为什么我不能运行 "source" 从加壳构建中发出命令？

Question

我正在尝试进行加壳构建。

我的源 AMI 是一个 Ubuntu 盒子。我想安装运行一个 python 虚拟环境。

我的供应商如下所示。 apt-get 工作正常，它创建了一个 virtualenv。但是，当我执行 source on activate 时，它失败了。我收到以下错误：/tmp/script.sh: 53: /tmp/script.sh

我的加壳程序似乎无法运行 source。我该如何解决这个问题？我需要运行 virtualenv 并在其中执行 pip install。

  "provisioners": [

    {
      "type": "shell",
      "inline": [
        "echo '70'",
        "sudo apt-get --assume-yes install python-virtualenv",
        "echo '80'",
        "sudo virtualenv /home/myuser/myVirtualEnv",
        "echo '90'",
        "ls -altr /home/myuser/myVirtualEnv/bin",
        "echo '95'",
        "source /home/myuser/myVirtualEnv/bin/activate",
        "echo '100'",
      ]
    }
  ]

控制台输出如下：

  myHostName: 70
  myHostName: Reading package lists... Done
  myHostName: Building dependency tree
  myHostName: Reading state information... Done
  myHostName: The following NEW packages will be installed:
  myHostName: python-virtualenv
  myHostName: 0 upgraded, 1 newly installed, 0 to remove and 125 not upgraded.
  myHostName: Need to get 1,485 kB of archives.
  myHostName: After this operation, 1,935 kB of additional disk space will be used.
  myHostName: Get:1 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/universe python-virtualenv all 1.11.4-1 [1,485 kB]
  myHostName: Fetched 1,485 kB in 0s (22.5 MB/s)
  myHostName: Selecting previously unselected package python-virtualenv.
  myHostName: (Reading database ... 56592 files and directories currently installed.)
  myHostName: Preparing to unpack .../python-virtualenv_1.11.4-1_all.deb ...
  myHostName: Unpacking python-virtualenv (1.11.4-1) ...
  myHostName: Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
  myHostName: Setting up python-virtualenv (1.11.4-1) ...
  myHostName: 80
  myHostName: New python executable in /home/myuser/myVirtualEnv/bin/python
  myHostName: Installing setuptools, pip...done.
  myHostName: 90
  myHostName: total 3312
  myHostName: lrwxrwxrwx 1 root root       6 Jun 25 17:21 python2.7 -> python
  myHostName: lrwxrwxrwx 1 root root       6 Jun 25 17:21 python2 -> python
  myHostName: -rwxr-xr-x 1 root root 3345416 Jun 25 17:21 python
  myHostName: -rwxr-xr-x 1 root root     254 Jun 25 17:21 easy_install-2.7
  myHostName: -rwxr-xr-x 1 root root     254 Jun 25 17:21 easy_install
  myHostName: -rwxr-xr-x 1 root root     226 Jun 25 17:21 pip2.7
  myHostName: -rwxr-xr-x 1 root root     226 Jun 25 17:21 pip2
  myHostName: -rwxr-xr-x 1 root root     226 Jun 25 17:21 pip
  myHostName: drwxr-xr-x 6 root root    4096 Jun 25 17:21 ..
  myHostName: -rw-r--r-- 1 root root    1129 Jun 25 17:21 activate_this.py
  myHostName: -rw-r--r-- 1 root root    2476 Jun 25 17:21 activate.fish
  myHostName: -rw-r--r-- 1 root root    1263 Jun 25 17:21 activate.csh
  myHostName: -rw-r--r-- 1 root root    2207 Jun 25 17:21 activate
  myHostName: drwxr-xr-x 2 root root    4096 Jun 25 17:21 .
  myHostName: 95
  myHostName: /tmp/script.sh: 53: /tmp/script.sh: source: not found
  myHostName: 100

Answer 1

您只能在您没有的 shell 内获取资源。还有一个更简单的解决方案，直接使用 virtualenv 中为您提供的二进制文件。

$ virtualenv foobarbaz
$ foobarbaz/bin/python -c 'import sys; print sys.prefix;'

说明了概念并将以与 pip 相同的方式工作。

Answer 2

请注意故障排除部分 here 中关于 shell 脚本的评论。默认情况下，加壳器使用 /bin/sh，在 Ubuntu 上是破折号 shell。破折号 shell 不支持 "source" 命令。相反，您可以：

使用“.”而不是来源
在打包文件中指定 inline_shebang
使用 "script" 而不是 "inline"

Answer 3

Packer 构建 HCL 文件：

build {
  provisioner "shell" {
    script = "../scripts/setup.sh"
  }
}

并在 setup.sh 中将 source 替换为 .:

#!/bin/bash

. env/bin/activate

为什么我不能运行 "source" 从加壳构建中发出命令？

Why can't I run "source" command from within a packer build?

python

packer

为什么我不能 运行 "source" 从加壳构建中发出命令？

Why can't I run "source" command from within a packer build?

python

packer

为什么我不能运行 "source" 从加壳构建中发出命令？