deprecate serverless mini agent (#5751)

Author: duncanpharvey

packages/dd-trace/src/proxy.js

@@ -152,10 +152,6 @@ class Tracer extends NoopProxy {
         }
       }
 
-      if (config.isGCPFunction || config.isAzureFunction) {
-        require('./serverless').maybeStartServerlessMiniAgent(config)
-      }
-
       if (config.profiling.enabled !== 'false') {
         const { SSIHeuristics } = require('./profiling/ssi-heuristics')
         const ssiHeuristics = new SSIHeuristics(config)

packages/dd-trace/src/serverless.js

@@ -1,51 +1,5 @@
 'use strict'
 
-const log = require('./log')
-
-function maybeStartServerlessMiniAgent (config) {
-  if (process.platform !== 'win32' && process.platform !== 'linux') {
-    log.error('Serverless Mini Agent is only supported on Windows and Linux.')
-    return
-  }
-
-  const rustBinaryPath = getRustBinaryPath(config)
-
-  const fs = require('fs')
-
-  log.debug(`Trying to spawn the Serverless Mini Agent at path: ${rustBinaryPath}`)
-
-  // trying to spawn with an invalid path will return a non-descriptive error, so we want to catch
-  // invalid paths and log our own error.
-  if (!fs.existsSync(rustBinaryPath)) {
-    log.error('Serverless Mini Agent did not start. Could not find mini agent binary.')
-    return
-  }
-  try {
-    require('child_process').spawn(rustBinaryPath, { stdio: 'inherit' })
-  } catch (err) {
-    log.error('Error spawning mini agent process: %s', err.message)
-  }
-}
-
-function getRustBinaryPath (config) {
-  if (process.env.DD_MINI_AGENT_PATH !== undefined) {
-    return process.env.DD_MINI_AGENT_PATH
-  }
-
-  const rustBinaryPathRoot = config.isGCPFunction ? '/workspace' : '/home/site/wwwroot'
-  const rustBinaryPathOsFolder = process.platform === 'win32'
-    ? 'datadog-serverless-agent-windows-amd64'
-    : 'datadog-serverless-agent-linux-amd64'
-
-  const rustBinaryExtension = process.platform === 'win32' ? '.exe' : ''
-
-  const rustBinaryPath =
-    `${rustBinaryPathRoot}/node_modules/@datadog/sma/${rustBinaryPathOsFolder}/\
-datadog-serverless-trace-mini-agent${rustBinaryExtension}`
-
-  return rustBinaryPath
-}
-
 function getIsGCPFunction () {
   const isDeprecatedGCPFunction = process.env.FUNCTION_NAME !== undefined && process.env.GCP_PROJECT !== undefined
   const isNewerGCPFunction = process.env.K_SERVICE !== undefined && process.env.FUNCTION_TARGET !== undefined
@@ -69,9 +23,7 @@ function isInServerlessEnvironment () {
 }
 
 module.exports = {
-  maybeStartServerlessMiniAgent,
   getIsGCPFunction,
   getIsAzureFunction,
-  getRustBinaryPath,
   isInServerlessEnvironment
 }