Skip to content

Instantly share code, notes, and snippets.

View hypnoglow's full-sized avatar
Stay curious

Igor Zibarev hypnoglow

Stay curious
View GitHub Profile

I have been an aggressive Kubernetes evangelist over the last few years. It has been the hammer with which I have approached almost all my deployments, and the one tool I have mentioned (shoved down clients throats) in almost all my foremost communications with clients, and it was my go to choice when I was mocking my first startup (

A few weeks ago Docker 1.13 was released and I was tasked with replicating a client's Kubernetes deployment on Swarm, more specifically testing running compose on Swarm.

And it was a dream!

All our apps were already dockerised and all I had to do was make a few modificatons to an existing compose file that I had used for testing before prior said deployment on Kubernetes.

And, with the ease with which I was able to expose our endpoints, manage volumes, handle networking, deploy and tear down the setup. I in all honesty see no reason to not use Swarm. No mission-critical feature, or incredibly convenient really nice to have feature in Kubernetes that I'm go

popravich / PostgreSQL_index_naming.rst
Last active May 30, 2024 06:39
PostgreSQL index naming convention to remember

The standard names for indexes in PostgreSQL are:


where the suffix is one of the following:

  • pkey for a Primary Key constraint;
  • key for a Unique constraint;
  • excl for an Exclusion constraint;
  • idx for any other kind of index;
package main
const MaxLength = 1 << 20
var (
addr = flag.String("listen", ":8000", "listen for requests")
numprocs = flag.Int("p", runtime.NumCPU(), "number of workers to start")
maxqueue = flag.Int("q", runtime.NumCPU()*2, "largest queue size")
jobs chan Job
nerdalert /
Last active June 6, 2024 15:53
Linux NetFilter, IP Tables and Conntrack Diagrams

Linux NetFilter, IP Tables and Conntrack Diagrams


IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

├── books
│   ├── handlers.go
│   └── models.go
├── config
│   └── db.go
└── main.go
lelandbatey /
Last active June 16, 2024 13:44
Whiteboard Picture Cleaner - Shell one-liner/script to clean up and beautify photos of whiteboards!


This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"