLPbdLtrp-4AAABw4",
        "request_uri": "/api/internal/tokens",
        "threat_suspected": "false",
        "url": "/api/internal/tokens?expand=user"
      }
    },
    "security_context": {
      "as": {
        "number": 701,
        "organization": {
          "name": "verizon"
        }
      },
      "domain": "verizon.net",
      "is_proxy": false,
      "isp": "mci communications services  inc. d/b/a verizon business"
    }
  },
  "tags": [
    "forwarded"
  ],
  "service": {
    "type": "okta"
  },
  "agent": {
    "ephemeral_id": "9cd78eb3-acb9-4da6-95a3-7484450a5ad9",
    "id": "1ee8bc3e-9e78-4384-b771-a5655904db72",
    "name": "mac15.example.com",
    "type": "filebeat",
    "version": "8.0.0"
  },
  "related": {
    "user": "Andrew Kroh",
    "ip": "198.51.100.1"
  }
}

[elasticmachine]

Pinging @elastic/siem (Team:SIEM)

[elasticmachine]

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Build stats

• Build Cause: [andrewkroh commented: run tests]

• Start Time: 2020-06-03T22:32:00.048+0000

• Duration: 57 min 16 sec

Test stats 🧪

Test	Results
Failed	0
Passed	3823
Skipped	672
Total	4495

[andrewkroh]

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