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Remove Untagged Images From Docker

Manu S Ajith

Jan 29, 2016 • 1 min read

To delete all untagged images:

docker rmi $(docker images -q --filter "dangling=true")

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Using variables inside binary pattern matching

I was refactoring a piece of code that I inherited in a codebase, which was parsing date from an external source in various formats into Date in elixir. The initial version of parse/1 function look something like the following: defmodule DateParser do def parse( <<_day_value::binary-size(

Manu S Ajith Dec 10, 2020 • 2 min read

Tracing in Elixir/Erlang using :erlang.trace and GenServer

Recently, I wanted to trace a running Elixir system and see the messages that a function received. I was looking to inspect the params that it received and even manipulate the params to fiddle with some edge cases in the system. I knew that I could use dbg to start

Manu S Ajith Oct 30, 2020 • 2 min read

Deleting stale Postgres wal files

I was debugging a system earlier today, where one of the postgres instances ran out of disk space, and taking a closer look at the system, I realised that the backup command was failing silently, but the postgres archive files was still being retained in the wal folder. Checking a

Manu S Ajith Oct 27, 2020 • 1 min read

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