Ansible 环境查找不会给出变量的内容，但它已定义

Question

我正在尝试查询

ORACLE_HOME

环境变量，该变量是通过事实收集收集的。

我尝试按如下方式访问它：

- name: Print oracle_home env
  debug:
    msg: "{{ lookup('ansible.builtin.env','ORACLE_HOME') }}"

但是除了空字符串之外我没有得到任何结果。

但是，如果我查询整个

ansible_env

变量，则指定

ORACLE_HOME

：

- name: Print ansible_env
  debug:
    msg: "{{ ansible_env }}"

"msg": {
        "BASH_FUNC_mc%%": "() {  . /usr/share/mc/mc-wrapper.sh\n}",
        "COLORTERM": "1",
        "CPU": "x86_64",
        "CSHEDIT": "emacs",
        "CVS_RSH": "ssh",
        "DBUS_SESSION_BUS_ADDRESS": "unix:path=/run/user/0/bus",
        "FROM_HEADER": "",
        "GPG_TTY": "/dev/pts/0",
        "G_BROKEN_FILENAMES": "1",
        "HISTSIZE": "1000",
        "HOME": "/root",
        "HOST": "XYZ",
        "HOSTNAME": "XYZ",
        "HOSTTYPE": "x86_64",
        "LANG": "POSIX",
        "LC_CTYPE": "en_US.UTF-8",
        "LESS": "-M -I -R",
        "LESSCLOSE": "lessclose.sh %s %s",
        "LESSKEY": "/etc/lesskey.bin",
        "LESSOPEN": "lessopen.sh %s",
        "LESS_ADVANCED_PREPROCESSOR": "no",
        "LIBGL_DEBUG": "quiet",
        "LOGNAME": "root",
        "MACHTYPE": "x86_64-suse-linux",
        "MAIL": "/var/spool/mail/root",
        "MANPATH": "/usr/share/man:/usr/local/man",
        "MINICOM": "-c on",
        "MORE": "-sl",
        "ORACLE_BASE": "/u01/app/oracle",
        "ORACLE_HOME": "/u01/app/oracle/product/18c/xe",
        "ORACLE_SID": "XE",
        "OSTYPE": "linux",
        "PAGER": "less",
        "PATH": "/sbin:/usr/sbin:/usr/local/sbin:/root/bin:/usr/local/bin:/usr/bin:/bin",
        "PROFILEREAD": "true",
        "PWD": "/root",
        "PYTHONSTARTUP": "/etc/pythonstart",
        "QT_SYSTEM_DIR": "/usr/share/desktop-data",
        "SHELL": "/bin/bash",
        "SHLVL": "2",
        "SSH_TTY": "/dev/pts/0",
        "TERM": "xterm",
        "USER": "root",
        "WINDOWMANAGER": "/usr/bin/icewm-session",
        "XCURSOR_THEME": "DMZ",
        "XDG_CONFIG_DIRS": "/etc/xdg",
        "XDG_DATA_DIRS": "/usr/share",
        "XDG_RUNTIME_DIR": "/run/user/0",
        "XDG_SESSION_CLASS": "user",
        "XDG_SESSION_ID": "21",
        "XDG_SESSION_TYPE": "tty",
        "XKEYSYMDB": "/usr/X11R6/lib/X11/XKeysymDB",
        "XNLSPATH": "/usr/X11R6/lib/X11/nls",
        "_": "/usr/bin/python3.6"

有人可以帮助我吗？我做错了什么？

Answer 1

lookup() 在 Ansible 控制器上进行评估，可能不是您在用例中需要的。

- name: Print local oracle_home env
  debug:
    msg: "{{ lookup('ansible.builtin.env','ORACLE_HOME') }}"

如果您需要目标计算机上的 ORACLE_HOME，您可以更好地使用它：

- name: Print remote oracle_home env
  debug:
    msg: "{{ ansible_env.ORACLE_HOME }}"

注意：您的剧本需要

gather_facts: true

或

ansible.builtin.setup:

才能让 ansible_facts 填充环境变量。