无法通过cloud-init使bash脚本起作用 [英] Cannot make bash script work from cloud-init

问题描述

显然我在这里做错了.

云初始化脚本/etc/cloud/cloud.cfg

...
runcmd:
 - [ sh, /opt/cloud-init-scripts/whatever.sh ]

脚本/opt/cloud-init-scripts/whatever.sh

#!/bin/bash
...
. /home/ubuntu/third-party/script.sh --silent

第三方脚本/home/ubuntu/third-party/script.sh

#!/usr/bin/env bash

function some_function() {
...

错误，我进入/var/log/cloud-init-output.log

/opt/cloud-init-scripts/whatever.sh: 3: /home/ubuntu/third-party/script.sh: Syntax error: "(" unexpected

我肯定在这里缺少明显的东西.我在调用第三方脚本时尝试使用 source ，.和 sh ，尝试在各处更改shebang，但未成功.

I must be missing something obvious here. I tried using source, . and sh when calling the third party script, tried changing shebangs everywhere but no success.

如果我从命令行运行相同的命令，它将起作用.

If I run the same command from command line it works.

推荐答案

您已在 runcmd 下指定了 sh shell，但将she-bang设置为 bash.后者并不重要，因为如果您以 sh/opt/cloud-init-scripts/whatever.sh 身份运行，它将以sh shell身份运行.我想您可能正在使用与 sh shell不兼容的非 POSIX shell功能.

You have specified sh shell under runcmd, but have she-bang set to bash. The latter does not matter because if you run as sh /opt/cloud-init-scripts/whatever.sh it will be run with sh shell. I guess you are probably using a non POSIX shell feature which is incompatible with the sh shell.

或者如果您打算在 bash shell中运行脚本，则将 cloud-init 脚本中的 runCmd 更改为

Or alternatively if your intention is to run the script in bash shell, change the runCmd in cloud-init script to

runcmd:
 - [ bash, /opt/cloud-init-scripts/whatever.sh ]

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