Q：“为什么输出在引号之间包含额外的反斜杠？“**
答：Ansible在输出中转义了双引号，告诉你双引号是字符串的一部分。比如说，

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

给

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

• 是否包含双引号取决于您。比如说，

- shell: echo "This is NOT a double-quoted string."
      register: out

给

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

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（一个字符串），我必须添加一些东西吗？“**
在下面的命令中，双引号将由shell解释

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

如果你想让双引号成为字符串的一部分，你可以对它进行转义

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

，或用单引号将其结束

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

Q：*“双引号将由shell解释。对不对？“
答：对。脚本参数周围的引号的唯一作用是允许参数中有空格。比如说，

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

给

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"