Support running Artillery in serverless environment

[bchrobot]

Add documentation and support for running on AWS Lambda.

Serverless execution now has first-class support in Artillery and is a more accurate load test than running from a local development machine.

https://www.artillery.io/docs/load-testing-at-scale/aws-lambda

[bchrobot]

Encountering issues running on lamba

First was a bundle size issue. Unzipped function > 250 MB.

This was addressed by forcing resolution of dependencies to later versions (includes attempted fix for two live issues):

diff --git a/package.json b/package.json
index c005b79..bdd1a62 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,8 @@
     "artillery": "artillery"
   },
   "dependencies": {
-    "artillery": "^2.0.0-33",
+    "@artilleryio/platform-fargate": "^1.0.7",
+    "artillery": "^2.0.0-34",
     "artillery-plugin-metrics-by-endpoint": "^1.2.0",
     "csv-parse": "^5.4.0",
     "csv-stringify": "^6.4.0",
@@ -21,7 +22,13 @@
     "lodash": "^4.17.21",
     "papaparse": "^5.4.1",
     "pg": "^8.11.0",
+    "protobufjs": "^7.2.4",
     "puppeteer": "^20.7.1",
     "superagent": "^8.0.9"
+  },
+  "resolutions": {
+    "@artilleryio/platform-fargate": "^1.0.7",
+    "@aws-sdk/credential-providers": "^3.370.0",
+    "@artilleryio/sketches-js": "2.1.0"
   }
 }

Error: Cannot find module 'protobufjs/minimal'

  stdout: 'Test run id: tnyqj_jf7mp6ekp8atmb8m5ecp5txngjtnm_md4w\n' +
    'Phase started: Spike - Spoke Autosending @ 100 (index: 0, duration: 60s) 13:11:18(+0000)\n' +
    '\n' +
    "worker error, id: 1 Error: Cannot find module 'protobufjs/minimal'\n" +
    'Require stack:\n' +
    '- /var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/proto/compiled.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/DDSketch.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/index.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/index.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@artilleryio/int-core/lib/ssms.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@artilleryio/int-core/index.js\n' +
    '- /var/task/node_modules/artillery/lib/artillery-global.js\n' +
    '- /var/task/node_modules/artillery/lib/platform/local/worker.js\n' +
    '    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:1026:15)\n' +
    '    at Function.Module._load (node:internal/modules/cjs/loader:871:27)\n' +
    '    at Module.require (node:internal/modules/cjs/loader:1098:19)\n' +
    '    at require (node:internal/modules/cjs/helpers:108:18)\n' +
    '    at Object.<anonymous> (/var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/proto/compiled.js:3:17)\n' +
    '    at Module._compile (node:internal/modules/cjs/loader:1196:14)\n' +
    '    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1250:10)\n' +
    '    at Module.load (node:internal/modules/cjs/loader:1074:32)\n' +
    '    at Function.Module._load (node:internal/modules/cjs/loader:909:12)\n' +
    '    at Module.require (node:internal/modules/cjs/loader:1098:19) {\n' +
    "  code: 'MODULE_NOT_FOUND',\n" +
    '  requireStack: [\n' +
    "    '/var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/proto/compiled.js',\n" +
    "    '/var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/DDSketch.js',\n" +
    "    '/var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/ddsketch/index.js',\n" +
    "    '/var/task/node_modules/artillery/node_modules/@artilleryio/sketches-js/dist/index.js',\n" +
    "    '/var/task/node_modules/artillery/node_modules/@artilleryio/int-core/lib/ssms.js',\n" +
    "    '/var/task/node_modules/artillery/node_modules/@artilleryio/int-core/index.js',\n" +
    "    '/var/task/node_modules/artillery/lib/artillery-global.js',\n" +
    "    '/var/task/node_modules/artillery/lib/platform/local/worker.js'\n" +
    '  ]\n' +
    '}\n',

Error Plugin: artillery: Cannot find module '@artilleryio/platform-fargate'

  stderr: "(node:24) [MODULE_NOT_FOUND] Error Plugin: artillery: Cannot find module '@artilleryio/platform-fargate'\n" +
    'Require stack:\n' +
    '- /var/task/node_modules/artillery/lib/cmds/run-fargate.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@oclif/config/lib/plugin.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@oclif/config/lib/config.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@oclif/config/lib/index.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@oclif/command/lib/command.js\n' +
    '- /var/task/node_modules/artillery/node_modules/@oclif/command/lib/index.js\n' +
    '- /var/task/node_modules/artillery/bin/run\n' +
    'module: @oclif/config@1.18.12\n' +
    'task: toCached\n' +
    'plugin: artillery\n' +
    'root: /var/task/node_modules/artillery\n' +
    'See more details with DEBUG=*\n' +
    '(Use `node --trace-warnings ...` to show where the warning was created)\n'