Ansible 没有看到已安装的 Python 模块 [英] Ansible doesn't see an installed Python module
问题描述
我正在尝试创建一个 Ansible playbook,它将设置一个 local Postgres 数据库,用于某个应用程序的本地/开发测试.
I am trying to create an Ansible playbook which would setup a local Postgres database to be used for local/dev testing of a certain app.
postgresql_db
似乎是我需要的 Ansible 模块,而 psycopg2
是列为依赖项的 Python 模块.
postgresql_db
seems to be the Ansible module I need, and psycopg2
is the Python module listed as a dependency.
因此,在安装 Ansible 的同一个 virtualenv 中,我还安装了 psycopg2(我在 Mac 上使用 pipenv
运行).
So in the same virtualenv where I have installed Ansible, I also installed psycopg2 (I'm running on Mac with pipenv
).
但是当我用这个命令运行我的剧本时:
But when I run my playbook with this command:
ansible-playbook pg_local.yml --connection=local
我收到错误:
msg":需要python psycopg2模块"
"msg": "the python psycopg2 module is required"
剧本很小:
---
- hosts: my_ws
tasks:
- name: create a db
postgresql_db:
name: mynewdb
/etc/ansible/hosts
也是如此:
[my_ws]
localhost
我怀疑不知何故远程"真正本地的机器正在尝试 import psycopg2
,它在没有模块的 Python 环境中运行.--connection=local
是罪魁祸首吗?
I suspect that somehow the "remote" machine, which is really local, is trying to import psycopg2
, which running in a Python environment which doesn't have the module. Is the --connection=local
to blame?
我添加它是为了解决 ssh: connect to host localhost port 22: Connection denied
错误,因为我打算只在本地运行它.我不认为这是错误的 - 但我确实想知道它是否会破坏 Ansible 的环境.
I have added it to solve the ssh: connect to host localhost port 22: Connection refused
error, and as I do intend to run this only locally. I don't think it's wrong - but I do wonder if it messes up the environment for Ansible.
我在剧本中添加了测试和报告"任务,但未检测到任何问题:
I have added a 'test and report' task to the playbook and no problems were detected:
changed: [localhost] => {
"changed": true,
"cmd": [
"python",
"-c",
"import psycopg2; print(psycopg2.__version__)"
],
"delta": "0:00:00.087664",
"end": "2018-08-22 13:36:17.046624",
"invocation": {
"module_args": {
"_raw_params": "python -c 'import psycopg2; print(psycopg2.__version__)'",
"_uses_shell": false,
"argv": null,
"chdir": null,
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"warn": true
}
},
"rc": 0,
"start": "2018-08-22 13:36:16.958960",
"stderr": "/Users/lsh783/.local/share/virtualenvs/docker-ansible-setup--HsJmUMv/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use \"pip install psycopg2-binary\" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.\n \"\"\")",
"stderr_lines": [
"/Users/lsh783/.local/share/virtualenvs/docker-ansible-setup--HsJmUMv/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use \"pip install psycopg2-binary\" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.",
" \"\"\")"
],
"stdout": "2.7.5 (dt dec pq3 ext lo64)",
"stdout_lines": [
"2.7.5 (dt dec pq3 ext lo64)"
]
}
我确实在带有 -vvv
的输出中看到了这一行:
I do see this line in the output with -vvv
:
<localhost> EXEC /bin/sh -c '/usr/bin/python /Users/lsh783/.ansible/tmp/ansible-tmp-1534957231.272713-121756549613883/postgresql_db.py > && sleep 0'
让我烦恼的是,它不是我所处的虚拟环境中的 Python.
and it bothers me that it's not the Python inside the virtual environment I'm under.
推荐答案
这是由 众所周知 和 描述 Ansible 的行为.
简而言之,如果您在清单中的任何位置指定 localhost
,Ansible 将默认使用 /usr/bin/python
来运行模块,而不管 连接:本地
设置.
In short, if you specify localhost
wherever in your inventory, Ansible will default to using /usr/bin/python
for running the modules regardless of the connection: local
setting.
如果在用于执行剧本的 Python 环境中安装了额外的库,而不是为 /usr/bin/python
安装了额外的库,这反过来会导致问题.
This in turn will cause problems if additional libraries were installed in a Python environment used to execute a playbook, but not for the /usr/bin/python
.
解决方案是为 localhost
指定 ansible_python_interpreter
.在你的情况下:
The solution is to specify ansible_python_interpreter
for the localhost
. In your case:
[my_ws]
localhost ansible_python_interpreter={{ansible_playbook_python}}
<小时>
由于上述原因,验证模块存在的测试应该是:
Because of the above, the test to verify module presence should be:
- command: "{{ ansible_python_interpreter | default('/usr/bin/python') }} -c 'import {{ module }}; print({{ module }}.__version__)'"
vars:
module: psycopg2
register: test
- debug:
var: test.stdout
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