Ansible

 Enable debug

- debug:

       msg: "commands to print"

Ansible dry run with limit

--check --diff --limit hosts

Linux Ubuntu Docker install tzdata non interactive

 Problem

     Default Ubunt image from Docker does not come with Timezone data.  Installation of the package prompts for input, and this can be problematic for automated installation. This also cause issue when installing Python 3.9 on Docker image.

Solution

Create Timezone file and /etc/localtime link prior to installation 

 

apt update

echo "Europe/London" > /etc/timezone

ln -fs /usr/share/zoneinfo/Europe/London /etc/localtime

apt install -y tzdata
    

Docker Install Python3.9 non interactive

Summary 

Python3.9 is available as package distribution for ubuntu, however it can often be a challenge to install it interactively on Ubunt Docker image. This is because Timezone data (tzdata) is not installed and it prompts for Timezone information. 

Installing Python3.9 and Pip Nomal

apt update ; apt install -y python3.9 python3-pip
Installing Python 3.9 with TimeZone non-interactively
    

Installing Python 3.9 with TimeZone non-interactively

apt update

#Setup Timezone package. Not installed by default on Ubuntu, and will cause prompt when trying to install python 3.9

echo "Europe/London" > /etc/timezone

ln -fs /usr/share/zoneinfo/Europe/London /etc/localtime

apt install -y tzdata

#Install required version of Python. installed in /usr/bin

apt install -y python3.9 python3-pip

#Pip3 creates a link called python3 in /usr/bin This link determines which Python3 it works with. So repoint it to version required. 

[[ -f /usr/bin/python3 ]] && rm -f /usr/bin/python3 

#Linking python3 to python3.9

ln -s /usr/bin/python3.9 /usr/bin/python3