Terraform:heredoc 锚点中的无效字符 [英] Terraform: invalid characters in heredoc anchor

问题描述

我正在尝试在我的 terraform 脚本的 provisioner "remote-exec" 块中使用多行字符串.然而，每当我使用文档和各种示例中概述的 EOT 语法时，我都会收到一个错误，抱怨有:heredoc 锚中的无效字符.

I am trying to use a multiline string in the provisioner "remote-exec" block of my terraform script. Yet whenever I use the EOT syntax as outlined in the documentation and various examples I get an error that complains about having: invalid characters in heredoc anchor.

以下是收到此错误的简单 provisioner "remote-exec" 示例(两种类型的 EOT 在单独尝试时都会收到此错误):

Here is an example of a simple provisioner "remote-exec" that received this error (both types of EOT receive this error when attempted separately):

provisioner "remote-exec" {
  inline = [
    << EOT 
    echo hi 
    EOT,

    << EOT 
    echo 
    hi 
    EOT,
  ]
}

更新:这是可行的解决方案，如果您遇到此问题，请仔细阅读，因为 terraform 在 EOF 方面非常挑剔:

Update: Here is the working solution, read carefully if you are having this issue because terraform is very picky when it comes to EOF:

provisioner "remote-exec" {
  inline = [<<EOF

   echo foo
   echo bar

  EOF
  ]
}

请注意，如果您想使用 EOF，则在 provisioner "remote-exec" 块中使用的所有命令都必须在 EOF 内.您不能同时拥有 EOF 和非 EOF 之一.

Note that if you want to use EOF all the commands you use in a provisioner "remote-exec" block must be inside the EOF. You cannot have both EOF and non EOF its one or the other.

EOF 的第一行必须这样开始，并且在 <<EOF 之后的这一行中不能有任何空格，否则它会抱怨有 heredoc 锚中的无效字符:

The first line of EOF must begin like this, and you cannot have any whitespace in this line after <<EOF or else it will complain about having invalid characters in heredoc anchor:

  inline = [<<EOF

你的 EOF 必须像这样以 EOF 结尾，与 ]

Your EOF must then end like this with the EOF at the same indentation as the ]

  EOF
  ]

推荐答案

Terraform 中的Heredocs 对周围的空白特别有趣.

Heredocs in Terraform are particularly funny about the surrounding whitespace.

将您的示例更改为以下内容似乎可以消除heredoc 特定的错误:

Changing your example to the following seems to get rid of the heredoc specific errors:

provisioner "remote-exec" {
  inline = [<<EOF
echo hi
EOF,
<<EOF
echo 
hi
EOF
  ]
}

尽管内联数组是应在远程主机上运行的命令列表，但您根本不需要在此处使用多个 heredocs.使用带有多行命令的 heredoc 对您来说应该可以正常工作:

You shouldn't need multiple heredocs in here at all though as the inline array is a list of commands that should be ran on the remote host. Using a heredoc with commands across multiple lines should work fine for you:

provisioner "remote-exec" {
  inline = [<<EOF
echo foo
echo bar
EOF
  ]
}

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