Anatomy of a sample docker file

July 11, 2024

Just a quick refresh on the elements of a sample docker file:

FROM ubuntu

LABEL maintainer="Mike <[email protected]>"

USER root

COPY ./foo.bash /

RUN apt -y update
RUN apt -y install foo foo2
RUN chmod 755 /foo.bash

USER nobody


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Explain to me like I'm 9: what exactly ARE Docker containers?

July 10, 2024

I recently came across what could be the best explanation of containers and wanted to share it.

Source: "Learning Docker" series on LinkedIn Learning by Carlos Nunez.

  • A container is composed of two things: a Linux namespace and a Linux control group.
  • Namespaces are a Linux kernel feature that provides . . .

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Pondering the "it works on my machine" problem

July 09, 2024

I've been working recently with Kubernetes and docker (super fun!). A question kept lingering in the back of my mind though: why is inconsistent stability and results in prod such a broadly reported issue?

I came across a LinkedIn course by Carlos Nunez and I really liked the reasons he gave:

  • Missing Tools - . . .

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Refresher on Docker Containers

July 09, 2024

Here's a quick recap on Docker containers and how they work.

  • Containers are virtualized instances of operating system kernels.
  • Be careful though: Unlike virtual machines, while containers look like separate smaller instances of Linux or Windows, they consume resources like processor time, memory, and disk space directly . . .

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