If you are just looking to run an image with docker and be able to interact with the shell then, … More
Tag: docker
Learning Docker from Hello exercise
If you are looking for to learn Docker, following a hello exercise to help you with it. Let’s create a … More
How to clean my local docker and prune all images?
Following the command. $ docker system prune -a
[Docker] – Using –build-arg to use safely confidential information to build docker images
In this post, we will do an example by using the flag –build-arg to build the image with a piece of … More
Why is not safe to use confidential data in the containers environment variables?
Remember that containers are just a “process”. Then, it means that the values of the environment variables can be found … More
[Docker] – Understanding Docker Container Networking
Docker creates automatically 3 networks as follows. $ docker network ls NETWORK ID NAME … More
[Docker] – Understanding Docker Images
They are nothing more than a text file called Dockerfile with the instructions which are required to build a container. Then, … More
Understanding containers in 15 minutes
We will use here the Docker containers as an example. However, beware that it is NOT the only existent solution … More
[Ansible] – How to create an Ubi/rhel7 image with ansible and python3?
Following an example over how to install ansible with python3 in a centos/rhel7 docker image. FROM registry.access.redhat.com/ubi7/ubi … RUN mkdir … More
Why use UBI minimal images for run applications in containers?
UBI minimal is smaller than the UBI ones and as the name says has the minimal as possible. So, because … More