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Update: turned it into a post, see https://suraj.dev/blog/sending-kubernetes-events-to-sentry

Setup sentry-kubernetes for multiple clusters

• build image
• configure RBAC in all target clusters using setup-access.yaml
• deploy it (use deploy.rb)

How does deploy.rb works

• get list of all clusters from clusters.yaml

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# flipper with ActiveRecord backend, taken from 
# https://github.com/jnunemaker/flipper/blob/master/examples/active_record/internals.rb
# get all features
ap Flipper::Adapters::ActiveRecord::Feature.all

# get all actors which have a feature enabled
feature_name = "scope_by_tag_group.pg_lookup"
ap Flipper::Adapters::ActiveRecord::Gate.where(feature_key: feature_name)

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Puma Stats Logger - plugin for collecting puma metrics

to configure this plugin, add following in your puma.rb

# plugin to send server stats to our monitoring systems
# export SERVER_STATS_FREQUENCY (seconds) to control the frequency
plugin :stats_logger

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# bash script to get title of a url and then dump it in Markdown format link
# credit: https://unix.stackexchange.com/a/103253

function url_to_md( ) {
t=$(wget -qO- $1 | perl -l -0777 -ne 'print $1 if /<title.*?>\s*(.*?)\s*<\/title/si')
echo "[$t]($1)"
}


# example usage

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# frozen_string_literal: true

# Ref.: https://hiltmon.com/blog/2012/02/27/quick-and-dirty-rails-performance-profiling/
# Usage:
# RubyProfiler.prof('my_profile') do
#   slow code
#   ...
# end
# You can also pass a `enabled: false` to disable profiler
#

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Synaptics Touchpad on ubuntu 18.04 on Dell Inspiron 3542

I had an issue where touchpad used to mess around change my focus, so i used following commands as startup script to disable touchpad when I am typing

# disable touch pad for one second, when keyboard is in use
# add this as a startup command to presist it across reboots
syndaemon -i 1

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TP-Link AC600 Archer T2U Nano - Ubuntu 18.04 - Info and drivers

UPDATE: I turned it into blog post, you can read it here: https://suraj.dev/blog/configuring-wireless-usb-adapter-archer-t2u-nano-on-linux

My T2U has ID 2357:011e and solution metioned in this SO Thread is for same devide ID

Here is full text of Answer: https://askubuntu.com/a/1149288

# For the T2U with ID 2357:011e do

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class BGThreadPoolT
  # class attribute to store BGThreadPool metrics
  class_attribute :metrics
  # @note don't set this in code, it should only be set once on load
  # setting it again will result in loss of metrics
  self.metrics = Concurrent::Array.new
  def add_things
    self.class.metrics << "test #{self.object_id}"
    return nil
  end

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Export Rackspace Cloud DNS domain to a zone file

Rackspace Cloud DNS does not support exporting a domain from the web interface, but it does from the API. This is a simple script that does just that and nothing else, without using any non-standard libraries.

Log in to the Cloud Control Panel, go to Account > Account Settings and there you will find your username and API key.

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# frozen_string_literal: true

# Module to covert Prometheus metrics collected to graphite
# format (hash with series and value)
# This is used to ship ruby-kafka metrics to graphite
#
# usage:
# require 'prometheus/client'
# registry = Prometheus::Client.registry
# data = PromToGraphite.marshal(registry)