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[Security Solution][Detections] Extended rule execution logging to Ev…
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…ent Log (#126063)

**Epics:** #124947, #118324
**Fixes:** #131352

## Summary

Console logs written by rule executors can now be "routed" to the Event Log in addition to the console. A new table UI for viewing plain rule execution logs allows the user to look at all status changes, errors, warnings, info and debug messages on the Rule Details page.

<img width="1502" alt="Screenshot 2022-07-20 at 15 31 54" src="https://user-images.githubusercontent.com/7359339/179995075-24440224-daf9-4e73-bc62-b6ce211052b3.png">

**This feature is hidden under a feature flag and disabled by default** -- it might not be production-ready yet. We will need to work on product and UX/UI design in the subsequent development cycles to make it ready for release. Until then, we can start using it in development: it should make it easier to troubleshoot issues with rule execution. Add this flag to your Kibana config to enable this feature:

```yaml
xpack.securitySolution.enableExperimental: ['extendedRuleExecutionLoggingEnabled']
```

If the flag is enabled:

- Rules will start writing console logs to Event Log as events of a new type `message`, in addition to the existing `status-change` and `execution-metrics` events.
- Rule Details page will show a new tab called `Execution events`. This tab will contain a table with plain execution logs.
- In Stack Management, you will find two new Kibana Advanced Settings for controlling this extended logging.

As for the new Kibana Advanced Settings, by default:

- Extended logging is enabled.
- The minimum console log level to be written to Event Log is `error`. This only affects the new `message` events.

<img width="774" alt="Screenshot 2022-07-20 at 15 41 29" src="https://user-images.githubusercontent.com/7359339/179997070-d86dfc6b-3862-49ff-879d-ecc30bc128d7.png">

## Implementation details

**Important change**: refactored the folder structure as our first step to **domain-driven architecture** and **splitting the Detection Engine into subdomains**.

- Extracted most of the code related to Rule Execution Log and Rule Monitoring in general into a subdomain called `rule_monitoring`. This subdomain now lives in three folders:
  - `security_solution/common/detection_engine/rule_monitoring`
  - `security_solution/public/detection_engine/rule_monitoring`
  - `security_solution/server/lib/detection_engine/rule_monitoring`
- Tried to create a developer-friendly and clear folder structure within the subdomain.

Other changes:

- Changed all rule executors to write console logs via an instance of `IRuleExecutionLogForExecutors` instead of the console `Logger`.
  - `IRuleExecutionLogForExecutors` is passed to rule executors and downstream functions they call.
  - `Logger` is not passed anymore.
  - `buildRuleMessage` and `buildRuleMessageFactory` are deleted.
- Added support for writing console logs to Event Log.
  - Added a new rule execution event type `message` for writing console logs to Event Log.
  - Every rule execution event now has a `log.level` and `event.severity`.
- Improved the format of console logs written by rules.
  - Created a child logger for console logs of rule executors: `plugins.securitySolution.ruleExecution`.
  - Added rule static “signature” ID (`rule.rule_id`) as a correlation id to the logs.
  - Cleaned up the formatting of console logs.
  - Fixed `ExtMeta` to use interfaces instead of type intersection due to a found [bug](microsoft/TypeScript#47935) in TypeScript that affected this type.
- Made changes in the domain model.
  - Renamed the `AggregateRuleExecutionEvent` into the `RuleExecutionResult`.
  - The new plain event is called `RuleExecutionEvent`.
- Finalized the API endpoint for fetching plain execution logs.
- Built a Rule Execution Events Table UI for showing and filtering plain execution logs.
  - Did some refactoring to extract reusable components/hooks to make development of tables easier in the future.

## Execution events table UI

For context, this is how the existing `Execution logs` table looks like when the flag is off (notice the renaming to `Execution results`:

<img width="1506" alt="Screenshot 2022-07-20 at 15 29 04" src="https://user-images.githubusercontent.com/7359339/179994450-45121035-ebb0-4e6f-83c0-9cbbbbd0b598.png">

This is the new `Execution events` table when the flag is on:

<img width="1502" alt="Screenshot 2022-07-20 at 15 31 54" src="https://user-images.githubusercontent.com/7359339/179995075-24440224-daf9-4e73-bc62-b6ce211052b3.png">

Showing only trace and debug events:

<img width="1505" alt="Screenshot 2022-07-20 at 15 33 48" src="https://user-images.githubusercontent.com/7359339/179995484-d97ff7e3-2756-42db-802f-41f11bd37507.png">

Showing only status changes:

<img width="1507" alt="Screenshot 2022-07-20 at 15 35 04" src="https://user-images.githubusercontent.com/7359339/179995804-ca6808b7-3b47-411b-a74e-d141b3fd74e0.png">

Showing only warning and error `message`s:

<img width="1508" alt="Screenshot 2022-07-20 at 15 37 11" src="https://user-images.githubusercontent.com/7359339/179996258-c154b95d-642d-45a6-b19a-7185cd71f295.png">

Expanded rows showing details of the corresponding events:

<img width="1452" alt="Screenshot 2022-07-20 at 15 39 16" src="https://user-images.githubusercontent.com/7359339/179996771-3954ceea-24e9-4760-9103-2daf6cb7b528.png">

<img width="1449" alt="Screenshot 2022-07-20 at 15 39 56" src="https://user-images.githubusercontent.com/7359339/179996805-c866674d-09a1-42ec-b954-58c6829ef19b.png">

## Console logs

Example:

```
[2022-02-23T17:05:09.901+03:00][DEBUG][plugins.securitySolution.ruleExecution] [+] Starting Signal Rule execution [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:09.907+03:00][DEBUG][plugins.securitySolution.ruleExecution] interval: 5m [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:09.908+03:00][INFO ][plugins.securitySolution.ruleExecution] Changing rule status to "running" [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:10.595+03:00][WARN ][plugins.securitySolution.ruleExecution] This rule is attempting to query data from Elasticsearch indices listed in the "Index pattern" section of the rule definition, however no index matching: ["logs-endpoint.alerts-*"] was found. This warning will continue to appear until a matching index is created or this rule is de-activated. If you have recently enrolled agents enabled with Endpoint Security through Fleet, this warning should stop once an alert is sent from an agent. [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:10.595+03:00][WARN ][plugins.securitySolution.ruleExecution] Changing rule status to "partial failure" [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.630+03:00][DEBUG][plugins.securitySolution.ruleExecution] sortIds: undefined [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.634+03:00][DEBUG][plugins.securitySolution.ruleExecution] totalHits: 0 [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.634+03:00][DEBUG][plugins.securitySolution.ruleExecution] searchResult.hit.hits.length: 0 [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.635+03:00][DEBUG][plugins.securitySolution.ruleExecution] totalHits was 0, exiting early [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.636+03:00][DEBUG][plugins.securitySolution.ruleExecution] [+] completed bulk index of 0 [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.636+03:00][DEBUG][plugins.securitySolution.ruleExecution] [+] Signal Rule execution completed. [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.638+03:00][DEBUG][plugins.securitySolution.ruleExecution] [+] Finished indexing 0 signals into .alerts-security.alerts [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
[2022-02-23T17:05:11.639+03:00][DEBUG][plugins.securitySolution.ruleExecution] [+] Finished indexing 0 signals searched between date ranges [
  {
    "to": "2022-02-23T14:05:09.775Z",
    "from": "2022-02-23T13:55:09.775Z",
    "maxSignals": 10000
  }
] [siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]
```

Note that:

- The logger name is now `plugins.securitySolution.ruleExecution`, which allows to turn on _only_ rule execution logs in the config (could be useful when debugging).
- Every log message has a suffix with correlation ids: `[siem.queryRule][Endpoint Security][rule id 825b2fab-8b3e-11ec-a4a0-cf820453283c][rule uuid 9a1a2dae-0b5f-4c3d-8305-a268d404c306][exec id ebb7f713-b216-4c90-a456-6c1a6815a065][space default]`


### Checklist

- [x] Any text added follows [EUI's writing guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses sentence case text and includes [i18n support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [x] [Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html) was added for features that require explanation or tutorials
  - [x] `x-pack/plugins/security_solution/server/lib/detection_engine/rule_monitoring/logic/rule_execution_log/README.md`
  - [x] Various JSDoc comments
- [x] [Unit or functional tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html) were updated or added to match the most common scenarios
- [ ] Any UI touched in this PR is usable by keyboard only (learn more about [keyboard accessibility](https://webaim.org/techniques/keyboard/))
- [ ] Any UI touched in this PR does not create any new axe failures (run axe in browser: [FF](https://addons.mozilla.org/en-US/firefox/addon/axe-devtools/), [Chrome](https://chrome.google.com/webstore/detail/axe-web-accessibility-tes/lhdoppojpmngadmnindnejefpokejbdd?hl=en-US))
- [x] If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the [docker list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [ ] This renders correctly on smaller devices using a responsive layout. (You can test this [in your browser](https://www.browserstack.com/guide/responsive-testing-on-local-server))
- [ ] This was checked for [cross-browser compatibility](https://www.elastic.co/support/matrix#matrix_browsers)

### For maintainers

- [x] This was checked for breaking API changes and was [labeled appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)
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banderror authored Jul 25, 2022
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Original file line number Diff line number Diff line change
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/

import * as t from 'io-ts';
import { pipe } from 'fp-ts/lib/pipeable';
import { left } from 'fp-ts/lib/Either';
import { foldLeftRight, getPaths } from '@kbn/securitysolution-io-ts-utils';
import { defaultCsvArray } from '.';

describe('defaultCsvArray', () => {
describe('Creates a schema of an array that works in the following way:', () => {
type TestType = t.TypeOf<typeof TestType>;
const TestType = t.union(
[t.literal('foo'), t.literal('bar'), t.literal('42'), t.null, t.undefined],
'TestType'
);

const TestCsvArray = defaultCsvArray(TestType);

describe('Name of the schema', () => {
it('has a default value', () => {
const CsvArray = defaultCsvArray(TestType);
expect(CsvArray.name).toEqual('DefaultCsvArray<TestType>');
});

it('can be overriden', () => {
const CsvArray = defaultCsvArray(TestType, 'CustomName');
expect(CsvArray.name).toEqual('CustomName');
});
});

describe('Validation succeeds', () => {
describe('when input is a single valid string value', () => {
const cases = [{ input: 'foo' }, { input: 'bar' }, { input: '42' }];

cases.forEach(({ input }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);
const expectedOutput = [input]; // note that it's an array after decode

expect(getPaths(left(message.errors))).toEqual([]);
expect(message.schema).toEqual(expectedOutput);
});
});
});

describe('when input is an array of valid string values', () => {
const cases = [
{ input: ['foo'] },
{ input: ['foo', 'bar'] },
{ input: ['foo', 'bar', '42'] },
];

cases.forEach(({ input }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);
const expectedOutput = input;

expect(getPaths(left(message.errors))).toEqual([]);
expect(message.schema).toEqual(expectedOutput);
});
});
});

describe('when input is a string which is a comma-separated array of valid values', () => {
const cases = [
{
input: 'foo,bar',
expectedOutput: ['foo', 'bar'],
},
{
input: 'foo,bar,42',
expectedOutput: ['foo', 'bar', '42'],
},
];

cases.forEach(({ input, expectedOutput }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);

expect(getPaths(left(message.errors))).toEqual([]);
expect(message.schema).toEqual(expectedOutput);
});
});
});
});

describe('Validation fails', () => {
describe('when input is a single invalid value', () => {
const cases = [
{
input: 'val',
expectedErrors: ['Invalid value "val" supplied to "DefaultCsvArray<TestType>"'],
},
{
input: '5',
expectedErrors: ['Invalid value "5" supplied to "DefaultCsvArray<TestType>"'],
},
{
input: 5,
expectedErrors: ['Invalid value "5" supplied to "DefaultCsvArray<TestType>"'],
},
{
input: {},
expectedErrors: ['Invalid value "{}" supplied to "DefaultCsvArray<TestType>"'],
},
];

cases.forEach(({ input, expectedErrors }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);

expect(getPaths(left(message.errors))).toEqual(expectedErrors);
expect(message.schema).toEqual({});
});
});
});

describe('when input is an array of invalid values', () => {
const cases = [
{
input: ['value 1', 5],
expectedErrors: [
'Invalid value "value 1" supplied to "DefaultCsvArray<TestType>"',
'Invalid value "5" supplied to "DefaultCsvArray<TestType>"',
],
},
{
input: ['value 1', 'foo'],
expectedErrors: ['Invalid value "value 1" supplied to "DefaultCsvArray<TestType>"'],
},
{
input: ['', 5, {}],
expectedErrors: [
'Invalid value "" supplied to "DefaultCsvArray<TestType>"',
'Invalid value "5" supplied to "DefaultCsvArray<TestType>"',
'Invalid value "{}" supplied to "DefaultCsvArray<TestType>"',
],
},
];

cases.forEach(({ input, expectedErrors }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);

expect(getPaths(left(message.errors))).toEqual(expectedErrors);
expect(message.schema).toEqual({});
});
});
});

describe('when input is a string which is a comma-separated array of invalid values', () => {
const cases = [
{
input: 'value 1,5',
expectedErrors: [
'Invalid value "value 1" supplied to "DefaultCsvArray<TestType>"',
'Invalid value "5" supplied to "DefaultCsvArray<TestType>"',
],
},
{
input: 'value 1,foo',
expectedErrors: ['Invalid value "value 1" supplied to "DefaultCsvArray<TestType>"'],
},
{
input: ',5,{}',
expectedErrors: [
'Invalid value "" supplied to "DefaultCsvArray<TestType>"',
'Invalid value "5" supplied to "DefaultCsvArray<TestType>"',
'Invalid value "{}" supplied to "DefaultCsvArray<TestType>"',
],
},
];

cases.forEach(({ input, expectedErrors }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);

expect(getPaths(left(message.errors))).toEqual(expectedErrors);
expect(message.schema).toEqual({});
});
});
});
});

describe('Validation returns default value (an empty array)', () => {
describe('when input is', () => {
const cases = [{ input: null }, { input: undefined }, { input: '' }, { input: [] }];

cases.forEach(({ input }) => {
it(`${input}`, () => {
const decoded = TestCsvArray.decode(input);
const message = pipe(decoded, foldLeftRight);
const expectedOutput: string[] = [];

expect(getPaths(left(message.errors))).toEqual([]);
expect(message.schema).toEqual(expectedOutput);
});
});
});
});
});
});
Original file line number Diff line number Diff line change
@@ -0,0 +1,48 @@
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/

import * as t from 'io-ts';
import { Either } from 'fp-ts/lib/Either';

/**
* Creates a schema of an array that works in the following way:
* - If input is a CSV string, it will be parsed to an array which will be validated.
* - If input is an array, each item is validated to match `itemSchema`.
* - If input is a single string, it is validated to match `itemSchema`.
* - If input is not specified, the result will be set to [] (empty array):
* - null, undefined, empty string, empty array
*
* In all cases when an input is valid, the resulting decoded value will be an array,
* either an empty one or containing valid items.
*
* @param itemSchema Schema of the array's items.
* @param name (Optional) Name of the resulting schema.
*/
export const defaultCsvArray = <TItem>(
itemSchema: t.Type<TItem>,
name?: string
): t.Type<TItem[]> => {
return new t.Type<TItem[]>(
name ?? `DefaultCsvArray<${itemSchema.name}>`,
t.array(itemSchema).is,
(input, context): Either<t.Errors, TItem[]> => {
if (input == null) {
return t.success([]);
} else if (typeof input === 'string') {
if (input === '') {
return t.success([]);
} else {
return t.array(itemSchema).validate(input.split(','), context);
}
} else {
return t.array(itemSchema).validate(input, context);
}
},
t.identity
);
};
Original file line number Diff line number Diff line change
@@ -0,0 +1,106 @@
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/

import * as t from 'io-ts';
import { pipe } from 'fp-ts/lib/pipeable';
import { left } from 'fp-ts/lib/Either';
import { foldLeftRight, getPaths } from '@kbn/securitysolution-io-ts-utils';
import { defaultValue } from '.';

describe('defaultValue', () => {
describe('Creates a schema that sets a default value if the input value is not specified', () => {
type TestType = t.TypeOf<typeof TestType>;
const TestType = t.union([t.string, t.number, t.null, t.undefined], 'TestType');

const DefaultValue = defaultValue(TestType, 42);

describe('Name of the schema', () => {
it('has a default value', () => {
expect(defaultValue(TestType, 42).name).toEqual('DefaultValue<TestType>');
});

it('can be overriden', () => {
expect(defaultValue(TestType, 42, 'CustomName').name).toEqual('CustomName');
});
});

describe('Validation succeeds', () => {
describe('when input is a valid value', () => {
const cases = [
{ input: 'foo' },
{ input: '42' },
{ input: 42 },
// including all "falsey" values which are not null or undefined
{ input: '' },
{ input: 0 },
];

cases.forEach(({ input }) => {
it(`${input}`, () => {
const decoded = DefaultValue.decode(input);
const message = pipe(decoded, foldLeftRight);
const expectedOutput = input;

expect(getPaths(left(message.errors))).toEqual([]);
expect(message.schema).toEqual(expectedOutput);
});
});
});
});

describe('Validation fails', () => {
describe('when input is an invalid value', () => {
const cases = [
{
input: {},
expectedErrors: ['Invalid value "{}" supplied to "DefaultValue<TestType>"'],
},
{
input: { foo: 42 },
expectedErrors: ['Invalid value "{"foo":42}" supplied to "DefaultValue<TestType>"'],
},
{
input: [],
expectedErrors: ['Invalid value "[]" supplied to "DefaultValue<TestType>"'],
},
{
input: ['foo', 42],
expectedErrors: ['Invalid value "["foo",42]" supplied to "DefaultValue<TestType>"'],
},
];

cases.forEach(({ input, expectedErrors }) => {
it(`${input}`, () => {
const decoded = DefaultValue.decode(input);
const message = pipe(decoded, foldLeftRight);

expect(getPaths(left(message.errors))).toEqual(expectedErrors);
expect(message.schema).toEqual({});
});
});
});
});

describe('Validation returns specified default value', () => {
describe('when input is', () => {
const cases = [{ input: null }, { input: undefined }];

cases.forEach(({ input }) => {
it(`${input}`, () => {
const decoded = DefaultValue.decode(input);
const message = pipe(decoded, foldLeftRight);
const expectedOutput = 42;

expect(getPaths(left(message.errors))).toEqual([]);
expect(message.schema).toEqual(expectedOutput);
});
});
});
});
});
});
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