DevOps

A Guide to using git pull --rebase effectively Using git pull --rebase as your default merge strategy offers several benefits, particularly in maintaining a clean and linear commit history, which can simplify collaboration and code review. However, users may occasionally encounter the error “Cannot rebase onto multiple branches”. This article explains why this happens and provides a solution to make git pull --rebase work seamlessly. Benefits of git pull --rebase Linear History: Rebasing applies your local commits on top of the upstream changes, creating a straight line of commits without unnecessary merge commits. This makes the project history easier to read and understand. ...

I’ve been writing recently about best practices for patching and deprecating Docker images , but today I want to show how to automate a huge part of this process. You might already hear about Dependabot1, it’s a Github’s way to notify developers about security vulnerabilities in their projects. Renovate2 is similar tool3, but doesn’t require Github. For my professional work I use Bitbucket, so Renovate feels more universal as can be used anywhere. ...

First contact with make When I was invited for my first job interview in the IT, I’ve been asked such question: How would you typically build a program from sources, what commands will you use? I answered: It’s obvious: ./configure make make install Those times belong to the past now and nowadays not many programmers use GNU Make1. Try asking this question and you will see disgust at best. ...

Intro One of the biggest benefits of Docker images is their immutability. Once they’re built, they don’t change. Built once, would work forever… That’s how nightmares of security guys starts 🤣 We have then two contradictory concepts: flowchart LR id1(Keep it stable) <---> id2(Keep is up to date and secure) For day to day work, usually first concept wins. You want your builds stable and try to avoid tempting distractions of upgrading log4j to latest version… Who knows what might break. That’s fine, makes sense. ...

TL;DR While reasoning is important, readers may not be interested in all the frustrations I experienced while figuring out how to get things done. If you’re looking for a quick solution, skip to the “What eventually worked?” section. However, if you’re interested in the thought process behind the solution, keep reading. Why? Some might bother why the hell I’d like to make my life so hard? 🤣 We used to use nodeenv  external link for that purpose. It provides a simple script that allows to fetch any version of Node. You have to configure PATH variable and you’re done. It’s very simple from the perspective of Docker images operator. There’s one problem with nodeenv comparing it to the nvm - popularity. ...

I’m back on the big stage! I haven’t attend any big conferences as presenter for some time, but this year will change it. I’m starting big, with a talk: Docker base images - Ideas how to manage them on scale  external link on Devoxx  external link conference in Kraków, that will take place on 22-24th June 2022. ...

Projekt JednorożecPowieść o szansie w epoce przewrotów cyfrowych Author: Gene Kim amazon.plhelion.pl

Projekt FeniksPowieść o IT, modelu DevOps i o tym, jak pomóc firmie w odniesieniu sukcesu Authors: Gene Kim, Kevin Behr, George Spafford helion.pl

In recent Ansible update to 1.5 version there is really nice feature ssh pipelining. This option is serious alternative to accelerated mode. Just add to you config file (ex. ~/.ansible.cfg): [ssh_connection] pipelining=True Now run any playbook - you will see the difference 😄 Source (and extended info about): http://blog.ansibleworks.com/2014/01/15/ssh-connection-upgrades-coming-in-ansible-1-5/  external link

I was configuring GlusterFS on few servers using Ansible  external link and have a need to update /etc/hosts with hostnames for easier configuration. I found this one working: - name: Update /etc/hosts lineinfile: dest=/etc/hosts regexp='.*{{item}}$' line='{{hostvars.{{item}}.ansible_default_ipv4.address}} {{item}}' state=present with_items: '{{groups.somegroup}}' Source: http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html  external link