Replace xvfb with headless browser (#24904) (#25150)

* Replace xvfb with headless browser

* Update karma to run in headless chrome

Update Karma tests for an option to run chrome in headless.

* Fix lint issues

* Fix spaces

tasks/config/karma.js

@@ -18,7 +18,6 @@
  */
 
 import { resolve, dirname } from 'path';
-import { platform as getOsPlatform } from 'os';
 import { times } from 'lodash';
 
 const TOTAL_CI_SHARDS = 4;
@@ -29,13 +28,10 @@ module.exports = function (grunt) {
     if (grunt.option('browser')) {
       return grunt.option('browser');
     }
-
+    if (process.env.TEST_BROWSER_HEADLESS) {
-    switch (getOsPlatform()) {
+      return 'Chrome_Headless';
-      case 'win32':
-        return 'Chrome';
-      default:
-        return 'Chrome';
     }
+    return 'Chrome';
   }
 
   const config = {
@@ -51,6 +47,16 @@ module.exports = function (grunt) {
       logLevel: grunt.option('debug') || grunt.option('verbose') ? 'DEBUG' : 'INFO',
       autoWatch: false,
       browsers: [pickBrowser()],
+      customLaunchers: {
+        Chrome_Headless: {
+          base: 'Chrome',
+          flags: [
+            '--headless',
+            '--disable-gpu',
+            '--remote-debugging-port=9222',
+          ],
+        },
+      },
 
       // available reporters: https://npmjs.org/browse/keyword/karma-reporter
       reporters: process.env.CI ? ['dots', 'junit'] : ['progress'],

test/scripts/jenkins_cloud.sh

@@ -22,4 +22,5 @@ set -e
 
 source "$(dirname $0)/../../src/dev/ci_setup/setup.sh"
 
-xvfb-run node scripts/functional_test_runner --debug --exclude-tag skipCloud $@
+TEST_BROWSER_HEADLESS=1
+node scripts/functional_test_runner --debug --exclude-tag skipCloud $@

test/scripts/jenkins_selenium.sh

@@ -7,5 +7,6 @@ source "$(dirname $0)/../../src/dev/ci_setup/java_setup.sh"
 
 node scripts/build --release --debug --oss;
 
+export TEST_BROWSER_HEADLESS=1
 export TEST_ES_FROM=${TEST_ES_FROM:-source}
-xvfb-run "$(FORCE_COLOR=0 yarn bin)/grunt" jenkins:selenium --from=source;
+"$(FORCE_COLOR=0 yarn bin)/grunt" jenkins:selenium --from=source;

test/scripts/jenkins_unit.sh

@@ -5,5 +5,6 @@ source "$(dirname $0)/../../src/dev/ci_setup/setup.sh"
 source "$(dirname $0)/../../src/dev/ci_setup/git_setup.sh"
 source "$(dirname $0)/../../src/dev/ci_setup/java_setup.sh"
 
+export TEST_BROWSER_HEADLESS=1
 export TEST_ES_FROM=${TEST_ES_FROM:-source}
-xvfb-run "$(FORCE_COLOR=0 yarn bin)/grunt" jenkins:unit --from=source;
+"$(FORCE_COLOR=0 yarn bin)/grunt" jenkins:unit --from=source;

test/scripts/jenkins_xpack.sh

@@ -7,14 +7,14 @@ source "$(dirname $0)/../../src/dev/ci_setup/setup.sh"
 source "$(dirname $0)/../../src/dev/ci_setup/git_setup.sh"
 source "$(dirname $0)/../../src/dev/ci_setup/java_setup.sh"
 
-
+export TEST_BROWSER_HEADLESS=1
 export XPACK_DIR="$(cd "$(dirname "$0")/../../x-pack"; pwd)"
 echo "-> XPACK_DIR ${XPACK_DIR}"
 
 
 echo " -> Running mocha tests"
 cd "$XPACK_DIR"
-xvfb-run yarn test
+yarn test
 echo ""
 echo ""
 
@@ -37,6 +37,6 @@ tar -xzf "$linuxBuild" -C "$installDir" --strip=1
 export TEST_ES_FROM=${TEST_ES_FROM:-source}
 echo " -> Running functional and api tests"
 cd "$XPACK_DIR"
-xvfb-run node scripts/functional_tests --debug --bail --kibana-install-dir "$installDir"
+node scripts/functional_tests --debug --bail --kibana-install-dir "$installDir"
 echo ""
 echo ""