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Asked: 2023-08-21 23:09:41 +0800 CST

Ansible中执行命令包含双引号

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我想执行以下包含双引号的命令：

- name: Initializing Kubernetes cluster
    shell: kubeadm init --control-plane-endpoint "hostname:port"

不知道它是否会工作，就像我检查命令如下：

- debug:
  msg: kubeadm init --control-plane-endpoint "hostname:port"

它给出了kubeadm init --control-plane-endpoint \"hostname:port\". 为什么输出在引号之间包含额外的反斜杠？该命令会按原样正确执行吗？或者由于双引号我必须添加一些内容？（我无法通过执行它来进行测试，因为它是生产服务器）

shell

1 个回答

  1. Best Answer

    问：“为什么输出在引号之间包含额外的反斜杠？”

    答：Ansible 对输出中的双引号进行转义，告诉您双引号是字符串的一部分。例如，

        - shell: echo "\"This is a double-quoted string.\""
      register: out

    给出

      msg: |-
    .           123456789012345678901234567890123
    out.stdout: "This is a double-quoted string."
    length: 33
    out.cmd: echo "\"This is a double-quoted string.\""
    • 由您决定是否包含双引号。例如，
        - shell: echo "This is NOT a double-quoted string."
      register: out

    给出

      msg: |-
    out.stdout: This is NOT a double-quoted string.
    out.cmd: echo "This is NOT a double-quoted string."

    如果使用单引号样式，则不必转义双引号

        - shell: echo '"This is a double-quoted string."'
      register: out

    给出

      msg: |-
    .           123456789012345678901234567890123
    out.stdout: "This is a double-quoted string."
    length: 33
    out.cmd: echo '"This is a double-quoted string."'

    用于测试的完整剧本示例

    - hosts: localhost

  tasks:

    - shell: echo "This is NOT a double-quoted string."
      register: out
    - debug:
        msg: |
          out.stdout: {{ out.stdout }}
          out.cmd: {{ out.cmd }}

    - shell: echo "\"This is a double-quoted string.\""
      register: out
    - debug:
        msg: |
          .           123456789012345678901234567890123
          out.stdout: {{ out.stdout }}
          length: {{ out.stdout|length }}
          out.cmd: {{ out.cmd }}

    - shell: echo '"This is a double-quoted string."'
      register: out
    - debug:
        msg: |
          .           123456789012345678901234567890123
          out.stdout: {{ out.stdout }}
          length: {{ out.stdout|length }}
          out.cmd: {{ out.cmd }}

    问：“由于双引号（字符串），我是否必须添加一些内容？”

    在下面的命令中，双引号将由 shell 解释

    - shell: kubeadm init --control-plane-endpoint "hostname:port"

    如果您希望双引号成为字符串的一部分，您可以将其转义

    - shell: kubeadm init --control-plane-endpoint "\"hostname:port\""

    ，或用单引号括起来

    - shell: kubeadm init --control-plane-endpoint '"hostname:port"'

    问：“双引号将由 shell 解释。对吗？”

    答：对。脚本参数周围的引号的唯一目的是允许参数内有空格。例如，

    shell> cat test.sh
#!/usr/bin/sh
printf "$1\n"
printf "$2\n"

    给出

    shell> ./test.sh aaa bbb ccc
aaa
bbb

shell> ./test.sh aa a bbb ccc
aa
a

shell> ./test.sh "aa a" bbb ccc
aa a
bbb

shell> ./test.sh "aa a" "bbb" ccc
aa a
bbb

shell> ./test.sh "aaa" "\"bbb\"" ccc
aaa
"bbb"

shell> ./test.sh "aaa" '"bbb"' ccc
aaa
"bbb"
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