Monthly Archives: April 2019

Linux: GPG-keys, Pass – passwords manager, and passwords import from the KeePass database

25 April 2019
 

 pass – a password manager for Linux/UNIX. Stores data in tree-based directories/files structure and encrypts files with a GPG-key. In Arch Linux present by default, in Debian can be installed using apt from default repositories: For macOS can be installed with Homebrew: The pass itself is just a bash-script: GPG keys management Creating GPG key… Read More »

Golang: pointers – detailed overview

20 April 2019
 

 What is the pointer? Shortly, the pointer is a variable which stores an address of another variable, where some data is stored. A pointer example Let’s take the simplest example where a pointer is used: package main import “fmt” func main() { a := 1 b := &a fmt.Println(“A: “, a) fmt.Println(“B: “, b) fmt.Println(“B:… Read More »

Authy: step by step Multi-Factor Authentication configuration for Github and AWS

17 April 2019
 

  I’m sure that using MFA (Multi-Factor Authentication) today is oblivious. For 2FA (2-Factor Authentication) the most used method is TOTP – Time-based One-time Password, when alongside with the common login:password also needs to enter a code generated by a device or software. The most known implementation is Google Authenticator but also there is a… Read More »

Jenkins: a job to check a Github organization’s public repositories list

16 April 2019
 

 Proceeding with a Github repositories checker. To recall: the idea is to have such a check in case if somebody from developers accidentally will share our project’s private repository as public, or will create a public repository instead of making it as a private one – we will get a Slack alarm about such a… Read More »

Redis: replication, part 4 – writing an Ansible role fore the Master-Slave replication with Redis Sentinel provisioning

15 April 2019
 

 The next post from the Redis replication series. Previous parts: Redis: replication, part 1 – an overview. Replication vs Sharding. Sentinel vs Cluster. Redis topology. Redis: replication, part 2 – Master-Slave replication, and Redis Sentinel Redis: replication, part 3 – redis-py and work with Redis Sentinel from Python The task now is to write an… Read More »

Arch Linux: Albion Online – Unable to preload the following plugins: libSDL2-2.0.so.0

14 April 2019
 

 Didn’t play in Albion Online for a while, but recalled about it and tried to play on my Arch Linux. It works fine from the Steam client, but I bought with a start package some time ago and can’t log in to Steam’s version with my old credentials. Okay – download game from the https://albiononline.com/ru/download,… Read More »

Go: checking public repositories list in Github. Go slices comparison. The first Golang experience.

13 April 2019
 

 The task is to write a tool which will be started from a Jenkin’s job by a cron and will check an organization’s public repositories list in the Github. A Docker-image build and a Jenkins job are described in the Jenkins: a job to check a Github organization’s public repositories list post. Then it has… Read More »

Redis: Sentinel – bind 0.0.0.0, the localhost issue and the announce-ip option

10 April 2019
 

 Originally, in a Sentinel’s configs, I have used the bind 0.0.0.0 to make them accessible from external hosts. Because of this when I started rolling out this setup on a real environment faced with an issue when Sentinels could not determine a Master host and other Sentinel hosts. In this post – such an issue… Read More »

Ansible: get a target host’s IP

9 April 2019
 

 The task is to get a host’s IP during executing an Ansible task. Below – two examples of how this can be done. Example 1 – hostvars See the documentation here>>>. Code: – name: Test hosts list debug: msg: “{{ hostvars[inventory_hostname][‘ansible_default_ipv4’][‘address’] }}” Run it: Example 2 – lookup and dig Another approach could be using… Read More »