Installing python 3, pip and boto3 on centos docker

Here are the steps to install python 3 on docker.

1. First download the appropriate docker image:

docker pull centos

2. Start the docker container:

docker run -it -name boto3-centos centos

The -name parameter ensures that the container has the name boto3-centos . You could name it whatever you find reasonable

Install GCC compiler and other dependencies for python:

yum install gcc openssl-devel bzip2-devel libffi-devel zlib-devel -y

4. Download python 3.7.x:

curl https://www.python.org/ftp/python/3.7.9/Python-3.7.9.tgz --output Python-3.7.9.tgz

5. Extract the tgz file

tar xzf Python-3.7.9.tgz

6. Install Python

cd Python-3.7.9
./configure --enable-optimizations
yum install make -y
make altinstall

7. Verify the version of python

python3.7 -V
>> Python 3.7.9
rm /usr/src/Python-3.7.9.tgz

Install pip:

yum -y install epel-release
curl https://bootstrap.pypa.io/get-pip.py --output get-pip.py
python3.7 get-pip.py
pip -V

Create a virtualenv

python3.7 -m venv my-venv

Activate the virtualenv

source my-venv/bin/activate

You are in your own virtual env and doing a pip freeze should give you an empty list

If your project has a set of python libs it needs, then add it to a requirements.txt file. Below is an example of the contents of requirements.txt with only boto3 as a necessary package

boto3==1.15.11

Install your packages in the virtual env

pip install -r requirements.txt

Now when you do pip freeze you will see boto3 and all its dependencies installed

Alternate version
yum update -y
[root@a32ad429b1bb Python-3.7.9]# yum install python3
Failed to set locale, defaulting to C.UTF-8
Last metadata expiration check: 0:51:13 ago on Sat Oct  3 05:24:50 2020.
Dependencies resolved.
================================================================================
Package             Arch   Version                             Repo       Size
================================================================================
Installing:
python36            x86_64 3.6.8-2.module_el8.1.0+245+c39af44f AppStream  19 k
Installing dependencies:
platform-python-pip noarch 9.0.3-16.el8                        BaseOS    1.8 M
python3-pip         noarch 9.0.3-16.el8                        AppStream  19 k
python3-setuptools  noarch 39.2.0-5.el8                        BaseOS    162 k
Enabling module streams:
python36                   3.6
Transaction Summary
================================================================================
Install  4 Packages
Total download size: 2.0 M
Installed size: 7.8 M

If you wanted to do this in a repeatable way, use the following Dockerfile:

Dockerfile for building image with python, pip and boto3

Copy the contents of the above and save it as Dockerfile . Then,

docker build . -t python-pip-boto3:0.1.1
docker run -it python-pip-boto3:0.1.1

You will now be inside a terminal running the in the container. Since the above dockerfile installs boto3 facilities for you, you can now use it in the python shell in the docker container:

[root@f81c0a1e50c3 tmp]# pip freeze
boto3==1.15.11
botocore==1.18.18
jmespath==0.10.0
python-dateutil==2.8.1
s3transfer==0.3.4
six==1.15.0
urllib3==1.25.11

References:

How To Install Python 3.7 on CentOS/RHEL 7/6 & Fedora 32/31

How to Set Up A Python Virtual Environment On CentOS | Liquid Web