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resolver_generator.ts
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resolver_generator.ts
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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;
* you may not use this file except in compliance with the Elastic License.
*/
import * as yargs from 'yargs';
import seedrandom from 'seedrandom';
import { Client, ClientOptions } from '@elastic/elasticsearch';
import { ResponseError } from '@elastic/elasticsearch/lib/errors';
import { EndpointDocGenerator, Event } from '../common/generate_data';
import { default as eventMapping } from './event_mapping.json';
import { default as alertMapping } from './alert_mapping.json';
main();
async function main() {
const argv = yargs.help().options({
seed: {
alias: 's',
describe: 'random seed to use for document generator',
type: 'string',
},
node: {
alias: 'n',
describe: 'elasticsearch node url',
default: 'http://localhost:9200',
type: 'string',
},
alertIndex: {
alias: 'ai',
describe: 'index to store alerts in',
default: '.alerts-endpoint-000001',
type: 'string',
},
eventIndex: {
alias: 'ei',
describe: 'index to store events in',
default: 'events-endpoint-1',
type: 'string',
},
metadataIndex: {
alias: 'mi',
describe: 'index to store host metadata in',
default: 'endpoint-agent-1',
type: 'string',
},
auth: {
describe: 'elasticsearch username and password, separated by a colon',
type: 'string',
},
ancestors: {
alias: 'anc',
describe: 'number of ancestors of origin to create',
type: 'number',
default: 3,
},
generations: {
alias: 'gen',
describe: 'number of child generations to create',
type: 'number',
default: 3,
},
children: {
alias: 'ch',
describe: 'maximum number of children per node',
type: 'number',
default: 3,
},
relatedEvents: {
alias: 'related',
describe: 'number of related events to create for each process event',
type: 'number',
default: 5,
},
percentWithRelated: {
alias: 'pr',
describe: 'percent of process events to add related events to',
type: 'number',
default: 30,
},
percentTerminated: {
alias: 'pt',
describe: 'percent of process events to add termination event for',
type: 'number',
default: 30,
},
numHosts: {
alias: 'ne',
describe: 'number of different hosts to generate alerts for',
type: 'number',
default: 1,
},
alertsPerHost: {
alias: 'ape',
describe: 'number of resolver trees to make for each host',
type: 'number',
default: 1,
},
delete: {
alias: 'd',
describe: 'delete indices and remake them',
type: 'boolean',
default: false,
},
setupOnly: {
alias: 'so',
describe:
'Run only the index and pipeline creation then exit. This is intended to be used to set up the Endpoint App for use with the real Elastic Endpoint.',
type: 'boolean',
default: false,
},
}).argv;
const pipelineName = 'endpoint-event-pipeline';
eventMapping.settings.index.default_pipeline = pipelineName;
const clientOptions: ClientOptions = {
node: argv.node,
};
if (argv.auth) {
const [username, password]: string[] = argv.auth.split(':', 2);
clientOptions.auth = { username, password };
}
const client = new Client(clientOptions);
if (argv.delete) {
try {
await client.indices.delete({
index: [argv.eventIndex, argv.metadataIndex, argv.alertIndex],
});
} catch (err) {
if (err instanceof ResponseError && err.statusCode !== 404) {
// eslint-disable-next-line no-console
console.log(err);
process.exit(1);
}
}
}
const pipeline = {
description: 'redirects alerts to their own index',
processors: [
{
set: {
field: '_index',
value: argv.alertIndex,
if: "ctx.event.kind == 'alert'",
},
},
{
set: {
field: 'mutable_state.triage_status',
value: 'open',
},
},
],
};
try {
await client.ingest.putPipeline({
id: pipelineName,
body: pipeline,
});
} catch (err) {
// eslint-disable-next-line no-console
console.log(err);
process.exit(1);
}
await createIndex(client, argv.alertIndex, alertMapping);
await createIndex(client, argv.eventIndex, eventMapping);
if (argv.setupOnly) {
process.exit(0);
}
let seed = argv.seed;
if (!seed) {
seed = Math.random().toString();
// eslint-disable-next-line no-console
console.log('No seed supplied, using random seed: ' + seed);
}
const random = seedrandom(seed);
for (let i = 0; i < argv.numHosts; i++) {
const generator = new EndpointDocGenerator(random);
const timeBetweenDocs = 6 * 3600 * 1000; // 6 hours between metadata documents
const numMetadataDocs = 5;
const timestamp = new Date().getTime();
for (let j = 0; j < numMetadataDocs; j++) {
generator.updateHostData();
await client.index({
index: argv.metadataIndex,
body: generator.generateHostMetadata(
timestamp - timeBetweenDocs * (numMetadataDocs - j - 1)
),
});
}
for (let j = 0; j < argv.alertsPerHost; j++) {
const resolverDocGenerator = generator.fullResolverTreeGenerator(
argv.ancestors,
argv.generations,
argv.children,
argv.relatedEvents,
argv.percentWithRelated,
argv.percentTerminated
);
let result = resolverDocGenerator.next();
while (!result.done) {
let k = 0;
const resolverDocs: Event[] = [];
while (k < 1000 && !result.done) {
resolverDocs.push(result.value);
result = resolverDocGenerator.next();
k++;
}
const body = resolverDocs.reduce(
(array: Array<Record<string, any>>, doc) => (
array.push({ index: { _index: argv.eventIndex } }, doc), array
),
[]
);
await client.bulk({ body });
}
}
}
}
async function createIndex(client: Client, index: string, mapping: any) {
try {
await client.indices.create({
index,
body: mapping,
});
} catch (err) {
if (
err instanceof ResponseError &&
err.body.error.type !== 'resource_already_exists_exception'
) {
// eslint-disable-next-line no-console
console.log(err.body);
process.exit(1);
}
}
}