如何在Alpine Linux上运行Angular6 E2E测试

Question

在尝试使用Alpine Linux运行E2E测试时，我们遇到以下神秘错误：

E/launcher - spawn (...)/selenium/chromedriver_2.40 ENOENT

如何繁殖

docker run -it --name my-alpine --rm alpine:latest /bin/ash
apk add --update nodejs nodejs-npm chromium \
    && export CHROME_BIN=/usr/bin/chromium-browser

npm install -g @angular/cli
ng new testAlpine
cd testAlpine
ng e2e

结果

[14:10:54] I/file_manager - creating folder /testAlpine/node_modules/protractor/node_modules/webdriver-manager/selenium
? ?wdm?: Compiled successfully.
[14:10:54] I/update - chromedriver: unzipping chromedriver_2.40.zip
[14:10:55] I/update - chromedriver: setting permissions to 0755 for /testAlpine/node_modules/protractor/node_modules/webdriver-manager/selenium/chromedriver_2.40
(node:121) [DEP0022] DeprecationWarning: os.tmpDir() is deprecated. Use os.tmpdir() instead.
[14:10:55] I/launcher - Running 1 instances of WebDriver
[14:10:55] I/direct - Using ChromeDriver directly...
[14:10:55] E/launcher - spawn /testAlpine/node_modules/protractor/node_modules/webdriver-manager/selenium/chromedriver_2.40 ENOENT
[14:10:55] E/launcher - Error: spawn /testAlpine/node_modules/protractor/node_modules/webdriver-manager/selenium/chromedriver_2.40 ENOENT
    at _errnoException (util.js:1024:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:190:19)
    at onErrorNT (internal/child_process.js:372:16)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)
[14:10:55] E/launcher - Process exited with error code 199
An unexpected error occured: undefined

一些调查细节

假设量角器使用Nodejs spawn function，我们尝试从ash运行该命令，结果是一条“未找到”消息！对其进行深入研究发现，这可能与缺少动态链接库有关。

为了验证该假设，我们安装了binutils来检查动态链接依赖性。

apk add --update binutils
readelf -l /testAlpine/node_modules/protractor/node_modules/webdriver-manager/selenium/chromedriver_2.40

结果表明，Alpine Linux中不存在这种依赖关系，

/lib64/ld-linux-x86-64.so.2

Elf file type is EXEC (Executable file)
Entry point 0x490000
There are 11 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  PHDR           0x0000000000000040 0x0000000000200040 0x0000000000200040
                 0x0000000000000268 0x0000000000000268  R      0x8
  INTERP         0x00000000000002a8 0x00000000002002a8 0x00000000002002a8
                 0x000000000000001c 0x000000000000001c  R      0x1
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
  LOAD           0x0000000000000000 0x0000000000200000 0x0000000000200000
                 0x000000000028f27c 0x000000000028f27c  R      0x1000
  LOAD           0x0000000000290000 0x0000000000490000 0x0000000000490000

尝试使用webdriver-manager获取更新的chrome驱动程序版本不起作用。下载的版本具有相同的问题。

npm install -g webdriver-manager

webdriver-manager update
webdriver-manager: using global installed version 12.0.6
[14:30:20] I/file_manager - creating folder /usr/lib/node_modules/webdriver-manager/selenium
[14:30:21] I/update - chromedriver: unzipping chromedriver_2.40.zip
[14:30:21] I/update - chromedriver: setting permissions to 0755 for /usr/lib/node_modules/webdriver-manager/selenium/chromedriver_2.40

/testAlpine # /usr/lib/node_modules/webdriver-manager/selenium/chromedriver_2.40
/bin/ash: /usr/lib/node_modules/webdriver-manager/selenium/chromedriver_2.40: not found

随机韧皮

• 随着Alpine Linux迁移到musl libc，是否有必要重建chromeDriver来使用它？

Answer 1

必须使用musl libc重建chromedriver或使用来自alpine repos的chromedriver软件包，您可以使用进行安装apk add --no-cache chromium-chromedriver。

您还需要告诉量角器chromeDriver: '/usr/bin/chromedriver'在量角器配置中使用正确的二进制文件 。