feat(xo-server/workers): expose options in config

packages/xo-server/config.toml

@@ -108,5 +108,11 @@ timeout = 600e3
 # see https:#github.com/vatesfr/xen-orchestra/issues/3419
 # useSudo = false
 
+
+# https://github.com/facebook/jest/blob/master/packages/jest-worker/README.md#options-object-optional
+#
+#[workerOptions]
+#numWorkers = 2
+
 [xapiOptions]
 maxUncoalescedVdis = 1

packages/xo-server/src/xo-mixins/workers/index.js

@@ -9,7 +9,10 @@ export default class Workers {
     app.on('start', () => {
       process.env.XO_CONFIG = JSON.stringify(config)
 
-      this._worker = new Worker(require.resolve('./worker'))
+      this._worker = new Worker(
+        require.resolve('./worker'),
+        config.workerOptions
+      )
     })
     app.on('stop', () => this._worker.end())
   }