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Hocker

"Hocker" is a Docker wrapper for "hacky shell script deployment".

Why?

Deploying code via hacky shell scripts, while not desirable, works OK for many use cases (simple nginx+wordpress+mysql deployments, for example).

The primary goal of Hocker is to simplify those hacky shell scripts, thus making them less error prone, while also adding new and improved functionality.

What?

Hocker allows for easily converting something like:

#!/bin/bash
set -e

exec docker run -d \
	--name apt-cacher-ng \
	--restart always \
	--dns 8.8.8.8 --dns 8.8.4.4 \
	--tmpfs /var/cache/apt-cacher-ng \
	tianon/apt-cacher-ng "$@"

Into something simpler, which also has more features:

#!/usr/bin/env hocker
# vim:set ft=sh:

hocker_run tianon/apt-cacher-ng \
	--dns 8.8.8.8 --dns 8.8.4.4 \
	--tmpfs /var/cache/apt-cacher-ng

Once saved as apt-cacher-ng and made executable:

$ ./apt-cacher-ng --help
usage: apt-cacher-ng [options]
   ie: apt-cacher-ng --redeploy smart --pull always
       apt-cacher-ng --redeploy always
       apt-cacher-ng --pull never

options:

  --pull [always|missing|never] (default: missing)

  --redeploy [smart|always|never] (default: never)

  -p (alias for '--pull always')
  -s (alias for '--redeploy smart')

$ ./apt-cacher-ng -ps

Pulling 'tianon/apt-cacher-ng' ...
Using default tag: latest
latest: Pulling from tianon/apt-cacher-ng
Digest: sha256:1eae691f71061becd87789669e03d9510389c94ff51283a6bc2d4ce20413e6d1
Status: Image is up to date for tianon/apt-cacher-ng:latest

Not restarting 'apt-cacher-ng' (--redeploy 'smart')

The "smart" redeployment logic will only restart our apt-cacher-ng container when the associated image it's started from changes.

...

youtu.be/79DijItQXMM

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