Ansible - Python 解释器发现中未处理的错误

Question

I have a problem trying to ping to machines using ansible, 1 is fedora 35 the 2nd is ubuntu 21. when I run

ansible all -i inventory -m ping -u salam -k

I get the following warnings

[WARNING]: Unhandled error in Python interpreter discovery for host myubuntuIP: unexpected output from Python interpreter discovery [WARNING]: sftp transfer mechanism failed on [myubuntuIP]. Use ANSIBLE_DEBUG=1 to see detailed information [WARNING]: scp transfer mechanism failed on [myubuntuIP]. Use ANSIBLE_DEBUG=1 to see detailed information myubuntuIP | SUCCESS => { "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python3" }, "changed": false, "ping": "pong" } [WARNING]: Platform unknown on host myfedoraIP is using the discovered Python interpreter at /usr/bin/python, but future installation of another Python interpreter could change the meaning of that path. See https://docs.ansible.com/ansible-core/2.14/reference_appendices/interpreter_discovery.html for more information. myfedoraIP | SUCCESS => { "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python" }, "changed": false, "ping": "pong"

when I do

which python3

on both machines, I get 2 different paths as follows

/usr/bin/python3 for fedora box /bin/python3 for ubuntu box

I understand from 1 thread here that we should indicate the path of python in ansible.cfg file, Can I indicate 2 different paths in the ansible.cfg? If yes how? and why ansible is not able to find the python path?

Answer 1

First, the error on your Ubuntu system appears unrelated to this question; it says:

[WARNING]: sftp transfer mechanism failed on [myubuntuIP]
[WARNING]: scp transfer mechanism failed on [myubuntuIP]

I suspect to diagnose that issue you'll need to follow the instructions in the error message, set ANSIBLE_DEBUG=1 , and if the cause isn't immediately obvious open a new question here for that particular issue.

---

I understand from 1 thread here that we should indicate the path of python in ansible.cfg file, Can I indicate 2 different paths in the ansible.cfg? If yes how?

You don't set this in your ansible.cfg (unless you really do want a single setting for all your hosts); you set this in your Ansible inventory or in your host_vars or group_vars directory. For example, to set this on a specific host in your inventory, you might do something like this:

all:
  hosts:
    host1:
      ansible_python_interpreter: /usr/bin/python3
    host2:
    host3:

You could accomplish the same thing by placing:

ansible_python_interpreter: /usr/bin/python3

In host_vars/host1.yaml .

If the same configuration applies to more than one host, you can group them and then apply the setting as a group variable. For example, to apply the setting only to a subset of your hosts:

all:
  hosts:
    host1:
  children:
    fedora_hosts:
      vars:
        ansible_python_interpreter: /usr/bin/python3
      hosts:
        host2:
        host3:

Or to apply it globally:

all:
  vars:
    ansible_python_interpreter: /usr/bin/python3
  hosts:
    host1:
    host2:
    host3:

And why ansible is not able to find the python path?

That's not what the warning is telling you -- it was able to find the Python path ( /usr/bin/python ), but "future installation of another Python interpreter could change the meaning of that path" (because /usr/bin/python , depending on your distribution, could actually be python 2 instead of python 3, etc).