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Ansible error Shared connection to server closed

This article covers the Shared connection to server closed error which occur when we run an Ansible command to execute commands on two newly deployed CentOS 8 servers.
Ansible is an open-source automation tool, or platform, used for IT tasks such as configuration management, application deployment, intraservice orchestration, and provisioning.
While you can write Ansible modules in any language, most Ansible modules are written in Python, including the ones central to letting Ansible work. By default, Ansible assumes it can find a /usr/bin/python on your remote system that is either Python2, version 2.6 or higher or Python3, 3.5 or higher.

A quick fix to Ansible error Shared connection to server closed is to just add the path to python 3 in your inventory file.
It would look something like this:
ip_address ansible_python_interpreter=/usr/bin/python3
Then you could test if it works with the ping module:
ansible -m ping all

From the error details, the connection failed because the shell(s) in the remote system couldn't find the Python interpreter (/usr/bin/python) as indicated by the line: "module_stdout": "/bin/sh: /usr/bin/python: No such file or directory\r\n".
After checking the remote hosts, we discovered that the systems don't have Python 2 installed.
Check Python Binary
They have Python 3 installed by default and its binary is /usr/bin/python3.

According to the Ansible documentation, Ansible (2.5 and above) works with Python version 3 and above only.
Also, Ansible is supposed to automatically detect and use Python 3 on many platforms that ship with it.
However, if it fails to, then you can explicitly configure a Python 3 interpreter by setting the ansible_python_interpreter inventory variable at a group or host level to the location of a Python 3 interpreter.

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