[英]Ansible Command module says that '|' is illegal character
I am using Ansible to deploy my project and I trying to check if an specified package is installed, but I have a problem with it task, here is the task:我正在使用 Ansible 来部署我的项目,我试图检查是否安装了指定的包,但我遇到了它的问题,这是任务:
- name: Check if python-apt is installed
command: dpkg -l | grep python-apt
register: python_apt_installed
ignore_errors: True
And here is the problem:这是问题所在:
$ ansible-playbook -i hosts idempotent.yml
PLAY [lxc-host] ***************************************************************
GATHERING FACTS ***************************************************************
ok: [10.0.3.240]
TASK: [idempotent | Check if python-apt is installed] *************************
failed: [10.0.3.240] => {"changed": true, "cmd": ["dpkg", "-l", "|", "grep", "python-apt"], "delta": "0:00:00.015524", "end": "2014-07-10 14:41:35.207971", "rc": 2, "start": "2014-07-10 14:41:35.192447"}
stderr: dpkg-query: error: package name in specifier '|' is illegal: must start with an alphanumeric character
...ignoring
PLAY RECAP ********************************************************************
10.0.3.240 : ok=2 changed=1 unreachable=0 failed=0
Why is illegal this character '|'为什么这个字符'|'是非法的. .
From the doc:从文档:
command - Executes a command on a remote node command - 在远程节点上执行命令
The command module takes the command name followed by a list of space-delimited arguments.命令模块采用命令名称后跟以空格分隔的参数列表。 The given command will be executed on all selected nodes.给定的命令将在所有选定的节点上执行。 It will not be processed through the shell, so variables like $HOME and operations like "<", ">", "|", and "&" will not work (use the shell module if you need these features).它不会通过 shell 进行处理,因此诸如 $HOME 之类的变量和诸如“<”、“>”、“|”和“&”之类的操作将不起作用(如果需要这些功能,请使用 shell 模块)。
shell - Executes a commands in nodes shell - 在节点中执行命令
The shell module takes the command name followed by a list of space-delimited arguments. shell 模块采用命令名称后跟以空格分隔的参数列表。 It is almost exactly like the command module but runs the command through a shell (/bin/sh) on the remote node.它几乎与命令模块完全一样,但通过远程节点上的 shell (/bin/sh) 运行命令。
Therefore you have to use shell: dpkg -l | grep python-apt
因此你必须使用shell: dpkg -l | grep python-apt
shell: dpkg -l | grep python-apt
. shell: dpkg -l | grep python-apt
。
read about the command module in the Ansible documentation :阅读Ansible 文档中的命令模块:
It will not be processed through the shell, so .. operations like "<", ">", "|", and "&" will not work它不会通过 shell 进行处理,因此 .. 诸如“<”、“>”、“|”和“&”之类的操作将不起作用
As it recommends, use the shell module :按照它的建议,使用shell 模块:
- name: Check if python-apt is installed
shell: dpkg -l | grep python-apt
register: python_apt_installed
ignore_errors: True
For what it's worth, you can check/confirm the installation in a debian environment using the apt
command :对于它的价值,您可以使用apt
命令在 debian 环境中检查/确认安装:
- name: ensure python-apt is installed
apt: name=python-apt state=present
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