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DevOps

How to setup private Docker registry

Setup a simple Docker registry to use it privately or share images which a team of developers.

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DevOps

How to create base Docker image

Create a base Docker image using debootstrap utility.

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DevOps

How to choose IP addresses and domain names for documentation

It is a good practice to not use valid domain names or already assigned IP addresses while writing documentation. I will provide you with RFC documents that are needed to reduce the likelihood of conflict and confusion.

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DevOps

How to upgrade lxd guests

It is time to mention about simple sequential or simultaneous upgrade process on lxd guests. It is adapted to Debian-like operating systems using apt as I am using these daily.

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DevOps

How to check connection to the RabbitMQ message broker

Use Python script to verify that client can connect to the RabbitMQ message broker.

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DevOps

How to post message from command-line into Slack

Use a defined webhook to post a message from the command-line as a parameter, standard input, or a file into Slack/Mattermost. Take advantage of colors, icons, and markdown to enhance your message.

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DevOps

How to setup apt-cacher-ng Vagrant box

Vagrant is an awesome piece of software, but constantly downloading system packages can be very time-consuming. The simplest solution is to set up an apt caching proxy as a Vagrant box.

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DevOps

How to setup DokuWiki Vagrant box

Today, I will publish Vagrant configuration to set up DokuWiki instance. It is just a handy reference, as described in the earlier blog post.

Categories
DevOps WebOps

How to extract the cover image from an e-book

I have successfully used Google Drive and Insync to organize all of the e-books that I have acquired during the last years. Currently plan to upload them to a personal DokuWiki instance since I use it more every day. Before I can start, I need to extract cover images to ensure that I will get a decent outcome.

Categories
DevOps

How to remotely check PostgreSQL version

Today I will shortly describe how you can remotely check the PostgreSQL version and use it inside shell scripts. This ability comes in handy at times, as it can be used to perform different tasks depending on the returned database version.